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2007-02-18, 23:29
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#276 |
Jan 2004
101012 Posts |
E6600 at 3.4 GHz
This is an E6600 over-clocked to 3.4 GHz and memory running at 756
Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz CPU speed: 3405.69 MHz CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2 L1 cache size: 32 KB L2 cache size: unknown L1 cache line size: 64 bytes L2 cache line size: unknown Prime95 32-bit version 24.14, RdtscTiming=1 Best time for 512K FFT length: 7.493 ms. Best time for 640K FFT length: 10.170 ms. Best time for 768K FFT length: 12.538 ms. Best time for 896K FFT length: 14.989 ms. Best time for 1024K FFT length: 16.598 ms. Best time for 1280K FFT length: 21.167 ms. Best time for 1536K FFT length: 25.817 ms. Best time for 1792K FFT length: 30.717 ms. Best time for 2048K FFT length: 34.153 ms. Best time for 2560K FFT length: 45.048 ms. Best time for 3072K FFT length: 54.910 ms. Best time for 3584K FFT length: 66.383 ms. Best time for 4096K FFT length: 74.366 ms. Best time for 58 bit trial factors: 3.260 ms. Best time for 59 bit trial factors: 3.305 ms. Best time for 60 bit trial factors: 3.292 ms. Best time for 61 bit trial factors: 3.281 ms. Best time for 62 bit trial factors: 5.236 ms. Best time for 63 bit trial factors: 5.240 ms. Best time for 64 bit trial factors: 5.020 ms. Best time for 65 bit trial factors: 4.987 ms. Best time for 66 bit trial factors: 4.989 ms. Best time for 67 bit trial factors: 4.966 ms. |
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2007-03-04, 00:37
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#277 |
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Sep 2002
23×3 Posts |
A64 X2 Brisbane 4000+
2x 512MB DDR2-RAM 345 MHz 4-4-4-12 MSI K9A Linux x86 Code:
AMD Athlon(tm) 64 X2 Dual Core Processor 4000+ CPU speed: 2758.66 MHz CPU features: RDTSC, CMOV, Prefetch, 3DNow!, MMX, SSE, SSE2 L1 cache size: 64 KB L2 cache size: 512 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes L1 TLBS: 32 L2 TLBS: 512 Prime95 32-bit version 24.14, RdtscTiming=1 Best time for 512K FFT length: 17.331 ms. Best time for 640K FFT length: 22.594 ms. Best time for 768K FFT length: 27.219 ms. Best time for 896K FFT length: 32.610 ms. Best time for 1024K FFT length: 37.174 ms. Best time for 1280K FFT length: 47.084 ms. Best time for 1536K FFT length: 56.963 ms. Best time for 1792K FFT length: 72.332 ms. Best time for 2048K FFT length: 78.394 ms. Best time for 2560K FFT length: 104.761 ms. Best time for 3072K FFT length: 127.795 ms. Best time for 3584K FFT length: 153.268 ms. Best time for 4096K FFT length: 174.397 ms. Best time for 58 bit trial factors: 4.128 ms. Best time for 59 bit trial factors: 4.127 ms. Best time for 60 bit trial factors: 4.123 ms. Best time for 61 bit trial factors: 4.130 ms. Best time for 62 bit trial factors: 7.792 ms. Best time for 63 bit trial factors: 7.799 ms. Best time for 64 bit trial factors: 10.101 ms. Best time for 65 bit trial factors: 9.983 ms. Best time for 66 bit trial factors: 10.029 ms. Best time for 67 bit trial factors: 9.947 ms. |
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2007-03-07, 18:56
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#278 |
Nov 2002
Anchorage, AK
3×7×17 Posts |
AMD Athlon(tm) 64 X2 Dual Core Processor 4000+
CPU speed: 2099.43 MHz CPU features: RDTSC, CMOV, Prefetch, 3DNow!, MMX, SSE, SSE2 L1 cache size: 64 KB L2 cache size: 512 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes L1 TLBS: 32 L2 TLBS: 512 Prime95 32-bit version 24.14, RdtscTiming=1 Best time for 512K FFT length: 22.858 ms. Best time for 640K FFT length: 29.512 ms. Best time for 768K FFT length: 35.708 ms. Best time for 896K FFT length: 42.833 ms. Best time for 1024K FFT length: 47.669 ms. Best time for 1280K FFT length: 60.634 ms. Best time for 1536K FFT length: 74.557 ms. Best time for 1792K FFT length: 90.509 ms. Best time for 2048K FFT length: 101.255 ms. Best time for 2560K FFT length: 134.332 ms. Best time for 3072K FFT length: 164.802 ms. Best time for 3584K FFT length: 199.418 ms. Best time for 4096K FFT length: 222.955 ms. Best time for 58 bit trial factors: 5.403 ms. Best time for 59 bit trial factors: 5.418 ms. Best time for 60 bit trial factors: 5.393 ms. Best time for 61 bit trial factors: 5.420 ms. Best time for 62 bit trial factors: 10.213 ms. Best time for 63 bit trial factors: 10.246 ms. Best time for 64 bit trial factors: 13.199 ms. Best time for 65 bit trial factors: 13.104 ms. Best time for 66 bit trial factors: 13.114 ms. Best time for 67 bit trial factors: 13.070 ms. |
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2007-03-10, 23:29
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#279 |
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Nov 2002
Anchorage, AK
3×7×17 Posts |
Mac Mini (Core Duo), 1.83GHz, 1GB RAM, BootCamp with XP Pro SP2:
Genuine Intel(R) CPU 1400 @ 1.83GHz CPU speed: 1833.18 MHz CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2 L1 cache size: 32 KB L2 cache size: 2048 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes TLBS: 128 Prime95 32-bit version 24.14, RdtscTiming=1 Best time for 512K FFT length: 35.640 ms. Best time for 640K FFT length: 46.507 ms. Best time for 768K FFT length: 56.932 ms. Best time for 896K FFT length: 68.323 ms. Best time for 1024K FFT length: 75.902 ms. Best time for 1280K FFT length: 96.399 ms. Best time for 1536K FFT length: 117.667 ms. Best time for 1792K FFT length: 141.649 ms. Best time for 2048K FFT length: 157.615 ms. Best time for 2560K FFT length: 204.498 ms. Best time for 3072K FFT length: 248.543 ms. Best time for 3584K FFT length: 298.513 ms. Best time for 4096K FFT length: 333.532 ms. Best time for 58 bit trial factors: 7.162 ms. Best time for 59 bit trial factors: 7.273 ms. Best time for 60 bit trial factors: 7.262 ms. Best time for 61 bit trial factors: 7.163 ms. Best time for 62 bit trial factors: 10.152 ms. Best time for 63 bit trial factors: 10.238 ms. Best time for 64 bit trial factors: 17.466 ms. Best time for 65 bit trial factors: 17.303 ms. Best time for 66 bit trial factors: 17.335 ms. Best time for 67 bit trial factors: 17.393 ms. |
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2007-03-10, 23:56
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#280 |
Mar 2007
1102 Posts |
E6600 OC'd to 3.2G
CPU falsely detected 3.6GHz by Prime95. CPU-Z gives the right 3.2GHz
E6600 L627B005 at 3200MHz (8x400) G.Skill F2-6400CL4-1GBPK at 1:1 4-4-4-12 Asus P5B-Deluxe WinXP-32 Core temps between 60-65C under maximum load. Code:
Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz CPU speed: 3599.98 MHz CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2 L1 cache size: 32 KB L2 cache size: unknown L1 cache line size: 64 bytes L2 cache line size: unknown Prime95 32-bit version 24.14, RdtscTiming=1 Best time for 512K FFT length: 7.948 ms. Best time for 640K FFT length: 10.768 ms. Best time for 768K FFT length: 13.249 ms. Best time for 896K FFT length: 15.855 ms. Best time for 1024K FFT length: 17.543 ms. Best time for 1280K FFT length: 22.340 ms. Best time for 1536K FFT length: 27.247 ms. Best time for 1792K FFT length: 32.355 ms. Best time for 2048K FFT length: 36.072 ms. Best time for 2560K FFT length: 47.538 ms. Best time for 3072K FFT length: 57.882 ms. Best time for 3584K FFT length: 70.023 ms. Best time for 4096K FFT length: 78.621 ms. Best time for 58 bit trial factors: 3.500 ms. Best time for 59 bit trial factors: 3.535 ms. Best time for 60 bit trial factors: 3.474 ms. Best time for 61 bit trial factors: 3.492 ms. Best time for 62 bit trial factors: 5.600 ms. Best time for 63 bit trial factors: 5.577 ms. Best time for 64 bit trial factors: 5.343 ms. Best time for 65 bit trial factors: 5.323 ms. Best time for 66 bit trial factors: 5.321 ms. Best time for 67 bit trial factors: 5.284 ms. |
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2007-03-15, 01:45
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#281 |
"James Heinrich"
May 2004
ex-Northern Ontario
65438 Posts |
AM2 3600+ (65nm), 2x512kB L2 cache, stock: 1900MHz
in various states of overclock: Code:
AMD Athlon(tm) 64 X2 Dual Core Processor 3600+ CPU speed: 1908.76 MHz CPU features: RDTSC, CMOV, Prefetch, 3DNow!, MMX, SSE, SSE2 L1 cache size: 64 KB L2 cache size: 512 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes L1 TLBS: 32 L2 TLBS: 512 Prime95 64-bit version 24.14, RdtscTiming=1 Best time for 4K FFT length: 0.123 ms. Best time for 5K FFT length: 0.171 ms. Best time for 6K FFT length: 0.214 ms. Best time for 7K FFT length: 0.267 ms. Best time for 8K FFT length: 0.295 ms. Best time for 10K FFT length: 0.367 ms. Best time for 12K FFT length: 0.441 ms. Best time for 14K FFT length: 0.532 ms. Best time for 16K FFT length: 0.583 ms. Best time for 20K FFT length: 0.803 ms. Best time for 24K FFT length: 0.992 ms. Best time for 28K FFT length: 1.161 ms. Best time for 32K FFT length: 1.298 ms. Best time for 40K FFT length: 1.823 ms. Best time for 48K FFT length: 2.266 ms. Best time for 56K FFT length: 2.520 ms. Best time for 64K FFT length: 3.022 ms. Best time for 80K FFT length: 3.944 ms. Best time for 96K FFT length: 4.540 ms. Best time for 112K FFT length: 5.503 ms. Best time for 128K FFT length: 6.008 ms. Best time for 160K FFT length: 7.193 ms. Best time for 192K FFT length: 8.728 ms. Best time for 224K FFT length: 10.557 ms. Best time for 256K FFT length: 11.643 ms. Best time for 320K FFT length: 14.942 ms. Best time for 384K FFT length: 18.460 ms. Best time for 448K FFT length: 22.411 ms. Best time for 512K FFT length: 24.936 ms. Best time for 640K FFT length: 32.156 ms. Best time for 768K FFT length: 39.009 ms. Best time for 896K FFT length: 46.816 ms. Best time for 1024K FFT length: 52.002 ms. Best time for 1280K FFT length: 66.161 ms. Best time for 1536K FFT length: 81.412 ms. Best time for 1792K FFT length: 98.720 ms. Best time for 2048K FFT length: 110.033 ms. Best time for 2560K FFT length: 146.075 ms. Best time for 3072K FFT length: 179.702 ms. Best time for 3584K FFT length: 217.220 ms. Best time for 4096K FFT length: 241.674 ms. Best time for 5120K FFT length: 324.814 ms. Best time for 6144K FFT length: 397.984 ms. Best time for 7168K FFT length: 485.538 ms. Best time for 8192K FFT length: 556.949 ms. Best time for 10240K FFT length: 704.845 ms. Best time for 12288K FFT length: 864.885 ms. Best time for 14336K FFT length: 1047.672 ms. Best time for 16384K FFT length: 1197.928 ms. Best time for 20480K FFT length: 1612.652 ms. Best time for 24576K FFT length: 2013.053 ms. Best time for 28672K FFT length: 2463.071 ms. Best time for 32768K FFT length: 2833.110 ms. Best time for 58 bit trial factors: 3.986 ms. Best time for 59 bit trial factors: 3.985 ms. Best time for 60 bit trial factors: 4.235 ms. Best time for 61 bit trial factors: 4.372 ms. Best time for 62 bit trial factors: 5.181 ms. Best time for 63 bit trial factors: 5.575 ms. Best time for 64 bit trial factors: 7.194 ms. Best time for 65 bit trial factors: 8.505 ms. Best time for 66 bit trial factors: 8.460 ms. Best time for 67 bit trial factors: 8.444 ms. AMD Athlon(tm) 64 X2 Dual Core Processor 3600+ CPU speed: 2090.03 MHz CPU features: RDTSC, CMOV, Prefetch, 3DNow!, MMX, SSE, SSE2 L1 cache size: 64 KB L2 cache size: 512 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes L1 TLBS: 32 L2 TLBS: 512 Prime95 64-bit version 24.14, RdtscTiming=1 Best time for 4K FFT length: 0.112 ms. Best time for 5K FFT length: 0.156 ms. Best time for 6K FFT length: 0.193 ms. Best time for 7K FFT length: 0.244 ms. Best time for 8K FFT length: 0.270 ms. Best time for 10K FFT length: 0.333 ms. Best time for 12K FFT length: 0.403 ms. Best time for 14K FFT length: 0.491 ms. Best time for 16K FFT length: 0.532 ms. Best time for 20K FFT length: 0.735 ms. Best time for 24K FFT length: 0.904 ms. Best time for 28K FFT length: 1.059 ms. Best time for 32K FFT length: 1.183 ms. Best time for 40K FFT length: 1.666 ms. Best time for 48K FFT length: 2.073 ms. Best time for 56K FFT length: 2.308 ms. Best time for 64K FFT length: 2.762 ms. Best time for 80K FFT length: 3.605 ms. Best time for 96K FFT length: 4.143 ms. Best time for 112K FFT length: 5.052 ms. Best time for 128K FFT length: 5.897 ms. Best time for 160K FFT length: 6.537 ms. Best time for 192K FFT length: 7.969 ms. Best time for 224K FFT length: 9.621 ms. Best time for 256K FFT length: 10.632 ms. Best time for 320K FFT length: 13.641 ms. Best time for 384K FFT length: 16.868 ms. Best time for 448K FFT length: 20.470 ms. Best time for 512K FFT length: 22.794 ms. Best time for 640K FFT length: 29.422 ms. Best time for 768K FFT length: 35.677 ms. Best time for 896K FFT length: 42.761 ms. Best time for 1024K FFT length: 47.634 ms. Best time for 1280K FFT length: 60.563 ms. Best time for 1536K FFT length: 74.483 ms. Best time for 1792K FFT length: 90.322 ms. Best time for 2048K FFT length: 100.948 ms. Best time for 2560K FFT length: 133.724 ms. Best time for 3072K FFT length: 164.631 ms. Best time for 3584K FFT length: 198.673 ms. Best time for 4096K FFT length: 221.251 ms. Best time for 5120K FFT length: 297.774 ms. Best time for 6144K FFT length: 364.696 ms. Best time for 7168K FFT length: 444.786 ms. Best time for 8192K FFT length: 510.511 ms. Best time for 10240K FFT length: 645.568 ms. Best time for 12288K FFT length: 790.425 ms. Best time for 14336K FFT length: 959.701 ms. Best time for 16384K FFT length: 1098.557 ms. Best time for 20480K FFT length: 1476.747 ms. Best time for 24576K FFT length: 1841.349 ms. Best time for 28672K FFT length: 2261.181 ms. Best time for 32768K FFT length: 2595.958 ms. Best time for 58 bit trial factors: 3.652 ms. Best time for 59 bit trial factors: 3.645 ms. Best time for 60 bit trial factors: 3.876 ms. Best time for 61 bit trial factors: 3.996 ms. Best time for 62 bit trial factors: 4.732 ms. Best time for 63 bit trial factors: 5.103 ms. Best time for 64 bit trial factors: 6.583 ms. Best time for 65 bit trial factors: 7.806 ms. Best time for 66 bit trial factors: 7.749 ms. Best time for 67 bit trial factors: 7.718 ms. AMD Athlon(tm) 64 X2 Dual Core Processor 3600+ CPU speed: 2602.76 MHz CPU features: RDTSC, CMOV, Prefetch, 3DNow!, MMX, SSE, SSE2 L1 cache size: 64 KB L2 cache size: 512 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes L1 TLBS: 32 L2 TLBS: 512 Prime95 64-bit version 24.14, RdtscTiming=1 Best time for 4K FFT length: 0.091 ms. Best time for 5K FFT length: 0.125 ms. Best time for 6K FFT length: 0.157 ms. Best time for 7K FFT length: 0.197 ms. Best time for 8K FFT length: 0.217 ms. Best time for 10K FFT length: 0.269 ms. Best time for 12K FFT length: 0.324 ms. Best time for 14K FFT length: 0.390 ms. Best time for 16K FFT length: 0.427 ms. Best time for 20K FFT length: 0.606 ms. Best time for 24K FFT length: 0.711 ms. Best time for 28K FFT length: 0.852 ms. Best time for 32K FFT length: 0.950 ms. Best time for 40K FFT length: 1.339 ms. Best time for 48K FFT length: 1.673 ms. Best time for 56K FFT length: 1.863 ms. Best time for 64K FFT length: 2.235 ms. Best time for 80K FFT length: 2.928 ms. Best time for 96K FFT length: 3.385 ms. Best time for 112K FFT length: 4.134 ms. Best time for 128K FFT length: 4.523 ms. Best time for 160K FFT length: 5.291 ms. Best time for 192K FFT length: 6.435 ms. Best time for 224K FFT length: 7.774 ms. Best time for 256K FFT length: 8.582 ms. Best time for 320K FFT length: 11.002 ms. Best time for 384K FFT length: 13.632 ms. Best time for 448K FFT length: 16.538 ms. Best time for 512K FFT length: 18.420 ms. Best time for 640K FFT length: 23.777 ms. Best time for 768K FFT length: 28.788 ms. Best time for 896K FFT length: 34.564 ms. Best time for 1024K FFT length: 38.373 ms. Best time for 1280K FFT length: 48.797 ms. Best time for 1536K FFT length: 60.004 ms. Best time for 1792K FFT length: 72.760 ms. Best time for 2048K FFT length: 81.242 ms. Best time for 2560K FFT length: 108.669 ms. Best time for 3072K FFT length: 133.347 ms. Best time for 3584K FFT length: 161.308 ms. Best time for 4096K FFT length: 179.750 ms. Best time for 5120K FFT length: 240.675 ms. Best time for 6144K FFT length: 294.964 ms. Best time for 7168K FFT length: 360.931 ms. Best time for 8192K FFT length: 417.333 ms. Best time for 10240K FFT length: 525.032 ms. Best time for 12288K FFT length: 644.554 ms. Best time for 14336K FFT length: 781.722 ms. Best time for 16384K FFT length: 899.030 ms. Best time for 20480K FFT length: 1235.117 ms. Best time for 24576K FFT length: 1563.086 ms. Best time for 28672K FFT length: 1951.783 ms. Best time for 32768K FFT length: 2261.949 ms. Best time for 58 bit trial factors: 2.929 ms. Best time for 59 bit trial factors: 2.919 ms. Best time for 60 bit trial factors: 3.106 ms. Best time for 61 bit trial factors: 3.209 ms. Best time for 62 bit trial factors: 3.806 ms. Best time for 63 bit trial factors: 4.090 ms. Best time for 64 bit trial factors: 5.286 ms. Best time for 65 bit trial factors: 6.284 ms. Best time for 66 bit trial factors: 6.216 ms. Best time for 67 bit trial factors: 6.183 ms. AMD Athlon(tm) 64 X2 Dual Core Processor 3600+ CPU speed: 2697.76 MHz CPU features: RDTSC, CMOV, Prefetch, 3DNow!, MMX, SSE, SSE2 L1 cache size: 64 KB L2 cache size: 512 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes L1 TLBS: 32 L2 TLBS: 512 Prime95 64-bit version 24.14, RdtscTiming=1 Best time for 4K FFT length: 0.087 ms. Best time for 5K FFT length: 0.121 ms. Best time for 6K FFT length: 0.151 ms. Best time for 7K FFT length: 0.190 ms. Best time for 8K FFT length: 0.209 ms. Best time for 10K FFT length: 0.260 ms. Best time for 12K FFT length: 0.312 ms. Best time for 14K FFT length: 0.376 ms. Best time for 16K FFT length: 0.412 ms. Best time for 20K FFT length: 0.585 ms. Best time for 24K FFT length: 0.686 ms. Best time for 28K FFT length: 0.822 ms. Best time for 32K FFT length: 0.916 ms. Best time for 40K FFT length: 1.294 ms. Best time for 48K FFT length: 1.615 ms. Best time for 56K FFT length: 1.796 ms. Best time for 64K FFT length: 2.156 ms. Best time for 80K FFT length: 2.829 ms. Best time for 96K FFT length: 3.259 ms. Best time for 112K FFT length: 3.989 ms. Best time for 128K FFT length: 4.367 ms. Best time for 160K FFT length: 5.108 ms. Best time for 192K FFT length: 6.202 ms. Best time for 224K FFT length: 7.508 ms. Best time for 256K FFT length: 8.286 ms. Best time for 320K FFT length: 10.614 ms. Best time for 384K FFT length: 13.112 ms. Best time for 448K FFT length: 15.957 ms. Best time for 512K FFT length: 17.769 ms. Best time for 640K FFT length: 22.942 ms. Best time for 768K FFT length: 27.801 ms. Best time for 896K FFT length: 33.348 ms. Best time for 1024K FFT length: 36.994 ms. Best time for 1280K FFT length: 47.062 ms. Best time for 1536K FFT length: 57.893 ms. Best time for 1792K FFT length: 70.278 ms. Best time for 2048K FFT length: 78.441 ms. Best time for 2560K FFT length: 104.747 ms. Best time for 3072K FFT length: 128.548 ms. Best time for 3584K FFT length: 155.564 ms. Best time for 4096K FFT length: 173.504 ms. Best time for 5120K FFT length: 230.990 ms. Best time for 6144K FFT length: 284.428 ms. Best time for 7168K FFT length: 347.070 ms. Best time for 8192K FFT length: 402.924 ms. Best time for 10240K FFT length: 507.182 ms. Best time for 12288K FFT length: 621.027 ms. Best time for 14336K FFT length: 754.809 ms. Best time for 16384K FFT length: 869.236 ms. Best time for 20480K FFT length: 1190.467 ms. Best time for 24576K FFT length: 1508.291 ms. Best time for 28672K FFT length: 1880.352 ms. Best time for 32768K FFT length: 2180.548 ms. Best time for 58 bit trial factors: 2.826 ms. Best time for 59 bit trial factors: 2.819 ms. Best time for 60 bit trial factors: 2.999 ms. Best time for 61 bit trial factors: 3.090 ms. Best time for 62 bit trial factors: 3.661 ms. Best time for 63 bit trial factors: 3.947 ms. Best time for 64 bit trial factors: 5.089 ms. Best time for 65 bit trial factors: 6.062 ms. Best time for 66 bit trial factors: 5.988 ms. Best time for 67 bit trial factors: 5.997 ms. |
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2007-04-10, 17:02
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#282 |
Sep 2002
Austin, TX
10001100012 Posts |
that chip can be purchased for 65usd now.
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2007-07-04, 12:47
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#283 |
Feb 2004
France
22×229 Posts |
prime95 on a 8 cores Xeon 3 GHz machine. Problem w
Here are the performance results of prime95 25.2 on a IBM xSeries x460 4 Chips 8 cores.
It seems that prime95 does not correctly recognizes the 8 cores. I do not see 8 threads on 8 cores in the results. Why prime95 does not use the same number of threads as there are cores ? I've tried to say 8 "worker threads" and only 1 thread per core in the configuration (local.txt: WorkerThreads=8 ; ThreadsPerTest=1) but the benchmark does not seem to use it. Help !  After first post:Hum? Seems I was lost by prime95 saying n (1 to 4) physical CPUs though Linux talks of 8 processors. Is prime95 smart enough to see that there are 2 cores per CPU ? and then run 2 threads per CPU (meaning as many threads as used cores) ? Is prime95 able to handle machines with more than 2 cores ? Some more comment:Also, prime95 talks about: "4 hyperthreaded cores" here below. There are 4 CPUs with 2 cores each. Not 4 cores with hyperthreading ! (I could run the machine with HT on and thus Linux should see 16 processors ....). If I have time, I'll try to build a graph. With a quick glance with FFT 4096 the scalability seems not bad. T. Code:
Intel(R) Xeon(TM) CPU 3.00GHz CPU speed: 3002.34 MHz, 4 hyperthreaded cores CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2 L1 cache size: 16 KB L2 cache size: 2048 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes TLBS: 64 Prime95 32-bit version 25.2, RdtscTiming=1 Best time for 768K FFT length: 25.933 ms. Best time for 896K FFT length: 31.635 ms. Best time for 1024K FFT length: 35.682 ms. Best time for 1280K FFT length: 44.054 ms. Best time for 1536K FFT length: 53.208 ms. Best time for 1792K FFT length: 64.129 ms. Best time for 2048K FFT length: 72.330 ms. Best time for 2560K FFT length: 93.694 ms. Best time for 3072K FFT length: 112.738 ms. Best time for 3584K FFT length: 136.003 ms. Best time for 4096K FFT length: 151.340 ms. Best time for 5120K FFT length: 190.267 ms. Best time for 6144K FFT length: 236.435 ms. Best time for 7168K FFT length: 284.124 ms. Best time for 8192K FFT length: 313.464 ms. Timing FFTs using 2 threads on 1 physical CPUs. Best time for 768K FFT length: 15.987 ms. Best time for 896K FFT length: 18.237 ms. Best time for 1024K FFT length: 27.179 ms. Best time for 1280K FFT length: 23.619 ms. Best time for 1536K FFT length: 28.461 ms. Best time for 1792K FFT length: 33.976 ms. Best time for 2048K FFT length: 38.330 ms. Best time for 2560K FFT length: 49.889 ms. Best time for 3072K FFT length: 60.346 ms. Best time for 3584K FFT length: 72.050 ms. Best time for 4096K FFT length: 79.673 ms. Best time for 5120K FFT length: 100.437 ms. Best time for 6144K FFT length: 127.995 ms. Best time for 7168K FFT length: 154.474 ms. Best time for 8192K FFT length: 169.825 ms. Timing FFTs using 4 threads on 2 physical CPUs. Best time for 768K FFT length: 14.587 ms. Best time for 896K FFT length: 16.288 ms. Best time for 1024K FFT length: 24.645 ms. Best time for 1280K FFT length: 17.331 ms. Best time for 1536K FFT length: 20.287 ms. Best time for 1792K FFT length: 23.178 ms. Best time for 2048K FFT length: 25.840 ms. Best time for 2560K FFT length: 32.137 ms. Best time for 3072K FFT length: 38.339 ms. Best time for 3584K FFT length: 44.631 ms. Best time for 4096K FFT length: 50.332 ms. Best time for 5120K FFT length: 60.550 ms. Best time for 6144K FFT length: 80.565 ms. Best time for 7168K FFT length: 93.462 ms. Best time for 8192K FFT length: 105.859 ms. Timing FFTs using 6 threads on 3 physical CPUs. Best time for 768K FFT length: 14.769 ms. Best time for 896K FFT length: 15.717 ms. Best time for 1024K FFT length: 24.664 ms. Best time for 1280K FFT length: 16.923 ms. Best time for 1536K FFT length: 20.159 ms. Best time for 1792K FFT length: 22.701 ms. Best time for 2048K FFT length: 25.457 ms. Best time for 2560K FFT length: 31.355 ms. Best time for 3072K FFT length: 39.216 ms. Best time for 3584K FFT length: 51.312 ms. Best time for 4096K FFT length: 52.135 ms. Best time for 5120K FFT length: 63.983 ms. Best time for 6144K FFT length: 87.370 ms. Best time for 7168K FFT length: 94.171 ms. Best time for 8192K FFT length: 115.765 ms. Timing FFTs using 8 threads on 4 physical CPUs. Best time for 768K FFT length: 13.669 ms. Best time for 896K FFT length: 15.957 ms. Best time for 1024K FFT length: 25.093 ms. Best time for 1280K FFT length: 18.251 ms. Best time for 1536K FFT length: 20.589 ms. Best time for 1792K FFT length: 22.798 ms. Best time for 2048K FFT length: 29.553 ms. Best time for 2560K FFT length: 34.499 ms. Best time for 3072K FFT length: 41.285 ms. Best time for 3584K FFT length: 44.560 ms. Best time for 4096K FFT length: 45.899 ms. Best time for 5120K FFT length: 58.874 ms. Best time for 6144K FFT length: 78.755 ms. Best time for 7168K FFT length: 88.255 ms. Best time for 8192K FFT length: 103.105 ms. Best time for 58 bit trial factors: 9.167 ms. Best time for 59 bit trial factors: 9.145 ms. Best time for 60 bit trial factors: 9.134 ms. Best time for 61 bit trial factors: 9.071 ms. Best time for 62 bit trial factors: 12.832 ms. Best time for 63 bit trial factors: 12.860 ms. Best time for 64 bit trial factors: 15.039 ms. Best time for 65 bit trial factors: 14.950 ms. Best time for 66 bit trial factors: 14.869 ms. Best time for 67 bit trial factors: 14.814 ms. Last fiddled with by T.Rex on 2007-07-04 at 12:55 |
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2007-07-04, 14:49
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#284 |
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Feb 2004
France
22×229 Posts |
prime 25.3 on Linux ia32 with 8 cores Xeon 3GHz
Here are the results with prime 25.3 on the same machine as previously (8 fast Xeon cores). It's nearly the same as compared with prime 25.2 .
About scalability: - with 2 threads running on 1 CPUs (= 2 cores), the scalability is about 1.9 instead of the theoretical 2 . Quite good ! - with 4 threads running on 2 CPUs (= 4 cores), the scalability is about 3 instead of the theoretical 4 . Not so good. Using more of 4 threads is a wast of prower, since the scalability is ... about 3 instead of 6 or 8 ! T. Intel(R) Xeon(TM) CPU 3.00GHz CPU speed: 3001.30 MHz, 4 hyperthreaded cores CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2 L1 cache size: 16 KB L2 cache size: 2048 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes TLBS: 64 Prime95 32-bit version 25.3, RdtscTiming=1- Best time for 768K FFT length: 25.830 ms. Best time for 896K FFT length: 31.457 ms. Best time for 1024K FFT length: 35.662 ms. Best time for 1280K FFT length: 44.058 ms. Best time for 1536K FFT length: 53.176 ms. Best time for 1792K FFT length: 63.989 ms. Best time for 2048K FFT length: 70.696 ms. Best time for 2560K FFT length: 93.563 ms. Best time for 3072K FFT length: 112.445 ms. Best time for 3584K FFT length: 135.971 ms. Best time for 4096K FFT length: 151.438 ms. Best time for 5120K FFT length: 190.948 ms. Best time for 6144K FFT length: 236.563 ms. Best time for 7168K FFT length: 287.465 ms. Best time for 8192K FFT length: 314.891 ms. Timing FFTs using 2 threads on 1 physical CPUs. Best time for 768K FFT length: 15.969 ms. Best time for 896K FFT length: 18.335 ms. Best time for 1024K FFT length: 27.416 ms. Best time for 1280K FFT length: 23.626 ms. Best time for 1536K FFT length: 28.379 ms. Best time for 1792K FFT length: 33.963 ms. Best time for 2048K FFT length: 38.222 ms. Best time for 2560K FFT length: 50.059 ms. Best time for 3072K FFT length: 60.755 ms. Best time for 3584K FFT length: 73.396 ms. Best time for 4096K FFT length: 79.812 ms. Best time for 5120K FFT length: 100.480 ms. Best time for 6144K FFT length: 129.827 ms. Best time for 7168K FFT length: 153.948 ms. Best time for 8192K FFT length: 169.709 ms. Timing FFTs using 4 threads on 2 physical CPUs. Best time for 768K FFT length: 14.534 ms. Best time for 896K FFT length: 16.443 ms. Best time for 1024K FFT length: 24.933 ms. Best time for 1280K FFT length: 17.339 ms. Best time for 1536K FFT length: 20.363 ms. Best time for 1792K FFT length: 30.280 ms. Best time for 2048K FFT length: 25.979 ms. Best time for 2560K FFT length: 32.147 ms. Best time for 3072K FFT length: 38.287 ms. Best time for 3584K FFT length: 44.628 ms. Best time for 4096K FFT length: 50.379 ms. Best time for 5120K FFT length: 60.535 ms. Best time for 6144K FFT length: 80.425 ms. Best time for 7168K FFT length: 93.126 ms. Best time for 8192K FFT length: 105.730 ms. Timing FFTs using 6 threads on 3 physical CPUs. Best time for 768K FFT length: 14.756 ms. Best time for 896K FFT length: 19.971 ms. Best time for 1024K FFT length: 24.923 ms. Best time for 1280K FFT length: 16.992 ms. Best time for 1536K FFT length: 20.147 ms. Best time for 1792K FFT length: 22.643 ms. Best time for 2048K FFT length: 25.412 ms. Best time for 2560K FFT length: 31.385 ms. Best time for 3072K FFT length: 39.171 ms. Best time for 3584K FFT length: 46.995 ms. Best time for 4096K FFT length: 53.629 ms. Best time for 5120K FFT length: 63.910 ms. Best time for 6144K FFT length: 102.183 ms. Best time for 7168K FFT length: 94.961 ms. Best time for 8192K FFT length: 104.996 ms. Timing FFTs using 8 threads on 4 physical CPUs. Best time for 768K FFT length: 17.253 ms. Best time for 896K FFT length: 18.371 ms. Best time for 1024K FFT length: 25.337 ms. Best time for 1280K FFT length: 15.121 ms. Best time for 1536K FFT length: 19.383 ms. Best time for 1792K FFT length: 23.510 ms. Best time for 2048K FFT length: 26.952 ms. Best time for 2560K FFT length: 33.292 ms. Best time for 3072K FFT length: 34.955 ms. Best time for 3584K FFT length: 51.667 ms. Best time for 4096K FFT length: 49.697 ms. Best time for 5120K FFT length: 61.351 ms. Best time for 6144K FFT length: 78.580 ms. Best time for 7168K FFT length: 95.441 ms. Best time for 8192K FFT length: 106.943 ms. Best time for 58 bit trial factors: 9.162 ms. Best time for 59 bit trial factors: 9.085 ms. Best time for 60 bit trial factors: 9.066 ms. Best time for 61 bit trial factors: 9.060 ms. Best time for 62 bit trial factors: 12.926 ms. Best time for 63 bit trial factors: 12.936 ms. Best time for 64 bit trial factors: 15.043 ms. Best time for 65 bit trial factors: 14.929 ms. Best time for 66 bit trial factors: 15.200 ms. Best time for 67 bit trial factors: 15.039 ms. |
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2007-07-05, 17:38
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#285 |
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Feb 2004
France
22·229 Posts |
Comparison with Glucas
Here are data that enable to compare the scalability of prime95 with another multi-threaded FFT/LLT: Glucas.
Done with a >10Mdigits exponent. Between parenthesis: scalability compared to Glucas with no thread at all. With no thread, Glucas takes 0.1628 sec/iter . With 1 thread, Glucas takes 0.2091 sec/iter . Scalability is: 1 .(0.78) With 2 threads, Glucas takes 0.1086 sec/iter . Scalability is: 1.93 .(1.5) With 4 threads, Glucas takes 0.0651 sec/iter . Scalability is: 3.21 .(2.5) With 6 threads, Glucas takes 0.0501 sec/iter . Scalability is: 4.17 .(3.25) With 8 threads, Glucas takes 0.0415 sec/iter . Scalability is: 5.04 .(3.92) Conclusions: Glucas is more scalable than prime95 v25.3 . Mainly when using more that 4 cores. Compared to Glucas compiled with no thread at all, Glucas with 8 threads is only 4 times faster. Using 8 Glucas no-thread instead of 1 Glucas 8-threads is 2 times faster. When verifying a Mersenne prime candidate, it is worth to use Glucas multi-threaded, compared to prime95 multi-threaded. There is room for improvements for the multi-threading of prime95 ! T. |
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2007-07-05, 21:00
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#286 |
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Feb 2004
France
91610 Posts |
Comparison with Glucas
Hum,
Maybe I'm not comparing the right things. I used 2 versions of Glucas: one compiled with Multi-Threading and one without M-T. But I used only one version of prime95 25.3 : about the prime95 benchmark, I don't know if the first measure is done with a library of prime95 that is Multi-Threaded or not ... If prime95 is able to use a non M-T library, then prime95 is faster than Glucas when using 4 threads on 4 cores (scalability of ~3 compared to 2.5) but slower when using 8 threads on 8 cores (scalability of ~3 compared to ~4). BTW, George, would it be possible to add the possibility to bind prime95 threads on a set of processors, in order to reduce the NUMA effect when using 4 cores about 8 ? T. |
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2007-07-06, 20:22
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#287 | |
"Oliver"
Mar 2005
Germany
11·101 Posts |
Hello Tony,
Quote:
Usually I use "numactl" if I want to pin a process (or a process group) to a set of CPUs and memory ranges while running Linux. Example: numactl --physcpubind=0,2 --localalloc <application> this would pin the application to CPU0 or CPU2 (numbers from /proc/cpuinfo). This works great for many applications, especially on Opterons since they are real NUMA... And now the bad news: At least mprime 24.xx calls sched_setaffinity() even if it was NOT told to pin to a specific CPU via ini-file. In this case mprime calls the sched_setaffinity() function with a CPU-mask 0xFFFFFFFF which means that it want to run on any of the 1st 32 CPUs... |
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2007-08-01, 01:40
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#288 |
Mar 2003
New Zealand
13×89 Posts |
E6750
Intel Core 2 Duo E6750, stepping 0B.
ASUS P5K-VM, G33 chipset. Transcend JM2GDDR2-8K, DDR2 800, CL5. All stock settings, but with speedstep disabled in BIOS. Running Linux/x86-64 from an Ubuntu live CD, with a fake libcurl.so.4. Code:
Intel(R) Core(TM)2 Duo CPU E6750 @ 2.66GHz CPU speed: 2671.50 MHz, 2 cores CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2 L1 cache size: 32 KB L2 cache size: 4096 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes TLBS: 256 Prime95 64-bit version 25.3, RdtscTiming=1 Best time for 768K FFT length: 15.720 ms. Best time for 896K FFT length: 18.772 ms. Best time for 1024K FFT length: 21.442 ms. Best time for 1280K FFT length: 26.580 ms. Best time for 1536K FFT length: 32.532 ms. Best time for 1792K FFT length: 38.715 ms. Best time for 2048K FFT length: 43.067 ms. Best time for 2560K FFT length: 56.481 ms. Best time for 3072K FFT length: 69.312 ms. Best time for 3584K FFT length: 82.517 ms. Best time for 4096K FFT length: 92.188 ms. Best time for 5120K FFT length: 117.745 ms. Best time for 6144K FFT length: 142.917 ms. Best time for 7168K FFT length: 174.043 ms. Best time for 8192K FFT length: 190.819 ms. Timing FFTs using 2 threads. Best time for 768K FFT length: 8.157 ms. Best time for 896K FFT length: 9.812 ms. Best time for 1024K FFT length: 11.285 ms. Best time for 1280K FFT length: 13.928 ms. Best time for 1536K FFT length: 17.224 ms. Best time for 1792K FFT length: 20.266 ms. Best time for 2048K FFT length: 22.848 ms. Best time for 2560K FFT length: 29.801 ms. Best time for 3072K FFT length: 36.417 ms. Best time for 3584K FFT length: 43.380 ms. Best time for 4096K FFT length: 48.831 ms. Best time for 5120K FFT length: 62.152 ms. Best time for 6144K FFT length: 77.109 ms. Best time for 7168K FFT length: 92.757 ms. Best time for 8192K FFT length: 104.310 ms. Best time for 58 bit trial factors: 3.336 ms. Best time for 59 bit trial factors: 3.330 ms. Best time for 60 bit trial factors: 3.641 ms. Best time for 61 bit trial factors: 3.839 ms. Best time for 62 bit trial factors: 4.475 ms. Best time for 63 bit trial factors: 5.607 ms. Best time for 64 bit trial factors: 6.028 ms. Best time for 65 bit trial factors: 6.463 ms. Best time for 66 bit trial factors: 6.397 ms. Best time for 67 bit trial factors: 6.370 ms. |
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2007-08-04, 18:40
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#289 |
Mar 2007
Berlin, Germany
A16 Posts |
For the sake of having a reference see the following results. Note that there is not that much of an improvement from running Prime95 on three or four cores (see memory bottleneck).
-D Code:
Intel(R) Xeon(R) CPU 5160 @ 3.00GHz CPU speed: 3204.05 MHz, 4 cores CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2 L1 cache size: 32 KB L2 cache size: 4096 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes TLBS: 256 Prime95 32-bit version 25.3, RdtscTiming=1 Best time for 768K FFT length: 13.849 ms. Best time for 896K FFT length: 16.749 ms. Best time for 1024K FFT length: 19.023 ms. Best time for 1280K FFT length: 23.947 ms. Best time for 1536K FFT length: 29.319 ms. Best time for 1792K FFT length: 35.038 ms. Best time for 2048K FFT length: 39.119 ms. Best time for 2560K FFT length: 51.507 ms. Best time for 3072K FFT length: 62.919 ms. Best time for 3584K FFT length: 74.852 ms. Best time for 4096K FFT length: 83.869 ms. Best time for 5120K FFT length: 107.006 ms. Best time for 6144K FFT length: 128.722 ms. Best time for 7168K FFT length: 155.989 ms. Best time for 8192K FFT length: 171.460 ms. Timing FFTs using 2 threads. Best time for 768K FFT length: 14.217 ms. Best time for 896K FFT length: 16.151 ms. Best time for 1024K FFT length: 21.919 ms. Best time for 1280K FFT length: 18.645 ms. Best time for 1536K FFT length: 22.578 ms. Best time for 1792K FFT length: 26.076 ms. Best time for 2048K FFT length: 29.430 ms. Best time for 2560K FFT length: 37.801 ms. Best time for 3072K FFT length: 46.155 ms. Best time for 3584K FFT length: 54.326 ms. Best time for 4096K FFT length: 62.073 ms. Best time for 5120K FFT length: 75.494 ms. Best time for 6144K FFT length: 90.140 ms. Best time for 7168K FFT length: 108.159 ms. Best time for 8192K FFT length: 122.330 ms. Timing FFTs using 3 threads. Best time for 768K FFT length: 10.280 ms. Best time for 896K FFT length: 11.991 ms. Best time for 1024K FFT length: 19.685 ms. Best time for 1280K FFT length: 15.145 ms. Best time for 1536K FFT length: 18.247 ms. Best time for 1792K FFT length: 21.375 ms. Best time for 2048K FFT length: 24.486 ms. Best time for 2560K FFT length: 31.278 ms. Best time for 3072K FFT length: 38.313 ms. Best time for 3584K FFT length: 45.167 ms. Best time for 4096K FFT length: 51.682 ms. Best time for 5120K FFT length: 62.440 ms. Best time for 6144K FFT length: 76.929 ms. Best time for 7168K FFT length: 90.957 ms. Best time for 8192K FFT length: 102.885 ms. Timing FFTs using 4 threads. Best time for 768K FFT length: 11.297 ms. Best time for 896K FFT length: 12.846 ms. Best time for 1024K FFT length: 21.918 ms. Best time for 1280K FFT length: 13.915 ms. Best time for 1536K FFT length: 16.707 ms. Best time for 1792K FFT length: 19.476 ms. Best time for 2048K FFT length: 22.268 ms. Best time for 2560K FFT length: 28.380 ms. Best time for 3072K FFT length: 34.850 ms. Best time for 3584K FFT length: 41.447 ms. Best time for 4096K FFT length: 48.045 ms. Best time for 5120K FFT length: 59.141 ms. Best time for 6144K FFT length: 72.136 ms. Best time for 7168K FFT length: 86.582 ms. Best time for 8192K FFT length: 100.139 ms. Best time for 58 bit trial factors: 3.374 ms. Best time for 59 bit trial factors: 3.494 ms. Best time for 60 bit trial factors: 3.508 ms. Best time for 61 bit trial factors: 3.492 ms. Best time for 62 bit trial factors: 5.722 ms. Best time for 63 bit trial factors: 5.732 ms. Best time for 64 bit trial factors: 5.550 ms. Best time for 65 bit trial factors: 5.520 ms. Best time for 66 bit trial factors: 5.516 ms. Best time for 67 bit trial factors: 5.496 ms. |
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2007-08-06, 12:01
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#290 | |
Nov 2003
746010 Posts |
Quote:
I may be having a stupidity attack, but it is unclear to me whether this represents one instance running in parallel on multiple cores, or multiple instances... With multi-core machines it is almost certainly better to run multiple instances. For example, I recently benchmarked my NFS siever on a CORE-2 at 2.4GHz. With one instance running it took 8.3 seconds per special q. With two, EACH one took about 8.45 seconds --> i.e. 1.964 times the throughput. I was surprised. I expected cache/bus contention to have more of an impact. I don't have access to a quad core machine, so can't experiment further. |
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2007-08-06, 16:01
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#291 | |
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Mar 2007
Berlin, Germany
2×5 Posts |
Quote:
-D |
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2007-08-06, 18:13
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#292 | |
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P90 years forever!
Aug 2002
Yeehaw, FL
19·397 Posts |
Quote:
The info is for reference purposes only as you are correct that it is better to test a different exponent on each core. The default behavior for prime95 does not use the parallel code. Also, DO NOT attribute the poor scaling to the Intel architecture or memory bandwidth. It could easily be prime95's parallel implementation that is in need of improvement. Different applications may scale much better or much worse. |
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2007-08-08, 23:47
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#293 |
Jul 2004
Mid Calder, Scotland
5·37 Posts |
Benchmark on v25.3
Processor (CPU) INTEL® Core 2 Extreme QX6800 (4 X 2.93GHz) 1066MHz FSB/2x4MB Cache
Memory (RAM) 2048 MB CORSAIR XMS2 800MHz (2x1GB) Operating System WINDOWS® VISTA Home Premium Compare your results to other computers at http://www.mersenne.org/bench.htm Intel(R) Core(TM)2 Quad CPU @ 2.93GHz CPU speed: 2935.73 MHz, 4 cores CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2 L1 cache size: 32 KB L2 cache size: 4096 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes TLBS: 256 Prime95 32-bit version 25.3, RdtscTiming=1 Best time for 768K FFT length: 14.803 ms. Best time for 896K FFT length: 17.646 ms. Best time for 1024K FFT length: 20.317 ms. Best time for 1280K FFT length: 25.242 ms. Best time for 1536K FFT length: 30.821 ms. Best time for 1792K FFT length: 36.638 ms. Best time for 2048K FFT length: 40.677 ms. Best time for 2560K FFT length: 53.766 ms. Best time for 3072K FFT length: 65.308 ms. Best time for 3584K FFT length: 77.869 ms. Best time for 4096K FFT length: 86.908 ms. Best time for 5120K FFT length: 111.457 ms. Best time for 6144K FFT length: 135.721 ms. Best time for 7168K FFT length: 165.223 ms. Best time for 8192K FFT length: 180.015 ms. Timing FFTs using 2 threads. Best time for 768K FFT length: 8.156 ms. Best time for 896K FFT length: 9.651 ms. Best time for 1024K FFT length: 12.689 ms. Best time for 1280K FFT length: 13.602 ms. Best time for 1536K FFT length: 16.670 ms. Best time for 1792K FFT length: 19.749 ms. Best time for 2048K FFT length: 22.135 ms. Best time for 2560K FFT length: 28.863 ms. Best time for 3072K FFT length: 35.391 ms. Best time for 3584K FFT length: 41.811 ms. Best time for 4096K FFT length: 47.075 ms. Best time for 5120K FFT length: 60.604 ms. Best time for 6144K FFT length: 74.535 ms. Best time for 7168K FFT length: 90.009 ms. Best time for 8192K FFT length: 101.340 ms. Timing FFTs using 3 threads. Best time for 768K FFT length: 14.710 ms. Best time for 896K FFT length: 15.555 ms. Best time for 1024K FFT length: 25.734 ms. Best time for 1280K FFT length: 13.235 ms. Best time for 1536K FFT length: 15.729 ms. Best time for 1792K FFT length: 18.493 ms. Best time for 2048K FFT length: 20.730 ms. Best time for 2560K FFT length: 27.075 ms. Best time for 3072K FFT length: 32.825 ms. Best time for 3584K FFT length: 37.862 ms. Best time for 4096K FFT length: 43.170 ms. Best time for 5120K FFT length: 52.882 ms. Best time for 6144K FFT length: 64.273 ms. Best time for 7168K FFT length: 77.444 ms. Best time for 8192K FFT length: 88.054 ms. Timing FFTs using 4 threads. Best time for 768K FFT length: 13.965 ms. Best time for 896K FFT length: 14.985 ms. Best time for 1024K FFT length: 22.347 ms. Best time for 1280K FFT length: 14.399 ms. Best time for 1536K FFT length: 15.385 ms. Best time for 1792K FFT length: 15.406 ms. Best time for 2048K FFT length: 17.497 ms. Best time for 2560K FFT length: 21.795 ms. Best time for 3072K FFT length: 26.702 ms. Best time for 3584K FFT length: 31.239 ms. Best time for 4096K FFT length: 35.859 ms. Best time for 5120K FFT length: 44.613 ms. Best time for 6144K FFT length: 54.274 ms. Best time for 7168K FFT length: 65.224 ms. Best time for 8192K FFT length: 75.270 ms. Best time for 58 bit trial factors: 3.653 ms. Best time for 59 bit trial factors: 3.685 ms. Best time for 60 bit trial factors: 3.633 ms. Best time for 61 bit trial factors: 3.657 ms. Best time for 62 bit trial factors: 6.090 ms. Best time for 63 bit trial factors: 6.109 ms. Best time for 64 bit trial factors: 5.910 ms. Best time for 65 bit trial factors: 5.875 ms. Best time for 66 bit trial factors: 5.900 ms. Best time for 67 bit trial factors: 5.873 ms. |
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2007-09-28, 23:53
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#294 |
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24×449 Posts |
Running Windows Vista Business Edition.
Intel(R) Core(TM)2 CPU 6700 @ 2.66GHz CPU speed: 2666.56 MHz CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2 L1 cache size: 32 KB L2 cache size: unknown L1 cache line size: 64 bytes L2 cache line size: unknown Prime95 32-bit version 24.14, RdtscTiming=1 Best time for 512K FFT length: 9.574 ms. Best time for 640K FFT length: 13.030 ms. Best time for 768K FFT length: 16.053 ms. Best time for 896K FFT length: 19.159 ms. Best time for 1024K FFT length: 21.228 ms. Best time for 1280K FFT length: 27.003 ms. Best time for 1536K FFT length: 33.030 ms. Best time for 1792K FFT length: 39.252 ms. Best time for 2048K FFT length: 43.670 ms. Best time for 2560K FFT length: 57.669 ms. Best time for 3072K FFT length: 70.901 ms. Best time for 3584K FFT length: 84.567 ms. Best time for 4096K FFT length: 94.978 ms. Best time for 58 bit trial factors: 4.207 ms. Best time for 59 bit trial factors: 4.222 ms. Best time for 60 bit trial factors: 4.173 ms. Best time for 61 bit trial factors: 4.208 ms. Best time for 62 bit trial factors: 6.710 ms. Best time for 63 bit trial factors: 6.721 ms. Best time for 64 bit trial factors: 6.422 ms. Best time for 65 bit trial factors: 6.432 ms. Best time for 66 bit trial factors: 6.388 ms. Best time for 67 bit trial factors: 6.392 ms. |
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2007-10-03, 07:29
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#295 |
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Bemusing Prompter
"Danny"
Dec 2002
California
1001011000012 Posts |
Dang, Bundu, that's a nice system. :D
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2007-10-03, 12:36
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#296 |
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(loop (#_fork))
Feb 2006
Cambridge, England
23·11·73 Posts |
Dual Opteron 2216 (4 cores, 2.4GHz) [company's compute server]
This machine is only a year old, but is just about half the speed of a QX6800. There is a protein-analysis job on the fourth core (which has been running for a month so far), which meant the timings for four threads were in the three-second range, so I've not mentioned those. Code:
[Worker #1 Oct 3 13:24] Timing 39 iterations at 768K FFT length. Best time: 31.022 ms. [Worker #1 Oct 3 13:24] Timing 34 iterations at 896K FFT length. Best time: 36.985 ms. [Worker #1 Oct 3 13:24] Timing 29 iterations at 1024K FFT length. Best time: 41.030 ms. [Worker #1 Oct 3 13:24] Timing 23 iterations at 1280K FFT length. Best time: 52.455 ms. [Worker #1 Oct 3 13:24] Timing 19 iterations at 1536K FFT length. Best time: 63.697 ms. [Worker #1 Oct 3 13:24] Timing 17 iterations at 1792K FFT length. Best time: 77.128 ms. [Worker #1 Oct 3 13:24] Timing 14 iterations at 2048K FFT length. Best time: 86.075 ms. [Worker #1 Oct 3 13:24] Timing 11 iterations at 2560K FFT length. Best time: 113.336 ms. [Worker #1 Oct 3 13:24] Timing 10 iterations at 3072K FFT length. Best time: 137.694 ms. [Worker #1 Oct 3 13:24] Timing 10 iterations at 3584K FFT length. Best time: 166.261 ms. [Worker #1 Oct 3 13:24] Timing 10 iterations at 4096K FFT length. Best time: 185.472 ms. [Worker #1 Oct 3 13:24] Timing 10 iterations at 5120K FFT length. Best time: 242.171 ms. [Worker #1 Oct 3 13:24] Timing 10 iterations at 6144K FFT length. Best time: 296.867 ms. [Worker #1 Oct 3 13:24] Timing 10 iterations at 7168K FFT length. Best time: 359.789 ms. [Worker #1 Oct 3 13:25] Timing 10 iterations at 8192K FFT length. Best time: 420.367 ms. [Worker #1 Oct 3 13:25] Timing FFTs using 2 threads. [Worker #1 Oct 3 13:25] Timing 39 iterations at 768K FFT length. Best time: 19.157 ms. [Worker #1 Oct 3 13:25] Timing 34 iterations at 896K FFT length. Best time: 22.871 ms. [Worker #1 Oct 3 13:25] Timing 29 iterations at 1024K FFT length. Best time: 25.871 ms. [Worker #1 Oct 3 13:25] Timing 23 iterations at 1280K FFT length. Best time: 34.670 ms. [Worker #1 Oct 3 13:25] Timing 19 iterations at 1536K FFT length. Best time: 41.658 ms. [Worker #1 Oct 3 13:25] Timing 17 iterations at 1792K FFT length. Best time: 49.989 ms. [Worker #1 Oct 3 13:25] Timing 14 iterations at 2048K FFT length. Best time: 56.124 ms. [Worker #1 Oct 3 13:25] Timing 11 iterations at 2560K FFT length. Best time: 74.350 ms. [Worker #1 Oct 3 13:25] Timing 10 iterations at 3072K FFT length. Best time: 90.026 ms. [Worker #1 Oct 3 13:25] Timing 10 iterations at 3584K FFT length. Best time: 106.669 ms. [Worker #1 Oct 3 13:25] Timing 10 iterations at 4096K FFT length. Best time: 119.611 ms. [Worker #1 Oct 3 13:25] Timing 10 iterations at 5120K FFT length. Best time: 133.539 ms. [Worker #1 Oct 3 13:25] Timing 10 iterations at 6144K FFT length. Best time: 181.363 ms. [Worker #1 Oct 3 13:25] Timing 10 iterations at 7168K FFT length. Best time: 221.455 ms. [Worker #1 Oct 3 13:26] Timing 10 iterations at 8192K FFT length. Best time: 258.508 ms. [Worker #1 Oct 3 13:26] Timing FFTs using 3 threads. [Worker #1 Oct 3 13:26] Timing 39 iterations at 768K FFT length. Best time: 15.866 ms. [Worker #1 Oct 3 13:26] Timing 34 iterations at 896K FFT length. Best time: 18.178 ms. [Worker #1 Oct 3 13:26] Timing 29 iterations at 1024K FFT length. Best time: 20.588 ms. [Worker #1 Oct 3 13:26] Timing 23 iterations at 1280K FFT length. Best time: 32.625 ms. [Worker #1 Oct 3 13:26] Timing 19 iterations at 1536K FFT length. Best time: 37.852 ms. [Worker #1 Oct 3 13:26] Timing 17 iterations at 1792K FFT length. Best time: 43.261 ms. [Worker #1 Oct 3 13:26] Timing 14 iterations at 2048K FFT length. Best time: 48.171 ms. [Worker #1 Oct 3 13:26] Timing 11 iterations at 2560K FFT length. Best time: 67.688 ms. [Worker #1 Oct 3 13:26] Timing 10 iterations at 3072K FFT length. Best time: 79.096 ms. [Worker #1 Oct 3 13:26] Timing 10 iterations at 3584K FFT length. Best time: 90.504 ms. [Worker #1 Oct 3 13:26] Timing 10 iterations at 4096K FFT length. Best time: 102.211 ms. [Worker #1 Oct 3 13:26] Timing 10 iterations at 5120K FFT length. Best time: 93.737 ms. [Worker #1 Oct 3 13:26] Timing 10 iterations at 6144K FFT length. Best time: 115.809 ms. [Worker #1 Oct 3 13:26] Timing 10 iterations at 7168K FFT length. Best time: 149.458 ms. [Worker #1 Oct 3 13:26] Timing 10 iterations at 8192K FFT length. Best time: 176.192 ms. |
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2007-10-03, 12:40
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#297 |
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(loop (#_fork))
Feb 2006
Cambridge, England
191816 Posts |
Core2 E6600, version 25.5 under linux-x64
Code:
[Worker #1 Oct 3 13:36] Timing 39 iterations at 768K FFT length. Best time: 17.423 ms. [Worker #1 Oct 3 13:36] Timing 34 iterations at 896K FFT length. Best time: 20.847 ms. [Worker #1 Oct 3 13:36] Timing 29 iterations at 1024K FFT length. Best time: 23.692 ms. [Worker #1 Oct 3 13:36] Timing 23 iterations at 1280K FFT length. Best time: 29.493 ms. [Worker #1 Oct 3 13:36] Timing 19 iterations at 1536K FFT length. Best time: 36.124 ms. [Worker #1 Oct 3 13:36] Timing 17 iterations at 1792K FFT length. Best time: 43.026 ms. [Worker #1 Oct 3 13:36] Timing 14 iterations at 2048K FFT length. Best time: 47.782 ms. [Worker #1 Oct 3 13:36] Timing 11 iterations at 2560K FFT length. Best time: 62.770 ms. [Worker #1 Oct 3 13:36] Timing 10 iterations at 3072K FFT length. Best time: 77.013 ms. [Worker #1 Oct 3 13:36] Timing 10 iterations at 3584K FFT length. Best time: 91.654 ms. [Worker #1 Oct 3 13:36] Timing 10 iterations at 4096K FFT length. Best time: 102.566 ms. [Worker #1 Oct 3 13:36] Timing 10 iterations at 5120K FFT length. Best time: 130.828 ms. [Worker #1 Oct 3 13:36] Timing 10 iterations at 6144K FFT length. Best time: 158.877 ms. [Worker #1 Oct 3 13:36] Timing 10 iterations at 7168K FFT length. Best time: 193.376 ms. [Worker #1 Oct 3 13:36] Timing 10 iterations at 8192K FFT length. Best time: 212.379 ms. [Worker #1 Oct 3 13:36] Timing FFTs using 2 threads. [Worker #1 Oct 3 13:36] Timing 39 iterations at 768K FFT length. Best time: 9.222 ms. [Worker #1 Oct 3 13:36] Timing 34 iterations at 896K FFT length. Best time: 11.053 ms. [Worker #1 Oct 3 13:36] Timing 29 iterations at 1024K FFT length. Best time: 13.235 ms. [Worker #1 Oct 3 13:36] Timing 23 iterations at 1280K FFT length. Best time: 15.468 ms. [Worker #1 Oct 3 13:36] Timing 19 iterations at 1536K FFT length. Best time: 19.167 ms. [Worker #1 Oct 3 13:36] Timing 17 iterations at 1792K FFT length. Best time: 22.509 ms. [Worker #1 Oct 3 13:36] Timing 14 iterations at 2048K FFT length. Best time: 25.278 ms. [Worker #1 Oct 3 13:36] Timing 11 iterations at 2560K FFT length. Best time: 33.295 ms. [Worker #1 Oct 3 13:36] Timing 10 iterations at 3072K FFT length. Best time: 40.454 ms. [Worker #1 Oct 3 13:37] Timing 10 iterations at 3584K FFT length. Best time: 48.145 ms. [Worker #1 Oct 3 13:37] Timing 10 iterations at 4096K FFT length. Best time: 53.886 ms. [Worker #1 Oct 3 13:37] Timing 10 iterations at 5120K FFT length. Best time: 69.289 ms. [Worker #1 Oct 3 13:37] Timing 10 iterations at 6144K FFT length. Best time: 85.362 ms. [Worker #1 Oct 3 13:37] Timing 10 iterations at 7168K FFT length. Best time: 103.101 ms. [Worker #1 Oct 3 13:37] Timing 10 iterations at 8192K FFT length. Best time: 116.227 ms. |
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2007-10-17, 10:53
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#298 |
Apr 2003
Berlin, Germany
36110 Posts |
Here is a first Barcelona result:
Code:
Quad-Core AMD Opteron(tm) Processor 2347 CPU speed: 1909.87 MHz, 8 cores CPU features: RDTSC, CMOV, Prefetch, 3DNow!, MMX, SSE, SSE2 L1 cache size: 64 KB L2 cache size: 512 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes L1 TLBS: 48 L2 TLBS: 512 Prime95 32-bit version 25.5, RdtscTiming=1 Best time for 768K FFT length: 27.935 ms. Best time for 896K FFT length: 33.206 ms. Best time for 1024K FFT length: 37.916 ms. Best time for 1280K FFT length: 46.703 ms. Best time for 1536K FFT length: 58.223 ms. Best time for 1792K FFT length: 69.253 ms. Best time for 2048K FFT length: 78.543 ms. Best time for 2560K FFT length: 103.744 ms. Best time for 3072K FFT length: 126.878 ms. Best time for 3584K FFT length: 148.956 ms. Best time for 4096K FFT length: 170.245 ms. Best time for 5120K FFT length: 219.297 ms. Best time for 6144K FFT length: 267.964 ms. Best time for 7168K FFT length: 324.853 ms. Best time for 8192K FFT length: 370.556 ms. Timing FFTs using 2 threads. Best time for 768K FFT length: 16.163 ms. Best time for 896K FFT length: 23.021 ms. Best time for 1024K FFT length: 26.109 ms. Best time for 1280K FFT length: 31.032 ms. Best time for 1536K FFT length: 37.103 ms. Best time for 1792K FFT length: 43.269 ms. Best time for 2048K FFT length: 49.260 ms. Best time for 2560K FFT length: 66.193 ms. Best time for 3072K FFT length: 79.358 ms. Best time for 3584K FFT length: 92.148 ms. Best time for 4096K FFT length: 105.078 ms. Best time for 5120K FFT length: 130.060 ms. Best time for 6144K FFT length: 161.614 ms. Best time for 7168K FFT length: 195.442 ms. Best time for 8192K FFT length: 221.939 ms. Timing FFTs using 3 threads. Best time for 768K FFT length: 13.809 ms. Best time for 896K FFT length: 21.811 ms. Best time for 1024K FFT length: 24.318 ms. Best time for 1280K FFT length: 28.503 ms. Best time for 1536K FFT length: 33.089 ms. Best time for 1792K FFT length: 37.643 ms. Best time for 2048K FFT length: 42.105 ms. Best time for 2560K FFT length: 59.491 ms. Best time for 3072K FFT length: 68.819 ms. Best time for 3584K FFT length: 78.486 ms. Best time for 4096K FFT length: 87.776 ms. Best time for 5120K FFT length: 96.075 ms. Best time for 6144K FFT length: 115.049 ms. Best time for 7168K FFT length: 134.383 ms. Best time for 8192K FFT length: 152.169 ms. Timing FFTs using 4 threads. Best time for 768K FFT length: 12.659 ms. Best time for 896K FFT length: 20.397 ms. Best time for 1024K FFT length: 22.734 ms. Best time for 1280K FFT length: 26.702 ms. Best time for 1536K FFT length: 30.707 ms. Best time for 1792K FFT length: 34.792 ms. Best time for 2048K FFT length: 38.922 ms. Best time for 2560K FFT length: 55.094 ms. Best time for 3072K FFT length: 63.479 ms. Best time for 3584K FFT length: 72.257 ms. Best time for 4096K FFT length: 80.775 ms. Best time for 5120K FFT length: 87.718 ms. Best time for 6144K FFT length: 104.854 ms. Best time for 7168K FFT length: 121.390 ms. Best time for 8192K FFT length: 136.810 ms. Timing FFTs using 5 threads. [Wed Oct 17 02:55:20 2007] Best time for 768K FFT length: 12.210 ms. Best time for 896K FFT length: 20.615 ms. Best time for 1024K FFT length: 22.624 ms. Best time for 1280K FFT length: 26.663 ms. Best time for 1536K FFT length: 31.017 ms. Best time for 1792K FFT length: 34.802 ms. Best time for 2048K FFT length: 38.889 ms. Best time for 2560K FFT length: 55.187 ms. Best time for 3072K FFT length: 64.065 ms. Best time for 3584K FFT length: 72.070 ms. Best time for 4096K FFT length: 79.979 ms. Best time for 5120K FFT length: 87.083 ms. Best time for 6144K FFT length: 103.475 ms. Best time for 7168K FFT length: 120.259 ms. Best time for 8192K FFT length: 135.915 ms. Timing FFTs using 6 threads. Best time for 768K FFT length: 11.827 ms. Best time for 896K FFT length: 20.350 ms. Best time for 1024K FFT length: 22.470 ms. Best time for 1280K FFT length: 26.510 ms. Best time for 1536K FFT length: 30.388 ms. Best time for 1792K FFT length: 34.276 ms. Best time for 2048K FFT length: 38.393 ms. Best time for 2560K FFT length: 55.001 ms. Best time for 3072K FFT length: 62.357 ms. Best time for 3584K FFT length: 70.534 ms. Best time for 4096K FFT length: 78.571 ms. Best time for 5120K FFT length: 85.249 ms. Best time for 6144K FFT length: 101.560 ms. Best time for 7168K FFT length: 117.729 ms. Best time for 8192K FFT length: 132.915 ms. Timing FFTs using 7 threads. Best time for 768K FFT length: 11.377 ms. Best time for 896K FFT length: 20.030 ms. Best time for 1024K FFT length: 22.347 ms. Best time for 1280K FFT length: 26.278 ms. Best time for 1536K FFT length: 30.107 ms. Best time for 1792K FFT length: 33.871 ms. Best time for 2048K FFT length: 37.850 ms. Best time for 2560K FFT length: 53.885 ms. Best time for 3072K FFT length: 61.956 ms. Best time for 3584K FFT length: 70.095 ms. Best time for 4096K FFT length: 77.744 ms. Best time for 5120K FFT length: 84.498 ms. Best time for 6144K FFT length: 100.272 ms. Best time for 7168K FFT length: 116.577 ms. Best time for 8192K FFT length: 131.545 ms. Timing FFTs using 8 threads. Best time for 768K FFT length: 11.269 ms. Best time for 896K FFT length: 19.927 ms. Best time for 1024K FFT length: 22.092 ms. Best time for 1280K FFT length: 25.985 ms. Best time for 1536K FFT length: 29.836 ms. Best time for 1792K FFT length: 33.735 ms. Best time for 2048K FFT length: 37.738 ms. Best time for 2560K FFT length: 53.270 ms. Best time for 3072K FFT length: 61.192 ms. Best time for 3584K FFT length: 68.896 ms. Best time for 4096K FFT length: 77.015 ms. Best time for 5120K FFT length: 83.931 ms. Best time for 6144K FFT length: 99.895 ms. Best time for 7168K FFT length: 115.865 ms. Best time for 8192K FFT length: 130.881 ms. Best time for 58 bit trial factors: 6.102 ms. Best time for 59 bit trial factors: 6.116 ms. Best time for 60 bit trial factors: 6.104 ms. Best time for 61 bit trial factors: 6.127 ms. Best time for 62 bit trial factors: 11.402 ms. Best time for 63 bit trial factors: 11.376 ms. Best time for 64 bit trial factors: 11.220 ms. Best time for 65 bit trial factors: 11.166 ms. Best time for 66 bit trial factors: 11.154 ms. Best time for 67 bit trial factors: 11.135 ms. http://www.xtremesystems.org/forums/...postcount=1102 The 2 CPUs run at 1.9 GHz on a Supermicro board with memory controller at 1.6 GHz. Since there were 2 CPUs, memory latency is higher than in an 1S system. The single threaded times seem to be a bit high, although clearly lower than my X2@2 GHz. OTOH the multithreaded tests shows a different behaviour than on C2Q, very likely because of the different memory subsystem and the shared L3 cache. |
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2007-10-17, 19:59
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#299 | |
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"Oliver"
Mar 2005
Germany
11·101 Posts |
Quote:
I get ~32ms/iteration (1024k FFT) with one instance (24.14) and ~34ms/iteration when running 8 instances (24.14) on a Barcy 2347. |
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2007-10-18, 07:47
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#300 | |
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Apr 2003
Berlin, Germany
192 Posts |
Quote:
Your ~32 ms/iteration (although with an older version) brings the per clock throughput much closer to C2Q and lets the 1.9 GHz Barcelona iterate as fast as a 3.15 GHz K8 using 1 thread. Can you please post a full benchmark run of 25.5a? BTW, someone on XS posted an even faster K8 result: Code:
Here are my Results with a Athlon 64 X2 6400 @ 3500 MHz and CellShock DDR2 1000 @ 4-4-4-12 [Wed Oct 17 18:32:13 2007] Compare your results to other computers at http://www.mersenne.org/bench.htm AMD Athlon(tm) 64 X2 Dual Core Processor 6400+ CPU speed: 3499.87 MHz, 2 cores CPU features: RDTSC, CMOV, Prefetch, 3DNow!, MMX, SSE, SSE2 L1 cache size: 64 KB L2 cache size: 1024 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes L1 TLBS: 32 L2 TLBS: 512 Prime95 32-bit version 25.5, RdtscTiming=1 Best time for 768K FFT length: 21.030 ms. Best time for 896K FFT length: 25.262 ms. Best time for 1024K FFT length: 27.967 ms. Best time for 1280K FFT length: 35.763 ms. Best time for 1536K FFT length: 43.718 ms. Best time for 1792K FFT length: 52.707 ms. Best time for 2048K FFT length: 58.854 ms. Best time for 2560K FFT length: 77.593 ms. Best time for 3072K FFT length: 94.625 ms. Best time for 3584K FFT length: 114.018 ms. Best time for 4096K FFT length: 127.410 ms. Best time for 5120K FFT length: 165.333 ms. Best time for 6144K FFT length: 201.588 ms. Best time for 7168K FFT length: 244.321 ms. Best time for 8192K FFT length: 278.076 ms. Timing FFTs using 2 threads. Best time for 768K FFT length: 12.993 ms. Best time for 896K FFT length: 15.601 ms. Best time for 1024K FFT length: 17.517 ms. Best time for 1280K FFT length: 23.488 ms. Best time for 1536K FFT length: 28.120 ms. Best time for 1792K FFT length: 33.641 ms. Best time for 2048K FFT length: 37.514 ms. Best time for 2560K FFT length: 50.270 ms. Best time for 3072K FFT length: 60.128 ms. Best time for 3584K FFT length: 71.829 ms. Best time for 4096K FFT length: 79.863 ms. Best time for 5120K FFT length: 89.756 ms. Best time for 6144K FFT length: 111.599 ms. Best time for 7168K FFT length: 139.406 ms. Best time for 8192K FFT length: 167.504 ms. Best time for 58 bit trial factors: 3.403 ms. Best time for 59 bit trial factors: 3.436 ms. Best time for 60 bit trial factors: 3.420 ms. Best time for 61 bit trial factors: 3.436 ms. Best time for 62 bit trial factors: 6.236 ms. Best time for 63 bit trial factors: 6.233 ms. Best time for 64 bit trial factors: 7.895 ms. Best time for 65 bit trial factors: 7.840 ms. Best time for 66 bit trial factors: 7.858 ms. Best time for 67 bit trial factors: 7.845 ms. |
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