From: "Kenneth Chen" <kenneth.w.chen@intel.com>
To: "'Andrew Morton'" <akpm@osdl.org>, "Jens Axboe" <axboe@suse.de>
Cc: <linux-kernel@vger.kernel.org>, <thornber@redhat.com>
Subject: RE: [PATCH] backing dev unplugging
Date: Sun, 14 Mar 2004 21:53:58 -0800 [thread overview]
Message-ID: <200403150553.i2F5rum14058@unix-os.sc.intel.com> (raw)
In-Reply-To: <20040310115545.16cb387f.akpm@osdl.org>
>>>>>> Andrew Morton on Wed March 10, 2004 11:56 AM
>Jens Axboe <axboe@suse.de> wrote:
>> Here's a first cut at killing global plugging of block devices to reduce
>> the nasty contention blk_plug_lock caused. This introduceds per-queue
>> plugging, controlled by the backing_dev_info.
>
>This is such an improvement over what we have now it isn't funny.
>
>Ken, the next -mm is starting to look like linux-3.1.0 so I think it
>would be best if you could benchmark Jens's patch against 2.6.4-rc2-mm1.
Our latest measurement on the 32P, 1000 disks setup indicates this patch
is working as expected performance wise. We saw 200% improvement on the
throughput compare to global blk_plug_list. (compare to the per-cpu
blk_plug_list, performance is the same).
- Ken
next prev parent reply other threads:[~2004-03-15 5:54 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-10 12:45 Jens Axboe
2004-03-10 19:55 ` Andrew Morton
2004-03-10 20:03 ` Kenneth Chen
2004-03-10 20:20 ` Jens Axboe
2004-03-10 20:45 ` Jesse Barnes
2004-03-10 20:49 ` Jens Axboe
[not found] ` <20040310205237.GK15087@suse.de>
2004-03-10 21:01 ` Jesse Barnes
2004-03-10 21:02 ` Jens Axboe
2004-03-10 21:35 ` Jesse Barnes
2004-03-10 23:54 ` Andrew Morton
2004-03-11 0:03 ` David Mosberger
2004-03-11 6:30 ` Jesse Barnes
2004-03-10 20:17 ` Jens Axboe
2004-03-15 5:53 ` Kenneth Chen [this message]
2004-03-10 20:14 ` Jeff Garzik
2004-03-10 20:19 ` Jens Axboe
2004-03-10 21:00 ` Andrew Morton
2004-03-10 21:02 ` Jens Axboe
2004-03-10 21:40 ` Miquel van Smoorenburg
2004-03-10 23:05 ` Andrew Morton
2004-03-11 0:05 ` Miquel van Smoorenburg
2004-03-11 0:17 ` Andrew Morton
2004-03-11 6:43 ` Jens Axboe
2004-03-10 22:22 ` Nathan Scott
2004-03-10 23:32 ` Steve Lord
2004-03-11 7:05 ` Jens Axboe
2004-03-11 9:14 ` Joe Thornber
2004-03-11 9:16 ` Jens Axboe
2004-03-11 12:17 ` Christophe Saout
2004-03-11 12:22 ` Jens Axboe
2004-03-11 13:11 ` Christophe Saout
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