* sched_yield
@ 2001-02-25 18:32 Fabrice Peix
2001-02-25 18:52 ` sched_yield Davide Libenzi
0 siblings, 1 reply; 2+ messages in thread
From: Fabrice Peix @ 2001-02-25 18:32 UTC (permalink / raw)
To: KML
Yop,
Just a newbie question ...
Why sys_sched_yield don't call schedule ?
man page of sched_yield tell :
"A process can relinquish the processor voluntarily
without blocking by calling sched_yield.
The process will then be moved to the end
of the queue for its static priority and
a new process gets to run."
Bye.
^ permalink raw reply [flat|nested] 2+ messages in thread
* RE: sched_yield
2001-02-25 18:32 sched_yield Fabrice Peix
@ 2001-02-25 18:52 ` Davide Libenzi
0 siblings, 0 replies; 2+ messages in thread
From: Davide Libenzi @ 2001-02-25 18:52 UTC (permalink / raw)
To: Fabrice Peix; +Cc: KML
On 25-Feb-2001 Fabrice Peix wrote:
>
>
>
> Yop,
>
> Just a newbie question ...
> Why sys_sched_yield don't call schedule ?
>
>
> man page of sched_yield tell :
>
> "A process can relinquish the processor voluntarily
> without blocking by calling sched_yield.
> The process will then be moved to the end
> of the queue for its static priority and
> a new process gets to run."
>
It sets, under certain conditions ( nr_running ), the variable need_resched
and, in the system call return code this value is checked and schedule() is
called.
Look at sched.c and entry.S.
- Davide
^ permalink raw reply [flat|nested] 2+ messages in thread
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