Stephane Eranian wrote on Wednesday, November 15, 2006 2:24 PM > Here is a patch which adds an idle notifier to IA-64. It clones > the one in X86-64. You can register a callback via the notifier > and you get called when: > - entering the lowest level of the idle loop > - exiting the lowest level of the idle loop, either normally > or to process an interrupt > > Basically, you can monitor useful vs. useless work accomplished > by the idle thread on each processor. Is idle notifier a light weight callback thingy? I happen to work on an application environment that cycles CPUs into gazillion nano second sleep due to tons of sleep / wake up activity from thousands of processes. I'm just checking and hope this notifier chain isn't going to add significant overhead when cycling through busy/idle. - Ken - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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