linux-kernel - Re: Few interrupts with NO

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Message-ID: <Pine.LNX.4.64.0708061626010.13469@fbirervta.pbzchgretzou.qr>
Date:	Mon, 6 Aug 2007 16:28:42 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Chris Snook <csnook@...hat.com>
cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Few interrupts with NO_HZ


On Aug 6 2007 09:47, Chris Snook wrote:
>> 
>> this more of an informational question. So:
>> kernel version is 2.6.22.1 on i686
>> /proc/uptime 9917.81 9140.90 (2h45m)
>> /proc/cpuinfo:
>>            CPU0
>>   0:        282   IO-APIC-edge      timer
>> 
>> this is kinda neat, I expected much more interrupts than just 282
>> since boot. What kernel code actually uses the irq0 timer?
>
> If you don't have an HPET (and most single-processor systems do not)

This is an AMD Athlon with 'Thoroughbred' core; it does not seem to
have C-states at all (or: exactly one). It clearly is not idle all the
time, sometimes I run povray. (And 282 has not changed since the
morning.)


	Jan
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