Author: mav
Date: Tue Mar 10 15:18:53 2020
New Revision: 358835
URL: https://svnweb.freebsd.org/changeset/base/358835
Log:
MFC r358580: Increase number of write completion threads, matching ZoL.
Our iSCSI benchmarks on a large 80-core system show that previous limit
of 8 threads can be a bottleneck. At some points this change increases
write IOPS by as much as 50%. I am still not sure that so many threads
is really required, but we tested lower amounts and got no significant
benefits, while latencies were a bit worse, so decided to not diverge.
Modified:
stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c
==============================================================================
--- stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c Tue Mar
10 13:39:05 2020 (r358834)
+++ stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c Tue Mar
10 15:18:53 2020 (r358835)
@@ -155,7 +155,7 @@ const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ
/* ISSUE ISSUE_HIGH INTR INTR_HIGH */
{ ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* NULL */
{ ZTI_N(8), ZTI_NULL, ZTI_P(12, 8), ZTI_NULL }, /* READ */
- { ZTI_BATCH, ZTI_N(5), ZTI_N(8), ZTI_N(5) }, /* WRITE */
+ { ZTI_BATCH, ZTI_N(5), ZTI_P(12, 8), ZTI_N(5) }, /* WRITE */
{ ZTI_P(12, 8), ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* FREE */
{ ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* CLAIM */
{ ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* IOCTL */
_______________________________________________
[email protected] mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "[email protected]"
