From: Andrew Morton <akpm@osdl.org>
To: jbarnes@sgi.com (Jesse Barnes)
Cc: axboe@suse.de, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] backing dev unplugging
Date: Wed, 10 Mar 2004 15:54:19 -0800 [thread overview]
Message-ID: <20040310155419.550c4a6a.akpm@osdl.org> (raw)
In-Reply-To: <20040310213509.GA10888@sgi.com>
jbarnes@sgi.com (Jesse Barnes) wrote:
>
> -------------------------------------
> w/Jens' patch: ~47149 I/Os per second
Happier.
> [root@revenue sio]# readprofile -m /root/System.map | sort -nr +2 | head -20
> 181993 default_idle 5687.2812
> 624772 snidle 1627.0104
> 209129 cpu_idle 435.6854
> 4755 dio_bio_end_io 12.3828
> 6593 scsi_end_request 12.1195
> 435 ia64_spinlock_contention 6.7969
> 2959 sn_dma_flush 4.4033
Do you know where that spinlock contention is coming from?
(We have a little patch for x86 which places the spinning code inline in the
caller of spin_lock() so it appears nicely in profiles.)
next prev parent reply other threads:[~2004-03-10 23:52 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 [this message]
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
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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