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authorDavidlohr Bueso <dave@stgolabs.net>2017-11-26 20:20:59 -0800
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-11-30 14:02:05 -0300
commit3b2323c2c1c4acf8961cfcdddcee9889daaa21e3 (patch)
treea366e8b5137d89f10885ff7d0e6ade8ed0cbf047 /tools/build
parent17a68b835921c4664929376447cae5e3374ce2a7 (diff)
downloadlinux-3b2323c2c1c4acf8961cfcdddcee9889daaa21e3.tar.bz2
perf bench futex: Use cpumaps
It was reported that the whole futex bench breaks when dealing with non-contiguously numbered cpus. $ echo 0 | sudo tee /sys/devices/system/cpu/cpu3/online $ ./perf bench futex all perf: pthread_create: Operation not permitted Run summary [PID 14934]: 7 threads, each .... James had implemented an approach with cpumaps that use an in house flavor. Instead of re-inventing the wheel, I've redone the patch such that we use the perf's util/cpumap.c interface instead. Applies to all futex benchmarks. Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Originally-from: James Yang <james.yang@arm.com> Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Cc: Davidlohr Bueso <dbueso@suse.de> Cc: Kim Phillips <kim.phillips@arm.com> Link: http://lkml.kernel.org/r/20171127042101.3659-2-dave@stgolabs.net Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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