From: mulyadi.santosa@gmail.com (Mulyadi Santosa)
To: kernelnewbies@lists.kernelnewbies.org
Subject: system timer interrupt targets for SMP platforms with local timer support
Date: Wed, 18 May 2011 05:28:24 +0700 [thread overview]
Message-ID: <BANLkTikPNbwNTooG8adNGoC231NkS4_8LQ@mail.gmail.com> (raw)
In-Reply-To: <900043e98cd6a6677ecdf54f42ea9923@basementcode.com>
Hi Chris....
On Wed, May 18, 2011 at 03:11, Christopher Harvey
<chris@basementcode.com> wrote:
> ?I'm having a hard time finding out by reading documentation and source
> ?code if a system timer IRQ is supposed to be directed at all cores of a
> ?processor or if just interrupting one core is enough.
my take is if we don't use local timer interrupt, then logically
(global timer) should interrupt all cores.
I came to this understanding after recalling a fact that timer is a
way to trigger rescheduling after a time slice of a task is expired.
SInce we can't assume anything on which core a task is currently
running, then it would be easier if we just send interrupt to all
cores.
Not sure if you are agree with my deduction above....
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
next prev parent reply other threads:[~2011-05-17 22:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-17 20:11 system timer interrupt targets for SMP platforms with local timer support Christopher Harvey
2011-05-17 22:28 ` Mulyadi Santosa [this message]
2011-05-17 23:56 ` Christopher Harvey
2011-05-18 20:08 ` Mulyadi Santosa
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