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Date:      Tue, 17 Apr 2012 12:17:04 -0700
From:      Adrian Chadd <adrian@freebsd.org>
To:        Richard Kojedzinszky <krichy@tvnetwork.hu>
Cc:        Garrett Cooper <yanegomi@gmail.com>, freebsd-security@freebsd.org, freebsd-performance@freebsd.org, Current FreeBSD <freebsd-current@freebsd.org>, "O. Hartmann" <ohartman@zedat.fu-berlin.de>
Subject:   Re: ufs multilabel performance (fwd)
Message-ID:  <CAJ-VmonLzCPfO7DPW=Wj4FDpbfvw2=C=4skfBD8R=pcVrakq-g@mail.gmail.com>
In-Reply-To: <alpine.DEB.2.02.1204170825450.30571@krichy.tvnetwork.hu>
References:  <alpine.DEB.2.02.1204142134050.8001@krichy.tvnetwork.hu> <4F8AAEF7.3090800@zedat.fu-berlin.de> <alpine.DEB.2.02.1204151555080.12537@krichy.tvnetwork.hu> <4F8B21D2.4080008@zedat.fu-berlin.de> <951B1A8C-A216-420A-BA17-316B8D9C2B0E@gmail.com> <4F8B2CC4.5030601@zedat.fu-berlin.de> <28768C15-C694-4C09-8CD1-3F5412554B55@gmail.com> <alpine.DEB.2.02.1204170825450.30571@krichy.tvnetwork.hu>

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On 16 April 2012 23:31, Richard Kojedzinszky <krichy@tvnetwork.hu> wrote:
>
> So now reactions here, creating files with multilabel is still slow.
>
> I would like to use multilabel access control on my /tmp, for example, my
> web server places it's session files there in a subdirectory. Of course, I
> would like to assign a label for that subdir, but with this slow file
> creation, that is not the way to go. I may then use a different filesystem
> for that. In this case, can I assign a root mac label for a mount point?

Hi,

This is a perfect job for hwpmc / dtrace.

Would you be able to load up either of those and get some CPU usage
statistics whilst you're running your benchmark?

It's either that, or it's (massive) locking contention.


Adrian



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