linux-kernel - Re: nmi_watchdog=2 regression in 2.6.21

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Message-Id: <200709011112.24320.ak@suse.de>
Date:	Sat, 1 Sep 2007 11:12:24 +0200
From:	Andi Kleen <ak@...e.de>
To:	Daniel Walker <dwalker@...sta.com>
Cc:	Björn Steinbrink <B.Steinbrink@....de>,
	eranian@....hp.com, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Re: nmi_watchdog=2 regression in 2.6.21


> If you look at the LOC values you'll notice a lot of time has passed,
> with only one NMI and on only one cpu ..
> 
> It's possible this is something else completely tho ..

It only ticks when the CPU is not idle. If you want to see the "operating 
frequency" run a main(){for(;;;);} for each core. 

-Andi
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