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From: Frederic Weisbecker <fweisbec@gmail.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Jeff Mahoney <jeffm@suse.com>,
	ReiserFS Development List <reiserfs-devel@vger.kernel.org>,
	Chris Mason <chris.mason@oracle.com>,
	Alexander Beregalov <a.beregalov@gmail.com>,
	Alessio Igor Bogani <abogani@texware.it>,
	Jonathan Corbet <corbet@lwn.net>,
	Alexander Viro <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH 0/6] kill-the-BKL/reiserfs3: performance improvements, faster than Bkl based scheme
Date: Sat, 2 May 2009 03:39:07 +0200	[thread overview]
Message-ID: <20090502013906.GA5331@nowhere> (raw)
In-Reply-To: <1241145862-21700-1-git-send-email-fweisbec@gmail.com>

On Fri, May 01, 2009 at 04:44:16AM +0200, Frederic Weisbecker wrote:
> Hi,
> 
> This reiserfs patchset applies against latest tip:core/kill-the-BKL
> It adds various explicit write lock releases on specific sleeping sections.
> 
> A performance test with dbench on UP with 100 processus during 100 seconds
> gives the following results:
> 
> Locking		  Throughput 
> 
> Bkl:              11.2587 MB/s
> Write lock/Mutex: 12.5713 MB/s


I just tested on SMP with two CPU:

Write Lock/Mutex: Throughput 66.9269 MB/sec 100 procs
Bkl:              Throughput 71.9998 MB/sec 100 procs

So:

UP:  11% faster
SMP:  8% slower


I guess there is still some work to do :)


      parent reply	other threads:[~2009-05-02  1:39 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-01  2:44 [PATCH 0/6] kill-the-BKL/reiserfs3: performance improvements, faster than Bkl based scheme Frederic Weisbecker
2009-05-01  2:44 ` [PATCH 1/6] kill-the-BKL/reiserfs: release write lock on fs_changed() Frederic Weisbecker
2009-05-01  6:31   ` Andi Kleen
2009-05-01 13:28     ` Frederic Weisbecker
2009-05-01 13:44       ` Chris Mason
2009-05-01 14:01         ` Frederic Weisbecker
2009-05-01 14:14           ` Chris Mason
2009-05-02  1:19             ` Frederic Weisbecker
2009-05-01  2:44 ` [PATCH 2/6] kill-the-BKL/reiserfs: release the write lock before rescheduling on do_journal_end() Frederic Weisbecker
2009-05-01  7:09   ` Ingo Molnar
2009-05-01 13:31     ` Frederic Weisbecker
2009-05-01 22:20       ` Frederic Weisbecker
2009-05-01  2:44 ` [PATCH 3/6] kill-the-BKL/reiserfs: release write lock while rescheduling on prepare_for_delete_or_cut() Frederic Weisbecker
2009-05-01  2:44 ` [PATCH 4/6] kill-the-BKL/reiserfs: release the write lock inside get_neighbors() Frederic Weisbecker
2009-05-01  5:51   ` Ingo Molnar
2009-05-01 13:25     ` Frederic Weisbecker
2009-05-01 13:29       ` Chris Mason
2009-05-01 13:31         ` Ingo Molnar
2009-05-01  2:44 ` [PATCH 5/6] kill-the-BKL/reiserfs: release the write lock inside reiserfs_read_bitmap_block() Frederic Weisbecker
2009-05-01  5:47   ` Ingo Molnar
2009-05-01 13:19     ` Frederic Weisbecker
2009-05-01 13:30       ` Chris Mason
2009-05-01 13:51         ` Frederic Weisbecker
2009-05-01  2:44 ` [PATCH 6/6] kill-the-BKL/reiserfs: release the write lock on flush_commit_list() Frederic Weisbecker
2009-05-01  5:42   ` Ingo Molnar
2009-05-01 13:13     ` Frederic Weisbecker
2009-05-01 13:23       ` Ingo Molnar
2009-05-01 13:26       ` Chris Mason
2009-05-01 13:29         ` Ingo Molnar
2009-05-01 13:54           ` Chris Mason
2009-05-01  5:35 ` [PATCH 0/6] kill-the-BKL/reiserfs3: performance improvements, faster than Bkl based scheme Ingo Molnar
2009-05-01 12:18   ` Thomas Meyer
2009-05-01 14:12     ` Frederic Weisbecker
2009-05-01 19:59 ` Linus Torvalds
2009-05-01 20:33   ` Ingo Molnar
2009-05-01 20:36     ` Ingo Molnar
2009-05-01 21:11       ` Linus Torvalds
2009-05-01 21:32   ` Ingo Molnar
2009-05-02  1:39 ` Frederic Weisbecker [this message]

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