* /proc/pid/sched units
@ 2021-07-28 12:56 Shivank Garg
2021-07-28 13:13 ` Matthew Wilcox
0 siblings, 1 reply; 2+ messages in thread
From: Shivank Garg @ 2021-07-28 12:56 UTC (permalink / raw)
To: Linux Kernel Mailing List, Linux MM, util-linux
Hi Everyone,
I'm analyzing the cpu time taken ("se.sum_exec_runtime" in
/proc/$pid/sched) by process in different configurations for my
project work. But I was not able to get the time units for the values
displayed in the file. I tried searching it in source code -
kernel/sched/cputime.c,include/linux/sched.h etc. but it left me more
confused.
Can you please answer me about the measurement units (is it
microseconds, nanoseconds, jiffles ...) ?
Also, I was not able to find proper documentation for /proc/pid/sched.
Please point to me if it's already there. If not, I would love to
contribute toward documenting these variables. It would be very
helpful for newbies (like me) in future.
Thanks,
Best Regards,
Shivank Garg
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: /proc/pid/sched units
2021-07-28 12:56 /proc/pid/sched units Shivank Garg
@ 2021-07-28 13:13 ` Matthew Wilcox
0 siblings, 0 replies; 2+ messages in thread
From: Matthew Wilcox @ 2021-07-28 13:13 UTC (permalink / raw)
To: Shivank Garg; +Cc: Linux Kernel Mailing List, Linux MM, util-linux
On Wed, Jul 28, 2021 at 06:26:44PM +0530, Shivank Garg wrote:
> Hi Everyone,
>
> I'm analyzing the cpu time taken ("se.sum_exec_runtime" in
> /proc/$pid/sched) by process in different configurations for my
> project work. But I was not able to get the time units for the values
> displayed in the file. I tried searching it in source code -
> kernel/sched/cputime.c,include/linux/sched.h etc. but it left me more
> confused.
include/linux/sched/types.h: * @sum_exec_runtime: total time spent on the CPU, in nanoseconds
why did that leave you more confused?
^ permalink raw reply [flat|nested] 2+ messages in thread
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