* bug#21620: GMP 6.0.0a intermittent test failure on armhf
@ 2015-10-05 14:33 Ludovic Courtès
2015-10-05 15:44 ` bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu Ludovic Courtès
0 siblings, 1 reply; 16+ messages in thread
From: Ludovic Courtès @ 2015-10-05 14:33 UTC (permalink / raw)
To: 21620
‘tests/mpz/reuse’ intermittently fails on armhf:
http://hydra.gnu.org/build/704686/nixlog/1/raw
Running this program in a loop easily reproduces the problem, but not
deterministically (different parts fail.)
Ludo’.
^ permalink raw reply [flat|nested] 16+ messages in thread
* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-05 14:33 bug#21620: GMP 6.0.0a intermittent test failure on armhf Ludovic Courtès
@ 2015-10-05 15:44 ` Ludovic Courtès
2015-10-06 12:48 ` Torbjörn Granlund
0 siblings, 1 reply; 16+ messages in thread
From: Ludovic Courtès @ 2015-10-05 15:44 UTC (permalink / raw)
To: gmp-bugs; +Cc: 21620, Andreas Enge
[-- Attachment #1: Type: text/plain, Size: 1492 bytes --]
Hello,
We observe that ‘tests/mpz/reuse’ from GMP 6.0.0 occasionally fails on
GNU/Linux on ARMv7 (hard-float ABI.)
We are building with GCC 4.9.3, using libc 2.22, and configuring with:
--enable-fat --enable-cxx --build=arm-unknown-linux-gnueabihf
Additional system info:
--8<---------------cut here---------------start------------->8---
$ ./config.guess
neon
neon
neon
neon-unknown-linux-gnueabihf
$ ./configfsf.guess
armv7l-unknown-linux-gnueabihf
$ uname -srmpi
Linux 3.19.0-00273-ge3b61d5 armv7l unknown unknown
$ cat /proc/cpuinfo
processor : 0
model name : ARMv7 Processor rev 10 (v7l)
BogoMIPS : 9.09
Features : half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpd32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x2
CPU part : 0xc09
CPU revision : 10
[...]
Hardware : Freescale i.MX6 Quad/DualLite (Device Tree)
Revision : 0000
Serial : 0000000000000000
--8<---------------cut here---------------end--------------->8---
Example build log:
http://hydra.gnu.org/build/704686/nixlog/1/raw
To reproduce the problem, run this command long enough:
while ./tests/mpz/reuse ; do : ; done
Usually the failure comes up after one or two iterations.
After removing occurrences of “0 &&” in the ‘dump’ function of reuse.c.
The attached files show the output for two different failures
(mpz_tdiv_qr and mpz_mul.)
Thanks,
Ludo’.
[-- Attachment #2: first log --]
[-- Type: text/plain, Size: 564361 bytes --]
failure in mpz_tdiv_qr (-7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF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[-- Attachment #3: second log --]
[-- Type: text/plain, Size: 1239405 bytes --]
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^ permalink raw reply [flat|nested] 16+ messages in thread
* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-05 15:44 ` bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu Ludovic Courtès
@ 2015-10-06 12:48 ` Torbjörn Granlund
2015-10-06 16:20 ` Ludovic Courtès
0 siblings, 1 reply; 16+ messages in thread
From: Torbjörn Granlund @ 2015-10-06 12:48 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: gmp-bugs
This is most surely a hardware problem. The most common such problem is
a bad RAM chip.
Without special undocumented parameters, GMP's test suite runs the same
exact test vectors for each invocation, and GMP uses just plain old
deterministic algortihms internally.
--
Torbjörn
Please encrypt, key id 0xC8601622
^ permalink raw reply [flat|nested] 16+ messages in thread
* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-06 12:48 ` Torbjörn Granlund
@ 2015-10-06 16:20 ` Ludovic Courtès
2015-10-07 2:09 ` Mark H Weaver
2015-10-07 14:28 ` Torbjörn Granlund
0 siblings, 2 replies; 16+ messages in thread
From: Ludovic Courtès @ 2015-10-06 16:20 UTC (permalink / raw)
To: tg; +Cc: gmp-bugs, 21620, Andreas Enge
tg@gmplib.org (Torbjörn Granlund) skribis:
> This is most surely a hardware problem. The most common such problem is
> a bad RAM chip.
OK, I’ll 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.
Thanks,
Ludo’.
PS: Please keep 21620@debbugs.gnu.org Cc’d.
^ permalink raw reply [flat|nested] 16+ messages in thread
* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-06 16:20 ` Ludovic Courtès
@ 2015-10-07 2:09 ` Mark H Weaver
2015-10-07 7:24 ` Ludovic Courtès
2015-10-07 14:28 ` Torbjörn Granlund
1 sibling, 1 reply; 16+ messages in thread
From: Mark H Weaver @ 2015-10-07 2:09 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: 21620, Andreas Enge
[removed tg@gmplib.org and gmp-bugs@gmplib.org from the CC list]
ludo@gnu.org (Ludovic Courtès) writes:
> tg@gmplib.org (Torbjörn Granlund) skribis:
>
>> This is most surely a hardware problem. The most common such problem is
>> a bad RAM chip.
>
> OK, I’ll 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?
Mark
^ permalink raw reply [flat|nested] 16+ messages in thread* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-07 2:09 ` Mark H Weaver
@ 2015-10-07 7:24 ` Ludovic Courtès
2015-10-07 12:45 ` Mark H Weaver
0 siblings, 1 reply; 16+ messages in thread
From: Ludovic Courtès @ 2015-10-07 7:24 UTC (permalink / raw)
To: Mark H Weaver; +Cc: 21620, Andreas Enge
Mark H Weaver <mhw@netris.org> skribis:
> ludo@gnu.org (Ludovic Courtès) writes:
>
>> tg@gmplib.org (Torbjörn Granlund) skribis:
>>
>>> This is most surely a hardware problem. The most common such problem is
>>> a bad RAM chip.
>>
>> OK, I’ll 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?
TIA,
Ludo’.
^ permalink raw reply [flat|nested] 16+ messages in thread
* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-07 7:24 ` Ludovic Courtès
@ 2015-10-07 12:45 ` Mark H Weaver
2015-10-07 13:08 ` Andreas Enge
2015-10-07 20:32 ` Ludovic Courtès
0 siblings, 2 replies; 16+ messages in thread
From: Mark H Weaver @ 2015-10-07 12:45 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: 21620, Andreas Enge
ludo@gnu.org (Ludovic Courtès) writes:
> Mark H Weaver <mhw@netris.org> skribis:
>
>> ludo@gnu.org (Ludovic Courtès) writes:
>>
>>> tg@gmplib.org (Torbjörn Granlund) skribis:
>>>
>>>> This is most surely a hardware problem. The most common such problem is
>>>> a bad RAM chip.
>>>
>>> OK, I’ll 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
^ permalink raw reply [flat|nested] 16+ messages in thread* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-07 12:45 ` Mark H Weaver
@ 2015-10-07 13:08 ` Andreas Enge
2015-10-07 13:39 ` Mark H Weaver
2015-10-07 20:32 ` Ludovic Courtès
1 sibling, 1 reply; 16+ messages in thread
From: Andreas Enge @ 2015-10-07 13:08 UTC (permalink / raw)
To: Mark H Weaver; +Cc: 21620
On Wed, Oct 07, 2015 at 08:45:09AM -0400, Mark H Weaver wrote:
> 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:
Which temperature is overheating? So far, I have never reached 90°,
whereas my x86 laptop goes up to 100° (then it decreases the clock speed).
It is a pity to sacrifice half of the build power! Why not use three cores?
Andreas
^ permalink raw reply [flat|nested] 16+ messages in thread
* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-07 13:08 ` Andreas Enge
@ 2015-10-07 13:39 ` Mark H Weaver
0 siblings, 0 replies; 16+ messages in thread
From: Mark H Weaver @ 2015-10-07 13:39 UTC (permalink / raw)
To: Andreas Enge; +Cc: 21620
Andreas Enge <andreas@enge.fr> writes:
> On Wed, Oct 07, 2015 at 08:45:09AM -0400, Mark H Weaver wrote:
>> 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:
>
> Which temperature is overheating?
I don't remember. All I remember is that my Novena used to crash a lot
while doing builds, and I found a Novena forum where several users
reported overheating and the developers acknowledged the problem. Some
users have added a fan, and there are discussions on how best to do it.
There was talk of adding automatic CPU throttling to the kernel. I
think that work may already be done on one of the novena kernel branches
(maybe 3.19?).
I found that with only two cores enabled, the Novena became stable as a
build slave.
> It is a pity to sacrifice half of the build power!
Indeed, that's why I said that the best solution is to add a fan.
> Why not use three cores?
I tried reducing to three cores, but found that it still overheated
while doing parallel builds.
Mark
^ permalink raw reply [flat|nested] 16+ messages in thread
* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-07 12:45 ` Mark H Weaver
2015-10-07 13:08 ` Andreas Enge
@ 2015-10-07 20:32 ` Ludovic Courtès
2015-10-08 19:07 ` Andreas Enge
1 sibling, 1 reply; 16+ messages in thread
From: Ludovic Courtès @ 2015-10-07 20:32 UTC (permalink / raw)
To: Mark H Weaver; +Cc: 21620, Andreas Enge
Mark H Weaver <mhw@netris.org> skribis:
> ludo@gnu.org (Ludovic Courtès) writes:
>
>> Mark H Weaver <mhw@netris.org> skribis:
>>
>>> ludo@gnu.org (Ludovic Courtès) writes:
>>>
>>>> tg@gmplib.org (Torbjörn Granlund) skribis:
>>>>
>>>>> This is most surely a hardware problem. The most common such problem is
>>>>> a bad RAM chip.
>>>>
>>>> OK, I’ll 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.
Do you think it’s a likely problem? Andreas, could you try again on
your Novena with 2 cores turned off?
Thanks,
Ludo’.
^ permalink raw reply [flat|nested] 16+ messages in thread
* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-07 20:32 ` Ludovic Courtès
@ 2015-10-08 19:07 ` Andreas Enge
2015-10-09 0:53 ` Mark H Weaver
2015-10-09 8:27 ` Ludovic Courtès
0 siblings, 2 replies; 16+ messages in thread
From: Andreas Enge @ 2015-10-08 19:07 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: 21620, Andreas Enge
On Wed, Oct 07, 2015 at 10:32:43PM +0200, Ludovic Courtès wrote:
> Do you think it’s a likely problem? Andreas, could you try again on
> your Novena with 2 cores turned off?
I have trouble believing the explanation of overheating. The gmp test
suite is carried out sequentially (they are not yet using the parallel
test harness of the autotools). So one could only imagine that the build
itself was faulty, but should then the test not fail consistently afterwards?
If I understood correctly, you used one build and ran the same test
over and over again. On the other hand, since the machine also serves as a
build machine, it is possible that some other package was built at the same
time as the tests were carried out, which may have contributed to heating.
I suggest to wait until the current build frenzy has stopped with the
merge of core-updates, and then to test by hand outside guix with only
one or two cores.
Andreas
^ permalink raw reply [flat|nested] 16+ messages in thread
* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-08 19:07 ` Andreas Enge
@ 2015-10-09 0:53 ` Mark H Weaver
2015-10-09 8:27 ` Ludovic Courtès
1 sibling, 0 replies; 16+ messages in thread
From: Mark H Weaver @ 2015-10-09 0:53 UTC (permalink / raw)
To: Andreas Enge; +Cc: 21620, Andreas Enge
Andreas Enge <andreas@enge.fr> writes:
> On Wed, Oct 07, 2015 at 10:32:43PM +0200, Ludovic Courtès wrote:
>> Do you think it’s a likely problem? Andreas, could you try again on
>> your Novena with 2 cores turned off?
>
> I have trouble believing the explanation of overheating. The gmp test
> suite is carried out sequentially (they are not yet using the parallel
> test harness of the autotools). So one could only imagine that the build
> itself was faulty, but should then the test not fail consistently afterwards?
> If I understood correctly, you used one build and ran the same test
> over and over again. On the other hand, since the machine also serves as a
> build machine, it is possible that some other package was built at the same
> time as the tests were carried out, which may have contributed to heating.
Exactly.
FWIW, I looked through my archive of build failure logs, and found that
the same 'reuse' test failed around September 10th on hydra-slave1, the
Novena donated by Steve Sprang. I know that on a few occasions I forgot
to disable 2/4 cores, and that might have been one of those times.
Actually, right now hydra-slave1 has all 4 cores enabled and it seems to
be doing alright. I also built 'gmp' again on it with 4 cores, and it
passed the 'reuse' test. I aborted the build after that test passed,
and left the build directory in /tmp, so we could try running the
'reuse' test repeatedly if desired.
Mark
^ permalink raw reply [flat|nested] 16+ messages in thread* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-08 19:07 ` Andreas Enge
2015-10-09 0:53 ` Mark H Weaver
@ 2015-10-09 8:27 ` Ludovic Courtès
2015-11-20 14:53 ` Ludovic Courtès
1 sibling, 1 reply; 16+ messages in thread
From: Ludovic Courtès @ 2015-10-09 8:27 UTC (permalink / raw)
To: Andreas Enge; +Cc: 21620, Andreas Enge
Andreas Enge <andreas@enge.fr> skribis:
> On Wed, Oct 07, 2015 at 10:32:43PM +0200, Ludovic Courtès wrote:
>> Do you think it’s a likely problem? Andreas, could you try again on
>> your Novena with 2 cores turned off?
>
> I have trouble believing the explanation of overheating. The gmp test
> suite is carried out sequentially (they are not yet using the parallel
> test harness of the autotools). So one could only imagine that the build
> itself was faulty, but should then the test not fail consistently afterwards?
> If I understood correctly, you used one build and ran the same test
> over and over again. On the other hand, since the machine also serves as a
> build machine, it is possible that some other package was built at the same
> time as the tests were carried out, which may have contributed to heating.
Yes.
I think the only way to test the hypothesis is to turn off 2 processors
and run that test in a loop again, and/or to do that on a different
ARMv7 platform altogether.
Ludo’.
^ permalink raw reply [flat|nested] 16+ messages in thread
* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-09 8:27 ` Ludovic Courtès
@ 2015-11-20 14:53 ` Ludovic Courtès
2016-06-02 19:43 ` Ludovic Courtès
0 siblings, 1 reply; 16+ messages in thread
From: Ludovic Courtès @ 2015-11-20 14:53 UTC (permalink / raw)
To: Andreas Enge; +Cc: 21620
ludo@gnu.org (Ludovic Courtès) skribis:
> Andreas Enge <andreas@enge.fr> skribis:
>
>> On Wed, Oct 07, 2015 at 10:32:43PM +0200, Ludovic Courtès wrote:
>>> Do you think it’s a likely problem? Andreas, could you try again on
>>> your Novena with 2 cores turned off?
>>
>> I have trouble believing the explanation of overheating. The gmp test
>> suite is carried out sequentially (they are not yet using the parallel
>> test harness of the autotools). So one could only imagine that the build
>> itself was faulty, but should then the test not fail consistently afterwards?
>> If I understood correctly, you used one build and ran the same test
>> over and over again. On the other hand, since the machine also serves as a
>> build machine, it is possible that some other package was built at the same
>> time as the tests were carried out, which may have contributed to heating.
>
> Yes.
>
> I think the only way to test the hypothesis is to turn off 2 processors
> and run that test in a loop again, and/or to do that on a different
> ARMv7 platform altogether.
Did you have a chance to do that? What can we conclude?
TIA! :-)
Ludo’.
^ permalink raw reply [flat|nested] 16+ messages in thread
* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-11-20 14:53 ` Ludovic Courtès
@ 2016-06-02 19:43 ` Ludovic Courtès
0 siblings, 0 replies; 16+ messages in thread
From: Ludovic Courtès @ 2016-06-02 19:43 UTC (permalink / raw)
To: Andreas Enge; +Cc: 21620-done
ludo@gnu.org (Ludovic Courtès) skribis:
> ludo@gnu.org (Ludovic Courtès) skribis:
>
>> Andreas Enge <andreas@enge.fr> skribis:
>>
>>> On Wed, Oct 07, 2015 at 10:32:43PM +0200, Ludovic Courtès wrote:
>>>> Do you think it’s a likely problem? Andreas, could you try again on
>>>> your Novena with 2 cores turned off?
>>>
>>> I have trouble believing the explanation of overheating. The gmp test
>>> suite is carried out sequentially (they are not yet using the parallel
>>> test harness of the autotools). So one could only imagine that the build
>>> itself was faulty, but should then the test not fail consistently afterwards?
>>> If I understood correctly, you used one build and ran the same test
>>> over and over again. On the other hand, since the machine also serves as a
>>> build machine, it is possible that some other package was built at the same
>>> time as the tests were carried out, which may have contributed to heating.
>>
>> Yes.
>>
>> I think the only way to test the hypothesis is to turn off 2 processors
>> and run that test in a loop again, and/or to do that on a different
>> ARMv7 platform altogether.
>
> Did you have a chance to do that? What can we conclude?
I don’t think we’ve had this problem again, which suggests that the
overheating hypothesis was right.
Closing!
Ludo’.
^ permalink raw reply [flat|nested] 16+ messages in thread
* bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu
2015-10-06 16:20 ` Ludovic Courtès
2015-10-07 2:09 ` Mark H Weaver
@ 2015-10-07 14:28 ` Torbjörn Granlund
1 sibling, 0 replies; 16+ messages in thread
From: Torbjörn Granlund @ 2015-10-07 14:28 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: 21620, gmp-bugs
ludo@gnu.org (Ludovic Courtès) writes:
OK, I’ll see if I can reproduce it on another ARMv7 machine and
report back.
Good. Incidentally, we run nightly builds on a bunch of ARMv7 machines.
However, the machine in question is a build machine and it would be
surprising for the RAM issue to manifest only for this program.
That does not surprise me; GMP is a pretty good alternative to MemCheck.
:-)
--
Torbjörn
Please encrypt, key id 0xC8601622
^ permalink raw reply [flat|nested] 16+ messages in thread
end of thread, other threads:[~2016-06-02 19:44 UTC | newest]
Thread overview: 16+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2015-10-05 14:33 bug#21620: GMP 6.0.0a intermittent test failure on armhf Ludovic Courtès
2015-10-05 15:44 ` bug#21620: tests/mpz/reuse intermittently fails on armhf-linux-gnu Ludovic Courtès
2015-10-06 12:48 ` Torbjörn Granlund
2015-10-06 16:20 ` Ludovic Courtès
2015-10-07 2:09 ` Mark H Weaver
2015-10-07 7:24 ` Ludovic Courtès
2015-10-07 12:45 ` Mark H Weaver
2015-10-07 13:08 ` Andreas Enge
2015-10-07 13:39 ` Mark H Weaver
2015-10-07 20:32 ` Ludovic Courtès
2015-10-08 19:07 ` Andreas Enge
2015-10-09 0:53 ` Mark H Weaver
2015-10-09 8:27 ` Ludovic Courtès
2015-11-20 14:53 ` Ludovic Courtès
2016-06-02 19:43 ` Ludovic Courtès
2015-10-07 14:28 ` Torbjörn Granlund
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