Re: [PATCH v5 3/3] sched/cputime: Add steal time support to full dynticks CPU time accounting
From: Ingo Molnar
Date: Wed Jun 08 2016 - 03:23:27 EST
* Wanpeng Li <kernellwp@xxxxxxxxx> wrote:
> From: Wanpeng Li <wanpeng.li@xxxxxxxxxxx>
>
> This patch adds guest steal-time support to full dynticks CPU
> time accounting. After the following commit:
>
> ff9a9b4c4334 ("sched, time: Switch VIRT_CPU_ACCOUNTING_GEN to jiffy granularity")
>
> ... time sampling became jiffy based, even if it's still listened
> to ring boundaries, so steal_account_process_tick() is reused
> to account how many 'ticks' are stolen-time, after the last accumulation.
So the 'ring boundary' part still doesn't parse (neither grammatically nor
logically) - please rephrase it because I have no idea what you want to say here.
Did you want to say:
> ... time sampling became jiffy based, even if it's still being context tracked,
> so steal_account_process_tick() is reused to account how many 'ticks' are
> stolen-time, after the last accumulation.
... which makes sense grammatically but does not make sense to me logically. :-/
Rik, Frederic, could you please help out?
Thanks,
Ingo