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SubjectOSDL DBT-2 AS vs. Deadline 2.6.0-test5-mm3
Another profile comparison between the deadline and AS elevator with
2.6.0-test5-mm3. It looks like the deadline elevator is doing slightly
more i/o, overall using slightly less processor time. Otherwise it's
only about a 2% difference in the end result according to the NOTPM
column.

These results are from a 4-way system with 4GB of memory.

METRICS OVER LAST 20 MINUTES:
--------------- -------- ----- ---- -------- -----------------------------------
Kernel Elevator NOTPM CPU% Blocks/s URL
--------------- -------- ----- ---- -------- -----------------------------------
2.6.0-test5-mm3 as 1338 91.3 10000.5 http://khack.osdl.org/stp/280185/
2.6.0-test5-mm3 deadline 1366 91.0 10033.2 http://khack.osdl.org/stp/280187/

FUNCTIONS SORTED BY TICKS:
-- ------------------------- ------- ------------------------- -------
# as 2.6.0-test5-mm3 ticks deadline 2.6.0-test5-mm3 ticks
-- ------------------------- ------- ------------------------- -------
1 default_idle 5782689 default_idle 5718679
2 schedule 57644 schedule 50635
3 scsi_request_fn 30697 do_softirq 25740
4 __make_request 26061 scsi_request_fn 23486
5 do_softirq 26040 __make_request 19235
6 scsi_end_request 13169 try_to_wake_up 11406
7 try_to_wake_up 12028 dio_bio_end_io 10867
8 dio_bio_end_io 10805 scsi_end_request 9113
9 do_anonymous_page 8108 do_anonymous_page 8089
10 ipc_lock 7295 ipc_lock 7598
11 sysenter_past_esp 6664 sys_semtimedop 6107
12 sys_semtimedop 4947 sysenter_past_esp 5220
13 direct_io_worker 4358 direct_io_worker 4412
14 __might_sleep 4185 __might_sleep 4301
15 __copy_to_user_ll 3813 blk_run_queue 3901
16 blk_run_queue 3589 dio_await_one 3676
17 __mod_timer 3580 __copy_to_user_ll 3592
18 kmem_cache_alloc 3480 __mod_timer 3519
19 dio_await_one 3446 kmem_cache_alloc 3466
20 get_request 3123 get_request 3215

--
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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