GNU bug report logs - #45651
28.0.50; emacs native-comp crashes with pidigits bench

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Package: emacs;

Reported by: Michael Schmidt <michael.a.schmidt <at> email.de>

Date: Mon, 4 Jan 2021 11:38:02 UTC

Severity: normal

Found in version 28.0.50

Done: Andrea Corallo <akrl <at> sdf.org>

Bug is archived. No further changes may be made.

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Report forwarded to bug-gnu-emacs <at> gnu.org:
bug#45651; Package emacs. (Mon, 04 Jan 2021 11:38:02 GMT) Full text and rfc822 format available.
Acknowledgement sent to Michael Schmidt <michael.a.schmidt <at> email.de>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs <at> gnu.org. (Mon, 04 Jan 2021 11:38:02 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Michael Schmidt <michael.a.schmidt <at> email.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; emacs native-comp crashes with pidigits bench
Date: Mon, 4 Jan 2021 12:37:10 +0100

[Message part 1 (text/html, inline)]
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#45651; Package emacs. (Mon, 04 Jan 2021 16:24:02 GMT) Full text and rfc822 format available.

Message #8 received at 45651 <at> debbugs.gnu.org (full text, mbox):

From: Andrea Corallo <akrl <at> sdf.org>
To: Michael Schmidt <michael.a.schmidt <at> email.de>
Cc: 45651 <at> debbugs.gnu.org
Subject: Re: bug#45651: 28.0.50; emacs native-comp crashes with pidigits bench
Date: Mon, 04 Jan 2021 16:23:42 +0000

Michael Schmidt <michael.a.schmidt <at> email.de> writes:

> Hi!
>  
> Running the pidigits benchmark crashes emacs with a SIGTERM.
> All other benchmarks from the elip-benchmarks-1.9 suite passed and were
> moved in another dir for this run.
> I tested both with and without libgmp.
>  

Hi Michael,

Interesting, I can't reproduce on my machine.

I suspect may due to excessive memory consumption on your system, is it
possible?  Could you have a run monitoring it?  Maybe also having a look
into 'dmesg' output may give some info about why the process got killed.

  Andrea
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#45651; Package emacs. (Tue, 05 Jan 2021 19:31:01 GMT) Full text and rfc822 format available.

Message #11 received at 45651 <at> debbugs.gnu.org (full text, mbox):

From: Michael Schmidt <michael.a.schmidt <at> email.de>
To: Andrea Corallo <akrl <at> sdf.org>
Cc: 45651 <at> debbugs.gnu.org
Subject: Aw: Re: bug#45651: 28.0.50; emacs native-comp crashes with pidigits
 bench
Date: Tue, 5 Jan 2021 20:30:22 +0100

[Message part 1 (text/html, inline)]
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#45651; Package emacs. (Wed, 06 Jan 2021 20:45:01 GMT) Full text and rfc822 format available.

Message #14 received at 45651 <at> debbugs.gnu.org (full text, mbox):

From: Andrea Corallo <akrl <at> sdf.org>
To: Michael Schmidt <michael.a.schmidt <at> email.de>
Cc: 45651 <at> debbugs.gnu.org
Subject: Re: Aw: Re: bug#45651: 28.0.50; emacs native-comp crashes with
 pidigits bench
Date: Wed, 06 Jan 2021 20:44:51 +0000

Michael Schmidt <michael.a.schmidt <at> email.de> writes:

> Hi Andrea,
>  
> [here an extended version with cc to 45651 <at> debbugs.gnu.org]
>  
> Clean build with
>
>     emacs-8ad983c4acef60a80e8d6b6ba891b1ef957f2d7c.tar.gz  
>  
> Fedorea 33 VirtualBox 24GB+10GB swap: pidigits passed with ~61% peak memory consumption.
> Fedorea 33 VirtualBox 16GB+10GB swap: pidigits passed with ~98% peak memory consumption.
> Fedorea 33 VirtualBox 8GB  +10GB swap: pidigits crashed as described before. Please no "Eight gigabytes of memory and
> constantly swaping" ;-)
> dmesg unchaged after boot, no further info.
>  
> A build without nativecomp passed pidigits with ~1.5% memory consumption.
> Really looks like a memory leak.

Yeah I think this is a bug in the benchmark.  This is compiled at speed
3 and the programmer should be responsible to "garbage-collect-maybe" in
hot loops if this is required.

If this theory is correct you should see the issue disappearing adding
~(declare (speed 2))~ to `elb-pidigits'.

  Andrea
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#45651; Package emacs. (Mon, 15 Mar 2021 20:45:01 GMT) Full text and rfc822 format available.

Message #17 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Andrea Corallo <akrl <at> sdf.org>
To: Andrea Corallo via "Bug reports for GNU Emacs, the Swiss army knife of
 text editors" <bug-gnu-emacs <at> gnu.org>
Cc: 45651-done <at> debbugs.gnu.org, Michael Schmidt <michael.a.schmidt <at> email.de>
Subject: Re: bug#45651: Aw: Re: bug#45651: 28.0.50; emacs native-comp
 crashes with pidigits bench
Date: Mon, 15 Mar 2021 20:44:08 +0000

Hi Michael,

sorry for the late replay, I've fixed with 5a37ce17ea elisp-benchmarks
as discussed and now GC can do its job in `elb-pidigits'.

I'm closing this and works on my system, happy to reopen in case.

Thanks!

  Andrea
Reply sent to Andrea Corallo <akrl <at> sdf.org>:
You have taken responsibility. (Mon, 15 Mar 2021 20:45:02 GMT) Full text and rfc822 format available.
Notification sent to Michael Schmidt <michael.a.schmidt <at> email.de>:
bug acknowledged by developer. (Mon, 15 Mar 2021 20:45:02 GMT) Full text and rfc822 format available.
bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Tue, 13 Apr 2021 11:24:05 GMT) Full text and rfc822 format available.
This bug report was last modified 3 years and 28 days ago.

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