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a9faa0cab6
Allow the measurement of thread versus process context switch
performance.
The default stays at 'process' based measurement, like lmbench's lat_ctx
benchmark.
Sample output:
comet:~/tip/tools/perf> taskset 1 ./perf bench sched pipe
# Running sched/pipe benchmark...
# Executed 1000000 pipe operations between two processes
Total time: 4.138 [sec]
4.138729 usecs/op
241620 ops/sec
comet:~/tip/tools/perf> taskset 1 ./perf bench sched pipe --threaded
# Running sched/pipe benchmark...
# Executed 1000000 pipe operations between two threads
Total time: 3.667 [sec]
3.667667 usecs/op
272652 ops/sec
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Link: http://lkml.kernel.org/r/20130917114256.GA31159@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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