Prime95 version 26.5 - Page 9

Prime95 · 2011-02-22, 01:53

Quote:

Originally Posted by James Heinrich

Whereas 26.5.3 made no complaints, v26.5.4 now says (for an i7-920):Also, there's a typo "assigni" in undoc.txt (AffinityScramble2 section).

Set DebugAffinityScramble=1 in prime.txt and let me know what happens

James Heinrich · 2011-02-22, 01:59

Quote:

Originally Posted by Prime95

Set DebugAffinityScramble=1 in prime.txt and let me know what happens

Code:

Mersenne number primality test program version 26.5
Optimizing for CPU architecture: Core i3/i5/i7, L2 cache size: 256 KB, L3 cache size: 8 MB
Test clocks: 95248
Logical CPU 1 clocks: 98237
Logical CPU 2 clocks: 95248
Logical CPU 3 clocks: 95248
Logical CPU 4 clocks: 95265
Logical CPU 5 clocks: 95283
Logical CPU 6 clocks: 95248
Logical CPU 7 clocks: 95248
Test clocks: 95248
Logical CPU 2 clocks: 95248
Logical CPU 3 clocks: 95248
Logical CPU 4 clocks: 95245
Logical CPU 5 clocks: 95248
Logical CPU 6 clocks: 95265
Logical CPU 7 clocks: 95248
Test clocks: 95265
Logical CPU 3 clocks: 182924
Test clocks: 95248
Logical CPU 5 clocks: 98163
Logical CPU 6 clocks: 95248
Logical CPU 7 clocks: 95248
Unable to detect some of the hyperthreaded logical CPUs.
See AffinityScramble2 in undoc.txt.
Starting workers.

Prime95 · 2011-02-22, 02:29

Interesting. You're in luck. Prime95's default is to assume logical 0,1 are one physical CPU, 2 and 3, 4 and 5, and 6 and 7. From your output, 2 and 3 clearly are one physical CPU. Thus you don't need to mess with AffinityScramble2.

My i7-860 is detected properly on Linux and Windows XP 64-bit. What's weird is that Linux numbers the logical CPUs differently than Windows.

v26.5b3 was not counting clocks properly on Windows. It was always getting a count of 0. When it tested the next logical processor, it also got a count of zero. Since that's twice as slow, it thought the two logicals made up one physical.

I don't know how to proceed. For now, I'll just gather more data unless a brainstorm hits me.

KingKurly · 2011-02-22, 02:55

Running a benchmark seems to crash ("Illegal instruction") on the Linux 32-bit build. I recall seeing the crash in build 3 and 4; have not retested earlier builds, but I do know that the machine has run benchmarks before. Benchmark does work on Linux 64-bit and Windows 32-bit.

The machine in question is a dual PIII 1.4GHz, and it is using Slackware 13.1.

Let me know if you need additional information or for me to run with special settings on that machine.

Prime95 · 2011-02-22, 03:24

Quote:

Originally Posted by KingKurly

Running a benchmark seems to crash ("Illegal instruction") on the Linux 32-bit build.

Can you tell me the last text output prior to the seg fault?

KingKurly · 2011-02-22, 05:45

Quote:

Originally Posted by Prime95

Can you tell me the last text output prior to the seg fault?

Sure, here it is. Let me know if there's anything else I can do.

Code:

kurly@slice:~$ mprime/mprime -m
[Main thread Feb 22 00:38] Mersenne number primality test program version 26.5
[Main thread Feb 22 00:38] Optimizing for CPU architecture: Pre-SSE2, L2 cache size: 512 KB
         Main Menu

     1.  Test/Primenet
     2.  Test/Worker threads
     3.  Test/Status
     4.  Test/Continue
     5.  Test/Exit
     6.  Advanced/Test
     7.  Advanced/Time
     8.  Advanced/P-1
     9.  Advanced/ECM
    10.  Advanced/Manual Communication
    11.  Advanced/Unreserve Exponent
    12.  Advanced/Quit Gimps
    13.  Options/CPU
    14.  Options/Preferences
    15.  Options/Torture Test
    16.  Options/Benchmark
    17.  Help/About
    18.  Help/About PrimeNet Server
Your choice: 16


Hit enter to continue: [Main thread Feb 22 00:38] Starting worker.
[Worker #1 Feb 22 00:38] Worker starting
[Worker #1 Feb 22 00:38] Your timings will be written to the results.txt file.
[Worker #1 Feb 22 00:38] Compare your results to other computers at http://www.mersenne.org/report_benchmarks
Illegal instruction

Prime95 · 2011-02-22, 07:07

Build 5 available. Fixes the dual-core non-SSE2 benchmark crash

2011-02-22, 10:17

I am trying to use the new build and register a new computer using the 26.5 version and all i am getting is the following

[Main thread Feb 22 10:03] Mersenne number primality test program version 26.5
[Main thread Feb 22 10:03] Optimizing for CPU architecture: Core i3/i5/i7, L2 cache size: 256 KB, L3 cache size: 3 MB
[Main thread Feb 22 10:03] Logical CPUs 0,1 form one physical CPU.
[Main thread Feb 22 10:03] Logical CPUs 2,3 form one physical CPU.
[Main thread Feb 22 10:04] Starting workers.
[Comm thread Feb 22 10:04] Updating computer information on the server
[Comm thread Feb 22 10:04] PrimeNet error 9: Access denied
[Comm thread Feb 22 10:04] Untrusted program versions currently excluded by PrimeNet
[Comm thread Feb 22 10:04] Visit http://mersenneforum.org for help.
[Comm thread Feb 22 10:04] Will try contacting server again in 70 minutes.

Has the new software been activated to work on the servers?

Jeff Gilchrist · 2011-02-22, 12:17

Hi George,

You had mentioned previously that for 26.5 you would update Prime95 to delete the P-1 save and backup files when they are finished being processed (or have a switch to do that). Was that complete?

The 26.5b3 client seems to be leaving them around still. Is there a switch I should be using or did you not have time to implement that?

Thanks,
Jeff.

Prime95 · 2011-02-22, 16:10

Quote:

Originally Posted by Jeff Gilchrist

You had mentioned previously that for 26.5 you would update Prime95 to delete the P-1 save and backup files when they are finished being processed (or have a switch to do that). Was that complete?

undoc.txt, KeepPminus1SaveFiles.

Commaster · 2011-02-22, 16:16

Logical CPUs detection is clearly broken in b5, compared to b3 (I missed b4).
Using Core-i7 920 with Windows 7 x64:

Quote:

Optimizing for CPU architecture: Core i3/i5/i7, L2 cache size: 256 KB, L3 cache size: 8 MB
Unable to detect some of the hyperthreaded logical CPUs.

DebugAffinityScramble=1:

Quote:

Optimizing for CPU architecture: Core i3/i5/i7, L2 cache size: 256 KB, L3 cache size: 8 MB
Test clocks: 143255
Logical CPU 1 clocks: 147635
Logical CPU 2 clocks: 143280
Logical CPU 3 clocks: 142890
Logical CPU 4 clocks: 142890
Logical CPU 5 clocks: 142890
Logical CPU 6 clocks: 142890
Logical CPU 7 clocks: 142890
Test clocks: 144740
Logical CPU 2 clocks: 142965
Logical CPU 3 clocks: 142890
Logical CPU 4 clocks: 142890
Logical CPU 5 clocks: 142890
Logical CPU 6 clocks: 142890
Logical CPU 7 clocks: 142925
Test clocks: 142890
Logical CPU 3 clocks: 281945
Test clocks: 142890
Logical CPU 5 clocks: 275055
Unable to detect some of the hyperthreaded logical CPUs.

James Heinrich, I'd count this post as an addition to help George gather more data...

2011-02-22, 02:29	#91
Prime95 P90 years forever! Aug 2002 Yeehaw, FL 17×487 Posts	Interesting. You're in luck. Prime95's default is to assume logical 0,1 are one physical CPU, 2 and 3, 4 and 5, and 6 and 7. From your output, 2 and 3 clearly are one physical CPU. Thus you don't need to mess with AffinityScramble2. My i7-860 is detected properly on Linux and Windows XP 64-bit. What's weird is that Linux numbers the logical CPUs differently than Windows. v26.5b3 was not counting clocks properly on Windows. It was always getting a count of 0. When it tested the next logical processor, it also got a count of zero. Since that's twice as slow, it thought the two logicals made up one physical. I don't know how to proceed. For now, I'll just gather more data unless a brainstorm hits me. Last fiddled with by Prime95 on 2011-04-04 at 04:20

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2011-02-22, 02:55	#92
KingKurly Sep 2010 Annapolis, MD, USA 2×3²×11 Posts	Running a benchmark seems to crash ("Illegal instruction") on the Linux 32-bit build. I recall seeing the crash in build 3 and 4; have not retested earlier builds, but I do know that the machine has run benchmarks before. Benchmark does work on Linux 64-bit and Windows 32-bit. The machine in question is a dual PIII 1.4GHz, and it is using Slackware 13.1. Let me know if you need additional information or for me to run with special settings on that machine.

2011-02-22, 07:07	#95
Prime95 P90 years forever! Aug 2002 Yeehaw, FL 17×487 Posts	Build 5 available. Fixes the dual-core non-SSE2 benchmark crash

2011-02-22, 10:17	#96
oilwarzonedotco 3·2,083 Posts	I am trying to use the new build and register a new computer using the 26.5 version and all i am getting is the following [Main thread Feb 22 10:03] Mersenne number primality test program version 26.5 [Main thread Feb 22 10:03] Optimizing for CPU architecture: Core i3/i5/i7, L2 cache size: 256 KB, L3 cache size: 3 MB [Main thread Feb 22 10:03] Logical CPUs 0,1 form one physical CPU. [Main thread Feb 22 10:03] Logical CPUs 2,3 form one physical CPU. [Main thread Feb 22 10:04] Starting workers. [Comm thread Feb 22 10:04] Updating computer information on the server [Comm thread Feb 22 10:04] PrimeNet error 9: Access denied [Comm thread Feb 22 10:04] Untrusted program versions currently excluded by PrimeNet [Comm thread Feb 22 10:04] Visit http://mersenneforum.org for help. [Comm thread Feb 22 10:04] Will try contacting server again in 70 minutes. Has the new software been activated to work on the servers?

2011-02-22, 12:17	#97
Jeff Gilchrist Jun 2003 Ottawa, Canada 1173₁₀ Posts	Hi George, You had mentioned previously that for 26.5 you would update Prime95 to delete the P-1 save and backup files when they are finished being processed (or have a switch to do that). Was that complete? The 26.5b3 client seems to be leaving them around still. Is there a switch I should be using or did you not have time to implement that? Thanks, Jeff.