Hi, On Fri, Jul 17, 2015 at 5:55 AM, Peter Zijlstra <pet...@infradead.org> wrote: > On Fri, Jul 17, 2015 at 01:21:06PM +0100, Mark Rutland wrote: >> >> As with my earlier comments, I don't think these can be grouped with >> events (not even from the same PMU given their free-running nature). >> >> They're CPU-affine, so you can associate them with work done on that >> CPU. > > Just record the deltas from them while you're on.
Yes, free-running are already handled by the kernel, the RAPL counters are a good example. The uncore IMC counters (for SNB/IVB/HSW/BDW) client processors is another example. Just compute deltas, and make sure you do not miss a wrap-around of the counter if it is not wide enough to never wrap-around. -- 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/
