From: "Dmitry V. Levin" <ldv@altlinux.org>
To: ALT Devel discussion list <devel@lists.altlinux.org>
Subject: Re: [devel] [partially solved] Q: exit_group slowness
Date: Tue, 5 Jun 2012 13:08:28 +0400
Message-ID: <20120605090827.GB16122@altlinux.org> (raw)
In-Reply-To: <20120605060622.GA11312@shutemov.name>
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On Tue, Jun 05, 2012 at 09:06:22AM +0300, Kirill A. Shutemov wrote:
> Похоже вот на это:
>
> http://lkml.org/lkml/2012/6/3/34
>
> Ниже по трэду Пол предлагает возможное решение.
Спасибо, откат на 3.2.14-std-def-alt1 радикально улучшил картинку:
# env -i strace -r -eprocess /usr/bin/unshare -i /bin/true
0.000000 execve("/usr/bin/unshare", ["/usr/bin/unshare", "-i", "/bin/true"], [/* 0 vars */]) = 0
0.001357 arch_prctl(ARCH_SET_FS, 0x7f49add73700) = 0
0.000457 unshare(CLONE_NEWIPC) = 0
0.000200 execve("/bin/true", ["/bin/true"], [/* 0 vars */]) = 0
0.000350 exit_group(0) = ?
0.156461 +++ exited with 0 +++
Хотя до идеала еще далеко:
# env -i strace -r /bin/true
0.000000 execve("/bin/true", ["/bin/true"], [/* 0 vars */]) = 0
0.000628 exit_group(0) = ?
0.000329 +++ exited with 0 +++
Так что просьба в очередном std-def отключить CONFIG_RCU_FAST_NO_HZ.
--
ldv
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next prev parent reply other threads:[~2012-06-05 9:08 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-04 21:11 [devel] " Dmitry V. Levin
2012-06-04 22:30 ` Kirill A. Shutemov
2012-06-05 0:20 ` Dmitry V. Levin
2012-06-05 6:06 ` Kirill A. Shutemov
2012-06-05 9:08 ` Dmitry V. Levin [this message]
2012-06-05 12:37 ` [devel] [partially solved] " Kirill A. Shutemov
2012-06-05 12:46 ` Dmitry V. Levin
2012-06-05 13:10 ` Kirill A. Shutemov
2012-06-06 1:31 ` Dmitry V. Levin
2012-06-06 18:40 ` Kirill A. Shutemov
2012-06-08 12:46 ` Kirill A. Shutemov
2012-06-08 15:31 ` Kirill A. Shutemov
2012-06-08 15:56 ` Dmitry V. Levin
2012-06-12 7:00 ` Kirill A. Shutemov
2012-06-13 0:32 ` Dmitry V. Levin
2012-08-10 19:41 ` Michael Shigorin
2012-06-04 22:35 ` [devel] " Led
2012-06-04 22:39 ` Kirill A. Shutemov
2012-06-04 22:47 ` Led
2012-06-06 8:43 ` Michael Shigorin
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