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From: Philippe Troin <phil@fifi.org>
To: john stultz <johnstul@us.ibm.com>
Cc: linux-kernel@vger.kernel.org, macro@linux-mips.org
Subject: Re: 2.6.25.9: system clocks works normally then speeds up 4x...
Date: 11 Jul 2008 12:53:49 -0700	[thread overview]
Message-ID: <87bq14nqnm.fsf@old-tantale.fifi.org> (raw)
In-Reply-To: <87mykqzn85.fsf@old-tantale.fifi.org>

Philippe Troin <phil@fifi.org> writes:

> I've rebooted without noapic, and I will monitor and log these numbers
> and see how it goes.

So I've been monitoring local timer interrupts since the last reboot.
Last reboot was on July 9 at 3:14 PM.

I've been logging grep LOC /proc/interrupts every 10 seconds.

Initially, both CPUs log about 1000 LOC interrupts per second.
All of a sudden, CPU1 starts receving only 20 per second while CPU0
keeps getting its normal allotment of 1000 per second.

This is the time where it happens:

Thu Jul 10 12:13:59 PDT 2008: LOC:   75616236   75616322   Local timer interrupts
Thu Jul 10 12:14:09 PDT 2008: LOC:   75626255   75626341   Local timer interrupts
Thu Jul 10 12:14:19 PDT 2008: LOC:   75636275   75636360   Local timer interrupts
Thu Jul 10 12:14:29 PDT 2008: LOC:   75646293   75646379   Local timer interrupts
Thu Jul 10 12:14:39 PDT 2008: LOC:   75656312   75650462   Local timer interrupts
Thu Jul 10 12:14:49 PDT 2008: LOC:   75666355   75650857   Local timer interrupts
Thu Jul 10 12:14:59 PDT 2008: LOC:   75676378   75651251   Local timer interrupts
Thu Jul 10 12:15:09 PDT 2008: LOC:   75686403   75651645   Local timer interrupts
Thu Jul 10 12:15:19 PDT 2008: LOC:   75696420   75652039   Local timer interrupts
Thu Jul 10 12:15:29 PDT 2008: LOC:   75706439   75652433   Local timer interrupts
Thu Jul 10 12:15:39 PDT 2008: LOC:   75716476   75652827   Local timer interrupts
Thu Jul 10 12:15:49 PDT 2008: LOC:   75726495   75653221   Local timer interrupts
Thu Jul 10 12:15:59 PDT 2008: LOC:   75736514   75653615   Local timer interrupts
Thu Jul 10 12:16:09 PDT 2008: LOC:   75746548   75654009   Local timer interrupts
Thu Jul 10 12:16:19 PDT 2008: LOC:   75756573   75654403   Local timer interrupts

Phil.

      reply	other threads:[~2008-07-11 19:58 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-07-09 19:21 Philippe Troin
2008-07-09 19:55 ` john stultz
2008-07-09 20:01   ` Philippe Troin
2008-07-09 20:08     ` john stultz
2008-07-09 20:53       ` Philippe Troin
2008-07-09 21:21         ` john stultz
2008-07-09 22:50           ` Philippe Troin
2008-07-11 19:53             ` Philippe Troin [this message]

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