From: Davidlohr Bueso <d...@stgolabs.net> 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 <dbu...@suse.de> Tested-by: Arnaldo Carvalho de Melo <a...@redhat.com> Link: http://lkml.kernel.org/r/1477342613-9938-3-git-send-email-d...@stgolabs.net Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/bench/futex-hash.c | 4 ++++ tools/perf/bench/futex-lock-pi.c | 3 +++ tools/perf/bench/futex-requeue.c | 2 ++ tools/perf/bench/futex-wake-parallel.c | 4 ++++ tools/perf/bench/futex-wake.c | 3 +++ tools/perf/bench/futex.h | 4 ++++ 6 files changed, 20 insertions(+) diff --git a/tools/perf/bench/futex-hash.c b/tools/perf/bench/futex-hash.c index da04b8c5568a..bfbb6b5f609c 100644 --- a/tools/perf/bench/futex-hash.c +++ b/tools/perf/bench/futex-hash.c @@ -130,6 +130,8 @@ int bench_futex_hash(int argc, const char **argv, } ncpus = sysconf(_SC_NPROCESSORS_ONLN); + nsecs = futexbench_sanitize_numeric(nsecs); + nfutexes = futexbench_sanitize_numeric(nfutexes); sigfillset(&act.sa_mask); act.sa_sigaction = toggle_done; @@ -137,6 +139,8 @@ int bench_futex_hash(int argc, const char **argv, if (!nthreads) /* default to the number of CPUs */ nthreads = ncpus; + else + nthreads = futexbench_sanitize_numeric(nthreads); worker = calloc(nthreads, sizeof(*worker)); if (!worker) diff --git a/tools/perf/bench/futex-lock-pi.c b/tools/perf/bench/futex-lock-pi.c index 7032e4643c65..465012b320ee 100644 --- a/tools/perf/bench/futex-lock-pi.c +++ b/tools/perf/bench/futex-lock-pi.c @@ -152,6 +152,7 @@ int bench_futex_lock_pi(int argc, const char **argv, goto err; ncpus = sysconf(_SC_NPROCESSORS_ONLN); + nsecs = futexbench_sanitize_numeric(nsecs); sigfillset(&act.sa_mask); act.sa_sigaction = toggle_done; @@ -159,6 +160,8 @@ int bench_futex_lock_pi(int argc, const char **argv, if (!nthreads) nthreads = ncpus; + else + nthreads = futexbench_sanitize_numeric(nthreads); worker = calloc(nthreads, sizeof(*worker)); if (!worker) diff --git a/tools/perf/bench/futex-requeue.c b/tools/perf/bench/futex-requeue.c index 2b9705a8734c..fd4ee95b689a 100644 --- a/tools/perf/bench/futex-requeue.c +++ b/tools/perf/bench/futex-requeue.c @@ -128,6 +128,8 @@ int bench_futex_requeue(int argc, const char **argv, if (!nthreads) nthreads = ncpus; + else + nthreads = futexbench_sanitize_numeric(nthreads); worker = calloc(nthreads, sizeof(*worker)); if (!worker) diff --git a/tools/perf/bench/futex-wake-parallel.c b/tools/perf/bench/futex-wake-parallel.c index 2c8fa67ad537..beaa6c142477 100644 --- a/tools/perf/bench/futex-wake-parallel.c +++ b/tools/perf/bench/futex-wake-parallel.c @@ -217,8 +217,12 @@ int bench_futex_wake_parallel(int argc, const char **argv, sigaction(SIGINT, &act, NULL); ncpus = sysconf(_SC_NPROCESSORS_ONLN); + nwaking_threads = futexbench_sanitize_numeric(nwaking_threads); + if (!nblocked_threads) nblocked_threads = ncpus; + else + nblocked_threads = futexbench_sanitize_numeric(nblocked_threads); /* some sanity checks */ if (nwaking_threads > nblocked_threads || !nwaking_threads) diff --git a/tools/perf/bench/futex-wake.c b/tools/perf/bench/futex-wake.c index e246b1b8388a..46efcb98b5a4 100644 --- a/tools/perf/bench/futex-wake.c +++ b/tools/perf/bench/futex-wake.c @@ -129,6 +129,7 @@ int bench_futex_wake(int argc, const char **argv, } ncpus = sysconf(_SC_NPROCESSORS_ONLN); + nwakes = futexbench_sanitize_numeric(nwakes); sigfillset(&act.sa_mask); act.sa_sigaction = toggle_done; @@ -136,6 +137,8 @@ int bench_futex_wake(int argc, const char **argv, if (!nthreads) nthreads = ncpus; + else + nthreads = futexbench_sanitize_numeric(nthreads); worker = calloc(nthreads, sizeof(*worker)); if (!worker) diff --git a/tools/perf/bench/futex.h b/tools/perf/bench/futex.h index b2e06d1190d0..ba7c735c0c62 100644 --- a/tools/perf/bench/futex.h +++ b/tools/perf/bench/futex.h @@ -7,6 +7,7 @@ #ifndef _FUTEX_H #define _FUTEX_H +#include <stdlib.h> #include <unistd.h> #include <sys/syscall.h> #include <sys/types.h> @@ -99,4 +100,7 @@ static inline int pthread_attr_setaffinity_np(pthread_attr_t *attr, } #endif +/* User input sanitation */ +#define futexbench_sanitize_numeric(__n) abs((__n)) + #endif /* _FUTEX_H */ -- 2.7.4
