On Fri, Dec 11, 2015 at 04:12:24PM -0800, Andi Kleen wrote: > From: Andi Kleen <[email protected]> > > [The kernel patch needed for this is in tip now > (b16a5b52eb9 perf/x86: Add option to disable ...) > So this user tools patch to make use of it should be merged now] > > Automatically disable collecting branch flags and cycles with > --call-graph lbr. This allows avoiding a bunch of extra MSR > reads in the PMI on Skylake. > > When the kernel doesn't support the new flags they are automatically > cleared in the fallback code. > > v2: Switch to use branch_sample_type instead of sample_type. > Adjust description. > Fix the fallback logic. > Signed-off-by: Andi Kleen <[email protected]>
Acked-by: Jiri Olsa <[email protected]> thanks, jirka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
