From: "Manfred Spraul" <manfred@colorfullife.com>
To: <geirt@powertech.no>
Cc: <linux-kernel@vger.kernel.org>
Subject: Re: Serial port latency
Date: Thu, 22 Mar 2001 22:45:58 +0100 [thread overview]
Message-ID: <000401c0b319$c2ba7dd0$5517fea9@local> (raw)
Is the computer otherwise idle?
I've seen one unexplainable report with atm problems that disappeared
(!) if a kernel compile was running.
Could you try to run a simple cpu hog (with nice 20)?
<<
main()
{
for(;;) getpid();
}
<<
I'm aware of one bug that could cause a delay of up to 20 ms (cpu_idle()
doesn't check for pending softirq's before sleeping), but that doesn't
explain your 500 ms delay.
--
Manfred
next reply other threads:[~2001-03-22 21:48 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-22 21:45 Manfred Spraul [this message]
[not found] <000401c0b319517fea9@local>
2001-03-25 23:10 ` Serial port latency Pavel Machek
2001-03-29 7:58 ` Manfred Spraul
2001-03-30 22:36 ` Pavel Machek
2001-03-31 22:09 ` Manfred Spraul
2001-04-10 0:37 ` Andrea Arcangeli
[not found] <Pine.LNX.4.20.0103221219410.3343-100000@linuxtaj.korpivaara.org>
2001-03-22 20:03 ` Geir Thomassen
2001-03-22 20:17 ` Trent Jarvi
-- strict thread matches above, loose matches on Subject: below --
2001-03-22 18:21 Geir Thomassen
2001-03-22 20:08 ` Theodore Tso
2001-03-22 20:32 ` Geir Thomassen
2001-03-22 20:55 ` Paul Fulghum
2001-03-22 22:44 ` Theodore Tso
[not found] ` <20010322141937.C22479@universal-fasteners.com>
2001-03-22 21:02 ` Geir Thomassen
2001-03-22 21:52 ` Jonathan Lundell
2001-03-22 23:25 ` Pavel Machek
2001-03-23 14:43 ` Geir Thomassen
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