From: Mike Hommey <mh@glandium.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Benjamin Kramer <benny.kra@googlemail.com>,
Fredrik Kuivinen <frekui@gmail.com>,
Git Mailing List <git@vger.kernel.org>,
Junio C Hamano <gitster@pobox.com>,
Johannes Sixt <j.sixt@viscovery.net>
Subject: Re: [PATCH v4] Threaded grep
Date: Tue, 26 Jan 2010 18:19:00 +0100 [thread overview]
Message-ID: <20100126171900.GA14092@glandium.org> (raw)
In-Reply-To: <alpine.LFD.2.00.1001260846330.3574@localhost.localdomain>
On Tue, Jan 26, 2010 at 08:56:50AM -0800, Linus Torvalds wrote:
<snip>
> although it is worth noting that that machine has an Intel SSD, which is
> why it gets sped up so much by parallel IO (there's no seek penalty, and
> it is able to read multiple channels in parallel, so this gives much
> better IO patterns for it - with rotational media the numbers might be
> very different).
For rotational disks, using FIEMAP to get the position of the files on
disk to reorder how we read them could help.
Mike
next prev parent reply other threads:[~2010-01-26 17:19 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-25 22:51 [PATCH v4] Threaded grep Fredrik Kuivinen
2010-01-25 23:59 ` Linus Torvalds
2010-01-26 12:10 ` Fredrik Kuivinen
2010-01-26 15:28 ` Linus Torvalds
2010-01-26 16:30 ` Benjamin Kramer
2010-01-26 16:44 ` Linus Torvalds
2010-01-26 16:56 ` Linus Torvalds
2010-01-26 17:19 ` Mike Hommey [this message]
2010-01-26 17:48 ` [PATCH] grep: use REG_STARTEND (if available) to speed up regexec Benjamin Kramer
2010-01-26 1:20 ` [PATCH v4] Threaded grep Junio C Hamano
2010-01-26 11:43 ` Fredrik Kuivinen
2010-01-26 17:21 ` Junio C Hamano
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