mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Software

Reply
 
Thread Tools
Old 2011-12-08, 20:28   #12
Brain
 
Brain's Avatar
 
Dec 2009
Peine, Germany

5138 Posts
Default Very silent here

Rehighlightening this thread:
DC going well, ETA Dec 14:
Code:
[Main thread Dec 8 18:22] Mersenne number primality test program version 27.1
[Main thread Dec 8 18:22] Optimizing for CPU architecture: Core i3/i5/i7, L2 cache size: 256 KB, L3 cache size: 6 MB
[Work thread Dec 8 18:23] Setting affinity to run worker on any logical CPU.
[Work thread Dec 8 18:23] Setting affinity to run helper thread 1 on any logical CPU.
[Work thread Dec 8 18:23] Setting affinity to run helper thread 2 on any logical CPU.
[Work thread Dec 8 18:23] Resuming primality test of M26451023 using AVX Core2 type-3 FFT length 1536K, Pass1=384, Pass2=4K, 3 threads
[Work thread Dec 8 21:23] Iteration: 7020000 / 26451023 [26.53%].  Per iteration time: 0.019 sec.
Brain is offline   Reply With Quote
Old 2011-12-10, 14:31   #13
monst
 
monst's Avatar
 
Mar 2007

179 Posts
Default

M27515261 was successfully verified with v27.1, build 1:

http://www.mersenne.org/report_expon...&B1=Get+status

I have 3 more in the queue.
monst is offline   Reply With Quote
Old 2011-12-10, 20:15   #14
MrHappy
 
MrHappy's Avatar
 
Dec 2003
Paisley Park & Neverland

5·37 Posts
Default

DC of M27787667 was successful with 27.1
MrHappy is offline   Reply With Quote
Old 2011-12-11, 07:51   #15
LaurV
Romulan Interpreter
 
LaurV's Avatar
 
Jun 2011
Thailand

2×3×7×233 Posts
Default

Four expos in range 25.1M to 27.8M were:
-partially DC-ed with P95 v26
-stopped when the new version appeared, at "scores" between 30% done and 68% done
-continued with the new version P95 v27
All residues matched.
Another 4 expos are under the same test (they were all 8 stopped somewhere in the middle when the new version appeared, and I continued on them in two "lots" of 4 expos each, with the new vesion).
LaurV is offline   Reply With Quote
Old 2011-12-11, 10:59   #16
Ralf Recker
 
Ralf Recker's Avatar
 
Oct 2010

191 Posts
Default Started one double check

Code:
[Dec 11 11:58] Iteration: 850000 / 26154413 [3.24%].  Per iteration time: 0.005 sec.
Ralf Recker is offline   Reply With Quote
Old 2011-12-11, 11:35   #17
LaurV
Romulan Interpreter
 
LaurV's Avatar
 
Jun 2011
Thailand

2·3·7·233 Posts
Default

How in the seven seas did you get that 5 milisexes ??!?!?
I can't go so low even if I run 8 cores for one assignment, and I dare to say that I have a good CPU, running at 3.4 gigs...

Code:
[Dec 11 18:31:30] Resuming primality test of M25154581 using AVX Core2 type-3 FFT length 1536K, Pass1=384, Pass2=4K, 8 threads
[Dec 11 18:31:30] Iteration: 10867978 / 25154581 [43.20%].
[Dec 11 18:31:40] Iteration: 10870000 / 25154581 [43.21%].  Per iteration time: 5.177 ms.
[Dec 11 18:32:32] Iteration: 10880000 / 25154581 [43.25%].  Per iteration time: 5.215 ms.

Last fiddled with by LaurV on 2011-12-11 at 11:37
LaurV is offline   Reply With Quote
Old 2011-12-11, 12:12   #18
Ralf Recker
 
Ralf Recker's Avatar
 
Oct 2010

191 Posts
Default

Quote:
Originally Posted by LaurV View Post
How in the seven seas did you get that 5 milisexes ??!?!?
I started one DC with 4 threads after some extra torture tests to make sure that the CPU is able to handle the additional(?) load of the AVX FFTs. The extra gain from running more than 3 threads is neglectable (a.k.a. zero ) so I switched to running 2 DCs with 2 threads each to improve the throughput a little bit...

Code:
[Dec 11 13:13] Iteration: 1570000 / 26154413 [6.00%].  Per iteration time: 0.007 sec.
and

Code:
[Dec 11 13:15] Iteration: 190000 / 28706551 [0.66%].  Per iteration time: 0.007 sec.

Last fiddled with by Ralf Recker on 2011-12-11 at 12:16
Ralf Recker is offline   Reply With Quote
Old 2011-12-11, 13:54   #19
LaurV
Romulan Interpreter
 
LaurV's Avatar
 
Jun 2011
Thailand

2×3×7×233 Posts
Default

I would really like to see the microseconds on that one, could you add the TimeStamp=2 and the TimingOutput=4 switches to prime.txt and repost? That is quite interesting, with 2 workers I get 10 ms (!?) and can't go lower. What frequency is your CPU?
LaurV is offline   Reply With Quote
Old 2011-12-11, 14:50   #20
Ralf Recker
 
Ralf Recker's Avatar
 
Oct 2010

191 Posts
Default

Quote:
Originally Posted by LaurV View Post
I would really like to see the microseconds on that one, could you add the TimeStamp=2 and the TimingOutput=4 switches to prime.txt and repost? That is quite interesting, with 2 workers I get 10 ms (!?) and can't go lower. What frequency is your CPU?
4.4 GHz - The multiplier is set to 45x for the first turbo mode step but it's pretty obvious why it doesn't kick in. Here are the timings:

Code:
[Dec 11 15:26:41] Iteration: 2510000 / 26154413 [9.59%].  Per iteration time: 7.413 ms.
[Dec 11 15:27:55] Iteration: 2520000 / 26154413 [9.63%].  Per iteration time: 7.352 ms.
[Dec 11 15:29:08] Iteration: 2530000 / 26154413 [9.67%].  Per iteration time: 7.318 ms.
[Dec 11 15:30:21] Iteration: 2540000 / 26154413 [9.71%].  Per iteration time: 7.327 ms.
[Dec 11 15:31:35] Iteration: 2550000 / 26154413 [9.74%].  Per iteration time: 7.337 ms.
[Dec 11 15:32:48] Iteration: 2560000 / 26154413 [9.78%].  Per iteration time: 7.360 ms.
Code:
[Dec 11 15:25:51] Iteration: 1110000 / 28706551 [3.86%].  Per iteration time: 7.566 ms.
[Dec 11 15:27:06] Iteration: 1120000 / 28706551 [3.90%].  Per iteration time: 7.482 ms.
[Dec 11 15:28:20] Iteration: 1130000 / 28706551 [3.93%].  Per iteration time: 7.358 ms.
[Dec 11 15:29:33] Iteration: 1140000 / 28706551 [3.97%].  Per iteration time: 7.297 ms.
[Dec 11 15:30:46] Iteration: 1150000 / 28706551 [4.00%].  Per iteration time: 7.326 ms.
[Dec 11 15:31:59] Iteration: 1160000 / 28706551 [4.04%].  Per iteration time: 7.352 ms.
At 3.4 GHz that would be ca. 9.52-9.53 ms per iteration. Of course the timings are a bit distorted by a bunch of background tasks running on the box (including a Linux VM).
Ralf Recker is offline   Reply With Quote
Old 2011-12-11, 15:14   #21
monst
 
monst's Avatar
 
Mar 2007

17910 Posts
Default

2 for 2:

The residues match for M27816601.
monst is offline   Reply With Quote
Old 2011-12-11, 17:21   #22
TheJudger
 
TheJudger's Avatar
 
"Oliver"
Mar 2005
Germany

111110 Posts
Default

Quote:
Originally Posted by Prime95 View Post
...
If there is demand, I could also create a 32-bit mprime (would that run on a 64-bit Linux install)?
If it doesn't take too much of your time why not giving a try? With a x86-64 kernel and a x86/x86-64 userland it should work.

Oliver
TheJudger is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Prime95 beta version 28.4 Prime95 Software 20 2014-03-02 02:51
Prime95 beta version 28.3 Prime95 Software 68 2014-02-23 05:42
Beta version 24.12 available Prime95 Software 33 2005-06-14 13:19
Early Beta of version 24.11 Prime95 Software 113 2005-05-24 17:05
Announcing the release of Triance OS 1.0-BETA zariss Linux 1 2004-08-23 21:42

All times are UTC. The time now is 22:26.


Fri Oct 22 22:26:20 UTC 2021 up 91 days, 16:55, 0 users, load averages: 2.57, 2.16, 2.29

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.