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4241eabf59
This new benchmark finds the total time that is taken to open, mmap,
enable, disable, munmap, close an evlist (time taken for new,
create_maps, config, delete is not counted in).
The evlist can be configured as in perf-record using the
-a,-C,-e,-u,--per-thread,-t,-p options.
The events can be duplicated in the evlist to quickly test performance
with many events using the -n options.
Furthermore, also the number of iterations used to calculate the
statistics is customizable.
Examples:
- Open one dummy event system-wide:
$ sudo ./perf bench internals evlist-open-close
Number of cpus: 4
Number of threads: 1
Number of events: 1 (4 fds)
Number of iterations: 100
Average open-close took: 613.870 usec (+- 32.852 usec)
- Open the group '{cs,cycles}' on CPU 0
$ sudo ./perf bench internals evlist-open-close -e '{cs,cycles}' -C 0
Number of cpus: 1
Number of threads: 1
Number of events: 2 (2 fds)
Number of iterations: 100
Average open-close took: 8503.220 usec (+- 252.652 usec)
- Open 10 'cycles' events for user 0, calculate average over 100 runs
$ sudo ./perf bench internals evlist-open-close -e cycles -n 10 -u 0 -i 100
Number of cpus: 4
Number of threads: 328
Number of events: 10 (13120 fds)
Number of iterations: 100
Average open-close took: 180043.140 usec (+- 2295.889 usec)
Committer notes:
Replaced a deprecated bzero() call with designated initialized zeroing.
Added some missing evlist allocation checks, one noted by Riccardo on
the mailing list.
Minor cosmetic changes (sent in private).
Signed-off-by: Riccardo Mancini <rickyman7@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210809201101.277594-1-rickyman7@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef BENCH_H
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#define BENCH_H
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#include <sys/time.h>
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extern struct timeval bench__start, bench__end, bench__runtime;
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/*
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* The madvise transparent hugepage constants were added in glibc
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* 2.13. For compatibility with older versions of glibc, define these
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* tokens if they are not already defined.
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*
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* PA-RISC uses different madvise values from other architectures and
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* needs to be special-cased.
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*/
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#ifdef __hppa__
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# ifndef MADV_HUGEPAGE
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# define MADV_HUGEPAGE 67
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# endif
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# ifndef MADV_NOHUGEPAGE
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# define MADV_NOHUGEPAGE 68
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# endif
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#else
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# ifndef MADV_HUGEPAGE
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# define MADV_HUGEPAGE 14
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# endif
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# ifndef MADV_NOHUGEPAGE
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# define MADV_NOHUGEPAGE 15
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# endif
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#endif
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int bench_numa(int argc, const char **argv);
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int bench_sched_messaging(int argc, const char **argv);
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int bench_sched_pipe(int argc, const char **argv);
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int bench_syscall_basic(int argc, const char **argv);
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int bench_mem_memcpy(int argc, const char **argv);
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int bench_mem_memset(int argc, const char **argv);
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int bench_mem_find_bit(int argc, const char **argv);
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int bench_futex_hash(int argc, const char **argv);
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int bench_futex_wake(int argc, const char **argv);
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int bench_futex_wake_parallel(int argc, const char **argv);
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int bench_futex_requeue(int argc, const char **argv);
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/* pi futexes */
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int bench_futex_lock_pi(int argc, const char **argv);
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int bench_epoll_wait(int argc, const char **argv);
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int bench_epoll_ctl(int argc, const char **argv);
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int bench_synthesize(int argc, const char **argv);
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int bench_kallsyms_parse(int argc, const char **argv);
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int bench_inject_build_id(int argc, const char **argv);
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int bench_evlist_open_close(int argc, const char **argv);
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#define BENCH_FORMAT_DEFAULT_STR "default"
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#define BENCH_FORMAT_DEFAULT 0
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#define BENCH_FORMAT_SIMPLE_STR "simple"
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#define BENCH_FORMAT_SIMPLE 1
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#define BENCH_FORMAT_UNKNOWN -1
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extern int bench_format;
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extern unsigned int bench_repeat;
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#ifndef HAVE_PTHREAD_ATTR_SETAFFINITY_NP
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#include <pthread.h>
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#include <linux/compiler.h>
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static inline int pthread_attr_setaffinity_np(pthread_attr_t *attr __maybe_unused,
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size_t cpusetsize __maybe_unused,
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cpu_set_t *cpuset __maybe_unused)
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{
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return 0;
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}
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#endif
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#endif
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