From: "Muthal Sangam" <sangam@mail.ru>
To: linux-kernel@vger.kernel.org
Subject: interrupt latency/700microsecs
Date: Mon, 27 May 2002 20:30:06 +0400 [thread overview]
Message-ID: <E17CNNm-000GQe-00@f11.mail.ru> (raw)
On kernel 2.4.7, AMDK6 @ 450MHz processor, is it possible to get latency
fluctuations of upto 700microsecs for running the timer interrupt, due to
interrupts being disabled ?
I am using the time stamp counter and reading it at the start of the timer
interrupt and measuring the cycles elapsed between two inovocations of it.
The number of cycles elapsed is ~4500225, but sometimes it increases to as
high as 4848032. Can i conclude that this difference is due to interrupts
being disabled in critical sections ? ( I think i am making some mistake :-)
- sangam
next reply other threads:[~2002-05-27 16:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-27 16:30 Muthal Sangam [this message]
2002-05-27 16:43 ` interrupt latency/700microsecs William Lee Irwin III
2002-05-27 18:53 ` Alan Cox
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