On 02/08/2017 02:05 PM, Peter Zijlstra wrote:
> On Wed, Feb 08, 2017 at 01:00:24PM -0500, Waiman Long wrote:
>> It was found when running fio sequential write test with a XFS ramdisk
>> on a 2-socket x86-64 system, the %CPU times as reported by perf were
>> as follows:
>>
>> 71.27% 0.28% fio [k
On Wed, Feb 08, 2017 at 01:00:24PM -0500, Waiman Long wrote:
> It was found when running fio sequential write test with a XFS ramdisk
> on a 2-socket x86-64 system, the %CPU times as reported by perf were
> as follows:
>
> 71.27% 0.28% fio [k] down_write
> 70.99% 0.01% fio [k] call_rwsem_d
It was found when running fio sequential write test with a XFS ramdisk
on a 2-socket x86-64 system, the %CPU times as reported by perf were
as follows:
71.27% 0.28% fio [k] down_write
70.99% 0.01% fio [k] call_rwsem_down_write_failed
69.43% 1.18% fio [k] rwsem_down_write_failed
65.51%
