Messages in this thread | | | Subject | Re: [PATCH 4/6 -tip] perf_counter: Add Generalized Hardware interrupt support for AMD | From | Jaswinder Singh Rajput <> | Date | Fri, 03 Jul 2009 17:31:55 +0530 |
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On Wed, 2009-07-01 at 13:24 +0200, Ingo Molnar wrote: > * Jaswinder Singh Rajput <jaswinder@kernel.org> wrote: > > > > > $ ./perf stat -e interrupts -e masked -e int-pending-mask-cycles -- ls -lR /usr/include/ > /dev/null > > > > Performance counter stats for 'ls -lR /usr/include/': > > > > 377 interrupts > > 53429936 int-mask-cycles > > 1119 int-pending-mask-cycles > > > > 0.371457539 seconds time elapsed > > Agreed, this is another useful generalization - and the 'cycles > pending' metrics are not retrievable via any software means. > > We could and should probably add a software counter for hardirqs as > wel. That would allow the vector/irqnr information to be passed in, > and it would allow architectures without irq metrics in the PMU to > have this counter too. >
Please let me know that addition of software counter will be in this patch or we can do it incrementally after this patch.
Thanks, -- JSR
http://userweb.kernel.org/~jaswinder/
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