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| author | mav <mav@FreeBSD.org> | 2014-06-17 08:09:40 +0000 |
|---|---|---|
| committer | mav <mav@FreeBSD.org> | 2014-06-17 08:09:40 +0000 |
| commit | 7b99979e56176d928b7d97a29875a26f25f74936 (patch) | |
| tree | e1809f48d7900eca83a21e2eb54b7c7969093258 | |
| parent | d418fd00cccabf30d672bf6253a9a501cec23629 (diff) | |
| download | FreeBSD-src-7b99979e56176d928b7d97a29875a26f25f74936.zip FreeBSD-src-7b99979e56176d928b7d97a29875a26f25f74936.tar.gz | |
MFC r267029, r267038:
Replace gethrtime() with cpu_ticks(), as source of random for the taskqueue
selection. gethrtime() in our port updated with HZ rate, so unusable for
this specific purpose, completely draining benefit of multiple taskqueues.
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c index 6ab48ca..adee7b6 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c @@ -953,7 +953,11 @@ spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, if (tqs->stqs_count == 1) { tq = tqs->stqs_taskq[0]; } else { +#ifdef _KERNEL + tq = tqs->stqs_taskq[cpu_ticks() % tqs->stqs_count]; +#else tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count]; +#endif } taskq_dispatch_ent(tq, func, arg, flags, ent); |
