From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#26441: =?UTF-8?Q?Gnulib=E2=80=99s_?=
	=?UTF-8?Q?=E2=80=98test-lock=E2=80=99?= fails to complete on
	machines with >= 32 cores
Date: Wed, 12 Apr 2017 13:53:57 +0200
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References: <871sszuznt.fsf@gnu.org>
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ludo@gnu.org (Ludovic Court=C3=A8s) skribis:

> This may be fixed by Gnulib commit
> 480d374e596a0ee3fed168ab42cd84c313ad3c89 (not present in
> gettext-0.19.8.1), which introduces this:
>
>   --- a/tests/test-lock.c
>   +++ b/tests/test-lock.c
>   @@ -50,6 +50,13 @@
>       Uncomment this to see if the operating system has a fair scheduler.=
  */
>    #define EXPLICIT_YIELD 1
>
>   +/* Whether to use 'volatile' on some variables that communicate inform=
ation
>   +   between threads.  If set to 0, a lock is used to protect these vari=
ables.
>   +   If set to 1, 'volatile' is used; this is theoretically equivalent b=
ut can
>   +   lead to much slower execution (e.g. 30x slower total run time on a =
40-core
>   +   machine.  */
>   +#define USE_VOLATILE 0
>
> 30x slower could exceed the default max-silent-timeout, which is 1 hour.

Maybe not: building with --max-silent-time=3D18000 didn=E2=80=99t help=E2=
=80=A6

Ludo=E2=80=99.