From: Con Kolivas <kernel@kolivas.org>
To: Peter Williams <pwil3058@bigpond.net.au>
Cc: Andrew Morton <akpm@osdl.org>, Ingo Molnar <mingo@elte.hu>,
Nick Piggin <piggin@cyberone.com.au>,
linux kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: Likelihood of rt_tasks
Date: Sat, 10 Jul 2004 10:45:16 +1000 [thread overview]
Message-ID: <40EF3C1C.6080206@kolivas.org> (raw)
In-Reply-To: <40EF3B3D.9080908@bigpond.net.au>
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Peter Williams wrote:
> Con Kolivas wrote:
>> - and hitting it frequently enough will be washed over by the cpu as
>> Ingo said. I dont think the order of magnitude of this change is in
>> the same universe as the problem of scheduling latency that people are
>> complaining of.
>
>
> They are talking very small times.
No I think you'll find some people are getting jitter and occasional
latencies up to 50ms with rt tasks, as evidenced by Ingo's own testing.
The problem is bigger than we'd like. Unlikely() would be pushing at
worst not even microsecond differences.
Con
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next prev parent reply other threads:[~2004-07-10 0:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-09 10:00 Likelihood of rt_tasks Con Kolivas
2004-07-09 10:17 ` Ingo Molnar
2004-07-09 23:53 ` Peter Williams
2004-07-10 0:16 ` Con Kolivas
2004-07-10 0:41 ` Peter Williams
2004-07-10 0:45 ` Con Kolivas [this message]
2004-07-10 11:15 ` Ingo Molnar
2004-07-10 12:05 ` Nick Piggin
2004-07-10 3:57 ` Elladan
2004-07-10 11:19 ` Ingo Molnar
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