Re: [Discuss] [PATCH] ipmi: use round_jiffies on timers to reducetimer overhead/wakeups
From: Arjan van de Ven
Date: Wed Oct 21 2009 - 16:57:16 EST
Corey Minyard wrote:
Certainly. Yes, some (probably most) IPMI hardware does not use
interrupts, and unfortunately, it's not just older machines. The driver
used to poll more slowly, but in many cases the performance was
unacceptable.
... but now it burns quite a bit of power (I'd not be surprised if it is 10 Watts extra on a 70W server)
is there any way to poll slowly until there is active ipmi traffic, during which we can then poll a bit faster.
... and then go back to slow polling when there is an ipmi idle period ?
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