Re: OSDL DBT-2 AS vs. Deadline 2.6.0-test4-mm3

[Jens Axboe]

On Fri, Sep 05 2003, Mike Fedyk wrote:
> On Fri, Sep 05, 2003 at 11:27:56AM -0700, markw@xxxxxxxx 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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/