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| author | Roman Pen <r.peniaev@gmail.com> | 2016-04-23 13:44:09 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-04-25 08:53:18 -0600 |
| commit | 7338236ab386515bbcecf5c05bca6a034c12d0b9 (patch) | |
| tree | 461034e37be148ddd0a8ef0676b4a7b0635eb5dd /btreplay | |
| parent | f6541f75f2822252b057f08e9f5f0c40d4079a8c (diff) | |
| download | blktrace-7338236ab386515bbcecf5c05bca6a034c12d0b9.tar.gz blktrace-7338236ab386515bbcecf5c05bca6a034c12d0b9.tar.bz2 | |
btreplay: fix sched_{set|get}affinity
getpid() is a pid of a process, at least tid must be provided.
But if zero is passed, then calling thread will be used.
That exactly what is needed.
Signed-off-by: Roman Pen <r.peniaev@gmail.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: <linux-btrace@vger.kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'btreplay')
| -rw-r--r-- | btreplay/btreplay.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/btreplay/btreplay.c b/btreplay/btreplay.c index 2a1525e..5bf47ff 100644 --- a/btreplay/btreplay.c +++ b/btreplay/btreplay.c @@ -513,7 +513,7 @@ realloc: size = CPU_ALLOC_SIZE(nrcpus); CPU_ZERO_S(size, cpus); - if (sched_getaffinity(getpid(), size, cpus)) { + if (sched_getaffinity(0, size, cpus)) { if( errno == EINVAL && nrcpus < (4096<<4) ) { CPU_FREE(cpus); nrcpus <<= 1; @@ -552,16 +552,17 @@ static void pin_to_cpu(struct thr_info *tip) CPU_ZERO_S(size, cpus); CPU_SET_S(tip->cpu, size, cpus); - if (sched_setaffinity(getpid(), size, cpus)) { + if (sched_setaffinity(0, size, cpus)) { fatal("sched_setaffinity", ERR_SYSCALL, "Failed to pin CPU\n"); /*NOTREACHED*/ } + assert(tip->cpu == sched_getcpu()); if (verbose > 1) { int i; cpu_set_t *now = CPU_ALLOC(ncpus); - (void)sched_getaffinity(getpid(), size, now); + (void)sched_getaffinity(0, size, now); fprintf(tip->vfp, "Pinned to CPU %02d ", tip->cpu); for (i = 0; i < ncpus; i++) fprintf(tip->vfp, "%1d", CPU_ISSET_S(i, size, now)); |