On Sat, Apr 09, 2022 at 01:43:44AM +0000, cgel.zte@xxxxxxxxx wrote:
> From: Yang Yang <yang.yang29@xxxxxxxxxx>
>
> Delay accounting does not track the delay of write-protect copy. When
> tasks trigger many write-protect copys(include COW and unsharing of
> anonymous pages[1]), it may spend a amount of time waiting for them.
> To get the delay of tasks in write-protect copy, could help users to
> evaluate the impact of using KSM or fork() or GUP.
>
> Also update tools/accounting/getdelays.c:
>
> / # ./getdelays -dl -p 231
> print delayacct stats ON
> listen forever
> PID 231
>
> CPU count real total virtual total delay total delay average
> 6247 1859000000 2154070021 1674255063 0.268ms
> IO count delay total delay average
> 0 0 0ms
> SWAP count delay total delay average
> 0 0 0ms
> RECLAIM count delay total delay average
> 0 0 0ms
> THRASHING count delay total delay average
> 0 0 0ms
> COMPACT count delay total delay average
> 3 72758 0ms
> WPCOPY count delay total delay average
> 3635 271567604 0ms
>
> [1] commit 31cc5bc4af70("mm: support GUP-triggered unsharing of anonymous pages")
>
> Signed-off-by: Yang Yang <yang.yang29@xxxxxxxxxx>
> Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
> Reviewed-by: Jiang Xuexin <jiang.xuexin@xxxxxxxxxx>
> Reviewed-by: Ran Xiaokai <ran.xiaokai@xxxxxxxxxx>
> Reviewed-by: wangyong <wang.yong12@xxxxxxxxxx>
As per always; I refuse to take patches from cgel.zte@xxxxxxxxx. Because
yet again From and Sender don't match.
If you want me to consider your email, please send from the email
address you've listed in your SoB.
