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From: Cyril Hrubis <chrubis@suse.cz>
To: Li Wang <liwang@redhat.com>
Cc: Scott Weaver <scweaver@redhat.com>, ltp@lists.linux.it
Subject: Re: [LTP] [PATCH] getrusage03: Forcing context switches to update resource usage
Date: Tue, 17 Sep 2024 13:16:36 +0200	[thread overview]
Message-ID: <ZullFLOc6fLJyCts@yuki.lan> (raw)
In-Reply-To: <20240805063616.12572-1-liwang@redhat.com>

Hi!
> Our CI sporadically complains that this test grandchild's MAXRSS did not reach
> the expected 300MB size.
> 
>     12 getrusage03.c:86: TFAIL: child.children = 258048, expected 307200
> 
> As the ru_maxrss value is generally updated at certain intervals or under
> specific conditions, such as page faults or context switches. There may be
> delay between the completion of memset() and the update of ru_maxrss.
> 
> To address this issue, we create a function to force context switches by
> calling sched_yield() multiple times. This approach helps to ensure that
> the system has the opportunity to update the ru_maxrss value more promptly.
> 
> Reproted-by: Scott Weaver <scweaver@redhat.com>
> Signed-off-by: Li Wang <liwang@redhat.com>

This looks forgotten but should probably go in before the release...

Anyways:

Reviewed-by: Cyril Hrubis <chrubis@suse.cz>

-- 
Cyril Hrubis
chrubis@suse.cz

-- 
Mailing list info: https://lists.linux.it/listinfo/ltp

  parent reply	other threads:[~2024-09-17 11:18 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-08-05  6:36 [LTP] [PATCH] getrusage03: Forcing context switches to update resource usage Li Wang
2024-08-05  6:58 ` Li Wang
2024-09-17 11:16 ` Cyril Hrubis [this message]
2024-09-18  3:19   ` Li Wang

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