From: Jens Axboe <axboe@suse.de>
To: mfedyk@matchmail.com
Cc: markw@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: OSDL DBT-2 AS vs. Deadline 2.6.0-test4-mm3
Date: Mon, 8 Sep 2003 09:35:27 +0200 [thread overview]
Message-ID: <20030908073527.GF840@suse.de> (raw)
In-Reply-To: <20030905201722.GC19041@matchmail.com>
On Fri, Sep 05 2003, Mike Fedyk wrote:
> On Fri, Sep 05, 2003 at 11:27:56AM -0700, markw@osdl.org wrote:
> > FUNCTIONS SORTED BY LOAD:
> > -- ------------------------- ------- ------------------------- -------
> > # as 2.6.0-test4-mm3 ticks deadline 2.6.0-test4-mm3 ticks
> > -- ------------------------- ------- ------------------------- -------
> > 1 default_idle 5746007 default_idle 5764451
> > 2 schedule 53609 schedule 52174
> > 3 scsi_request_fn 29340
> > do_softirq 25905
> > 4 __make_request 25949 scsi_request_fn 23549
> > 5 do_softirq 25560 __make_request 20325
> > 6 scsi_end_request 16524 try_to_wake_up 11723
> > 7 try_to_wake_up 11939 scsi_end_request 11340
> > 8 dio_bio_end_io 11253 dio_bio_end_io 10950
> > 9 do_anonymous_page 8234 do_anonymous_page 8110
> > 10 ipc_lock 7366 ipc_lock 6706
> > 11 sys_semtimedop 5493 sys_semtimedop 5152
> > 12 sysenter_past_esp 5080 sysenter_past_esp 5064
> > 13 direct_io_worker 5065 direct_io_worker 4732
> > 14 dio_await_one 4084 dio_await_one 3779
> > 15 __copy_to_user_ll 3643 __mod_timer 3571
> > 16 __mod_timer 3582 blk_run_queue 3521
> > 17 blk_run_queue 3411 __copy_to_user_ll 3495
> > 18 __might_sleep 3316 __might_sleep 3277
> > 19 kmem_cache_alloc 3225 kmem_cache_alloc 3054
> > 20 semctl_main 3072 semctl_main 3016
> >
>
> Looking at this quickly, scsi_request_fn, __make_request, and
> scsi_end_request are show the most additional cost on AS. As well as
> __copy_to_user_ll and ipc_lock.
I think you forgot to include the interesting part of your email.
--
Jens Axboe
prev parent reply other threads:[~2003-09-08 7:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-05 18:27 OSDL DBT-2 AS vs. Deadline 2.6.0-test4-mm3 markw
2003-09-05 20:17 ` Mike Fedyk
2003-09-08 7:35 ` Jens Axboe [this message]
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