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Tony Nguyen 8d04284281 Use smaller default slack/delta value for schedule_hrtimeout_range() 
For interrupt coalescing, cv_timedwait_hires() uses a 100us slack/delta
for calls to schedule_hrtimeout_range(). This 100us slack can be costly
for small writes.

This change improves small write performance by passing resolution `res`
parameter to schedule_hrtimeout_range() to be used as delta/slack. A new
tunable `spl_schedule_hrtimeout_slack_us` is added to preserve old
behavior when desired.

Performance observations on 8K recordsize filesystem:
- 8K random writes at 1-64 threads, up to 60% improvement for one thread
  and smaller gains as thread count increases. At >64 threads, 2-5%
  decrease in performance was observed.
- 8K sequential writes, similar 60% improvement for one thread and
  leveling out around 64 threads. At >64 threads, 5-10% decrease in
  performance was observed.
- 128K sequential write sees 1-5 for the 128K. No observed regression at
  high thread count.

Testing done on Ubuntu 18.04 with 4.15 kernel, 8vCPUs and SSD storage on
VMware ESX.

Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Matt Ahrens <mahrens@delphix.com>
Signed-off-by: Tony Nguyen <tony.nguyen@delphix.com>
Closes #9217
2019-08-28 14:56:54 -07:00
..
abd.c
Tag ABD pages for exclusion in kernel crash dumps
2019-08-28 10:44:46 -07:00
aggsum.c
OpenZFS 9688 - aggsum_fini leaks memory
2018-10-19 12:08:03 -07:00
arc.c
Cap metaslab memory usage
2019-08-16 09:08:21 -06:00
blkptr.c
…
bplist.c
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
bpobj.c
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
bptree.c
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
bqueue.c
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
cityhash.c
OpenZFS 8484 - Implement aggregate sum and use for arc counters
2018-06-06 09:35:59 -07:00
dataset_kstats.c
port async unlinked drain from illumos-nexenta
2019-02-12 10:41:15 -08:00
dbuf_stats.c
Prefix all refcount functions with zfs_
2018-10-01 10:42:05 -07:00
dbuf.c
dmu_tx_wait() hang likely due to cv_signal() in dsl_pool_dirty_delta()
2019-08-15 17:53:53 -06:00
ddt_zap.c
fat zap should prefetch when iterating
2019-06-12 13:13:09 -07:00
ddt.c
Remove dedupditto functionality
2019-06-19 14:54:02 -07:00
dmu_diff.c
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
dmu_object.c
Fix send/recv lost spill block
2019-05-07 15:18:44 -07:00
dmu_objset.c
dmu_tx_wait() hang likely due to cv_signal() in dsl_pool_dirty_delta()
2019-08-15 17:53:53 -06:00
dmu_recv.c
Allow unencrypted children of encrypted datasets
2019-06-20 12:29:51 -07:00
dmu_redact.c
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
dmu_send.c
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
dmu_traverse.c
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
dmu_tx.c
Improve performance by using dmu_tx_hold_*_by_dnode()
2019-07-30 09:18:30 -07:00
dmu_zfetch.c
Replace zf_rwlock with a mutex
2019-07-25 11:57:58 -07:00
dmu.c
dmu_tx_wait() hang likely due to cv_signal() in dsl_pool_dirty_delta()
2019-08-15 17:53:53 -06:00
dnode_sync.c
Decrease contention on dn_struct_rwlock
2019-07-08 13:18:50 -07:00
dnode.c
Fix zil replay panic when TX_REMOVE followed by TX_CREATE
2019-08-28 10:42:02 -07:00
dsl_bookmark.c
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
dsl_crypt.c
Remove VERIFY from dsl_dataset_crypt_stats()
2019-07-05 16:53:14 -07:00
dsl_dataset.c
Mark dsl_livelist_should_disable() static
2019-08-13 21:16:23 -06:00
dsl_deadlist.c
Add fast path for zfs_ioc_space_snaps() handling of empty_bpobj
2019-08-20 11:34:52 -07:00
dsl_deleg.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
dsl_destroy.c
Add fast path for zfs_ioc_space_snaps() handling of empty_bpobj
2019-08-20 11:34:52 -07:00
dsl_dir.c
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
dsl_pool.c
dmu_tx_wait() hang likely due to cv_signal() in dsl_pool_dirty_delta()
2019-08-15 17:53:53 -06:00
dsl_prop.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
dsl_scan.c
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
dsl_synctask.c
OpenZFS 9425 - channel programs can be interrupted
2019-06-22 16:51:46 -07:00
dsl_userhold.c
zfs should optionally send holds
2019-02-15 12:41:38 -08:00
edonr_zfs.c
…
fm.c
Don't wakeup unnecessarily in 'zpool events -f'
2019-08-05 11:35:47 -07:00
gzip.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
hkdf.c
…
lz4.c
Reword comment in lz4_compress_zfs
2019-05-02 16:46:04 -07:00
lzjb.c
…
Makefile.in
Log Spacemap Project
2019-07-16 10:11:49 -07:00
metaslab.c
Cap metaslab memory usage
2019-08-16 09:08:21 -06:00
mmp.c
Use smaller default slack/delta value for schedule_hrtimeout_range()
2019-08-28 14:56:54 -07:00
multilist.c
Avoid extra taskq_dispatch() calls by DMU
2019-06-25 12:03:38 -07:00
objlist.c
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
pathname.c
Disable unused pathname::pn_path* (unneeded in Linux)
2019-07-15 13:57:56 -07:00
policy.c
Implement secpolicy_vnode_setid_retain()
2019-07-26 13:52:30 -07:00
qat_compress.c
Code improvement and bug fixes for QAT support
2019-04-16 12:38:36 -07:00
qat_crypt.c
Code improvement and bug fixes for QAT support
2019-04-16 12:38:36 -07:00
qat.c
Code improvement and bug fixes for QAT support
2019-04-16 12:38:36 -07:00
qat.h
Code improvement and bug fixes for QAT support
2019-04-16 12:38:36 -07:00
range_tree.c
Metaslab max_size should be persisted while unloaded
2019-08-05 14:34:27 -07:00
refcount.c
Prevent race in blkptr_verify against device removal
2019-08-13 21:24:43 -06:00
rrwlock.c
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
sa.c
Fix lockdep circular locking false positive involving sa_lock
2019-08-19 16:04:26 -07:00
sha256.c
SHA256 QAT acceleration
2018-03-15 10:53:58 -07:00
skein_zfs.c
…
spa_boot.c
…
spa_checkpoint.c
Get rid of space_map_update() for ms_synced_length
2019-02-12 10:38:11 -08:00
spa_config.c
Remove vn_set_fs_pwd()/vn_set_pwd() (no need to be at / during insmod)
2019-05-29 16:18:14 -07:00
spa_errlog.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
spa_history.c
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
spa_log_spacemap.c
Cap metaslab memory usage
2019-08-16 09:08:21 -06:00
spa_misc.c
Prevent race in blkptr_verify against device removal
2019-08-13 21:24:43 -06:00
spa_stats.c
Restrict kstats and print real pointers
2019-04-04 18:57:06 -07:00
spa.c
Cap metaslab memory usage
2019-08-16 09:08:21 -06:00
space_map.c
Log Spacemap Project
2019-07-16 10:11:49 -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
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
txg.c
Log Spacemap Project
2019-07-16 10:11:49 -07:00
uberblock.c
MMP interval and fail_intervals in uberblock
2019-03-21 12:47:57 -07:00
unique.c
…
vdev_cache.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
vdev_disk.c
Revert "Fail early on bio corruption confirmed on 5.2-rc1"
2019-07-05 20:38:56 -07:00
vdev_file.c
Update vdev_ops_t from illumos
2019-06-20 18:29:02 -07:00
vdev_indirect_births.c
Fixes: #8934 Large kmem_alloc
2019-07-10 15:54:49 -07:00
vdev_indirect_mapping.c
Get rid of space_map_update() for ms_synced_length
2019-02-12 10:38:11 -08:00
vdev_indirect.c
Log Spacemap Project
2019-07-16 10:11:49 -07:00
vdev_initialize.c
Cap metaslab memory usage
2019-08-16 09:08:21 -06:00
vdev_label.c
panic in removal_remap test on 4K devices
2019-06-13 13:12:39 -07:00
vdev_mirror.c
Update vdev_ops_t from illumos
2019-06-20 18:29:02 -07:00
vdev_missing.c
Update vdev_ops_t from illumos
2019-06-20 18:29:02 -07:00
vdev_queue.c
Move write aggregation memory copy out of vq_lock
2019-06-13 13:08:24 -07:00
vdev_raidz_math_aarch64_neon_common.h
Linux 5.0 compat: ASM_BUG macro
2019-05-08 10:18:40 -07:00
vdev_raidz_math_aarch64_neon.c
Linux 5.0 compat: SIMD compatibility
2019-07-12 09:31:20 -07:00
vdev_raidz_math_aarch64_neonx2.c
Linux 5.0 compat: SIMD compatibility
2019-07-12 09:31:20 -07:00
vdev_raidz_math_avx2.c
Linux 5.0 compat: SIMD compatibility
2019-07-12 09:31:20 -07:00
vdev_raidz_math_avx512bw.c
Linux 5.0 compat: SIMD compatibility
2019-07-12 09:31:20 -07:00
vdev_raidz_math_avx512f.c
Linux 5.0 compat: SIMD compatibility
2019-07-12 09:31:20 -07:00
vdev_raidz_math_impl.h
…
vdev_raidz_math_scalar.c
Linux 5.3: Fix switch() fall though compiler errors
2019-08-21 09:29:23 -07:00
vdev_raidz_math_sse2.c
Linux 5.0 compat: SIMD compatibility
2019-07-12 09:31:20 -07:00
vdev_raidz_math_ssse3.c
Linux 5.0 compat: SIMD compatibility
2019-07-12 09:31:20 -07:00
vdev_raidz_math.c
Linux 5.0 compat: SIMD compatibility
2019-07-12 09:31:20 -07:00
vdev_raidz.c
Update vdev_ops_t from illumos
2019-06-20 18:29:02 -07:00
vdev_removal.c
Log Spacemap Project
2019-07-16 10:11:49 -07:00
vdev_root.c
Update vdev_ops_t from illumos
2019-06-20 18:29:02 -07:00
vdev_trim.c
Cap metaslab memory usage
2019-08-16 09:08:21 -06:00
vdev.c
Cap metaslab memory usage
2019-08-16 09:08:21 -06:00
zap_leaf.c
Off-by-one in zap_leaf_array_create()
2019-01-18 09:58:46 -08:00
zap_micro.c
fat zap should prefetch when iterating
2019-06-12 13:13:09 -07:00
zap.c
fat zap should prefetch when iterating
2019-06-12 13:13:09 -07:00
zcp_get.c
Fix get_special_prop() build failure
2019-07-16 14:14:12 -07:00
zcp_global.c
OpenZFS 8600 - ZFS channel programs - snapshot
2018-02-08 15:29:24 -08:00
zcp_iter.c
Introduce getting holds and listing bookmarks through ZCP
2019-08-12 10:02:34 -07:00
zcp_synctask.c
OpenZFS 9166 - zfs storage pool checkpoint
2018-06-26 10:07:42 -07:00
zcp.c
OpenZFS 9425 - channel programs can be interrupted
2019-06-22 16:51:46 -07:00
zfeature.c
Consistently captialize GUID for features
2019-04-16 10:01:51 -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
Change boolean-like uint8_t fields in znode_t to boolean_t
2019-08-13 07:58:02 -06:00
zfs_debug.c
Restrict kstats and print real pointers
2019-04-04 18:57:06 -07:00
zfs_dir.c
port async unlinked drain from illumos-nexenta
2019-02-12 10:41:15 -08:00
zfs_fm.c
Add zpool status -s (slow I/Os) and -p (parseable)
2018-11-08 16:47:24 -08:00
zfs_fuid.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zfs_ioctl.c
zfs_ioc_snapshot: check user-prop permissions on snapshotted datasets
2019-08-27 13:45:53 -07:00
zfs_log.c
Improve write performance by using dmu_read_by_dnode()
2019-08-15 17:36:24 -06:00
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
Fix zil replay panic when TX_REMOVE followed by TX_CREATE
2019-08-28 10:42:02 -07:00
zfs_rlock.c
OpenZFS 9689 - zfs range lock code should not be zpl-specific
2018-10-11 10:19:33 -07:00
zfs_sa.c
Project Quota on ZFS
2018-02-13 14:54:54 -08:00
zfs_sysfs.c
Prevent pointer to an out-of-scope local variable
2019-06-20 18:31:52 -07:00
zfs_vfsops.c
Fix deadlock in 'zfs rollback'
2019-08-27 09:55:51 -07:00
zfs_vnops.c
Fix out-of-order ZIL txtype lost on hardlinked files
2019-08-13 21:21:27 -06:00
zfs_znode.c
Fix deadlock in 'zfs rollback'
2019-08-27 09:55:51 -07:00
zil.c
Fix out-of-order ZIL txtype lost on hardlinked files
2019-08-13 21:21:27 -06:00
zio_checksum.c
…
zio_compress.c
OpenZFS 9403 - assertion failed in arc_buf_destroy()
2018-08-29 11:33:33 -07:00
zio_crypt.c
Always call rw_init in zio_crypt_key_unwrap
2019-04-10 15:39:40 -07:00
zio_inject.c
Multiple DVA Scrubbing Fix
2019-03-15 14:14:31 -07:00
zio.c
Prevent race in blkptr_verify against device removal
2019-08-13 21:24:43 -06:00
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
…
zpl_file.c
Fix errant EFAULT during writes (#8719)
2019-05-08 10:04:04 -07:00
zpl_inode.c
Fix errant EFAULT during writes (#8719)
2019-05-08 10:04:04 -07:00
zpl_super.c
Fix statfs(2) for 32-bit user space
2018-09-24 17:11:25 -07:00
zpl_xattr.c
Drop redundant POSIX ACL check in zpl_init_acl()
2019-07-15 16:26:52 -07:00
zrlock.c
Update build system and packaging
2018-05-29 16:00:33 -07:00
zthr.c
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
zvol.c
Add SCSI_PASSTHROUGH to zvols to enable UNMAP support
2019-06-21 09:40:56 -07:00