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Date:      Mon, 20 Nov 2006 23:45:32 +0100
From:      Pawel Jakub Dawidek <pjd@FreeBSD.org>
To:        Attilio Rao <attilio@freebsd.org>
Cc:        freebsd-current@freebsd.org, Robert Watson <rwatson@freebsd.org>, freebsd-arch@freebsd.org
Subject:   Re: sx locks rewriting - needs testers
Message-ID:  <20061120224532.GA232@garage.freebsd.pl>
In-Reply-To: <3bbf2fe10610181518k68356528i154267c0bd1b1a77@mail.gmail.com>
References:  <3bbf2fe10610181518k68356528i154267c0bd1b1a77@mail.gmail.com>

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On Thu, Oct 19, 2006 at 12:18:16AM +0200, Attilio Rao wrote:
> In my P4 branch: //depot/user/attilio/attilio_smpng/...
> you can find a sx locks rewriting using the optimized semantic of
> rwlocks; in the end this might result in a valuable performance
> improvement.

I'm using sx(9) locks for Solaris mutexes and rwlocks, as I need locks
for ZFS that I can sleep while holding.
=46rom my simple tests your locks are stable and ZFS is 10% faster. Nice
work.

--=20
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd@FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

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