ran wainstein
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Question about CPU Power Management
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ran wainstein
04/29/2011 3:07 PM
post85322
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Question about CPU Power Management
Hi,
I've been reading some documentation about CPU PM, and have some question you guys might be able to answer :
1. PM Decides to put CPU in low-power sleep, at this point - PM does not know when is the next scheduled timer event.
Lets say next timer event is in 100us, and it takes 150us for the HW enter lop-power mode.
CPU goes to low-power sleep, and wakeup right away due to timer wakeup. BUT - Timer interrupt is served in 50us delay.
is this something that being\should be handled?
2. Assume power() callout is called and put the CPU into a low-power sleep. now there is a wakeup event,where is
execution resumes from ? callout ?
Thanks,
Ran
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