From: Srivatsa Vaddagiri <vatsa@in.ibm.com>
To: William Lee Irwin III <wli@holomorphy.com>
Cc: Ingo Molnar <mingo@elte.hu>,
efault@gmx.de, tingy@cs.umass.edu, linux-kernel@vger.kernel.org
Subject: Re: fair clock use in CFS
Date: Mon, 14 May 2007 16:52:59 +0530 [thread overview]
Message-ID: <20070514112259.GC28348@in.ibm.com> (raw)
In-Reply-To: <20070514110500.GV19966@holomorphy.com>
On Mon, May 14, 2007 at 04:05:00AM -0700, William Lee Irwin III wrote:
> The variability in ->fair_clock advancement rate was the mistake, at
> least according to my way of thinking. The queue's virtual time clock
> effectively stops under sufficiently high load, possibly literally in
> the event of fixpoint underflow.
[snip]
> Basically it needs to move closer to EEVDF in these respects.
Doesn't EEVDF have the same issue? From the paper:
V(t) = 1/(w1 + w2 + ...wn)
--
Regards,
vatsa
next prev parent reply other threads:[~2007-05-14 11:15 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-14 8:33 fair clock use in CFS Srivatsa Vaddagiri
2007-05-14 10:29 ` William Lee Irwin III
2007-05-14 10:31 ` Ingo Molnar
2007-05-14 11:05 ` William Lee Irwin III
2007-05-14 11:22 ` Srivatsa Vaddagiri [this message]
2007-05-14 11:20 ` William Lee Irwin III
2007-05-14 12:04 ` Ingo Molnar
2007-05-14 23:57 ` William Lee Irwin III
2007-05-14 20:20 ` Ting Yang
2007-05-14 11:50 ` Ingo Molnar
2007-05-14 14:31 ` Daniel Hazelton
2007-05-14 15:02 ` Srivatsa Vaddagiri
2007-05-14 15:08 ` Ingo Molnar
2007-05-15 2:59 ` David Schwartz
2007-05-14 21:24 ` Ting Yang
2007-05-15 0:57 ` Ting Yang
2007-05-14 23:23 ` William Lee Irwin III
2007-05-14 11:10 ` Ingo Molnar
2007-05-14 13:04 ` Srivatsa Vaddagiri
2007-05-14 13:15 ` Ingo Molnar
-- strict thread matches above, loose matches on Subject: below --
2007-05-14 15:02 Al Boldi
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