MFV r272585:
Split the godfather zio into CPU number's to reduce lock contention. Illumos issue: 5176 lock contention on godfather zio MFC after: 2 weeks
This commit is contained in:
commit
8fb26f5aef
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=272598
@ -2594,10 +2594,12 @@ dump_block_stats(spa_t *spa)
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* all async I/Os to complete.
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* all async I/Os to complete.
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*/
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*/
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if (dump_opt['c']) {
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if (dump_opt['c']) {
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(void) zio_wait(spa->spa_async_zio_root);
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for (int i = 0; i < max_ncpus; i++) {
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spa->spa_async_zio_root = zio_root(spa, NULL, NULL,
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(void) zio_wait(spa->spa_async_zio_root[i]);
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ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
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spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
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ZIO_FLAG_GODFATHER);
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ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
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ZIO_FLAG_GODFATHER);
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}
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}
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}
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if (zcb.zcb_haderrors) {
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if (zcb.zcb_haderrors) {
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@ -1277,7 +1277,9 @@ spa_unload(spa_t *spa)
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* Wait for any outstanding async I/O to complete.
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* Wait for any outstanding async I/O to complete.
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*/
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*/
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if (spa->spa_async_zio_root != NULL) {
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if (spa->spa_async_zio_root != NULL) {
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(void) zio_wait(spa->spa_async_zio_root);
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for (int i = 0; i < max_ncpus; i++)
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(void) zio_wait(spa->spa_async_zio_root[i]);
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kmem_free(spa->spa_async_zio_root, max_ncpus * sizeof (void *));
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spa->spa_async_zio_root = NULL;
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spa->spa_async_zio_root = NULL;
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}
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}
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@ -2213,8 +2215,13 @@ spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config,
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/*
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/*
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* Create "The Godfather" zio to hold all async IOs
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* Create "The Godfather" zio to hold all async IOs
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*/
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*/
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spa->spa_async_zio_root = zio_root(spa, NULL, NULL,
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spa->spa_async_zio_root = kmem_alloc(max_ncpus * sizeof (void *),
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ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER);
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KM_SLEEP);
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for (int i = 0; i < max_ncpus; i++) {
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spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
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ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
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ZIO_FLAG_GODFATHER);
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}
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/*
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/*
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* Parse the configuration into a vdev tree. We explicitly set the
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* Parse the configuration into a vdev tree. We explicitly set the
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@ -3567,8 +3574,13 @@ spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props,
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/*
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/*
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* Create "The Godfather" zio to hold all async IOs
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* Create "The Godfather" zio to hold all async IOs
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*/
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*/
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spa->spa_async_zio_root = zio_root(spa, NULL, NULL,
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spa->spa_async_zio_root = kmem_alloc(max_ncpus * sizeof (void *),
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ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER);
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KM_SLEEP);
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for (int i = 0; i < max_ncpus; i++) {
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spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
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ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
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ZIO_FLAG_GODFATHER);
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}
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/*
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/*
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* Create the root vdev.
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* Create the root vdev.
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@ -206,7 +206,8 @@ struct spa {
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uint64_t spa_failmode; /* failure mode for the pool */
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uint64_t spa_failmode; /* failure mode for the pool */
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uint64_t spa_delegation; /* delegation on/off */
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uint64_t spa_delegation; /* delegation on/off */
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list_t spa_config_list; /* previous cache file(s) */
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list_t spa_config_list; /* previous cache file(s) */
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zio_t *spa_async_zio_root; /* root of all async I/O */
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/* per-CPU array of root of async I/O: */
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zio_t **spa_async_zio_root;
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zio_t *spa_suspend_zio_root; /* root of all suspended I/O */
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zio_t *spa_suspend_zio_root; /* root of all suspended I/O */
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kmutex_t spa_suspend_lock; /* protects suspend_zio_root */
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kmutex_t spa_suspend_lock; /* protects suspend_zio_root */
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kcondvar_t spa_suspend_cv; /* notification of resume */
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kcondvar_t spa_suspend_cv; /* notification of resume */
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@ -1457,7 +1457,7 @@ zio_nowait(zio_t *zio)
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*/
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*/
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spa_t *spa = zio->io_spa;
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spa_t *spa = zio->io_spa;
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zio_add_child(spa->spa_async_zio_root, zio);
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zio_add_child(spa->spa_async_zio_root[CPU_SEQID], zio);
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}
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}
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zio_execute(zio);
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zio_execute(zio);
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