linux-kernel - Re: CFS-v16: top shows incorrect CPU% for multi-threaded application

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <4354d3270706160017t59e72882jd99a87a16288fe3f@mail.gmail.com>
Date:	Sat, 16 Jun 2007 10:17:09 +0300
From:	"Török Edvin" <edwintorok@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Re: CFS-v16: top shows incorrect CPU% for multi-threaded application

On 6/13/07, Török Edvin <edwintorok@...il.com> wrote:
> Hi,
>
> When I run a multithreaded application, consisting of a "main thread"
> that is mostly idle, and
> 3 "worker threads" (using as much CPU as they can get), 'top' and 'ps'
> show that
> the application uses 0% CPU.
> If I turn off thread details in top, and ps it correctly shows the CPU
> usage of each thread.
>
> This happens only on 2.6.22-rc4-cfs-v16, on 2.6.21-1 everything is ok
> (top shows sum-of-all-threads-CPU-usage, i.e. ~98,99%).

This has been fixed in cfs-v17.

Thanks,
Edwin
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/