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6aa8c21a2a
mirror_zfs/include/sys
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Alexander Motin 6aa8c21a2a
More speculative prefetcher improvements 
- Make prefetch distance adaptive: up to 4MB prefetch doubles for
every, hit same as before, but after that it grows by 1/8 every time
the prefetch read does not complete in time to satisfy the demand.
My tests show that 4MB is sufficient for wide NVMe pool to saturate
single reader thread at 2.5GB/s, while new 64MB maximum allows the
same thread to reach 1.5GB/s on wide HDD pool.  Further distance
increase may increase speed even more, but less dramatic and with
higher latency.

 - Allow early reuse of inactive prefetch streams: streams that never
saw hits can be reused immediately if there is a demand, while others
can be reused after 1s of inactivity, starting with the oldest.  After
2s of inactivity streams are deleted to free resources same as before.
This allows by several times increase strided read performance on HDD
pool in presence of simultaneous random reads, previously filling the
zfetch_max_streams limit for seconds and so blocking most of prefetch.

 - Always issue intermediate indirect block reads with SYNC priority.
Each of those reads if delayed for longer may delay up to 1024 other
block prefetches, that may be not good for wide pools.

Reviewed-by: Allan Jude <allan@klarasystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored-By: iXsystems, Inc.
Closes #13452
2022-05-25 10:12:52 -07:00
..
crypto autoconf: single-step includes 2022-05-10 10:18:51 -07:00
fm autoconf: single-step includes 2022-05-10 10:18:51 -07:00
fs linux: libzfs: simplify module-loaded check 2022-05-18 12:51:42 -07:00
lua autoconf: single-step includes 2022-05-10 10:18:51 -07:00
sysevent autoconf: single-step includes 2022-05-10 10:18:51 -07:00
zstd Unbreak zstd build on sparc64 2022-05-25 09:18:49 -07:00
abd_impl.h Avoid small buffer copying on write 2021-07-27 16:05:47 -07:00
abd.h Avoid small buffer copying on write 2021-07-27 16:05:47 -07:00
aggsum.h More aggsum optimizations 2021-06-07 09:02:47 -07:00
arc_impl.h Replace *CTASSERT() with _Static_assert() 2022-01-26 11:38:52 -08:00
arc.h include: sys/arc.h: shim out arc_referenced() 2021-12-23 09:36:26 -08:00
avl_impl.h Remove avl_size field from struct avl_tree 2021-07-01 09:32:31 -06:00
avl.h lib{efi,avl,share,tpool,zfs_core,zfsbootenv,zutil}: -fvisibility=hidden 2021-06-09 17:04:32 -07:00
bitops.h Remove NOTE(CONSTCOND) and note.h 2021-07-26 12:07:53 -07:00
blkptr.h OpenZFS 8067 - zdb should be able to dump literal embedded block pointer 2017-07-07 11:28:01 -07:00
bplist.h Fast Clone Deletion 2019-07-26 10:54:14 -07:00
bpobj.h Fast Clone Deletion 2019-07-26 10:54:14 -07:00
bptree.h
bqueue.h Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
btree.h Fix typos 2020-06-09 21:24:09 -07:00
dataset_kstats.h Introduce write-mostly sums 2021-05-27 14:27:29 -06:00
dbuf.h More speculative prefetcher improvements 2022-05-25 10:12:52 -07:00
ddt.h Appease GCC sprintf warnings found on Fedora 32/GCC 10.0.1 2020-08-24 10:32:59 -07:00
dmu_impl.h Remove UIO_ZEROCOPY functions structures 2020-10-30 10:00:33 -07:00
dmu_objset.h Introduce a tunable to exclude special class buffers from L2ARC 2021-11-11 12:52:16 -08:00
dmu_recv.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
dmu_redact.h Suppress cppcheck invalidSyntax warninigs 2021-03-05 17:56:35 -08:00
dmu_send.h Removed duplicated includes 2021-03-22 12:34:58 -07:00
dmu_traverse.h Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
dmu_tx.h Refactor Log Size Limit 2022-05-24 09:46:35 -07:00
dmu_zfetch.h More speculative prefetcher improvements 2022-05-25 10:12:52 -07:00
dmu.h Improve log spacemap load time 2022-04-26 10:44:21 -07:00
dnode.h Fix lseek(SEEK_DATA/SEEK_HOLE) mmap consistency 2021-11-07 14:27:44 -07:00
dsl_bookmark.h Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
dsl_crypt.h dmu_objset_from_ds must be called with dp_config_rwlock held 2020-03-12 10:55:02 -07:00
dsl_dataset.h Improve zpool status output, list all affected datasets 2022-04-25 17:25:42 -07:00
dsl_deadlist.h Add fast path for zfs_ioc_space_snaps() handling of empty_bpobj 2019-08-20 11:34:52 -07:00
dsl_deleg.h Remove code for zfs remap 2019-06-24 16:44:01 -07:00
dsl_destroy.h Fast Clone Deletion 2019-07-26 10:54:14 -07:00
dsl_dir.h Remove NOTE(CONSTCOND) and note.h 2021-07-26 12:07:53 -07:00
dsl_pool.h Refactor Log Size Limit 2022-05-24 09:46:35 -07:00
dsl_prop.h Support inheriting properties in channel programs 2020-01-22 17:03:17 -08:00
dsl_scan.h Use dsl_scan_setup_check() to setup a scrub 2021-04-08 14:33:15 -07:00
dsl_synctask.h Add upper bound for slop space calculation 2021-02-24 09:52:43 -08:00
dsl_userhold.h
edonr.h
efi_partition.h Integrate carcass of libspl/i/s/vtoc.h into i/s/efi_partition.h 2022-03-15 15:13:54 -07:00
frame.h Linux 5.10 compat: frame.h renamed objtool.h 2020-11-02 22:01:10 +00:00
hkdf.h Encryption patch follow-up 2017-10-11 16:54:48 -04:00
metaslab_impl.h Improve log spacemap load time 2022-04-26 10:44:21 -07:00
metaslab.h Improve log spacemap load time 2022-04-26 10:44:21 -07:00
mmp.h Add zfs_multihost_interval tunable handler for FreeBSD 2020-06-23 13:32:42 -07:00
mntent.h Add FreeBSD required defines to mntent.h 2019-11-30 15:49:09 -08:00
mod.h linux: module: weld all but spl.ko into zfs.ko 2022-04-20 13:28:24 -07:00
multilist.h Re-embed multilist_t storage 2021-06-10 10:42:31 -06:00
nvpair_impl.h Add const to nvlist functions to properly expose their real behavior 2021-12-06 18:19:13 -07:00
nvpair.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
objlist.h Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
pathname.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
qat.h include: qat.h: mark unused macro arguments as used 2021-12-23 09:36:21 -08:00
range_tree.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
rrwlock.h Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
sa_impl.h Rename refcount.h to zfs_refcount.h 2020-07-29 16:35:33 -07:00
sa.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
skein.h
spa_boot.h
spa_checkpoint.h Serialize ZTHR operations to eliminate races 2019-01-13 10:09:46 -08:00
spa_checksum.h
spa_impl.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
spa_log_spacemap.h Improve log spacemap load time 2022-04-26 10:44:21 -07:00
spa.h Expose zpool guids through kstats 2022-05-18 10:25:33 -07:00
space_map.h Extend zdb to print inconsistencies in livelists and metaslabs 2020-07-14 17:51:05 -07:00
space_reftree.h Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
sysevent.h OpenZFS 6939 - add sysevents to zfs core for commands 2017-07-12 21:28:13 -07:00
txg_impl.h Fix typos in include/ 2019-08-30 09:53:15 -07:00
txg.h Optimize txg_kick() process (#12274) 2021-07-01 09:20:27 -06:00
u8_textprep_data.h
u8_textprep.h Throw const on some strings 2020-10-02 17:44:10 -07:00
uberblock_impl.h MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
uberblock.h Multi-modifier protection (MMP) 2017-07-13 13:54:00 -04:00
uio_impl.h Cleaning up uio headers 2021-02-20 20:16:50 -08:00
unique.h
uuid.h
vdev_disk.h Make struct vdev_disk_t be platform private 2020-06-16 11:43:33 -07:00
vdev_draid.h Verify dRAID empty sectors 2022-01-04 16:46:32 -08:00
vdev_file.h Add zfs_file_* interface, remove vnodes 2019-11-21 09:32:57 -08:00
vdev_impl.h Replace *CTASSERT() with _Static_assert() 2022-01-26 11:38:52 -08:00
vdev_indirect_births.h OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
vdev_indirect_mapping.h OpenZFS 7614, 9064 - zfs device evacuation/removal 2018-04-14 12:16:17 -07:00
vdev_initialize.h Add TRIM support 2019-03-29 09:13:20 -07:00
vdev_raidz_impl.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
vdev_raidz.h Verify dRAID empty sectors 2022-01-04 16:46:32 -08:00
vdev_rebuild.h Fix various typos 2021-04-02 18:52:15 -07:00
vdev_removal.h panic in removal_remap test on 4K devices 2019-06-13 13:12:39 -07:00
vdev_trim.h Trim L2ARC 2020-06-09 10:15:08 -07:00
vdev.h Vdev Properties Feature 2021-11-30 07:46:25 -07:00
xvattr.h Forbid b{copy,zero,cmp}(). Don't include <strings.h> for <string.h> 2022-03-15 15:13:48 -07:00
zap_impl.h
zap_leaf.h Fix ENOSPC in "Handle zap_add() failures in ..." 2018-04-18 14:19:50 -07:00
zap.h fat zap should prefetch when iterating 2019-06-12 13:13:09 -07:00
zcp_global.h OpenZFS 7431 - ZFS Channel Programs 2018-02-08 15:28:18 -08:00
zcp_iter.h OpenZFS 7431 - ZFS Channel Programs 2018-02-08 15:28:18 -08:00
zcp_prop.h OpenZFS 7431 - ZFS Channel Programs 2018-02-08 15:28:18 -08:00
zcp_set.h Support setting user properties in a channel program 2020-02-14 13:41:42 -08:00
zcp.h filesystem_limit/snapshot_limit is incorrectly enforced against root 2020-07-11 17:18:02 -07:00
zfeature.h
zfs_acl.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zfs_bootenv.h zfs label bootenv should store data as nvlist 2020-09-15 15:42:27 -07:00
zfs_context.h Remove hw_serial, ddi_strtoul() 2022-05-13 10:15:31 -07:00
zfs_debug.h Annotated dprintf as printf-like 2021-06-22 21:53:45 -07:00
zfs_delay.h Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_file.h file reference counts can get corrupted 2021-07-10 19:00:37 -06:00
zfs_fuid.h Replace sprintf()->snprintf() and strcpy()->strlcpy() 2020-06-07 11:42:12 -07:00
zfs_ioctl_impl.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zfs_ioctl.h file reference counts can get corrupted 2021-07-10 19:00:37 -06:00
zfs_onexit.h file reference counts can get corrupted 2021-07-10 19:00:37 -06:00
zfs_project.h Minor diff reduction with ZoF in include/sys 2019-11-27 11:11:03 -08:00
zfs_quota.h File incorrectly zeroed when receiving incremental stream that toggles -L 2020-06-09 10:41:01 -07:00
zfs_racct.h Restore FreeBSD resource usage accounting 2021-02-19 22:34:33 -08:00
zfs_ratelimit.h Change checksum & IO delay ratelimit values 2018-03-04 17:34:51 -08:00
zfs_refcount.h Correct refcount_add in dmu_zfetch 2021-10-08 11:10:34 -07:00
zfs_rlock.h Add a "try" operation for range locks 2020-07-06 11:53:31 -07:00
zfs_sa.h log xattr=sa create/remove/update to ZIL 2022-02-22 13:06:43 -08:00
zfs_stat.h
zfs_sysfs.h zcommon: pre-iterate over sysfs instead of statting every feature 2021-12-16 16:43:10 -08:00
zfs_vfsops.h Add 'zfs rename -u' to rename without remounting 2020-09-01 16:14:16 -07:00
zfs_vnops.h Extending FreeBSD UIO Struct 2021-01-20 21:27:30 -08:00
zfs_znode.h Speed up WB_SYNC_NONE when a WB_SYNC_ALL occurs simultaneously 2022-05-03 13:23:26 -07:00
zil_impl.h make zil max block size tunable 2019-06-10 11:48:42 -07:00
zil.h log xattr=sa create/remove/update to ZIL 2022-02-22 13:06:43 -08:00
zio_checksum.h libzfs: convert to -fvisibility=hidden 2021-06-03 13:17:55 -07:00
zio_compress.h Add zstd support to zfs 2020-08-20 10:30:06 -07:00
zio_crypt.h module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zio_impl.h Add zstd support to zfs 2020-08-20 10:30:06 -07:00
zio_priority.h Add device rebuild feature 2020-07-03 11:05:50 -07:00
zio.h Improve zpool status output, list all affected datasets 2022-04-25 17:25:42 -07:00
zrlock.h
zthr.h Avoid memory allocations in the ARC eviction thread 2022-01-21 10:28:13 -08:00
zvol_impl.h zvol: make calls to platform ops static 2022-02-07 10:24:38 -08:00
zvol.h Remove unused function zvol_set_volblocksize() 2021-10-26 17:07:53 -07:00