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Old 2020-12-04, 12:06   #1
dabler
 
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"David Barina"
Jul 2016
Brno

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Default mprime crashed

I just encountered the following behavior:

[Work thread Dec 4 12:51] Iteration: 102190000 / 109258157 [93.53%], ms/iter: 5.847, ETA: 11:28:49
[Work thread Dec 4 12:51] Hardware errors have occurred during the test!
[Work thread Dec 4 12:51] 1 Gerbicz/double-check error.
[Work thread Dec 4 12:51] Confidence in final result is excellent.
Neoprávněný přístup do paměti (SIGSEGV)


and the dmesg tells:

[92055.665252] traps: mprime[12021] general protection fault ip:b8ec18 sp:7fcb7be36d20 error:0
[92055.665260] traps: mprime[12024] general protection fault ip:b8ec18 sp:7fcb87e4ed20 error:0
[92055.665265] in mprime[400000+229a000]
[92055.665265] in mprime[400000+229a000]
[92055.665299] traps: mprime[12023] general protection fault ip:b8ec18 sp:7fcb8864fd20 error:0


There seems to be a bug in the mprime.
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Old 2020-12-04, 17:20   #2
VBCurtis
 
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"Curtis"
Feb 2005
Riverside, CA

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When you say "bug in mprime", you mean "problem with my hardware."

That's why the message tells you "hardware error."

Most common is a buildup of dust in your case, leading to temperatures high enough to cause an occasional miscalculation. Faulty memory is also possible, but a bit less likely than a heat problem.
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Old 2020-12-04, 17:31   #3
dabler
 
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"David Barina"
Jul 2016
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I have no objection to hardware errors. My problem is the SIGSEGV that I get after 90% of the test.
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Old 2020-12-04, 17:41   #4
kruoli
 
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"Oliver"
Sep 2017
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Is the error reproducible and occurs always on the same iteration?
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Old 2020-12-04, 18:33   #5
dabler
 
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"David Barina"
Jul 2016
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I tried it several times, and it always crashed around 92 or 93%. No crash below 90 %.
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Old 2020-12-04, 20:07   #6
Prime95
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Try running a torture test.
Or try reducing the memory speed or overvolt it slightly.
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Old 2020-12-05, 16:40   #7
chris2be8
 
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Exactly which version of mprime are you running? Where did you get it from? And output from uname -a and cat /etc/os-release to say what Linux distro and level you have might also be useful.

Chris
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Old 2020-12-05, 16:50   #8
dabler
 
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"David Barina"
Jul 2016
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mprime version 30.3b6.

uname -a gives
Linux dabler 5.4.60-gentoo-9 #1 SMP Thu Aug 27 12:07:40 CEST 2020 x86_64 AMD Ryzen Threadripper 2990WX 32-Core Processor AuthenticAMD GNU/Linux

and cat /etc/os-release gives
NAME=Gentoo
ID=gentoo
PRETTY_NAME="Gentoo/Linux"
ANSI_COLOR="1;32"
HOME_URL="https://www.gentoo.org/"
SUPPORT_URL="https://www.gentoo.org/support/"
BUG_REPORT_URL="https://bugs.gentoo.org/"
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Old 2020-12-06, 08:46   #9
retina
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Quote:
Originally Posted by dabler View Post
Hardware errors have occurred during the test!
When you have a hardware problem then anything can happen (program crashes, wrong answers, reboots, HDD reformat, etc.). So there is no point in talking about the software or the OS and any other "soft" problem until you fix the hardware.

So, fix you hardware first before doing anything else.
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Old 2020-12-06, 16:36   #10
dabler
 
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"David Barina"
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I managed to get over the magic limit of 92% -- 93% and complete the test. And the result seems to be correct: https://www.mersenne.org/report_expo...9258157&full=1
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