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Matthew Ahrens 62840030a7 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
2018-08-02 15:51:45 -07:00
..
abd.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
aggsum.c
Fix preemptible warning in aggsum_add()
2018-06-07 15:55:11 -07:00
arc.c
OpenZFS 9465 - ARC check for 'anon_size > arc_c/2' can stall the system
2018-07-30 11:30:41 -07:00
blkptr.c
Undo c89 workarounds to match with upstream
2017-11-04 13:25:13 -07:00
bplist.c
Change KM_PUSHPAGE -> KM_SLEEP
2015-01-16 14:41:26 -08:00
bpobj.c
OpenZFS 7614, 9064 - zfs device evacuation/removal
2018-04-14 12:16:17 -07:00
bptree.c
Native Encryption for ZFS on Linux
2017-08-14 10:36:48 -07:00
bqueue.c
Call cv_signal() with mutex held
2017-06-26 14:36:49 -07:00
cityhash.c
OpenZFS 8484 - Implement aggregate sum and use for arc counters
2018-06-06 09:35:59 -07:00
dbuf_stats.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
dbuf.c
Fix OpenZFS 9337 mismerge
2018-08-02 10:21:48 -07:00
ddt_zap.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
ddt.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
dmu_diff.c
Fix issues found with zfs diff
2018-05-01 11:24:20 -07:00
dmu_object.c
OpenZFS 9438 - Holes can lose birth time info if a block has a mix of birth times
2018-07-30 09:27:49 -07:00
dmu_objset.c
OpenZFS 9337 - zfs get all is slow due to uncached metadata
2018-07-12 10:49:27 -07:00
dmu_send.c
Fix 'zfs recv' of non large_dnode send streams
2018-06-28 14:55:11 -07:00
dmu_traverse.c
OpenZFS 9166 - zfs storage pool checkpoint
2018-06-26 10:07:42 -07:00
dmu_tx.c
Introduce kstat dmu_tx_dirty_frees_delay
2018-07-25 09:52:27 -07:00
dmu_zfetch.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
dmu.c
Introduce kstat dmu_tx_dirty_frees_delay
2018-07-25 09:52:27 -07:00
dnode_sync.c
Fix OpenZFS 9337 mismerge
2018-08-02 10:21:48 -07:00
dnode.c
Fix OpenZFS 9337 mismerge
2018-08-02 10:21:48 -07:00
dsl_bookmark.c
Undo c89 workarounds to match with upstream
2017-11-04 13:25:13 -07:00
dsl_crypt.c
Add support for decryption faults in zinject
2018-05-02 15:36:20 -07:00
dsl_dataset.c
OpenZFS 9166 - zfs storage pool checkpoint
2018-06-26 10:07:42 -07:00
dsl_deadlist.c
OpenZFS 7614, 9064 - zfs device evacuation/removal
2018-04-14 12:16:17 -07:00
dsl_deleg.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
dsl_destroy.c
OpenZFS 9166 - zfs storage pool checkpoint
2018-06-26 10:07:42 -07:00
dsl_dir.c
OpenZFS 9465 - ARC check for 'anon_size > arc_c/2' can stall the system
2018-07-30 11:30:41 -07:00
dsl_pool.c
OpenZFS 9166 - zfs storage pool checkpoint
2018-06-26 10:07:42 -07:00
dsl_prop.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
dsl_scan.c
dsl_scan_scrub_cb: don't double-account non-embedded blocks
2018-07-24 09:33:56 -07:00
dsl_synctask.c
OpenZFS 9166 - zfs storage pool checkpoint
2018-06-26 10:07:42 -07:00
dsl_userhold.c
OpenZFS 9166 - zfs storage pool checkpoint
2018-06-26 10:07:42 -07:00
edonr_zfs.c
DLPX-44812 integrate EP-220 large memory scalability
2016-11-29 14:34:27 -08:00
fm.c
OpenZFS 9580 - Add a hash-table on top of nvlist to speed-up operations
2018-07-30 11:30:03 -07:00
gzip.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
hkdf.c
Encryption patch follow-up
2017-10-11 16:54:48 -04:00
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
OpenZFS 9166 - zfs storage pool checkpoint
2018-06-26 10:07:42 -07:00
metaslab.c
OpenZFS 9112 - Improve allocation performance on high-end systems
2018-07-31 10:52:33 -07:00
mmp.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
multilist.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
pathname.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
policy.c
Take user namespaces into account in policy checks
2018-03-07 15:40:42 -08:00
qat_compress.c
Fix inst_num overflow in qat_crypt.c
2018-05-01 20:44:24 -07:00
qat_crypt.c
Fix inst_num overflow in qat_crypt.c
2018-05-01 20:44:24 -07:00
qat.c
SHA256 QAT acceleration
2018-03-15 10:53:58 -07:00
qat.h
Resolve QAT issues with incompressible data
2018-03-29 17:40:34 -07:00
range_tree.c
OpenZFS 9166 - zfs storage pool checkpoint
2018-06-26 10:07:42 -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
2018-07-11 13:10:40 -07:00
sha256.c
SHA256 QAT acceleration
2018-03-15 10:53:58 -07:00
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_checkpoint.c
OpenZFS 9238 - ZFS Spacemap Encoding V2
2018-07-05 12:02:34 -07:00
spa_config.c
OpenZFS 9591 - ms_shift can be incorrectly changed
2018-06-21 09:35:26 -07:00
spa_errlog.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
spa_history.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
spa_misc.c
OpenZFS 9112 - Improve allocation performance on high-end systems
2018-07-31 10:52:33 -07:00
spa_stats.c
Add pool state /proc entry, "SUSPENDED" pools
2018-06-06 09:33:54 -07:00
spa.c
OpenZFS 9112 - Improve allocation performance on high-end systems
2018-07-31 10:52:33 -07:00
space_map.c
OpenZFS 9442 - decrease indirect block size of spacemaps
2018-07-25 14:11:35 -07:00
space_reftree.c
OpenZFS 7614, 9064 - zfs device evacuation/removal
2018-04-14 12:16:17 -07:00
THIRDPARTYLICENSE.cityhash
OpenZFS 8484 - Implement aggregate sum and use for arc counters
2018-06-06 09:35:59 -07:00
THIRDPARTYLICENSE.cityhash.descrip
OpenZFS 8484 - Implement aggregate sum and use for arc counters
2018-06-06 09:35:59 -07:00
trace.c
OpenZFS 7614, 9064 - zfs device evacuation/removal
2018-04-14 12:16:17 -07:00
txg.c
OpenZFS 9464 - txg_kick() fails to see that we are quiescing
2018-06-04 14:56:06 -07:00
uberblock.c
OpenZFS 9166 - zfs storage pool checkpoint
2018-06-26 10:07:42 -07:00
unique.c
Performance optimization of AVL tree comparator functions
2016-08-31 14:35:34 -07:00
vdev_cache.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
vdev_disk.c
Add support for autoexpand property
2018-07-23 15:40:15 -07:00
vdev_file.c
OpenZFS 7614, 9064 - zfs device evacuation/removal
2018-04-14 12:16:17 -07:00
vdev_indirect_births.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
vdev_indirect_mapping.c
OpenZFS 9238 - ZFS Spacemap Encoding V2
2018-07-05 12:02:34 -07:00
vdev_indirect.c
OpenZFS 9238 - ZFS Spacemap Encoding V2
2018-07-05 12:02:34 -07:00
vdev_label.c
OpenZFS 9166 - zfs storage pool checkpoint
2018-06-26 10:07:42 -07:00
vdev_mirror.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
vdev_missing.c
OpenZFS 7614, 9064 - zfs device evacuation/removal
2018-04-14 12:16:17 -07:00
vdev_queue.c
OpenZFS 9112 - Improve allocation performance on high-end systems
2018-07-31 10:52:33 -07:00
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
Update build system and packaging
2018-05-29 16:00:33 -07:00
vdev_raidz.c
OpenZFS 7614, 9064 - zfs device evacuation/removal
2018-04-14 12:16:17 -07:00
vdev_removal.c
OpenZFS 9112 - Improve allocation performance on high-end systems
2018-07-31 10:52:33 -07:00
vdev_root.c
OpenZFS 9075 - Improve ZFS pool import/load process and corrupted pool recovery
2018-05-08 21:35:27 -07:00
vdev.c
OpenZFS 9112 - Improve allocation performance on high-end systems
2018-07-31 10:52:33 -07:00
zap_leaf.c
OpenZFS 9328 - zap code can take advantage of c99
2018-05-31 10:53:11 -07:00
zap_micro.c
OpenZFS 9329 - panic in zap_leaf_lookup() due to concurrent zapification
2018-05-31 10:53:49 -07:00
zap.c
OpenZFS 9328 - zap code can take advantage of c99
2018-05-31 10:53:11 -07:00
zcp_get.c
Fix coverity defects: zfs channel programs
2018-02-20 11:19:42 -08:00
zcp_global.c
OpenZFS 8600 - ZFS channel programs - snapshot
2018-02-08 15:29:24 -08:00
zcp_iter.c
OpenZFS 9337 - zfs get all is slow due to uncached metadata
2018-07-12 10:49:27 -07:00
zcp_synctask.c
OpenZFS 9166 - zfs storage pool checkpoint
2018-06-26 10:07:42 -07:00
zcp.c
OpenZFS 9424 - ztest failure: "unprotected error in call to Lua API (Invalid value type 'function' for key 'error')"
2018-07-10 21:29:23 -07:00
zfeature.c
Undo c89 workarounds to match with upstream
2017-11-04 13:25:13 -07:00
zfs_acl.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zfs_byteswap.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zfs_ctldir.c
Fix deadlock between zfs umount & snapentry_expire
2018-08-01 15:00:02 -07:00
zfs_debug.c
enable zfs_dbgmsg() by default, without dprintf()
2018-03-21 15:37:32 -07:00
zfs_dir.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zfs_fm.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zfs_fuid.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zfs_ioctl.c
OpenZFS 8906 - uts: illumos rootfs should support salted cksum
2018-07-27 08:35:28 -07:00
zfs_log.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zfs_onexit.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zfs_ratelimit.c
Change checksum & IO delay ratelimit values
2018-03-04 17:34:51 -08:00
zfs_replay.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zfs_rlock.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zfs_sa.c
Project Quota on ZFS
2018-02-13 14:54:54 -08:00
zfs_vfsops.c
OpenZFS 9337 - zfs get all is slow due to uncached metadata
2018-07-12 10:49:27 -07:00
zfs_vnops.c
Linux 4.18 compat: inode timespec -> timespec64
2018-06-19 21:51:18 -07:00
zfs_znode.c
Linux 4.18 compat: inode timespec -> timespec64
2018-06-19 21:51:18 -07:00
zil.c
OpenZFS 9112 - Improve allocation performance on high-end systems
2018-07-31 10:52:33 -07:00
zio_checksum.c
Undo c89 workarounds to match with upstream
2017-11-04 13:25:13 -07:00
zio_compress.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zio_crypt.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zio_inject.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zio.c
Reduce taskq and context-switch cost of zio pipe
2018-08-02 15:51:45 -07:00
zle.c
Fix zle_decompress out of bound access
2018-02-09 10:08:05 -08:00
zpl_ctldir.c
RHEL 7.5 compat: FMODE_KABI_ITERATE
2018-05-02 15:01:24 -07:00
zpl_export.c
Use cstyle -cpP in make cstyle check
2016-12-12 10:46:26 -08:00
zpl_file.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zpl_inode.c
Linux 4.18 compat: inode timespec -> timespec64
2018-06-19 21:51:18 -07:00
zpl_super.c
Fix zpl_mount() deadlock
2018-07-11 15:49:10 -07:00
zpl_xattr.c
Add missing checks to zpl_xattr_* functions
2018-08-02 14:03:56 -07:00
zrlock.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zthr.c
OpenZFS 9166 - zfs storage pool checkpoint
2018-06-26 10:07:42 -07:00
zvol.c
Linux compat 4.18: check_disk_size_change()
2018-06-15 15:05:21 -07:00