From: "Roman V. Shaposhnik" <rvs@sun.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] Calling vac from C
Date: Tue, 24 Feb 2009 08:15:04 -0800 [thread overview]
Message-ID: <1235492105.28500.524.camel@goose.sun.com> (raw)
In-Reply-To: <dff955d24d071515581495be905b665d@quanstro.net>
On Tue, 2009-02-24 at 10:54 -0500, erik quanstrom wrote:
> > about 5 years ago i took a class on performance tuning Solaris.
> >
> > The instructor claimed that fork was expensive because accounting is never really turned off, just piped to /dev/null. there is no accounting overhead for threads.
> >
> > I never bothered to verify this, but now that this comes up, I'd tempted.
>
> there's no need to guess. here's the source code.
>
> http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/os/fork.c
>
> cfork is ~525 lines long and seems to take the curious tack of
> forking all the lwps associated with a process.
that would be forkall(), not fork1()/fork()
Thanks,
Roman.
next prev parent reply other threads:[~2009-02-24 16:15 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-24 15:54 erik quanstrom
2009-02-24 16:15 ` Roman V. Shaposhnik [this message]
[not found] <c9aea65e7f058933edc0a22e931ea675@quanstro.net>
2009-02-24 17:17 ` Roman V. Shaposhnik
-- strict thread matches above, loose matches on Subject: below --
2009-02-24 17:01 erik quanstrom
[not found] <ac072e66c823fd6d649593efec9e221b@quanstro.net>
2009-02-24 16:32 ` Roman V. Shaposhnik
2009-02-24 16:22 erik quanstrom
2009-02-19 9:53 anooop.anooop
2009-02-19 12:55 ` erik quanstrom
2009-02-20 9:53 ` anooop.anooop
2009-02-20 15:41 ` erik quanstrom
2009-02-20 16:17 ` Uriel
2009-02-20 16:47 ` erik quanstrom
2009-02-24 6:10 ` Ben Calvert
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