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Matthew Ahrens 45579c9515 Reduce taskq and context-switch cost of zio pipe 
When doing a read from disk, ZFS creates 3 ZIO's: a zio_null(), the
logical zio_read(), and then a physical zio. Currently, each of these
results in a separate taskq_dispatch(zio_execute).

On high-read-iops workloads, this causes a significant performance
impact. By processing all 3 ZIO's in a single taskq entry, we reduce the
overhead on taskq locking and context switching.  We accomplish this by
allowing zio_done() to return a "next zio to execute" to zio_execute().

This results in a ~12% performance increase for random reads, from
96,000 iops to 108,000 iops (with recordsize=8k, on SSD's).

Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: George Wilson <george.wilson@delphix.com>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
External-issue: DLPX-59292
Closes #7736
2018-11-08 14:38:28 -08:00
..
abd.c
Update for cppcheck v1.80
2018-01-30 10:27:31 -06:00
arc.c
Fix zfs_arc_max minimum tuning
2018-05-07 17:19:57 -07:00
blkptr.c
OpenZFS 8067 - zdb should be able to dump literal embedded block pointer
2017-07-07 11:28:01 -07:00
bplist.c
Change KM_PUSHPAGE -> KM_SLEEP
2015-01-16 14:41:26 -08:00
bpobj.c
Don't dirty bpobj if it has no entries
2017-05-26 11:42:10 -07:00
bptree.c
OpenZFS 7082 - bptree_iterate() passes wrong args to zfs_dbgmsg()
2017-01-17 14:49:24 -08:00
bqueue.c
Call cv_signal() with mutex held
2017-06-26 14:36:49 -07:00
dbuf_stats.c
Improved dnode allocation and dmu_hold_impl() (#6611)
2017-09-13 15:46:15 -07:00
dbuf.c
Fix race in dnode_check_slots_free()
2018-11-08 14:38:28 -08:00
ddt_zap.c
Change KM_PUSHPAGE -> KM_SLEEP
2015-01-16 14:41:26 -08:00
ddt.c
Cache ddt_get_dedup_dspace() value if there was no ddt changes
2016-12-02 16:59:35 -07:00
dmu_diff.c
OpenZFS 6950 - ARC should cache compressed data
2016-09-13 09:58:33 -07:00
dmu_object.c
Fix 'zfs recv' of non large_dnode send streams
2018-07-06 02:46:51 -07:00
dmu_objset.c
Fix race in dnode_check_slots_free()
2018-11-08 14:38:28 -08:00
dmu_send.c
Fix 'zfs recv' of non large_dnode send streams
2018-07-06 02:46:51 -07:00
dmu_traverse.c
Fix hung z_zvol tasks during 'zfs receive'
2018-05-07 17:19:57 -07:00
dmu_tx.c
OpenZFS 8997 - ztest assertion failure in zil_lwb_write_issue
2018-07-06 02:46:51 -07:00
dmu_zfetch.c
OpenZFS 8835 - Speculative prefetch in ZFS not working for misaligned reads
2018-01-30 10:27:31 -06:00
dmu.c
Fix race in dnode_check_slots_free()
2018-11-08 14:38:28 -08:00
dnode_sync.c
Fix problems receiving reallocated dnodes
2018-07-06 02:46:51 -07:00
dnode.c
Fix race in dnode_check_slots_free()
2018-11-08 14:38:28 -08:00
dsl_bookmark.c
OpenZFS 8377 - Panic in bookmark deletion
2017-06-30 11:11:01 -07:00
dsl_dataset.c
OpenZFS 7600 - zfs rollback should pass target snapshot to kernel
2017-07-04 15:29:52 -07:00
dsl_deadlist.c
OpenZFS 5428 - provide fts(), reallocarray(), and strtonum()
2017-07-08 20:35:35 -07:00
dsl_deleg.c
Performance optimization of AVL tree comparator functions
2016-08-31 14:35:34 -07:00
dsl_destroy.c
OpenZFS 7254 - ztest failed assertion in ztest_dataset_dirobj_verify: dirobjs + 1 == usedobjs
2017-01-27 11:43:42 -08:00
dsl_dir.c
Linux 4.18 compat: inode timespec -> timespec64
2018-07-06 02:46:51 -07:00
dsl_pool.c
Multi-modifier protection (MMP)
2017-07-13 13:54:00 -04:00
dsl_prop.c
Fix dsl_props_set_sync_impl to work with nested nvlist
2016-12-20 18:46:59 -08:00
dsl_scan.c
OpenZFS 6939 - add sysevents to zfs core for commands
2017-07-12 21:28:13 -07:00
dsl_synctask.c
Illumos 4951 - ZFS administrative commands should use reserved space
2015-05-04 09:41:10 -07:00
dsl_userhold.c
OpenZFS 5428 - provide fts(), reallocarray(), and strtonum()
2017-07-08 20:35:35 -07:00
edonr_zfs.c
DLPX-44812 integrate EP-220 large memory scalability
2016-11-29 14:34:27 -08:00
fm.c
Linux 4.18 compat: inode timespec -> timespec64
2018-07-06 02:46:51 -07:00
gzip.c
GZIP compression offloading with QAT accelerator
2017-03-22 17:58:47 -07:00
lz4.c
Fix LZ4_uncompress_unknownOutputSize caused panic
2017-05-19 13:45:46 -07:00
lzjb.c
Change KM_PUSHPAGE -> KM_SLEEP
2015-01-16 14:41:26 -08:00
Makefile.in
Multi-modifier protection (MMP)
2017-07-13 13:54:00 -04:00
metaslab.c
Fix build with CONFIG_GCC_PLUGIN_RANDSTRUCT
2018-07-06 02:46:51 -07:00
mmp.c
module param callbacks check for initialized spa
2018-07-06 02:46:51 -07:00
multilist.c
OpenZFS 7968 - multi-threaded spa_sync()
2017-03-20 18:36:00 -07:00
pathname.c
Add pn_alloc()/pn_free() functions
2016-04-21 09:49:25 -07:00
policy.c
Take user namespaces into account in policy checks
2018-03-14 16:10:38 -07:00
qat_compress.c
Bug fix in qat_compress.c for vmalloc addr check
2018-03-14 16:10:36 -07:00
qat_compress.h
GZIP compression offloading with QAT accelerator
2017-03-22 17:58:47 -07:00
range_tree.c
Performance optimization of AVL tree comparator functions
2016-08-31 14:35:34 -07:00
refcount.c
Linux 4.11 compat: avoid refcount_t name conflict
2017-02-28 16:10:18 -08:00
rrwlock.c
Fix spelling
2017-01-03 11:31:18 -06:00
sa.c
Fix kernel unaligned access on sparc64
2018-07-06 02:46:51 -07:00
sha256.c
DLPX-44812 integrate EP-220 large memory scalability
2016-11-29 14:34:27 -08:00
skein_zfs.c
DLPX-44812 integrate EP-220 large memory scalability
2016-11-29 14:34:27 -08:00
spa_boot.c
Add linux kernel module support
2010-08-31 13:41:58 -07:00
spa_config.c
Remove vn_rename and vn_remove dependency
2018-03-14 16:10:36 -07:00
spa_errlog.c
OpenZFS 5428 - provide fts(), reallocarray(), and strtonum()
2017-07-08 20:35:35 -07:00
spa_history.c
Emit history events for 'zpool create'
2017-12-04 17:21:03 -08:00
spa_misc.c
Add pool state /proc entry, "SUSPENDED" pools
2018-07-06 02:46:51 -07:00
spa_stats.c
Add pool state /proc entry, "SUSPENDED" pools
2018-07-06 02:46:51 -07:00
spa.c
Update mmp_delay on sync or skipped, failed write
2018-05-07 17:19:57 -07:00
space_map.c
OpenZFS 8023 - Panic destroying a metaslab deferred range tree
2017-04-09 16:12:35 -07:00
space_reftree.c
OpenZFS 6328 - Fix cstyle errors in zfs codebase
2017-01-12 09:42:11 -08:00
trace.c
OpenZFS 6531 - Provide mechanism to artificially limit disk performance
2016-05-26 10:11:51 -07:00
txg.c
OpenZFS 8063 - verify that we do not attempt to access inactive txg
2017-05-10 13:52:22 -04:00
uberblock.c
Multi-modifier protection (MMP)
2017-07-13 13:54:00 -04:00
unique.c
Performance optimization of AVL tree comparator functions
2016-08-31 14:35:34 -07:00
vdev_cache.c
Fix wrong offset args in vdev_cache_write
2017-03-28 11:06:22 -07:00
vdev_disk.c
Revert "zpool reopen should detect expanded devices"
2018-09-13 10:11:42 -07:00
vdev_file.c
Skip spurious resilver IO on raidz vdev
2017-05-12 17:28:03 -07:00
vdev_label.c
Update mmp_delay on sync or skipped, failed write
2018-05-07 17:19:57 -07:00
vdev_mirror.c
vdev_mirror: load balancing fixes
2018-01-30 10:27:30 -06:00
vdev_missing.c
Skip spurious resilver IO on raidz vdev
2017-05-12 17:28:03 -07:00
vdev_queue.c
vdev_mirror: load balancing fixes
2018-01-30 10:27:30 -06:00
vdev_raidz_math_aarch64_neon_common.h
ABD raidz NEON support
2016-11-29 14:34:33 -08:00
vdev_raidz_math_aarch64_neon.c
codebase style improvements for OpenZFS 6459 port
2017-01-22 13:25:40 -08:00
vdev_raidz_math_aarch64_neonx2.c
ABD raidz NEON support
2016-11-29 14:34:33 -08:00
vdev_raidz_math_avx2.c
ABD raidz avx512f support
2016-11-29 14:34:33 -08:00
vdev_raidz_math_avx512bw.c
ABD: Adapt avx512bw raidz assembly
2016-12-15 17:31:33 -08:00
vdev_raidz_math_avx512f.c
Use cstyle -cpP in make cstyle check
2016-12-12 10:46:26 -08:00
vdev_raidz_math_impl.h
codebase style improvements for OpenZFS 6459 port
2017-01-22 13:25:40 -08:00
vdev_raidz_math_scalar.c
ABD Vectorized raidz
2016-11-29 14:34:33 -08:00
vdev_raidz_math_sse2.c
ABD raidz avx512f support
2016-11-29 14:34:33 -08:00
vdev_raidz_math_ssse3.c
codebase style improvements for OpenZFS 6459 port
2017-01-22 13:25:40 -08:00
vdev_raidz_math.c
codebase style improvements for OpenZFS 6459 port
2017-01-22 13:25:40 -08:00
vdev_raidz.c
Linux 4.14 compat: CONFIG_GCC_PLUGIN_RANDSTRUCT
2017-12-04 17:21:39 -08:00
vdev_root.c
Skip spurious resilver IO on raidz vdev
2017-05-12 17:28:03 -07:00
vdev.c
Revert "zpool reopen should detect expanded devices"
2018-09-13 10:11:42 -07:00
zap_leaf.c
Fix ENOSPC in "Handle zap_add() failures in ..."
2018-07-06 02:46:51 -07:00
zap_micro.c
Fix ENOSPC in "Handle zap_add() failures in ..."
2018-07-06 02:46:51 -07:00
zap.c
Fix ENOSPC in "Handle zap_add() failures in ..."
2018-07-06 02:46:51 -07:00
zfeature_common.c
OpenZFS 2932 - support crash dumps to raidz, etc. pools
2017-04-10 10:24:17 -07:00
zfeature.c
OpenZFS 6328 - Fix cstyle errors in zfs codebase
2017-01-12 09:42:11 -08:00
zfs_acl.c
OpenZFS 8966 - Source file zfs_acl.c, function zfs_aclset_common contains a use after end of the lifetime of a local variable
2018-03-14 16:10:36 -07:00
zfs_byteswap.c
Add linux kernel module support
2010-08-31 13:41:58 -07:00
zfs_ctldir.c
Correctly handle errors from kern_path
2018-07-06 02:46:51 -07:00
zfs_debug.c
Add line info and SET_ERROR() to ZFS debug log
2017-07-25 23:09:48 -07:00
zfs_dir.c
Fix ENOSPC in "Handle zap_add() failures in ..."
2018-07-06 02:46:51 -07:00
zfs_fm.c
OpenZFS 6939 - add sysevents to zfs core for commands
2017-07-12 21:28:13 -07:00
zfs_fuid.c
Rename zfs_sb_t -> zfsvfs_t
2017-03-10 09:51:33 -08:00
zfs_ioctl.c
Allow inherited properties in zfs_check_settable()
2018-07-06 02:46:51 -07:00
zfs_log.c
OpenZFS 7578 - Fix/improve some aspects of ZIL writing
2017-06-09 09:15:37 -07:00
zfs_onexit.c
zfsdev_getminor() should check for invalid file handles
2015-06-22 17:02:13 -07:00
zfs_replay.c
Rename zfs_sb_t -> zfsvfs_t
2017-03-10 09:51:33 -08:00
zfs_rlock.c
Fix spelling
2017-01-03 11:31:18 -06:00
zfs_sa.c
Modifying XATTRs doesnt change the ctime
2017-09-13 16:05:18 -07:00
zfs_vfsops.c
Revert "Long hold the dataset during upgrade"
2017-12-06 13:25:40 -06:00
zfs_vnops.c
Fix ENOSPC in "Handle zap_add() failures in ..."
2018-07-06 02:46:51 -07:00
zfs_znode.c
Linux 4.18 compat: inode timespec -> timespec64
2018-07-06 02:46:51 -07:00
zil.c
OpenZFS 8997 - ztest assertion failure in zil_lwb_write_issue
2018-07-06 02:46:51 -07:00
zio_checksum.c
Remove dependency on linear ABD
2017-03-29 12:24:51 -07:00
zio_compress.c
DLPX-44812 integrate EP-220 large memory scalability
2016-11-29 14:34:27 -08:00
zio_inject.c
Inject zinject(8) a percentage amount of dev errs
2017-06-16 17:21:11 -07:00
zio.c
Reduce taskq and context-switch cost of zio pipe
2018-11-08 14:38:28 -08:00
zle.c
Fix zle_decompress out of bound access
2018-03-14 16:10:36 -07:00
zpl_ctldir.c
RHEL 7.5 compat: FMODE_KABI_ITERATE
2018-05-07 17:19:57 -07:00
zpl_export.c
Use cstyle -cpP in make cstyle check
2016-12-12 10:46:26 -08:00
zpl_file.c
RHEL 7.5 compat: FMODE_KABI_ITERATE
2018-05-07 17:19:57 -07:00
zpl_inode.c
Linux 4.18 compat: inode timespec -> timespec64
2018-07-06 02:46:51 -07:00
zpl_super.c
Fix zpl_mount() deadlock
2018-07-06 02:46:51 -07:00
zpl_xattr.c
Update for cppcheck v1.80
2018-01-30 10:27:31 -06:00
zrlock.c
OpenZFS 3746 - ZRLs are racy
2017-01-23 10:35:58 -08:00
zvol.c
Linux compat 4.18: check_disk_size_change()
2018-07-06 02:46:51 -07:00