Re: Mainline kernel OLTP performance update

Andi Kleen
2009-04-27T07:02:40Z

"Styner, Douglas W" <douglas.w.styner@intel.com> writes:

>
> ======oprofile 0.9.3 CPU_CLK_UNHALTED for top 30 functions
> Cycles% 2.6.24.2 Cycles% 2.6.30-rc2
> 74.8578 <database> 67.6966 <database>

The dip in database cycles is indeed worrying.

> 1.0500 qla24xx_start_scsi 1.1724 qla24xx_start_scsi
> 0.8089 schedule 1.0578 qla24xx_intr_handler
> 0.5864 kmem_cache_alloc 0.8259 __schedule
> 0.4989 __blockdev_direct_IO 0.7451 kmem_cache_alloc
> 0.4357 __sigsetjmp 0.4872 __blockdev_direct_IO
> 0.4152 copy_user_generic_string 0.4390 task_rq_lock
> 0.3953 qla24xx_intr_handler 0.4338 __sigsetjmp

And also why the qla24xx_intr_handler became ~2.5x as expensive.
Cc linux-scsi and qla24xx maintainers.

-Andi

--
ak@linux.intel.com -- Speaking for myself only.