perf bench futex: Sanitize numeric parameters
authorDavidlohr Bueso <dave@stgolabs.net>
Mon, 24 Oct 2016 20:56:53 +0000 (13:56 -0700)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Tue, 25 Oct 2016 12:50:53 +0000 (09:50 -0300)
commit60758d6668b3e2fa8e5fd143d24d0425203d007e
tree4e825f050b8853a68ec3e711a6e7d0c458b1e61f
parente2e1680fda1573ebfdd6bba5d58f978044746993
perf bench futex: Sanitize numeric parameters

This gets rid of oddities such as:

  perf bench futex hash -t -4
  perf: calloc: Cannot allocate memory

Runtime (and many more) are equally busted, i.e. run for bogus amounts of
time. Just use the abs, instead of, for example errorring out.

Committer note:

After the patch:

  $ perf bench futex hash -t -4
  # Running 'futex/hash' benchmark:
  Run summary [PID 10178]: 4 threads, each operating on 1024 [private] futexes for 10 secs.

  [thread  0] futexes: 0x34f9fa0 ... 0x34faf9c [ 4702208 ops/sec ]
  [thread  1] futexes: 0x34fb140 ... 0x34fc13c [ 4707020 ops/sec ]
  [thread  2] futexes: 0x34fc2e0 ... 0x34fd2dc [ 4711526 ops/sec ]
  [thread  3] futexes: 0x34fd480 ... 0x34fe47c [ 4709683 ops/sec ]

  Averaged 4707609 operations/sec (+- 0.04%), total secs = 10
  $

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: http://lkml.kernel.org/r/1477342613-9938-3-git-send-email-dave@stgolabs.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/bench/futex-hash.c
tools/perf/bench/futex-lock-pi.c
tools/perf/bench/futex-requeue.c
tools/perf/bench/futex-wake-parallel.c
tools/perf/bench/futex-wake.c
tools/perf/bench/futex.h