On Thu, 2013-08-08 at 17:04 +0800, ethan.zhao wrote: > So, it's Peter's patch working………
Yes. My patch killed the nohz tick start/stop overhead prior to 3.8, but in 3.8, the menu governor changes added more high frequency timer banging that negated its effect. In 3.9, mwait went away, making core2 boxen very sad, and in 3.10 all of x86 got generic idle, making my boxen even sadder. select_idle_sibling() (the thing that makes us schedule pipe-test and many other things cross core if there's an idle core available) has always been two-faced, doing both good and evil.. but with recent work, it's leaning more toward evil than ever before. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
