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| author |   Davidlohr Bueso <dave@stgolabs.net> | 2017-11-26 20:20:59 -0800 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-11-30 14:02:05 -0300 |
| commit | 3b2323c2c1c4acf8961cfcdddcee9889daaa21e3 (patch) | |
| tree | a366e8b5137d89f10885ff7d0e6ade8ed0cbf047 /tools/perf/Makefile.config | |
| parent | Documentation: Add Arnaldo Melo to list of enforcement statement endorsers (diff) | |
| download | wireguard-linux-3b2323c2c1c4acf8961cfcdddcee9889daaa21e3.tar.xz wireguard-linux-3b2323c2c1c4acf8961cfcdddcee9889daaa21e3.zip | |
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>
Diffstat (limited to 'tools/perf/Makefile.config')
0 files changed, 0 insertions, 0 deletions