Glad to see you fixed the PPC problem.
On Thu, Feb 16, 2012 at 5:57 AM, Paul Mackerras <pau...@samba.org> wrote: > On Thu, Feb 16, 2012 at 03:48:22PM +1100, Anton Blanchard wrote: >> >> perf on POWER stopped working after commit e050e3f0a71b (perf: Fix >> broken interrupt rate throttling). That patch exposed a bug in >> the POWER perf_events code. >> >> Since the PMCs count upwards and take an exception when the top bit >> is set, we want to write 0x80000000 - left in power_pmu_start. We were >> instead programming in left which effectively disables the counter >> until we eventually hit 0x80000000. This could take seconds or longer. >> >> With the patch applied I get the expected number of samples: >> >> # taskset -c 0 yes > /dev/null & >> # perf record -C 0 -a sleep 10 >> # perf report -D | grep SAMPLE | tail -1 >> SAMPLE events: 9948 >> >> Signed-off-by: Anton Blanchard <an...@samba.org> > > Acked-by: Paul Mackerras <pau...@samba.org> _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
