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MFp4: - Allow to tune number of spa_zio_* threads.

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- Reduce default number of spa_zio_* threads to N*spa_zio_issue
	  plus N*spa_zio_intr threads per ZIO type, where N is the number
	  of CPUs.
	- Put ZIO type number in thread's name.
This commit is contained in:
Pawel Jakub Dawidek 2007-04-14 12:20:06 +00:00
parent d72a615878
commit c98fbf0418
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=168712
2 changed files with 34 additions and 14 deletions
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24
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c
View File

@ -58,7 +58,13 @@
#include <sys/fs/zfs.h>
#include <sys/callb.h>
int zio_taskq_threads = 8;
int zio_taskq_threads = 0;
SYSCTL_DECL(_vfs_zfs);
SYSCTL_NODE(_vfs_zfs, OID_AUTO, zio, CTLFLAG_RW, 0, "ZFS ZIO");
TUNABLE_INT("vfs.zfs.zio.taskq_threads", &zio_taskq_threads);
SYSCTL_INT(_vfs_zfs_zio, OID_AUTO, taskq_threads, CTLFLAG_RW,
&zio_taskq_threads, 0, "Number of ZIO threads per ZIO type");
/*
* ==========================================================================
@ -111,6 +117,8 @@ static void
spa_activate(spa_t *spa)
{
int t;
int nthreads = zio_taskq_threads;
char name[32];
ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED);
@ -118,13 +126,15 @@ spa_activate(spa_t *spa)
spa->spa_normal_class = metaslab_class_create();
if (nthreads == 0)
nthreads = mp_ncpus;
for (t = 0; t < ZIO_TYPES; t++) {
spa->spa_zio_issue_taskq[t] = taskq_create("spa_zio_issue",
zio_taskq_threads, maxclsyspri, 50, INT_MAX,
TASKQ_PREPOPULATE);
spa->spa_zio_intr_taskq[t] = taskq_create("spa_zio_intr",
zio_taskq_threads, maxclsyspri, 50, INT_MAX,
TASKQ_PREPOPULATE);
snprintf(name, sizeof(name), "spa_zio_issue %d", t);
spa->spa_zio_issue_taskq[t] = taskq_create(name, nthreads,
maxclsyspri, 50, INT_MAX, TASKQ_PREPOPULATE);
snprintf(name, sizeof(name), "spa_zio_intr %d", t);
spa->spa_zio_intr_taskq[t] = taskq_create(name, nthreads,
maxclsyspri, 50, INT_MAX, TASKQ_PREPOPULATE);
}
rw_init(&spa->spa_traverse_lock, NULL, RW_DEFAULT, NULL);

24
sys/contrib/opensolaris/uts/common/fs/zfs/spa.c
View File

@ -58,7 +58,13 @@
#include <sys/fs/zfs.h>
#include <sys/callb.h>
int zio_taskq_threads = 8;
int zio_taskq_threads = 0;
SYSCTL_DECL(_vfs_zfs);
SYSCTL_NODE(_vfs_zfs, OID_AUTO, zio, CTLFLAG_RW, 0, "ZFS ZIO");
TUNABLE_INT("vfs.zfs.zio.taskq_threads", &zio_taskq_threads);
SYSCTL_INT(_vfs_zfs_zio, OID_AUTO, taskq_threads, CTLFLAG_RW,
&zio_taskq_threads, 0, "Number of ZIO threads per ZIO type");
/*
* ==========================================================================
@ -111,6 +117,8 @@ static void
spa_activate(spa_t *spa)
{
int t;
int nthreads = zio_taskq_threads;
char name[32];
ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED);
@ -118,13 +126,15 @@ spa_activate(spa_t *spa)
spa->spa_normal_class = metaslab_class_create();
if (nthreads == 0)
nthreads = mp_ncpus;
for (t = 0; t < ZIO_TYPES; t++) {
spa->spa_zio_issue_taskq[t] = taskq_create("spa_zio_issue",
zio_taskq_threads, maxclsyspri, 50, INT_MAX,
TASKQ_PREPOPULATE);
spa->spa_zio_intr_taskq[t] = taskq_create("spa_zio_intr",
zio_taskq_threads, maxclsyspri, 50, INT_MAX,
TASKQ_PREPOPULATE);
snprintf(name, sizeof(name), "spa_zio_issue %d", t);
spa->spa_zio_issue_taskq[t] = taskq_create(name, nthreads,
maxclsyspri, 50, INT_MAX, TASKQ_PREPOPULATE);
snprintf(name, sizeof(name), "spa_zio_intr %d", t);
spa->spa_zio_intr_taskq[t] = taskq_create(name, nthreads,
maxclsyspri, 50, INT_MAX, TASKQ_PREPOPULATE);
}
rw_init(&spa->spa_traverse_lock, NULL, RW_DEFAULT, NULL);