From: Ingo Molnar <mingo@elte.hu>
To: Mitchell Erblich <erblichs@earthlink.net>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Question: RT schedular : task_tick_rt(struct rq *rq, structtask_struct *p) : decreases overhead when rq->nr_running == 1
Date: Thu, 9 Aug 2007 08:59:16 +0200 [thread overview]
Message-ID: <20070809065916.GB30046@elte.hu> (raw)
In-Reply-To: <000501c7da16$838dea40$6501a8c0@earthlink.net>
* Mitchell Erblich <erblichs@earthlink.net> wrote:
> First, RT/RR tasks are not deprecated. [...]
I'm confused, do you say this in reference to anything i said? I did not
say that RR tasks are deprecated and you were top-posting so i cannot
connect it to anything specific. I only said RR tasks are _rare_:
>> this is a pretty rare codepath because the overwhelming majority of
>> RT apps uses SCHED_FIFO [...]
and i hope you can see the difference between 'rare' and 'deprecated'
;-) And i suspect you also missed the last bit of what i wrote:
>> So this is on several levels an uncommon workload and by adding a
>> check like that we'd increase the codesize. But ... no strong
>> feelings against this optimization - if you send a proper patch we
>> can apply it, it certainly makes sense from a logic POV.
and you also missed the first bit it appears:
>> your change is a possible optimization, [...]
so you are banging, with full force, on completely open doors =B-)
Ingo
prev parent reply other threads:[~2007-08-09 6:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-08 23:47 Mitchell Erblich
2007-08-09 6:59 ` Ingo Molnar [this message]
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