From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark H Weaver <mhw@netris.org>
Subject: bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
Date: Wed, 07 Oct 2015 08:45:09 -0400
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In-Reply-To: <87egh7b0p0.fsf@gnu.org> ("Ludovic
	\=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\=
	\=\?utf-8\?Q\?s\?\= message of "Wed, 07 Oct 2015 09:24:43 +0200")
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To: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: 21620@debbugs.gnu.org, Andreas Enge <andreas.enge@inria.fr>

ludo@gnu.org (Ludovic Court=C3=A8s) writes:

> Mark H Weaver <mhw@netris.org> skribis:
>
>> ludo@gnu.org (Ludovic Court=C3=A8s) writes:
>>
>>> tg@gmplib.org (Torbj=C3=B6rn Granlund) skribis:
>>>
>>>> This is most surely a hardware problem.  The most common such problem =
is
>>>> a bad RAM chip.
>>>
>>> OK, I=E2=80=99ll see if I can reproduce it on another ARMv7 machine and
>>> report back.
>>>
>>> However, the machine in question is a build machine and it would be
>>> surprising for the RAM issue to manifest only for this program.
>>
>> Do we have a record of which build slave performed the failed build?
>
> Yes, it was on enge.fr.  Could you try on your Novena?

When used as a build slave, the Novena is prone to overheating.  The
best solution is to add a fan.  In the meantime, I've disabled 2 out of
the 4 cores on hydra-slave1 using the following commands:

  echo 0 > /sys/devices/system/cpu/cpu2/online
  echo 0 > /sys/devices/system/cpu/cpu3/online

      Mark