On 3/20/2013 5:27 PM, Steven Rostedt wrote:
I'm not sure I would recommend idle=poll either. It would certainly work, but it goes to the other extreme. You think NO_HZ=n drains a battery? Try idle=poll.
do not ever use idle=poll on anything production.. really bad idea. if you temporary cannot cope with the latency, you can use the PMQOS system to limit (including going all the way to idle=poll). but using idle=poll completely is very nasty for the hardware. In addition we should document that idle=poll will cost you peak performance, possibly quite a bit. the same is true for the kernel paramter to some extend; it's there to work around broken bioses/hardware/etc; if you have a latency/runtime requirement, it's much better to use PMQOS for this from userspace. -- 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/
