Perpetual benchmark thread... - Page 21

moebius · 2009-11-14, 08:13

AMD Phenom(tm) II X4 955 Processor
CPU speed: 3616.00 MHz, 4 cores
CPU features: RDTSC, CMOV, Prefetch, 3DNow!, MMX, SSE, SSE2
L1 cache size: 64 KB
L2 cache size: 512 KB, L3 cache size: 6 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
L1 TLBS: 48
L2 TLBS: 512
Prime95 32-bit version 25.9, RdtscTiming=1
Best time for 768K FFT length: 11.699 ms.
Best time for 896K FFT length: 14.233 ms.
Best time for 1024K FFT length: 16.163 ms.
Best time for 1280K FFT length: 20.475 ms.
Best time for 1536K FFT length: 24.505 ms.
Best time for 1792K FFT length: 30.001 ms.
Best time for 2048K FFT length: 33.958 ms.
Best time for 2560K FFT length: 44.735 ms.
Best time for 3072K FFT length: 53.441 ms.
Best time for 3584K FFT length: 64.947 ms.
Best time for 4096K FFT length: 73.566 ms.
Best time for 5120K FFT length: 97.125 ms.
Best time for 6144K FFT length: 122.152 ms.
Best time for 7168K FFT length: 151.038 ms.
Best time for 8192K FFT length: 172.531 ms.
Timing FFTs using 2 threads.
Best time for 768K FFT length: 8.468 ms.
Best time for 896K FFT length: 10.997 ms.
Best time for 1024K FFT length: 13.325 ms.
Best time for 1280K FFT length: 15.862 ms.
Best time for 1536K FFT length: 19.257 ms.
Best time for 1792K FFT length: 22.824 ms.
Best time for 2048K FFT length: 26.030 ms.
Best time for 2560K FFT length: 34.687 ms.
Best time for 3072K FFT length: 41.220 ms.
Best time for 3584K FFT length: 48.786 ms.
Best time for 4096K FFT length: 54.699 ms.
Best time for 5120K FFT length: 54.464 ms.
Best time for 6144K FFT length: 66.127 ms.
Best time for 7168K FFT length: 79.969 ms.
Best time for 8192K FFT length: 90.241 ms.
Timing FFTs using 3 threads.
Best time for 768K FFT length: 6.321 ms.
Best time for 896K FFT length: 7.336 ms.
Best time for 1024K FFT length: 8.395 ms.
Best time for 1280K FFT length: 14.364 ms.
Best time for 1536K FFT length: 16.925 ms.
Best time for 1792K FFT length: 19.806 ms.
Best time for 2048K FFT length: 22.407 ms.
Best time for 2560K FFT length: 30.807 ms.
Best time for 3072K FFT length: 36.088 ms.
Best time for 3584K FFT length: 41.646 ms.
Best time for 4096K FFT length: 46.496 ms.
Best time for 5120K FFT length: 38.431 ms.
Best time for 6144K FFT length: 46.875 ms.
Best time for 7168K FFT length: 56.333 ms.
Best time for 8192K FFT length: 63.816 ms.
Timing FFTs using 4 threads.
Best time for 768K FFT length: 5.813 ms.
Best time for 896K FFT length: 7.073 ms.
Best time for 1024K FFT length: 8.070 ms.
Best time for 1280K FFT length: 13.518 ms.
Best time for 1536K FFT length: 16.056 ms.
Best time for 1792K FFT length: 19.021 ms.
Best time for 2048K FFT length: 21.272 ms.
Best time for 2560K FFT length: 29.128 ms.
Best time for 3072K FFT length: 34.316 ms.
Best time for 3584K FFT length: 39.276 ms.
Best time for 4096K FFT length: 43.892 ms.
Best time for 5120K FFT length: 32.375 ms.
Best time for 6144K FFT length: 38.699 ms.
Best time for 7168K FFT length: 46.024 ms.
Best time for 8192K FFT length: 51.565 ms.
Best time for 58 bit trial factors: 3.211 ms.
Best time for 59 bit trial factors: 3.214 ms.
Best time for 60 bit trial factors: 3.234 ms.
Best time for 61 bit trial factors: 3.218 ms.
Best time for 62 bit trial factors: 3.224 ms.
Best time for 63 bit trial factors: 5.929 ms.
Best time for 64 bit trial factors: 5.921 ms.
Best time for 65 bit trial factors: 5.907 ms.
Best time for 66 bit trial factors: 5.862 ms.
Best time for 67 bit trial factors: 5.876 ms.

lycorn · 2009-11-16, 11:55

As we have been made aware by many benchmarks already posted in this forum, Prime 95 doesn´t scale very well as the number of threads per test goes up. That´s an established fact.
Now what would be interesting to post, in my opinion, is the per iteration times when the number of worker windows (each one single threaded) goes up. That gives a good indication of whether we should use a given multi core CPU just for LL work (one test per core). If the iteration times are getting real worse with more workers running, it is then probably better to switch on or two cores to TF, for example.
As far as I could see, this type of benchmark hasn´t been posted much. I therefore suggest that we start posting this type of data, particularly for quad cores.

garo · 2009-11-17, 22:42

At stock with memory running at 1333/CL9

Code:

Intel(R) Core(TM) i5 CPU         750  @ 2.67GHz
CPU speed: 2664.86 MHz, 4 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 8 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 32-bit version 25.11, RdtscTiming=1
Best time for 768K FFT length: 14.15 ms.
Best time for 896K FFT length: 17.28 ms.
Best time for 1024K FFT length: 19.61 ms.
Best time for 1280K FFT length: 24.53 ms.
Best time for 1536K FFT length: 29.38 ms.
Best time for 1792K FFT length: 35.82 ms.
Best time for 2048K FFT length: 40.49 ms.
Best time for 2560K FFT length: 53.61 ms.
Best time for 3072K FFT length: 64.92 ms.
Best time for 3584K FFT length: 79.34 ms.
Best time for 4096K FFT length: 89.47 ms.
Best time for 5120K FFT length: 114.79 ms.
Best time for 6144K FFT length: 136.35 ms.
Best time for 7168K FFT length: 166.41 ms.
Best time for 8192K FFT length: 186.84 ms.
Timing FFTs using 2 threads.
Best time for 768K FFT length: 7.47 ms.
Best time for 896K FFT length: 9.03 ms.
Best time for 1024K FFT length: 10.51 ms.
Best time for 1280K FFT length: 12.83 ms.
Best time for 1536K FFT length: 15.53 ms.
Best time for 1792K FFT length: 18.86 ms.
Best time for 2048K FFT length: 21.32 ms.
Best time for 2560K FFT length: 27.90 ms.
Best time for 3072K FFT length: 33.60 ms.
Best time for 3584K FFT length: 40.83 ms.
Best time for 4096K FFT length: 46.09 ms.
Best time for 5120K FFT length: 59.06 ms.
Best time for 6144K FFT length: 70.40 ms.
Best time for 7168K FFT length: 85.81 ms.
Best time for 8192K FFT length: 96.68 ms.
Timing FFTs using 3 threads.
Best time for 768K FFT length: 5.86 ms.
Best time for 896K FFT length: 6.73 ms.
Best time for 1024K FFT length: 8.83 ms.
Best time for 1280K FFT length: 8.68 ms.
Best time for 1536K FFT length: 10.36 ms.
Best time for 1792K FFT length: 12.69 ms.
Best time for 2048K FFT length: 14.29 ms.
Best time for 2560K FFT length: 18.75 ms.
Best time for 3072K FFT length: 22.73 ms.
Best time for 3584K FFT length: 27.81 ms.
Best time for 4096K FFT length: 31.50 ms.
Best time for 5120K FFT length: 40.80 ms.
Best time for 6144K FFT length: 51.13 ms.
Best time for 7168K FFT length: 61.64 ms.
Best time for 8192K FFT length: 70.36 ms.
Timing FFTs using 4 threads.
Best time for 768K FFT length: 5.22 ms.
Best time for 896K FFT length: 5.89 ms.
Best time for 1024K FFT length: 7.87 ms.
Best time for 1280K FFT length: 7.16 ms.
Best time for 1536K FFT length: 8.45 ms.
Best time for 1792K FFT length: 9.71 ms.
Best time for 2048K FFT length: 11.02 ms.
Best time for 2560K FFT length: 14.34 ms.
Best time for 3072K FFT length: 17.35 ms.
Best time for 3584K FFT length: 21.09 ms.
Best time for 4096K FFT length: 23.86 ms.
Best time for 5120K FFT length: 30.74 ms.
Best time for 6144K FFT length: 37.98 ms.
Best time for 7168K FFT length: 47.99 ms.
Best time for 8192K FFT length: 56.25 ms.
Best time for 58 bit trial factors: 3.58 ms.
Best time for 59 bit trial factors: 3.59 ms.
Best time for 60 bit trial factors: 3.56 ms.
Best time for 61 bit trial factors: 3.57 ms.
Best time for 62 bit trial factors: 3.59 ms.
Best time for 63 bit trial factors: 5.98 ms.
Best time for 64 bit trial factors: 5.96 ms.
Best time for 65 bit trial factors: 5.51 ms.
Best time for 66 bit trial factors: 5.46 ms.
Best time for 67 bit trial factors: 5.43 ms.

And at 3666MHz with memory at 1464/CL9

Code:

Intel(R) Core(TM) i5 CPU         750  @ 2.67GHz
CPU speed: 3660.04 MHz, 4 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 8 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 32-bit version 25.11, RdtscTiming=1
Best time for 768K FFT length: 10.35 ms.
Best time for 896K FFT length: 12.59 ms.
Best time for 1024K FFT length: 14.33 ms.
Best time for 1280K FFT length: 17.93 ms.
Best time for 1536K FFT length: 21.39 ms.
Best time for 1792K FFT length: 26.13 ms.
Best time for 2048K FFT length: 29.56 ms.
Best time for 2560K FFT length: 39.15 ms.
Best time for 3072K FFT length: 47.41 ms.
Best time for 3584K FFT length: 57.93 ms.
Best time for 4096K FFT length: 65.52 ms.
Best time for 5120K FFT length: 83.85 ms.
Best time for 6144K FFT length: 99.84 ms.
Best time for 7168K FFT length: 121.42 ms.
Best time for 8192K FFT length: 136.35 ms.
Timing FFTs using 2 threads.
Best time for 768K FFT length: 5.44 ms.
Best time for 896K FFT length: 6.57 ms.
Best time for 1024K FFT length: 7.67 ms.
Best time for 1280K FFT length: 9.36 ms.
Best time for 1536K FFT length: 11.25 ms.
Best time for 1792K FFT length: 13.68 ms.
Best time for 2048K FFT length: 15.57 ms.
Best time for 2560K FFT length: 20.30 ms.
Best time for 3072K FFT length: 24.37 ms.
Best time for 3584K FFT length: 29.75 ms.
Best time for 4096K FFT length: 33.64 ms.
Best time for 5120K FFT length: 43.27 ms.
Best time for 6144K FFT length: 51.29 ms.
Best time for 7168K FFT length: 62.47 ms.
Best time for 8192K FFT length: 70.48 ms.
Timing FFTs using 3 threads.
Best time for 768K FFT length: 4.25 ms.
Best time for 896K FFT length: 4.83 ms.
Best time for 1024K FFT length: 6.47 ms.
Best time for 1280K FFT length: 6.35 ms.
Best time for 1536K FFT length: 7.58 ms.
Best time for 1792K FFT length: 9.28 ms.
Best time for 2048K FFT length: 10.45 ms.
Best time for 2560K FFT length: 13.74 ms.
Best time for 3072K FFT length: 16.62 ms.
Best time for 3584K FFT length: 20.32 ms.
Best time for 4096K FFT length: 23.01 ms.
Best time for 5120K FFT length: 29.85 ms.
Best time for 6144K FFT length: 35.38 ms.
Best time for 7168K FFT length: 44.97 ms.
Best time for 8192K FFT length: 51.61 ms.
Timing FFTs using 4 threads.
Best time for 768K FFT length: 3.79 ms.
Best time for 896K FFT length: 4.31 ms.
Best time for 1024K FFT length: 5.76 ms.
Best time for 1280K FFT length: 5.23 ms.
Best time for 1536K FFT length: 6.19 ms.
Best time for 1792K FFT length: 7.11 ms.
Best time for 2048K FFT length: 8.08 ms.
Best time for 2560K FFT length: 10.46 ms.
Best time for 3072K FFT length: 12.74 ms.
Best time for 3584K FFT length: 15.56 ms.
Best time for 4096K FFT length: 17.52 ms.
Best time for 5120K FFT length: 22.60 ms.
Best time for 6144K FFT length: 27.91 ms.
Best time for 7168K FFT length: 35.09 ms.
Best time for 8192K FFT length: 41.31 ms.
Best time for 58 bit trial factors: 2.66 ms.
Best time for 59 bit trial factors: 2.66 ms.
Best time for 60 bit trial factors: 2.67 ms.
Best time for 61 bit trial factors: 2.66 ms.
Best time for 62 bit trial factors: 2.67 ms.
Best time for 63 bit trial factors: 4.48 ms.
Best time for 64 bit trial factors: 4.47 ms.
Best time for 65 bit trial factors: 4.11 ms.
Best time for 66 bit trial factors: 4.09 ms.
Best time for 67 bit trial factors: 4.08 ms.

S485122 · 2009-11-18, 06:44

Quote:

Originally Posted by lycorn

As we have been made aware by many benchmarks already posted in this forum, Prime 95 doesn´t scale very well as the number of threads per test goes up. That´s an established fact.

Looking at Garo's benchmark that seems not to be true any more with Intel's i5 (and i7) architecture that seems to have the necessary memory bandwidth : the slowdown for 4 threads is less than 10 % for FFT sizes from 1792 KB to 5120 KB.

But I agree that benchmarks with 4 different tests in parallel would be very interesting and would probably suffer less from inter core communication bottlenecks.

Jacob

ddrcoder · 2009-12-07, 08:41

Code:

Intel(R) Core(TM) i7 CPU         920  @ 2.67GHz
CPU speed: 4000.57 MHz, 8 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 8 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 64-bit version 25.11, RdtscTiming=1
Best time for 768K FFT length: 9.266 ms.
Best time for 896K FFT length: 11.204 ms.
Best time for 1024K FFT length: 12.638 ms.
Best time for 1280K FFT length: 15.924 ms.
Best time for 1536K FFT length: 19.222 ms.
Best time for 1792K FFT length: 23.175 ms.
Best time for 2048K FFT length: 26.320 ms.
Best time for 2560K FFT length: 34.907 ms.
Best time for 3072K FFT length: 42.681 ms.
Best time for 3584K FFT length: 53.006 ms.
Best time for 4096K FFT length: 60.267 ms.
Best time for 5120K FFT length: 78.897 ms.
Best time for 6144K FFT length: 95.181 ms.
Best time for 7168K FFT length: 113.431 ms.
Best time for 8192K FFT length: 126.381 ms.
Timing FFTs using 2 threads.
Best time for 768K FFT length: 9.518 ms.
Best time for 896K FFT length: 11.626 ms.
Best time for 1024K FFT length: 13.199 ms.
Best time for 1280K FFT length: 16.694 ms.
Best time for 1536K FFT length: 19.680 ms.
Best time for 1792K FFT length: 24.364 ms.
Best time for 2048K FFT length: 26.707 ms.
Best time for 2560K FFT length: 36.093 ms.
Best time for 3072K FFT length: 43.220 ms.
Best time for 3584K FFT length: 53.049 ms.
Best time for 4096K FFT length: 59.357 ms.
Best time for 5120K FFT length: 76.321 ms.
Best time for 6144K FFT length: 90.497 ms.
Best time for 7168K FFT length: 110.513 ms.
Best time for 8192K FFT length: 124.799 ms.
Timing FFTs using 3 threads.
Best time for 768K FFT length: 5.686 ms.
Best time for 896K FFT length: 6.757 ms.
Best time for 1024K FFT length: 8.336 ms.
Best time for 1280K FFT length: 9.638 ms.
Best time for 1536K FFT length: 11.501 ms.
Best time for 1792K FFT length: 14.196 ms.
Best time for 2048K FFT length: 15.756 ms.
Best time for 2560K FFT length: 21.240 ms.
Best time for 3072K FFT length: 25.777 ms.
Best time for 3584K FFT length: 32.232 ms.
Best time for 4096K FFT length: 35.000 ms.
Best time for 5120K FFT length: 47.109 ms.
Best time for 6144K FFT length: 55.998 ms.
Best time for 7168K FFT length: 69.900 ms.
Best time for 8192K FFT length: 75.467 ms.
Timing FFTs using 4 threads.
Best time for 768K FFT length: 5.499 ms.
Best time for 896K FFT length: 6.288 ms.
Best time for 1024K FFT length: 7.887 ms.
Best time for 1280K FFT length: 8.578 ms.
Best time for 1536K FFT length: 10.335 ms.
Best time for 1792K FFT length: 12.518 ms.
Best time for 2048K FFT length: 14.224 ms.
Best time for 2560K FFT length: 18.826 ms.
Best time for 3072K FFT length: 22.426 ms.
Best time for 3584K FFT length: 27.961 ms.
Best time for 4096K FFT length: 30.933 ms.
Best time for 5120K FFT length: 39.876 ms.
Best time for 6144K FFT length: 47.999 ms.
Best time for 7168K FFT length: 57.854 ms.
Best time for 8192K FFT length: 66.055 ms.
Timing FFTs using 5 threads.
Best time for 768K FFT length: 4.488 ms.
Best time for 896K FFT length: 5.160 ms.
Best time for 1024K FFT length: 6.623 ms.
Best time for 1280K FFT length: 6.668 ms.
Best time for 1536K FFT length: 8.123 ms.
Best time for 1792K FFT length: 9.596 ms.
Best time for 2048K FFT length: 10.578 ms.
Best time for 2560K FFT length: 13.718 ms.
Best time for 3072K FFT length: 18.062 ms.
Best time for 3584K FFT length: 21.984 ms.
Best time for 4096K FFT length: 24.084 ms.
Best time for 5120K FFT length: 30.709 ms.
Best time for 6144K FFT length: 38.574 ms.
Best time for 7168K FFT length: 47.016 ms.
Best time for 8192K FFT length: 51.522 ms.
Timing FFTs using 6 threads.
Best time for 768K FFT length: 4.656 ms.
Best time for 896K FFT length: 5.373 ms.
Best time for 1024K FFT length: 6.885 ms.
Best time for 1280K FFT length: 7.006 ms.
Best time for 1536K FFT length: 8.338 ms.
Best time for 1792K FFT length: 9.744 ms.
Best time for 2048K FFT length: 11.020 ms.
Best time for 2560K FFT length: 14.579 ms.
Best time for 3072K FFT length: 17.405 ms.
Best time for 3584K FFT length: 19.175 ms.
Best time for 4096K FFT length: 22.716 ms.
Best time for 5120K FFT length: 29.786 ms.
Best time for 6144K FFT length: 38.219 ms.
Best time for 7168K FFT length: 43.411 ms.
Best time for 8192K FFT length: 51.469 ms.
Timing FFTs using 7 threads.
Best time for 768K FFT length: 4.078 ms.
Best time for 896K FFT length: 4.689 ms.
Best time for 1024K FFT length: 6.161 ms.
Best time for 1280K FFT length: 6.172 ms.
Best time for 1536K FFT length: 7.292 ms.
Best time for 1792K FFT length: 8.919 ms.
Best time for 2048K FFT length: 10.716 ms.
Best time for 2560K FFT length: 12.957 ms.
Best time for 3072K FFT length: 17.096 ms.
Best time for 3584K FFT length: 19.252 ms.
Best time for 4096K FFT length: 22.945 ms.
Best time for 5120K FFT length: 28.873 ms.
Best time for 6144K FFT length: 35.850 ms.
Best time for 7168K FFT length: 42.036 ms.
Best time for 8192K FFT length: 50.448 ms.
Timing FFTs using 8 threads.
Best time for 768K FFT length: 4.302 ms.
Best time for 896K FFT length: 5.028 ms.
Best time for 1024K FFT length: 7.563 ms.
Best time for 1280K FFT length: 6.492 ms.
Best time for 1536K FFT length: 8.089 ms.
Best time for 1792K FFT length: 9.137 ms.
Best time for 2048K FFT length: 10.814 ms.
Best time for 2560K FFT length: 14.614 ms.
Best time for 3072K FFT length: 17.795 ms.
Best time for 3584K FFT length: 18.635 ms.
Best time for 4096K FFT length: 22.511 ms.
Best time for 5120K FFT length: 27.932 ms.
Best time for 6144K FFT length: 35.777 ms.
Best time for 7168K FFT length: 45.743 ms.
Best time for 8192K FFT length: 49.979 ms.
Best time for 58 bit trial factors: 1.937 ms.
Best time for 59 bit trial factors: 1.963 ms.
Best time for 60 bit trial factors: 1.962 ms.
Best time for 61 bit trial factors: 2.166 ms.
Best time for 62 bit trial factors: 2.288 ms.
Best time for 63 bit trial factors: 2.705 ms.
Best time for 64 bit trial factors: 3.327 ms.
Best time for 65 bit trial factors: 3.504 ms.
Best time for 66 bit trial factors: 3.691 ms.
Best time for 67 bit trial factors: 3.665 ms.

ddrcoder · 2009-12-07, 08:46

I improved the ventilation a bit around the CPU, now it made it through the test without downclocking:

Code:

Intel(R) Core(TM) i7 CPU         920  @ 2.67GHz
CPU speed: 4000.24 MHz, 8 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 8 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 64-bit version 25.11, RdtscTiming=1
Best time for 768K FFT length: 9.247 ms.
Best time for 896K FFT length: 11.191 ms.
Best time for 1024K FFT length: 12.608 ms.
Best time for 1280K FFT length: 15.878 ms.
Best time for 1536K FFT length: 19.166 ms.
Best time for 1792K FFT length: 23.123 ms.
Best time for 2048K FFT length: 26.119 ms.
Best time for 2560K FFT length: 34.800 ms.
Best time for 3072K FFT length: 42.541 ms.
Best time for 3584K FFT length: 51.684 ms.
Best time for 4096K FFT length: 58.141 ms.
Best time for 5120K FFT length: 74.773 ms.
Best time for 6144K FFT length: 88.944 ms.
Best time for 7168K FFT length: 108.168 ms.
Best time for 8192K FFT length: 121.921 ms.
Timing FFTs using 2 threads.
Best time for 768K FFT length: 9.478 ms.
Best time for 896K FFT length: 11.564 ms.
Best time for 1024K FFT length: 13.002 ms.
Best time for 1280K FFT length: 16.511 ms.
Best time for 1536K FFT length: 19.684 ms.
Best time for 1792K FFT length: 24.132 ms.
Best time for 2048K FFT length: 26.784 ms.
Best time for 2560K FFT length: 35.635 ms.
Best time for 3072K FFT length: 42.333 ms.
Best time for 3584K FFT length: 51.944 ms.
Best time for 4096K FFT length: 57.433 ms.
Best time for 5120K FFT length: 74.338 ms.
Best time for 6144K FFT length: 88.665 ms.
Best time for 7168K FFT length: 107.472 ms.
Best time for 8192K FFT length: 119.232 ms.
Timing FFTs using 3 threads.
Best time for 768K FFT length: 5.586 ms.
Best time for 896K FFT length: 6.711 ms.
Best time for 1024K FFT length: 8.235 ms.
Best time for 1280K FFT length: 9.600 ms.
Best time for 1536K FFT length: 11.387 ms.
Best time for 1792K FFT length: 14.047 ms.
Best time for 2048K FFT length: 15.440 ms.
Best time for 2560K FFT length: 20.835 ms.
Best time for 3072K FFT length: 24.836 ms.
Best time for 3584K FFT length: 30.593 ms.
Best time for 4096K FFT length: 33.869 ms.
Best time for 5120K FFT length: 43.959 ms.
Best time for 6144K FFT length: 52.436 ms.
Best time for 7168K FFT length: 63.801 ms.
Best time for 8192K FFT length: 70.626 ms.
Timing FFTs using 4 threads.
Best time for 768K FFT length: 5.472 ms.
Best time for 896K FFT length: 6.303 ms.
Best time for 1024K FFT length: 7.866 ms.
Best time for 1280K FFT length: 8.577 ms.
Best time for 1536K FFT length: 10.323 ms.
Best time for 1792K FFT length: 12.427 ms.
Best time for 2048K FFT length: 13.874 ms.
Best time for 2560K FFT length: 18.216 ms.
Best time for 3072K FFT length: 21.769 ms.
Best time for 3584K FFT length: 26.342 ms.
Best time for 4096K FFT length: 29.446 ms.
Best time for 5120K FFT length: 37.931 ms.
Best time for 6144K FFT length: 45.583 ms.
Best time for 7168K FFT length: 55.053 ms.
Best time for 8192K FFT length: 61.405 ms.
Timing FFTs using 5 threads.
Best time for 768K FFT length: 4.440 ms.
Best time for 896K FFT length: 5.085 ms.
Best time for 1024K FFT length: 6.593 ms.
Best time for 1280K FFT length: 6.649 ms.
Best time for 1536K FFT length: 7.895 ms.
Best time for 1792K FFT length: 9.247 ms.
Best time for 2048K FFT length: 10.365 ms.
Best time for 2560K FFT length: 13.547 ms.
Best time for 3072K FFT length: 16.214 ms.
Best time for 3584K FFT length: 19.759 ms.
Best time for 4096K FFT length: 22.091 ms.
Best time for 5120K FFT length: 28.841 ms.
Best time for 6144K FFT length: 35.322 ms.
Best time for 7168K FFT length: 42.786 ms.
Best time for 8192K FFT length: 47.855 ms.
Timing FFTs using 6 threads.
Best time for 768K FFT length: 4.596 ms.
Best time for 896K FFT length: 5.310 ms.
Best time for 1024K FFT length: 6.823 ms.
Best time for 1280K FFT length: 6.919 ms.
Best time for 1536K FFT length: 8.274 ms.
Best time for 1792K FFT length: 9.625 ms.
Best time for 2048K FFT length: 10.901 ms.
Best time for 2560K FFT length: 13.528 ms.
Best time for 3072K FFT length: 16.194 ms.
Best time for 3584K FFT length: 18.895 ms.
Best time for 4096K FFT length: 21.474 ms.
Best time for 5120K FFT length: 26.673 ms.
Best time for 6144K FFT length: 34.034 ms.
Best time for 7168K FFT length: 40.747 ms.
Best time for 8192K FFT length: 46.290 ms.
Timing FFTs using 7 threads.
Best time for 768K FFT length: 4.149 ms.
Best time for 896K FFT length: 4.667 ms.
Best time for 1024K FFT length: 6.053 ms.
Best time for 1280K FFT length: 6.053 ms.
Best time for 1536K FFT length: 7.231 ms.
Best time for 1792K FFT length: 8.351 ms.
Best time for 2048K FFT length: 9.558 ms.
Best time for 2560K FFT length: 11.851 ms.
Best time for 3072K FFT length: 14.100 ms.
Best time for 3584K FFT length: 16.415 ms.
Best time for 4096K FFT length: 18.702 ms.
Best time for 5120K FFT length: 23.265 ms.
Best time for 6144K FFT length: 29.802 ms.
Best time for 7168K FFT length: 36.410 ms.
Best time for 8192K FFT length: 41.644 ms.
Timing FFTs using 8 threads.
Best time for 768K FFT length: 4.225 ms.
Best time for 896K FFT length: 4.860 ms.
Best time for 1024K FFT length: 6.253 ms.
Best time for 1280K FFT length: 6.313 ms.
Best time for 1536K FFT length: 7.613 ms.
Best time for 1792K FFT length: 8.712 ms.
Best time for 2048K FFT length: 10.017 ms.
Best time for 2560K FFT length: 12.383 ms.
Best time for 3072K FFT length: 14.907 ms.
Best time for 3584K FFT length: 17.200 ms.
Best time for 4096K FFT length: 19.694 ms.
Best time for 5120K FFT length: 24.571 ms.
Best time for 6144K FFT length: 30.808 ms.
Best time for 7168K FFT length: 37.385 ms.
Best time for 8192K FFT length: 43.127 ms.
Best time for 58 bit trial factors: 1.934 ms.
Best time for 59 bit trial factors: 1.956 ms.
Best time for 60 bit trial factors: 1.957 ms.
Best time for 61 bit trial factors: 2.159 ms.
Best time for 62 bit trial factors: 2.283 ms.
Best time for 63 bit trial factors: 2.698 ms.
Best time for 64 bit trial factors: 3.328 ms.
Best time for 65 bit trial factors: 3.512 ms.
Best time for 66 bit trial factors: 3.678 ms.
Best time for 67 bit trial factors: 3.651 ms.

R.D. Silverman · 2009-12-07, 12:30

Quote:

Originally Posted by S485122

Looking at Garo's benchmark that seems not to be true any more with Intel's i5 (and i7) architecture that seems to have the necessary memory bandwidth : the slowdown for 4 threads is less than 10 % for FFT sizes from 1792 KB to 5120 KB.

But I agree that benchmarks with 4 different tests in parallel would be very interesting and would probably suffer less from inter core communication bottlenecks.

Jacob

I just bought a new toy: an I7/920 with 12Gbytes.
This is a 4-core machine with HT @2.66GHz. I could have bought one
at 3.3Ghz, but the cost was 60% higher for only 25% more speed.
(another $600 for the i7/975)

I have benchmark data for SNFS with my current number: 2,1149-
The factor bases are each 2.8million ideals, the sieve region is 8K x 16K,
and the LP bound is 800Million (i.e. betweeen 29 and 30 bits)

The data given is the number of special-q's processed per minute.

1 core; 7.4
2 : 15
3 : 22
4 : 29
5 : 31.5
6 : 34
7 : 37
8 : 40

This is for code compiled as 32-bit code. I intend to recompile as 64-bit.
However, I am busy with 60 hour weeks on my real job, so this will take
a while.

starrynte · 2009-12-23, 01:14

Code:

[Mon Dec 21 11:46:07 2009]
Compare your results to other computers at http://www.mersenne.org/report_benchmarks
Intel(R) Core(TM) i5 CPU         750  @ 2.67GHz
CPU speed: 2660.19 MHz, 2 hyperthreaded cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 8 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 64-bit version 25.9, RdtscTiming=1
Best time for 768K FFT length: 11.604 ms.
Best time for 896K FFT length: 14.140 ms.
Best time for 1024K FFT length: 15.979 ms.
Best time for 1280K FFT length: 20.101 ms.
Best time for 1536K FFT length: 24.264 ms.
Best time for 1792K FFT length: 29.377 ms.
Best time for 2048K FFT length: 33.267 ms.
Best time for 2560K FFT length: 44.351 ms.
Best time for 3072K FFT length: 54.405 ms.
Best time for 3584K FFT length: 65.842 ms.
Best time for 4096K FFT length: 74.242 ms.
Best time for 5120K FFT length: 95.047 ms.
Best time for 6144K FFT length: 113.294 ms.
Best time for 7168K FFT length: 138.047 ms.
Best time for 8192K FFT length: 155.555 ms.
Timing FFTs using 2 threads on 1 physical CPUs.
Best time for 768K FFT length: 6.152 ms.
Best time for 896K FFT length: 7.403 ms.
Best time for 1024K FFT length: 8.465 ms.
Best time for 1280K FFT length: 10.617 ms.
Best time for 1536K FFT length: 12.875 ms.
Best time for 1792K FFT length: 15.602 ms.
Best time for 2048K FFT length: 17.595 ms.
Best time for 2560K FFT length: 23.082 ms.
Best time for 3072K FFT length: 27.964 ms.
Best time for 3584K FFT length: 33.929 ms.
Best time for 4096K FFT length: 38.249 ms.
Best time for 5120K FFT length: 49.172 ms.
Best time for 6144K FFT length: 59.253 ms.
Best time for 7168K FFT length: 73.083 ms.
Best time for 8192K FFT length: 82.076 ms.
Timing FFTs using 4 threads on 2 physical CPUs.
Best time for 768K FFT length: 4.839 ms.
Best time for 896K FFT length: 5.510 ms.
Best time for 1024K FFT length: 7.375 ms.
Best time for 1280K FFT length: 6.883 ms.
Best time for 1536K FFT length: 8.144 ms.
Best time for 1792K FFT length: 9.401 ms.
Best time for 2048K FFT length: 10.752 ms.
Best time for 2560K FFT length: 13.527 ms.
Best time for 3072K FFT length: 16.757 ms.
Best time for 3584K FFT length: 19.925 ms.
Best time for 4096K FFT length: 22.849 ms.
Best time for 5120K FFT length: 29.466 ms.
Best time for 6144K FFT length: 39.497 ms.
Best time for 7168K FFT length: 47.455 ms.
Best time for 8192K FFT length: 55.049 ms.
Best time for 58 bit trial factors: 2.428 ms.
Best time for 59 bit trial factors: 2.455 ms.
Best time for 60 bit trial factors: 2.479 ms.
Best time for 61 bit trial factors: 2.737 ms.
Best time for 62 bit trial factors: 2.877 ms.
Best time for 63 bit trial factors: 3.383 ms.
Best time for 64 bit trial factors: 4.177 ms.
Best time for 65 bit trial factors: 4.417 ms.
Best time for 66 bit trial factors: 4.626 ms.
Best time for 67 bit trial factors: 4.576 ms.

(Prime95 incorrectly thinks I have 2 hyperthreaded cores (actually 4 physical cores))
Note that the times for 1 and 2 threads may be faster than expected due to turbo boost

Mini-Geek · 2009-12-23, 03:54

Quote:

Originally Posted by starrynte

(Prime95 incorrectly thinks I have 2 hyperthreaded cores (actually 4 physical cores))

Here's a way to override it and make it know what the CPU really is: (from undoc.txt)

Code:

The program automatically computes the number of CPUs, hyperthreading, and speed.
This information is used to calculate how much work to get.
If the program did not correctly figure out your CPU information,
you can override the info in local.txt:
    NumCPUs=n
    CpuNumHyperthreads=1 or 2
    CpuSpeed=s
Where n is the number of physical CPUs or cores, not logical CPUs created by
hyperthreading. Choose 1 for non-hyperthreaded and 2 for hyperthreaded. Finally,
s is the speed in MHz.

(yes, I know there's a possibility that you already knew this, and were pointing it out as a bug needing fixing...just figured it might help)

hj47 · 2010-01-16, 03:29

Code:

[Sat Jan 16 14:23:00 2010]
Compare your results to other computers at http://www.mersenne.org/report_benchmarks
Intel(R) Core(TM) i5 CPU         750  @ 2.67GHz
CPU speed: 3200.00 MHz, 4 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 8 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 64-bit version 25.9, RdtscTiming=1
Best time for 768K FFT length: 11.587 ms.
Best time for 896K FFT length: 14.058 ms.
Best time for 1024K FFT length: 15.821 ms.
Best time for 1280K FFT length: 19.929 ms.
Best time for 1536K FFT length: 24.000 ms.
Best time for 1792K FFT length: 29.000 ms.
Best time for 2048K FFT length: 32.711 ms.
Best time for 2560K FFT length: 43.344 ms.
Best time for 3072K FFT length: 52.723 ms.
Best time for 3584K FFT length: 64.006 ms.
Best time for 4096K FFT length: 72.155 ms.
Best time for 5120K FFT length: 92.282 ms.
Best time for 6144K FFT length: 110.128 ms.
Best time for 7168K FFT length: 134.087 ms.
Best time for 8192K FFT length: 150.194 ms.
Timing FFTs using 2 threads.
Best time for 768K FFT length: 6.040 ms.
Best time for 896K FFT length: 7.331 ms.
Best time for 1024K FFT length: 8.382 ms.
Best time for 1280K FFT length: 10.397 ms.
Best time for 1536K FFT length: 12.526 ms.
Best time for 1792K FFT length: 15.116 ms.
Best time for 2048K FFT length: 17.055 ms.
Best time for 2560K FFT length: 22.350 ms.
Best time for 3072K FFT length: 27.049 ms.
Best time for 3584K FFT length: 32.737 ms.
Best time for 4096K FFT length: 36.823 ms.
Best time for 5120K FFT length: 47.122 ms.
Best time for 6144K FFT length: 56.323 ms.
Best time for 7168K FFT length: 68.502 ms.
Best time for 8192K FFT length: 76.710 ms.
Timing FFTs using 3 threads.
Best time for 768K FFT length: 4.719 ms.
Best time for 896K FFT length: 5.320 ms.
Best time for 1024K FFT length: 7.018 ms.
Best time for 1280K FFT length: 7.032 ms.
Best time for 1536K FFT length: 8.427 ms.
Best time for 1792K FFT length: 10.221 ms.
Best time for 2048K FFT length: 11.446 ms.
Best time for 2560K FFT length: 15.141 ms.
Best time for 3072K FFT length: 18.297 ms.
Best time for 3584K FFT length: 22.220 ms.
Best time for 4096K FFT length: 25.163 ms.
Best time for 5120K FFT length: 32.006 ms.
Best time for 6144K FFT length: 38.256 ms.
Best time for 7168K FFT length: 46.596 ms.
Best time for 8192K FFT length: 52.521 ms.
Timing FFTs using 4 threads.
Best time for 768K FFT length: 4.173 ms.
Best time for 896K FFT length: 4.696 ms.
Best time for 1024K FFT length: 6.224 ms.
Best time for 1280K FFT length: 5.876 ms.
Best time for 1536K FFT length: 7.000 ms.
Best time for 1792K FFT length: 8.099 ms.
Best time for 2048K FFT length: 9.215 ms.
Best time for 2560K FFT length: 11.506 ms.
Best time for 3072K FFT length: 13.909 ms.
Best time for 3584K FFT length: 16.817 ms.
Best time for 4096K FFT length: 18.955 ms.
Best time for 5120K FFT length: 24.315 ms.
Best time for 6144K FFT length: 29.556 ms.
Best time for 7168K FFT length: 36.312 ms.
Best time for 8192K FFT length: 41.955 ms.
Best time for 58 bit trial factors: 2.421 ms.
Best time for 59 bit trial factors: 2.451 ms.
Best time for 60 bit trial factors: 2.449 ms.
Best time for 61 bit trial factors: 2.731 ms.
Best time for 62 bit trial factors: 2.857 ms.
Best time for 63 bit trial factors: 3.371 ms.
Best time for 64 bit trial factors: 4.121 ms.
Best time for 65 bit trial factors: 4.396 ms.
Best time for 66 bit trial factors: 4.601 ms.
Best time for 67 bit trial factors: 4.569 ms.

hj47 · 2010-03-02, 05:24

Code:

 
[Tue Mar 02 16:19:45 2010]
Compare your results to other computers at http://www.mersenne.org/report_benchmarks
Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz
CPU speed: 3600.00 MHz, 4 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 8 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 64-bit version 25.9, RdtscTiming=1
Best time for 768K FFT length: 10.290 ms.
Best time for 896K FFT length: 12.511 ms.
Best time for 1024K FFT length: 14.059 ms.
Best time for 1280K FFT length: 17.697 ms.
Best time for 1536K FFT length: 21.340 ms.
Best time for 1792K FFT length: 25.805 ms.
Best time for 2048K FFT length: 29.111 ms.
Best time for 2560K FFT length: 38.653 ms.
Best time for 3072K FFT length: 47.120 ms.
Best time for 3584K FFT length: 57.132 ms.
Best time for 4096K FFT length: 64.416 ms.
Best time for 5120K FFT length: 82.394 ms.
Best time for 6144K FFT length: 98.321 ms.
Best time for 7168K FFT length: 119.650 ms.
Best time for 8192K FFT length: 134.385 ms.
Timing FFTs using 2 threads.
Best time for 768K FFT length: 5.376 ms.
Best time for 896K FFT length: 6.506 ms.
Best time for 1024K FFT length: 7.432 ms.
Best time for 1280K FFT length: 9.301 ms.
Best time for 1536K FFT length: 11.198 ms.
Best time for 1792K FFT length: 13.517 ms.
Best time for 2048K FFT length: 15.247 ms.
Best time for 2560K FFT length: 19.986 ms.
Best time for 3072K FFT length: 24.189 ms.
Best time for 3584K FFT length: 29.249 ms.
Best time for 4096K FFT length: 32.948 ms.
Best time for 5120K FFT length: 42.181 ms.
Best time for 6144K FFT length: 50.503 ms.
Best time for 7168K FFT length: 61.683 ms.
Best time for 8192K FFT length: 68.924 ms.
Timing FFTs using 3 threads.
Best time for 768K FFT length: 4.212 ms.
Best time for 896K FFT length: 4.663 ms.
Best time for 1024K FFT length: 6.274 ms.
Best time for 1280K FFT length: 6.284 ms.
Best time for 1536K FFT length: 7.545 ms.
Best time for 1792K FFT length: 9.162 ms.
Best time for 2048K FFT length: 10.280 ms.
Best time for 2560K FFT length: 13.537 ms.
Best time for 3072K FFT length: 16.419 ms.
Best time for 3584K FFT length: 19.979 ms.
Best time for 4096K FFT length: 22.601 ms.
Best time for 5120K FFT length: 28.552 ms.
Best time for 6144K FFT length: 36.026 ms.
Best time for 7168K FFT length: 42.251 ms.
Best time for 8192K FFT length: 47.758 ms.
Timing FFTs using 4 threads.
Best time for 768K FFT length: 3.719 ms.
Best time for 896K FFT length: 4.191 ms.
Best time for 1024K FFT length: 5.551 ms.
Best time for 1280K FFT length: 5.250 ms.
Best time for 1536K FFT length: 6.272 ms.
Best time for 1792K FFT length: 7.238 ms.
Best time for 2048K FFT length: 8.231 ms.
Best time for 2560K FFT length: 10.318 ms.
Best time for 3072K FFT length: 12.519 ms.
Best time for 3584K FFT length: 15.104 ms.
Best time for 4096K FFT length: 17.038 ms.
Best time for 5120K FFT length: 21.903 ms.
Best time for 6144K FFT length: 27.059 ms.
Best time for 7168K FFT length: 33.409 ms.
Best time for 8192K FFT length: 39.547 ms.
Best time for 58 bit trial factors: 2.152 ms.
Best time for 59 bit trial factors: 2.177 ms.
Best time for 60 bit trial factors: 2.174 ms.
Best time for 61 bit trial factors: 2.426 ms.
Best time for 62 bit trial factors: 2.538 ms.
Best time for 63 bit trial factors: 2.995 ms.
Best time for 64 bit trial factors: 3.681 ms.
Best time for 65 bit trial factors: 3.903 ms.
Best time for 66 bit trial factors: 4.088 ms.
Best time for 67 bit trial factors: 4.059 ms.

petrw1 · 2010-03-15, 05:00

I just installed Prime95 on:

Code:

Software Version Windows,Prime95,v25.9,build 4 
Model AMD Athlon Dual-Core QL-62 
Features Dual core, Prefetch,3DNow!,SSE,SSE2 
Speed 1.999 GHz (1.765 GHz P4 effective equivalent) 
L1/L2 Cache 64 / 512 KB 
Computer Memory 2814 MB   configured usage 1000 MB day / 1000 MB night 
--- it has 3 GB of RAM

I started with Worker 1: P-1; Worker 2: DC
The iterations times seemed high for a DC (0.130) so I ran a benchmark.
The results really surprised me.

With 1 core the numbers seemed low: i.e. 63 Ms for 1280 FFT
But when it went to 1 core/1 helper it got very weird: the iterations time went up by about 40% to about 80 ms for 1280FFT; and every other FFT below 7K (at which time they were slightly better than 1 core).

So I changed both cores to DC. With only 1 worker active running DC I was getting iterations times of about 70 ms. When the second DC worker started both iterations times dropped to 132 ms.

Task manager showed Prime95 consistently in the 98-99% range.

Any thoughts? Anyone help?

lycorn · 2010-03-15, 08:32

The QL-62 works with DDR2-667 (333 MHz Bus speed). It´s not much in terms of mem bandwith. I would say that might be the limiting factor in the benchies you posted. The way the numbers vary suggests some memory access congestion.

petrw1 · 2010-03-15, 14:31

Quote:

Originally Posted by lycorn

The QL-62 works with DDR2-667 (333 MHz Bus speed). It´s not much in terms of mem bandwith. I would say that might be the limiting factor in the benchies you posted. The way the numbers vary suggests some memory access congestion.

I just looked and there are 6 other benchmarks for the QL-62 are very close to mine ... that tells me this PC is working as expected and that it probably does NOT have a significant issue with spyware, viruses or overheating.

So maybe it is only/best suited for TF?

lycorn · 2010-03-15, 23:46

Try one core DC and one core TF.

petrw1 · 2010-04-06, 20:10

One the benchmark page there is a "Delete?" column but no corresponding "Delete" button or option.

Am I missing something OR is this feature not fully implemented yet?

lfm · 2010-04-07, 06:06

Quote:

Originally Posted by petrw1

One the benchmark page there is a "Delete?" column but no corresponding "Delete" button or option.

Am I missing something OR is this feature not fully implemented yet?

Ya, its implemented at a deeper level somewhere, I was confused by this at first too. The top level delete check boxes are non-functional.

retina · 2010-04-07, 06:17

Quote:

Originally Posted by lycorn

... Prime 95 doesn´t scale very well as the number of threads per test goes up.

Except for the i5, which scales very well up to at least 4 threads.

Quote:

Originally Posted by lycorn

That´s an established fact.

Okay.

Ethan (EO) · 2010-04-09, 08:30

Fry's was running an amazing deal last weekend -- an i3 540 _and_ a Gigabyte GA-H55-S2H motherboard for $99! This setup _really_ sips the juice. 50w at the wall at idle; <100w at the wall running two cores of Prime95 at stock speeds!!

First, at all stock settings (3067Mhz, DDR3 @ 1333 7-8-7-20):

Code:

Intel(R) Core(TM) i3 CPU         540  @ 3.07GHz
CPU speed: 3066.52 MHz, 2 hyperthreaded cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 4 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 64-bit version 25.11, RdtscTiming=1
Best time for 768K FFT length: 12.387 ms.
Best time for 896K FFT length: 14.989 ms.
Best time for 1024K FFT length: 16.901 ms.
Best time for 1280K FFT length: 21.208 ms.
Best time for 1536K FFT length: 25.692 ms.
Best time for 1792K FFT length: 31.144 ms.
Best time for 2048K FFT length: 35.157 ms.
Best time for 2560K FFT length: 46.960 ms.
Best time for 3072K FFT length: 57.195 ms.
Best time for 3584K FFT length: 69.764 ms.
Best time for 4096K FFT length: 78.350 ms.
Best time for 5120K FFT length: 100.083 ms.
Best time for 6144K FFT length: 119.215 ms.
Best time for 7168K FFT length: 145.379 ms.
Best time for 8192K FFT length: 163.474 ms.
Timing FFTs using 2 threads on 1 physical CPUs.
Best time for 768K FFT length: 12.583 ms.
Best time for 896K FFT length: 15.453 ms.
Best time for 1024K FFT length: 17.371 ms.
Best time for 1280K FFT length: 21.802 ms.
Best time for 1536K FFT length: 25.980 ms.
Best time for 1792K FFT length: 31.744 ms.
Best time for 2048K FFT length: 35.155 ms.
Best time for 2560K FFT length: 47.096 ms.
Best time for 3072K FFT length: 56.008 ms.
Best time for 3584K FFT length: 68.516 ms.
Best time for 4096K FFT length: 76.166 ms.
Best time for 5120K FFT length: 98.975 ms.
Best time for 6144K FFT length: 117.275 ms.
Best time for 7168K FFT length: 142.850 ms.
Best time for 8192K FFT length: 158.081 ms.
Timing FFTs using 4 threads on 2 physical CPUs.
Best time for 768K FFT length: 7.450 ms.
Best time for 896K FFT length: 8.471 ms.
Best time for 1024K FFT length: 10.633 ms.
Best time for 1280K FFT length: 11.381 ms.
Best time for 1536K FFT length: 13.620 ms.
Best time for 1792K FFT length: 16.463 ms.
Best time for 2048K FFT length: 18.384 ms.
Best time for 2560K FFT length: 24.125 ms.
Best time for 3072K FFT length: 28.849 ms.
Best time for 3584K FFT length: 35.145 ms.
Best time for 4096K FFT length: 39.371 ms.
Best time for 5120K FFT length: 50.950 ms.
Best time for 6144K FFT length: 61.788 ms.
Best time for 7168K FFT length: 74.383 ms.
Best time for 8192K FFT length: 83.557 ms.
Best time for 58 bit trial factors: 2.516 ms.
Best time for 59 bit trial factors: 2.556 ms.
Best time for 60 bit trial factors: 2.550 ms.
Best time for 61 bit trial factors: 2.886 ms.
Best time for 62 bit trial factors: 2.996 ms.
Best time for 63 bit trial factors: 3.531 ms.
Best time for 64 bit trial factors: 4.202 ms.
Best time for 65 bit trial factors: 4.595 ms.
Best time for 66 bit trial factors: 4.808 ms.
Best time for 67 bit trial factors: 4.769 ms.

To get the memory running at its rated speed, I needed to bump the processor to 3817Mhz:

Code:

Intel(R) Core(TM) i3 CPU         540  @ 3.07GHz
CPU speed: 3817.86 MHz, 2 hyperthreaded cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 4 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 64-bit version 25.11, RdtscTiming=1
Best time for 768K FFT length: 9.963 ms.
Best time for 896K FFT length: 12.072 ms.
Best time for 1024K FFT length: 13.597 ms.
Best time for 1280K FFT length: 17.072 ms.
Best time for 1536K FFT length: 20.644 ms.
Best time for 1792K FFT length: 25.015 ms.
Best time for 2048K FFT length: 28.244 ms.
Best time for 2560K FFT length: 37.690 ms.
Best time for 3072K FFT length: 45.874 ms.
Best time for 3584K FFT length: 55.708 ms.
Best time for 4096K FFT length: 62.867 ms.
Best time for 5120K FFT length: 80.396 ms.
Best time for 6144K FFT length: 95.853 ms.
Best time for 7168K FFT length: 119.901 ms.
Best time for 8192K FFT length: 131.654 ms.
Timing FFTs using 2 threads on 1 physical CPUs.
Best time for 768K FFT length: 10.064 ms.
Best time for 896K FFT length: 12.252 ms.
Best time for 1024K FFT length: 13.813 ms.
Best time for 1280K FFT length: 17.482 ms.
Best time for 1536K FFT length: 20.762 ms.
Best time for 1792K FFT length: 25.530 ms.
Best time for 2048K FFT length: 28.206 ms.
Best time for 2560K FFT length: 37.582 ms.
Best time for 3072K FFT length: 44.860 ms.
Best time for 3584K FFT length: 54.902 ms.
Best time for 4096K FFT length: 61.184 ms.
Best time for 5120K FFT length: 79.222 ms.
Best time for 6144K FFT length: 94.493 ms.
Best time for 7168K FFT length: 113.965 ms.
Best time for 8192K FFT length: 126.755 ms.
Timing FFTs using 4 threads on 2 physical CPUs.
Best time for 768K FFT length: 5.975 ms.
Best time for 896K FFT length: 6.798 ms.
Best time for 1024K FFT length: 8.534 ms.
Best time for 1280K FFT length: 9.124 ms.
Best time for 1536K FFT length: 10.930 ms.
Best time for 1792K FFT length: 13.218 ms.
Best time for 2048K FFT length: 14.702 ms.
Best time for 2560K FFT length: 19.393 ms.
Best time for 3072K FFT length: 23.332 ms.
Best time for 3584K FFT length: 28.273 ms.
Best time for 4096K FFT length: 31.663 ms.
Best time for 5120K FFT length: 40.983 ms.
Best time for 6144K FFT length: 49.574 ms.
Best time for 7168K FFT length: 59.864 ms.
Best time for 8192K FFT length: 68.706 ms.
Best time for 58 bit trial factors: 2.021 ms.
Best time for 59 bit trial factors: 2.055 ms.
Best time for 60 bit trial factors: 2.048 ms.
Best time for 61 bit trial factors: 2.315 ms.
Best time for 62 bit trial factors: 2.406 ms.
Best time for 63 bit trial factors: 2.836 ms.
Best time for 64 bit trial factors: 3.468 ms.
Best time for 65 bit trial factors: 3.676 ms.
Best time for 66 bit trial factors: 3.847 ms.
Best time for 67 bit trial factors: 3.817 ms.

Then I took it up a little further to 4645...

Code:

Intel(R) Core(TM) i3 CPU         540  @ 3.07GHz
CPU speed: 4645.97 MHz, 2 hyperthreaded cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 4 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 64-bit version 25.11, RdtscTiming=1
Best time for 768K FFT length: 8.244 ms.
Best time for 896K FFT length: 9.962 ms.
Best time for 1024K FFT length: 11.250 ms.
Best time for 1280K FFT length: 14.105 ms.
Best time for 1536K FFT length: 17.059 ms.
Best time for 1792K FFT length: 20.669 ms.
Best time for 2048K FFT length: 23.360 ms.
Best time for 2560K FFT length: 31.158 ms.
Best time for 3072K FFT length: 37.964 ms.
Best time for 3584K FFT length: 46.022 ms.
Best time for 4096K FFT length: 51.934 ms.
Best time for 5120K FFT length: 66.343 ms.
Best time for 6144K FFT length: 78.983 ms.
Best time for 7168K FFT length: 96.337 ms.
Best time for 8192K FFT length: 108.433 ms.
Timing FFTs using 2 threads on 1 physical CPUs.
Best time for 768K FFT length: 8.312 ms.
Best time for 896K FFT length: 10.092 ms.
Best time for 1024K FFT length: 11.337 ms.
Best time for 1280K FFT length: 14.378 ms.
Best time for 1536K FFT length: 17.124 ms.
Best time for 1792K FFT length: 20.984 ms.
Best time for 2048K FFT length: 23.187 ms.
Best time for 2560K FFT length: 30.812 ms.
Best time for 3072K FFT length: 36.981 ms.
Best time for 3584K FFT length: 45.192 ms.
Best time for 4096K FFT length: 50.635 ms.
Best time for 5120K FFT length: 65.189 ms.
Best time for 6144K FFT length: 77.511 ms.
Best time for 7168K FFT length: 94.302 ms.
Best time for 8192K FFT length: 104.387 ms.
Timing FFTs using 4 threads on 2 physical CPUs.
Best time for 768K FFT length: 4.927 ms.
Best time for 896K FFT length: 5.597 ms.
Best time for 1024K FFT length: 7.007 ms.
Best time for 1280K FFT length: 7.558 ms.
Best time for 1536K FFT length: 9.042 ms.
Best time for 1792K FFT length: 10.883 ms.
Best time for 2048K FFT length: 12.197 ms.
Best time for 2560K FFT length: 16.082 ms.
Best time for 3072K FFT length: 19.276 ms.
Best time for 3584K FFT length: 23.334 ms.
Best time for 4096K FFT length: 26.027 ms.
Best time for 5120K FFT length: 33.742 ms.
Best time for 6144K FFT length: 40.830 ms.
Best time for 7168K FFT length: 49.336 ms.
Best time for 8192K FFT length: 55.707 ms.
Best time for 58 bit trial factors: 1.661 ms.
Best time for 59 bit trial factors: 1.686 ms.
Best time for 60 bit trial factors: 1.683 ms.
Best time for 61 bit trial factors: 1.902 ms.
Best time for 62 bit trial factors: 1.977 ms.
Best time for 63 bit trial factors: 2.330 ms.
Best time for 64 bit trial factors: 2.866 ms.
Best time for 65 bit trial factors: 3.024 ms.
Best time for 66 bit trial factors: 3.162 ms.
Best time for 67 bit trial factors: 3.137 ms.

I'll be running it close to stock for any submitted results, of course.

Ethan (EO) · 2010-04-09, 08:35

This last result wouldn't fit under the 10000 character (or is it word?) limit on the last post, and I don't think it really counts anyway. I only made it through the single-threaded test :)

Code:

Intel(R) Core(TM) i3 CPU         540  @ 3.07GHz
CPU speed: 4806.96 MHz, 2 hyperthreaded cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 4 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 64-bit version 25.11, RdtscTiming=1
Best time for 768K FFT length: 7.973 ms.
Best time for 896K FFT length: 9.636 ms.
Best time for 1024K FFT length: 10.882 ms.
Best time for 1280K FFT length: 13.642 ms.
Best time for 1536K FFT length: 16.522 ms.
Best time for 1792K FFT length: 19.998 ms.
Best time for 2048K FFT length: 22.618 ms.
Best time for 2560K FFT length: 30.160 ms.
Best time for 3072K FFT length: 36.656 ms.
Best time for 3584K FFT length: 44.493 ms.
Best time for 4096K FFT length: 50.223 ms.
Best time for 5120K FFT length: 64.158 ms.
Best time for 6144K FFT length: 76.345 ms.
Best time for 7168K FFT length: 93.079 ms.
Best time for 8192K FFT length: 104.826 ms.

< 8ms for 768k FFT length! If memory serves me, this is about 8000 times faster than my first GIMPS machine :D :D

henryzz · 2010-04-09, 15:57

Quote:

Originally Posted by Ethan (EO)

I'll be running it close to stock for any submitted results, of course.

As long as it is properly stable then the more overclocked the better.

satchvai · 2010-04-12, 02:24

Compare your results to other computers at http://www.mersenne.org/report_benchmarks
Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
CPU speed: 4010.23 MHz, 8 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 8 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 64-bit version 25.11, RdtscTiming=1
Best time for 768K FFT length: 8.748 ms.
Best time for 896K FFT length: 10.609 ms.
Best time for 1024K FFT length: 11.955 ms.
Best time for 1280K FFT length: 15.069 ms.
Best time for 1536K FFT length: 18.196 ms.
Best time for 1792K FFT length: 21.953 ms.
Best time for 2048K FFT length: 24.804 ms.
Best time for 2560K FFT length: 33.066 ms.
Best time for 3072K FFT length: 40.369 ms.
Best time for 3584K FFT length: 48.992 ms.
Best time for 4096K FFT length: 55.264 ms.
Best time for 5120K FFT length: 70.915 ms.
Best time for 6144K FFT length: 84.439 ms.
Best time for 7168K FFT length: 102.407 ms.
Best time for 8192K FFT length: 115.802 ms.
Timing FFTs using 2 threads.
Best time for 768K FFT length: 9.000 ms.
Best time for 896K FFT length: 10.978 ms.
Best time for 1024K FFT length: 12.365 ms.
Best time for 1280K FFT length: 15.738 ms.
Best time for 1536K FFT length: 18.689 ms.
Best time for 1792K FFT length: 22.990 ms.
Best time for 2048K FFT length: 25.284 ms.
Best time for 2560K FFT length: 33.789 ms.
Best time for 3072K FFT length: 40.301 ms.
Best time for 3584K FFT length: 49.153 ms.
Best time for 4096K FFT length: 54.548 ms.
Best time for 5120K FFT length: 70.452 ms.
Best time for 6144K FFT length: 84.298 ms.
[Sun Apr 11 22:16:12 2010]
Best time for 7168K FFT length: 101.948 ms.
Best time for 8192K FFT length: 112.960 ms.
Timing FFTs using 3 threads.
Best time for 768K FFT length: 5.325 ms.
Best time for 896K FFT length: 6.410 ms.
Best time for 1024K FFT length: 7.859 ms.
Best time for 1280K FFT length: 9.127 ms.
Best time for 1536K FFT length: 10.830 ms.
Best time for 1792K FFT length: 13.346 ms.
Best time for 2048K FFT length: 14.706 ms.
Best time for 2560K FFT length: 19.739 ms.
Best time for 3072K FFT length: 23.589 ms.
Best time for 3584K FFT length: 29.010 ms.
Best time for 4096K FFT length: 32.161 ms.
Best time for 5120K FFT length: 41.749 ms.
Best time for 6144K FFT length: 49.773 ms.
Best time for 7168K FFT length: 60.770 ms.
Best time for 8192K FFT length: 67.212 ms.
Timing FFTs using 4 threads.
Best time for 768K FFT length: 5.239 ms.
Best time for 896K FFT length: 6.012 ms.
Best time for 1024K FFT length: 7.485 ms.
Best time for 1280K FFT length: 8.164 ms.
Best time for 1536K FFT length: 9.737 ms.
Best time for 1792K FFT length: 11.774 ms.
Best time for 2048K FFT length: 13.204 ms.
Best time for 2560K FFT length: 17.438 ms.
Best time for 3072K FFT length: 20.702 ms.
Best time for 3584K FFT length: 25.156 ms.
Best time for 4096K FFT length: 28.004 ms.
Best time for 5120K FFT length: 36.315 ms.
Best time for 6144K FFT length: 43.531 ms.
Best time for 7168K FFT length: 52.476 ms.
Best time for 8192K FFT length: 58.572 ms.
Timing FFTs using 5 threads.
Best time for 768K FFT length: 4.227 ms.
Best time for 896K FFT length: 4.897 ms.
Best time for 1024K FFT length: 6.268 ms.
Best time for 1280K FFT length: 6.327 ms.
Best time for 1536K FFT length: 7.528 ms.
Best time for 1792K FFT length: 8.753 ms.
Best time for 2048K FFT length: 9.929 ms.
Best time for 2560K FFT length: 12.952 ms.
Best time for 3072K FFT length: 15.537 ms.
Best time for 3584K FFT length: 18.795 ms.
Best time for 4096K FFT length: 21.202 ms.
Best time for 5120K FFT length: 27.590 ms.
Best time for 6144K FFT length: 33.947 ms.
Best time for 7168K FFT length: 41.614 ms.
Best time for 8192K FFT length: 46.205 ms.
Timing FFTs using 6 threads.
Best time for 768K FFT length: 4.374 ms.
Best time for 896K FFT length: 5.041 ms.
Best time for 1024K FFT length: 6.417 ms.
Best time for 1280K FFT length: 6.577 ms.
Best time for 1536K FFT length: 7.834 ms.
Best time for 1792K FFT length: 9.142 ms.
Best time for 2048K FFT length: 10.316 ms.
Best time for 2560K FFT length: 12.859 ms.
Best time for 3072K FFT length: 15.444 ms.
Best time for 3584K FFT length: 17.986 ms.
Best time for 4096K FFT length: 20.469 ms.
Best time for 5120K FFT length: 25.563 ms.
Best time for 6144K FFT length: 33.007 ms.
Best time for 7168K FFT length: 39.752 ms.
Best time for 8192K FFT length: 45.174 ms.
Timing FFTs using 7 threads.
Best time for 768K FFT length: 3.862 ms.
Best time for 896K FFT length: 4.428 ms.
Best time for 1024K FFT length: 5.757 ms.
Best time for 1280K FFT length: 5.785 ms.
Best time for 1536K FFT length: 6.906 ms.
Best time for 1792K FFT length: 7.948 ms.
Best time for 2048K FFT length: 9.040 ms.
Best time for 2560K FFT length: 11.260 ms.
Best time for 3072K FFT length: 13.422 ms.
Best time for 3584K FFT length: 15.612 ms.
Best time for 4096K FFT length: 17.833 ms.
Best time for 5120K FFT length: 22.291 ms.
Best time for 6144K FFT length: 29.035 ms.
Best time for 7168K FFT length: 35.325 ms.
Best time for 8192K FFT length: 40.729 ms.
Timing FFTs using 8 threads.
Best time for 768K FFT length: 4.046 ms.
Best time for 896K FFT length: 4.623 ms.
Best time for 1024K FFT length: 5.981 ms.
Best time for 1280K FFT length: 6.094 ms.
Best time for 1536K FFT length: 7.288 ms.
Best time for 1792K FFT length: 8.436 ms.
Best time for 2048K FFT length: 9.578 ms.
Best time for 2560K FFT length: 11.928 ms.
Best time for 3072K FFT length: 14.181 ms.
Best time for 3584K FFT length: 16.611 ms.
Best time for 4096K FFT length: 18.990 ms.
Best time for 5120K FFT length: 23.572 ms.
Best time for 6144K FFT length: 30.192 ms.
Best time for 7168K FFT length: 36.903 ms.
Best time for 8192K FFT length: 42.362 ms.
Best time for 58 bit trial factors: 1.839 ms.
Best time for 59 bit trial factors: 1.859 ms.
Best time for 60 bit trial factors: 1.858 ms.
Best time for 61 bit trial factors: 2.053 ms.
Best time for 62 bit trial factors: 2.170 ms.
Best time for 63 bit trial factors: 2.563 ms.
Best time for 64 bit trial factors: 3.076 ms.
Best time for 65 bit trial factors: 3.342 ms.
Best time for 66 bit trial factors: 3.496 ms.
Best time for 67 bit trial factors: 3.469 ms.

lavalamp · 2010-04-12, 17:49

That's mighty impressive to be stable at 4.2 GHz on air. What's your setup?

S485122 · 2010-04-12, 20:58

Quote:

Originally Posted by satchvai

Compare your results to other computers at http://www.mersenne.org/report_benchmarks
Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
CPU speed: 4010.23 MHz, 8 cores

Could you give it a try without hyperthreading ? From your data it seems there is a big overhead running with helper threads (multiple threads for one workunit.)

Jacob

satchvai · 2010-04-15, 15:24

Quote:

Originally Posted by lavalamp

That's mighty impressive to be stable at 4.2 GHz on air. What's your setup?

HAF 922 case
Prolimatech Megahelms cooler with Ultra Kaze fan attached.
Antec Spot cooler over Voltage regulators.
Artic Silver
EVGA X58 SLI 132-BL-E758-A1
i7 920 Vcore 1.31
She gets a little hot on Linx, temps run around 80 under full load but passes the stability test. idle temps are in the 42 range.

2009-11-14, 08:13	#501
moebius Jul 2009 Germany 1137₈ Posts	Phenom X4 955 BE @3.6 Ghz AMD Phenom(tm) II X4 955 Processor CPU speed: 3616.00 MHz, 4 cores CPU features: RDTSC, CMOV, Prefetch, 3DNow!, MMX, SSE, SSE2 L1 cache size: 64 KB L2 cache size: 512 KB, L3 cache size: 6 MB L1 cache line size: 64 bytes L2 cache line size: 64 bytes L1 TLBS: 48 L2 TLBS: 512 Prime95 32-bit version 25.9, RdtscTiming=1 Best time for 768K FFT length: 11.699 ms. Best time for 896K FFT length: 14.233 ms. Best time for 1024K FFT length: 16.163 ms. Best time for 1280K FFT length: 20.475 ms. Best time for 1536K FFT length: 24.505 ms. Best time for 1792K FFT length: 30.001 ms. Best time for 2048K FFT length: 33.958 ms. Best time for 2560K FFT length: 44.735 ms. Best time for 3072K FFT length: 53.441 ms. Best time for 3584K FFT length: 64.947 ms. Best time for 4096K FFT length: 73.566 ms. Best time for 5120K FFT length: 97.125 ms. Best time for 6144K FFT length: 122.152 ms. Best time for 7168K FFT length: 151.038 ms. Best time for 8192K FFT length: 172.531 ms. Timing FFTs using 2 threads. Best time for 768K FFT length: 8.468 ms. Best time for 896K FFT length: 10.997 ms. Best time for 1024K FFT length: 13.325 ms. Best time for 1280K FFT length: 15.862 ms. Best time for 1536K FFT length: 19.257 ms. Best time for 1792K FFT length: 22.824 ms. Best time for 2048K FFT length: 26.030 ms. Best time for 2560K FFT length: 34.687 ms. Best time for 3072K FFT length: 41.220 ms. Best time for 3584K FFT length: 48.786 ms. Best time for 4096K FFT length: 54.699 ms. Best time for 5120K FFT length: 54.464 ms. Best time for 6144K FFT length: 66.127 ms. Best time for 7168K FFT length: 79.969 ms. Best time for 8192K FFT length: 90.241 ms. Timing FFTs using 3 threads. Best time for 768K FFT length: 6.321 ms. Best time for 896K FFT length: 7.336 ms. Best time for 1024K FFT length: 8.395 ms. Best time for 1280K FFT length: 14.364 ms. Best time for 1536K FFT length: 16.925 ms. Best time for 1792K FFT length: 19.806 ms. Best time for 2048K FFT length: 22.407 ms. Best time for 2560K FFT length: 30.807 ms. Best time for 3072K FFT length: 36.088 ms. Best time for 3584K FFT length: 41.646 ms. Best time for 4096K FFT length: 46.496 ms. Best time for 5120K FFT length: 38.431 ms. Best time for 6144K FFT length: 46.875 ms. Best time for 7168K FFT length: 56.333 ms. Best time for 8192K FFT length: 63.816 ms. Timing FFTs using 4 threads. Best time for 768K FFT length: 5.813 ms. Best time for 896K FFT length: 7.073 ms. Best time for 1024K FFT length: 8.070 ms. Best time for 1280K FFT length: 13.518 ms. Best time for 1536K FFT length: 16.056 ms. Best time for 1792K FFT length: 19.021 ms. Best time for 2048K FFT length: 21.272 ms. Best time for 2560K FFT length: 29.128 ms. Best time for 3072K FFT length: 34.316 ms. Best time for 3584K FFT length: 39.276 ms. Best time for 4096K FFT length: 43.892 ms. Best time for 5120K FFT length: 32.375 ms. Best time for 6144K FFT length: 38.699 ms. Best time for 7168K FFT length: 46.024 ms. Best time for 8192K FFT length: 51.565 ms. Best time for 58 bit trial factors: 3.211 ms. Best time for 59 bit trial factors: 3.214 ms. Best time for 60 bit trial factors: 3.234 ms. Best time for 61 bit trial factors: 3.218 ms. Best time for 62 bit trial factors: 3.224 ms. Best time for 63 bit trial factors: 5.929 ms. Best time for 64 bit trial factors: 5.921 ms. Best time for 65 bit trial factors: 5.907 ms. Best time for 66 bit trial factors: 5.862 ms. Best time for 67 bit trial factors: 5.876 ms.

2009-11-16, 11:55	#502
lycorn "GIMFS" Sep 2002 Oeiras, Portugal 2×11×67 Posts	Suggestion As we have been made aware by many benchmarks already posted in this forum, Prime 95 doesn´t scale very well as the number of threads per test goes up. That´s an established fact. Now what would be interesting to post, in my opinion, is the per iteration times when the number of worker windows (each one single threaded) goes up. That gives a good indication of whether we should use a given multi core CPU just for LL work (one test per core). If the iteration times are getting real worse with more workers running, it is then probably better to switch on or two cores to TF, for example. As far as I could see, this type of benchmark hasn´t been posted much. I therefore suggest that we start posting this type of data, particularly for quad cores. Last fiddled with by lycorn on 2009-11-16 at 11:55

2010-03-15, 05:00	#512
petrw1 1976 Toyota Corona years forever! "Wayne" Nov 2006 Saskatchewan, Canada 3×5×313 Posts	VERY ODD results ... anyone have any suggestions? I just installed Prime95 on: Code: Software Version Windows,Prime95,v25.9,build 4 Model AMD Athlon Dual-Core QL-62 Features Dual core, Prefetch,3DNow!,SSE,SSE2 Speed 1.999 GHz (1.765 GHz P4 effective equivalent) L1/L2 Cache 64 / 512 KB Computer Memory 2814 MB configured usage 1000 MB day / 1000 MB night --- it has 3 GB of RAM I started with Worker 1: P-1; Worker 2: DC The iterations times seemed high for a DC (0.130) so I ran a benchmark. The results really surprised me. With 1 core the numbers seemed low: i.e. 63 Ms for 1280 FFT But when it went to 1 core/1 helper it got very weird: the iterations time went up by about 40% to about 80 ms for 1280FFT; and every other FFT below 7K (at which time they were slightly better than 1 core). So I changed both cores to DC. With only 1 worker active running DC I was getting iterations times of about 70 ms. When the second DC worker started both iterations times dropped to 132 ms. Task manager showed Prime95 consistently in the 98-99% range. Any thoughts? Anyone help?

2010-04-06, 20:10	#516
petrw1 1976 Toyota Corona years forever! "Wayne" Nov 2006 Saskatchewan, Canada 4695₁₀ Posts	Deleting benchmarks??? One the benchmark page there is a "Delete?" column but no corresponding "Delete" button or option. Am I missing something OR is this feature not fully implemented yet?

2010-04-12, 02:24	#522
satchvai Apr 2010 2² Posts	4.2Ghz i7 on Air Compare your results to other computers at http://www.mersenne.org/report_benchmarks Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz CPU speed: 4010.23 MHz, 8 cores CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4 L1 cache size: 32 KB L2 cache size: 256 KB, L3 cache size: 8 MB L1 cache line size: 64 bytes L2 cache line size: 64 bytes TLBS: 64 Prime95 64-bit version 25.11, RdtscTiming=1 Best time for 768K FFT length: 8.748 ms. Best time for 896K FFT length: 10.609 ms. Best time for 1024K FFT length: 11.955 ms. Best time for 1280K FFT length: 15.069 ms. Best time for 1536K FFT length: 18.196 ms. Best time for 1792K FFT length: 21.953 ms. Best time for 2048K FFT length: 24.804 ms. Best time for 2560K FFT length: 33.066 ms. Best time for 3072K FFT length: 40.369 ms. Best time for 3584K FFT length: 48.992 ms. Best time for 4096K FFT length: 55.264 ms. Best time for 5120K FFT length: 70.915 ms. Best time for 6144K FFT length: 84.439 ms. Best time for 7168K FFT length: 102.407 ms. Best time for 8192K FFT length: 115.802 ms. Timing FFTs using 2 threads. Best time for 768K FFT length: 9.000 ms. Best time for 896K FFT length: 10.978 ms. Best time for 1024K FFT length: 12.365 ms. Best time for 1280K FFT length: 15.738 ms. Best time for 1536K FFT length: 18.689 ms. Best time for 1792K FFT length: 22.990 ms. Best time for 2048K FFT length: 25.284 ms. Best time for 2560K FFT length: 33.789 ms. Best time for 3072K FFT length: 40.301 ms. Best time for 3584K FFT length: 49.153 ms. Best time for 4096K FFT length: 54.548 ms. Best time for 5120K FFT length: 70.452 ms. Best time for 6144K FFT length: 84.298 ms. [Sun Apr 11 22:16:12 2010] Best time for 7168K FFT length: 101.948 ms. Best time for 8192K FFT length: 112.960 ms. Timing FFTs using 3 threads. Best time for 768K FFT length: 5.325 ms. Best time for 896K FFT length: 6.410 ms. Best time for 1024K FFT length: 7.859 ms. Best time for 1280K FFT length: 9.127 ms. Best time for 1536K FFT length: 10.830 ms. Best time for 1792K FFT length: 13.346 ms. Best time for 2048K FFT length: 14.706 ms. Best time for 2560K FFT length: 19.739 ms. Best time for 3072K FFT length: 23.589 ms. Best time for 3584K FFT length: 29.010 ms. Best time for 4096K FFT length: 32.161 ms. Best time for 5120K FFT length: 41.749 ms. Best time for 6144K FFT length: 49.773 ms. Best time for 7168K FFT length: 60.770 ms. Best time for 8192K FFT length: 67.212 ms. Timing FFTs using 4 threads. Best time for 768K FFT length: 5.239 ms. Best time for 896K FFT length: 6.012 ms. Best time for 1024K FFT length: 7.485 ms. Best time for 1280K FFT length: 8.164 ms. Best time for 1536K FFT length: 9.737 ms. Best time for 1792K FFT length: 11.774 ms. Best time for 2048K FFT length: 13.204 ms. Best time for 2560K FFT length: 17.438 ms. Best time for 3072K FFT length: 20.702 ms. Best time for 3584K FFT length: 25.156 ms. Best time for 4096K FFT length: 28.004 ms. Best time for 5120K FFT length: 36.315 ms. Best time for 6144K FFT length: 43.531 ms. Best time for 7168K FFT length: 52.476 ms. Best time for 8192K FFT length: 58.572 ms. Timing FFTs using 5 threads. Best time for 768K FFT length: 4.227 ms. Best time for 896K FFT length: 4.897 ms. Best time for 1024K FFT length: 6.268 ms. Best time for 1280K FFT length: 6.327 ms. Best time for 1536K FFT length: 7.528 ms. Best time for 1792K FFT length: 8.753 ms. Best time for 2048K FFT length: 9.929 ms. Best time for 2560K FFT length: 12.952 ms. Best time for 3072K FFT length: 15.537 ms. Best time for 3584K FFT length: 18.795 ms. Best time for 4096K FFT length: 21.202 ms. Best time for 5120K FFT length: 27.590 ms. Best time for 6144K FFT length: 33.947 ms. Best time for 7168K FFT length: 41.614 ms. Best time for 8192K FFT length: 46.205 ms. Timing FFTs using 6 threads. Best time for 768K FFT length: 4.374 ms. Best time for 896K FFT length: 5.041 ms. Best time for 1024K FFT length: 6.417 ms. Best time for 1280K FFT length: 6.577 ms. Best time for 1536K FFT length: 7.834 ms. Best time for 1792K FFT length: 9.142 ms. Best time for 2048K FFT length: 10.316 ms. Best time for 2560K FFT length: 12.859 ms. Best time for 3072K FFT length: 15.444 ms. Best time for 3584K FFT length: 17.986 ms. Best time for 4096K FFT length: 20.469 ms. Best time for 5120K FFT length: 25.563 ms. Best time for 6144K FFT length: 33.007 ms. Best time for 7168K FFT length: 39.752 ms. Best time for 8192K FFT length: 45.174 ms. Timing FFTs using 7 threads. Best time for 768K FFT length: 3.862 ms. Best time for 896K FFT length: 4.428 ms. Best time for 1024K FFT length: 5.757 ms. Best time for 1280K FFT length: 5.785 ms. Best time for 1536K FFT length: 6.906 ms. Best time for 1792K FFT length: 7.948 ms. Best time for 2048K FFT length: 9.040 ms. Best time for 2560K FFT length: 11.260 ms. Best time for 3072K FFT length: 13.422 ms. Best time for 3584K FFT length: 15.612 ms. Best time for 4096K FFT length: 17.833 ms. Best time for 5120K FFT length: 22.291 ms. Best time for 6144K FFT length: 29.035 ms. Best time for 7168K FFT length: 35.325 ms. Best time for 8192K FFT length: 40.729 ms. Timing FFTs using 8 threads. Best time for 768K FFT length: 4.046 ms. Best time for 896K FFT length: 4.623 ms. Best time for 1024K FFT length: 5.981 ms. Best time for 1280K FFT length: 6.094 ms. Best time for 1536K FFT length: 7.288 ms. Best time for 1792K FFT length: 8.436 ms. Best time for 2048K FFT length: 9.578 ms. Best time for 2560K FFT length: 11.928 ms. Best time for 3072K FFT length: 14.181 ms. Best time for 3584K FFT length: 16.611 ms. Best time for 4096K FFT length: 18.990 ms. Best time for 5120K FFT length: 23.572 ms. Best time for 6144K FFT length: 30.192 ms. Best time for 7168K FFT length: 36.903 ms. Best time for 8192K FFT length: 42.362 ms. Best time for 58 bit trial factors: 1.839 ms. Best time for 59 bit trial factors: 1.859 ms. Best time for 60 bit trial factors: 1.858 ms. Best time for 61 bit trial factors: 2.053 ms. Best time for 62 bit trial factors: 2.170 ms. Best time for 63 bit trial factors: 2.563 ms. Best time for 64 bit trial factors: 3.076 ms. Best time for 65 bit trial factors: 3.342 ms. Best time for 66 bit trial factors: 3.496 ms. Best time for 67 bit trial factors: 3.469 ms.

2010-03-15, 08:32	#513
lycorn "GIMFS" Sep 2002 Oeiras, Portugal 5C2₁₆ Posts	The QL-62 works with DDR2-667 (333 MHz Bus speed). It´s not much in terms of mem bandwith. I would say that might be the limiting factor in the benchies you posted. The way the numbers vary suggests some memory access congestion.

2010-03-15, 23:46	#515
lycorn "GIMFS" Sep 2002 Oeiras, Portugal 2·11·67 Posts	Try one core DC and one core TF.

2010-04-12, 17:49	#523
lavalamp Oct 2007 Manchester, UK 23×59 Posts	That's mighty impressive to be stable at 4.2 GHz on air. What's your setup?

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