* User space context switch
@ 2011-03-18 20:07 mohit verma
2011-03-18 22:43 ` Mulyadi Santosa
2011-03-21 7:02 ` Vimal
0 siblings, 2 replies; 4+ messages in thread
From: mohit verma @ 2011-03-18 20:07 UTC (permalink / raw)
To: kernelnewbies
hi all,
is it possible to write a user space code to calculate the context switch
time of a process ? I mean , how can the user space code know about the
working of the scheduler?
Is there any system call API to interact with scheduler or something other
to interact with , regarding this problem?
--
........................
*MOHIT VERMA*
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* User space context switch
2011-03-18 20:07 User space context switch mohit verma
@ 2011-03-18 22:43 ` Mulyadi Santosa
2011-03-21 7:02 ` Vimal
1 sibling, 0 replies; 4+ messages in thread
From: Mulyadi Santosa @ 2011-03-18 22:43 UTC (permalink / raw)
To: kernelnewbies
On Sat, Mar 19, 2011 at 03:07, mohit verma <mohit89mlnc@gmail.com> wrote:
> hi all,
> ??is it possible to write a user space code to calculate the context switch
> time of a process ? I mean , how can the user space code know about the
> working of the scheduler?
check lmbench...
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
^ permalink raw reply [flat|nested] 4+ messages in thread
* User space context switch
2011-03-18 20:07 User space context switch mohit verma
2011-03-18 22:43 ` Mulyadi Santosa
@ 2011-03-21 7:02 ` Vimal
2011-03-21 7:10 ` mohit verma
1 sibling, 1 reply; 4+ messages in thread
From: Vimal @ 2011-03-21 7:02 UTC (permalink / raw)
To: kernelnewbies
Hi Mohit,
On 18 March 2011 13:07, mohit verma <mohit89mlnc@gmail.com> wrote:
> hi all,
> ??is it possible to write a user space code to calculate the context switch
> time of a process ? I mean , how can the user space code know about the
> working of the scheduler?
> Is there any system call API to interact with scheduler or something other
> to interact with , regarding ?this problem?
Do check the function tracing framework in the Linux Kernel.
Links:
* http://lwn.net/Articles/322666/
* http://lwn.net/Articles/290277/
sched_switch is the tracer you're looking for.
--
Vimal
^ permalink raw reply [flat|nested] 4+ messages in thread
* User space context switch
2011-03-21 7:02 ` Vimal
@ 2011-03-21 7:10 ` mohit verma
0 siblings, 0 replies; 4+ messages in thread
From: mohit verma @ 2011-03-21 7:10 UTC (permalink / raw)
To: kernelnewbies
thanks vimal and mulyadi.
On Mon, Mar 21, 2011 at 12:32 PM, Vimal <j.vimal@gmail.com> wrote:
> Hi Mohit,
>
> On 18 March 2011 13:07, mohit verma <mohit89mlnc@gmail.com> wrote:
> > hi all,
> > is it possible to write a user space code to calculate the context
> switch
> > time of a process ? I mean , how can the user space code know about the
> > working of the scheduler?
> > Is there any system call API to interact with scheduler or something
> other
> > to interact with , regarding this problem?
>
> Do check the function tracing framework in the Linux Kernel.
>
> Links:
> * http://lwn.net/Articles/322666/
> * http://lwn.net/Articles/290277/
>
> sched_switch is the tracer you're looking for.
>
> --
> Vimal
>
--
........................
*MOHIT VERMA*
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