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SubjectOSDL DBT-2 AS vs. Deadline 2.6.0-test4-mm3
With recent firmware upgrades to our controller cards in our STP system,
I was finally able to make use of Mark Haverkamp's aacraid patch to
avoid bounce buffers. I've broken out the data by host, since we see
varying results between our system:

AS Scheduler:
host avg. notpm stddev samples
-------- ---------- ------ -------
stp4-000 1273.13 66.91 6
stp4-001 1210.33 27.81 6
stp4-002 1217.33 10.03 6
stp4-003 1338.67 12.88 5

Deadline Scheduler:
host avg. notpm stddev samples
-------- ---------- ------ -------
stp4-000 1268.50 61.81 3
stp4-001 1232.67 11.15 3
stp4-002 1214.00 - 1
stp4-003 1348.00 30.04 3


Here's a profile comparison:

METRICS OVER LAST 20 MINUTES:
--------------- -------- ----- ---- -------- -----------------------------------
Kernel Elevator NOTPM CPU% Blocks/s URL
--------------- -------- ----- ---- -------- -----------------------------------
2.6.0-test4-mm3 as 1315 90.8 9983.1 http://khack.osdl.org/stp/278809/
2.6.0-test4-mm3 deadline 1314 90.3 10036.0 http://khack.osdl.org/stp/278903/

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

--
Mark Wong - - markw@osdl.org
Open Source Development Lab Inc - A non-profit corporation
12725 SW Millikan Way - Suite 400 - Beaverton, OR 97005
(503) 626-2455 x 32 (office)
(503) 626-2436 (fax)
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