Davidlohr Bueso
60758d6668
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 >
2016-10-25 09:50:53 -03:00
Arnaldo Carvalho de Melo
565e69114e
perf bench futex: Use NSEC_PER_USEC
...
Following kernel practices and better documentin
Cc: Adrian Hunter <adrian.hunter@intel.com >
Cc: David Ahern <dsahern@gmail.com >
Cc: Jiri Olsa <jolsa@kernel.org >
Cc: Namhyung Kim <namhyung@kernel.org >
Cc: Steven Rostedt <rostedt@goodmis.org >
Cc: Wang Nan <wangnan0@huawei.com >
Link: http://lkml.kernel.org/n/tip-xncwqxegjp13g2nxih3lp9mx@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2016-08-23 15:37:33 -03:00
Arnaldo Carvalho de Melo
86695f59c9
perf bench futex: Add missing compiler.h header
...
Since these files use __maybe_unused, and that is defined in
linux/compiler.h, include it.
Cc: Adrian Hunter <adrian.hunter@intel.com >
Cc: David Ahern <dsahern@gmail.com >
Cc: Davidlohr Bueso <dbueso@suse.de >
Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp >
Cc: Jiri Olsa <jolsa@kernel.org >
Cc: Namhyung Kim <namhyung@kernel.org >
Cc: Wang Nan <wangnan0@huawei.com >
Link: http://lkml.kernel.org/n/tip-1llbf59ut6xon6ti88jm0n9j@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2016-07-12 15:20:30 -03:00
Arnaldo Carvalho de Melo
9c304f6c71
perf bench: Disentangle headers
...
We should try avoiding that perf.h header, it includes way too much
stuff, making it difficult to use things like setting _GNU_SOURCE only
on a small set of headers.
Cc: Adrian Hunter <adrian.hunter@intel.com >
Cc: David Ahern <dsahern@gmail.com >
Cc: Davidlohr Bueso <dbueso@suse.de >
Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp >
Cc: Jiri Olsa <jolsa@kernel.org >
Cc: Namhyung Kim <namhyung@kernel.org >
Cc: Wang Nan <wangnan0@huawei.com >
Link: http://lkml.kernel.org/n/tip-lb6eg9w1kzrwhv0gm3ho0h54@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2016-07-12 15:19:54 -03:00
Arnaldo Carvalho de Melo
8a15858904
perf bench: Add missing pthread.h include for CPU_*() macros
...
Cc: David Ahern <dsahern@gmail.com >
Cc: Davidlohr Bueso <dbueso@suse.de >
Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp >
Cc: Jiri Olsa <jolsa@kernel.org >
Cc: Namhyung Kim <namhyung@kernel.org >
Cc: Wang Nan <wangnan0@huawei.com >
Link: http://lkml.kernel.org/n/tip-48qbfv7tqs8n8ey74lbyfjtq@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2016-07-12 15:19:52 -03:00
Josh Poimboeuf
4b6ab94eab
perf subcmd: Create subcmd library
...
Move the subcommand-related files from perf to a new library named
libsubcmd.a.
Since we're moving files anyway, go ahead and rename 'exec_cmd.*' to
'exec-cmd.*' to be consistent with the naming of all the other files.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com >
Cc: Jiri Olsa <jolsa@redhat.com >
Cc: Namhyung Kim <namhyung@kernel.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Link: http://lkml.kernel.org/r/c0a838d4c878ab17fee50998811612b2281355c1.1450193761.git.jpoimboe@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2015-12-17 14:27:14 -03:00
Davidlohr Bueso
d65817b4e7
perf bench futex: Support parallel waker threads
...
The futex-wake benchmark only measures wakeups done within a single
process. While this has value in its own, it does not really generate
any hb->lock contention.
A new benchmark 'wake-parallel' is added, by extending the futex-wake
code such that we can measure parallel waker threads. The program output
shows the avg per-thread latency in order to complete its share of
wakeups:
Run summary [PID 13474]: blocking on 512 threads (at [private] futex 0xa88668), 8 threads waking up 64 at a time.
[Run 1]: Avg per-thread latency (waking 64/512 threads) in 0.6230 ms (+-15.31%)
[Run 2]: Avg per-thread latency (waking 64/512 threads) in 0.5175 ms (+-29.95%)
[Run 3]: Avg per-thread latency (waking 64/512 threads) in 0.7578 ms (+-18.03%)
[Run 4]: Avg per-thread latency (waking 64/512 threads) in 0.8944 ms (+-12.54%)
[Run 5]: Avg per-thread latency (waking 64/512 threads) in 1.1204 ms (+-23.85%)
Avg per-thread latency (waking 64/512 threads) in 0.7826 ms (+-9.91%)
Naturally, different combinations of numbers of blocking and waker
threads will exhibit different information.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de >
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com >
Cc: Davidlohr Bueso <dbueso@suse.de >
Link: http://lkml.kernel.org/r/1431110280-20231-1-git-send-email-dave@stgolabs.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com >
2015-05-08 16:23:50 -03:00
