Messages in this thread | | | Date | Thu, 6 Mar 2003 23:59:04 +0000 | From | John Levon <> | Subject | Re: HT and idle = poll |
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On Thu, Mar 06, 2003 at 02:22:48PM -0800, Martin J. Bligh wrote:
> BTW, could someone give a brief summary of why idle=poll is needed for > oprofile, I'd love to add it do the "documentation for dummies" file I > was writing.
Because events like CPU_CLK_UNHALTED don't tick when the cpu is halted, so the idle time doesn't show up properly in the kernel profile. idle=poll doesn't hlt so the profile for poll_idle() reflects the actual idle percentage.
Something like that anyway.
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