Quoting Alexander Motin <mav_at_FreeBSD.org> (from Sun, 29 Aug 2010 16:10:00 +0300): > I have actively tested this code for a few days on my amd64 Core2Duo > laptop and i386 Core-i5 desktop system. With C2/C3 states enabled > systems experience only about 100-150 interrupts per second, having HZ > set to 1000. These events mostly caused by several event-greedy > processes in our tree. I have traced and hacked several most aggressive > ones in this patch: http://people.freebsd.org/~mav/tm6292_idle.patch . > It allowed me to reduce down to as low as 50 interrupts per system, > including IPIs! It looks like you are comming to a point where Powertop would be helpful. There's a dtracified version of it available at the opensolaris site (it would at least need some additional dtrace probes in our kernel). http://hub.opensolaris.org/bin/view/Project+tesla/Powertop Bye, Alexander. -- Our customers' paperwork is profit. Our own paperwork is loss. http://www.Leidinger.net Alexander _at_ Leidinger.net: PGP ID = B0063FE7 http://www.FreeBSD.org netchild _at_ FreeBSD.org : PGP ID = 72077137Received on Wed Sep 01 2010 - 12:18:43 UTC
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