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Alexander Motin e0ce98d57c
Reduce number of atomic_add() calls in aggsum 
Previous code used 4 atomics to do aggsum_flush_bucket() and 2 more to
re-borrow after the flush.  But since asc_borrowed and asc_delta are
accessed only while holding asc_lock, it makes no any sense to modify
as_lower_bound and as_upper_bound in multiple steps.  Instead of that
the new code uses only 2 atomics in all the cases, one per as_*_bound
variable.  I think even that is overkill, simple atomic store and
load could be used here, since all modifications are done under the
as_lock, but there are no such primitives in ZFS code now.

While there, make borrow code consider previous borrow value, so that
on mixed request patterns reduce chance of needing to borrow again if
much larger request follows tiny one that needed borrow.

Also reduce as_numbuckets from uint64_t to u_int.  It makes no sense
to use so large division operation on every aggsum_add().

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Paul Dagnelie <pcd@delphix.com>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored-By: iXsystems, Inc.
Closes #9930
 		2020-02-06 13:21:06 -08:00
..
crypto Add support for selecting encryption backend 2018-08-02 11:59:24 -07:00
fm Add zpool status -s (slow I/Os) and -p (parseable) 2018-11-08 16:47:24 -08:00
fs Restore aclmode and remove acltype on FreeBSD 2020-02-04 08:40:07 -08:00
lua Fix typos in include/ 2019-08-30 09:53:15 -07:00
sysevent Add TRIM support 2019-03-29 09:13:20 -07:00
Makefile.am Relocate common quota functions to shared code 2019-12-11 12:12:08 -08:00
abd.h Minor diff reduction with ZoF in include/sys 2019-11-27 11:11:03 -08:00
aggsum.h Reduce number of atomic_add() calls in aggsum 2020-02-06 13:21:06 -08:00
arc.h Fix typos in include/ 2019-08-30 09:53:15 -07:00
arc_impl.h Fix for ARC sysctls ignored at runtime 2019-10-26 15:22:19 -07:00
avl.h Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
avl_impl.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
bitops.h Reduce loaded range tree memory usage 2019-10-09 10:36:03 -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 Illumos 4914 - zfs on-disk bookmark structure should be named *_phys_t 2014-08-06 14:48:41 -07:00
bqueue.h Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
btree.h Function name and comment updates 2019-10-11 10:13:21 -07:00
cityhash.h OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
dataset_kstats.h port async unlinked drain from illumos-nexenta 2019-02-12 10:41:15 -08:00
dbuf.h Few microoptimizations to dbuf layer 2020-02-05 11:08:44 -08:00
ddt.h Remove dedupditto functionality 2019-06-19 14:54:02 -07:00
dmu.h Minor diff reduction with ZoF in include/sys 2019-11-27 11:11:03 -08:00
dmu_impl.h Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
dmu_objset.h Fast Clone Deletion 2019-07-26 10:54:14 -07:00
dmu_recv.h Fix errata #4 handling for resuming streams 2020-01-14 12:25:20 -08:00
dmu_redact.h Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
dmu_send.h Add 'zfs send --saved' flag 2020-01-10 10:16:58 -08:00
dmu_traverse.h Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
dmu_tx.h Linux 4.19-rc3+ compat: Remove refcount_t compat 2018-09-26 10:29:26 -07:00
dmu_zfetch.h Replace zf_rwlock with a mutex 2019-07-25 11:57:58 -07:00
dnode.h Fix zil replay panic when TX_REMOVE followed by TX_CREATE 2019-08-28 10:42:02 -07:00
dsl_bookmark.h Fix comments on zfs_bookmark_phys 2019-06-22 16:32:26 -07:00
dsl_crypt.h Allow unencrypted children of encrypted datasets 2019-06-20 12:29:51 -07:00
dsl_dataset.h Implement Redacted Send/Receive 2019-06-19 09:48:12 -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 Fast Clone Deletion 2019-07-26 10:54:14 -07:00
dsl_pool.h Eliminate Linux specific inode usage from common code 2019-12-11 11:53:57 -08:00
dsl_prop.h Support inheriting properties in channel programs 2020-01-22 17:03:17 -08:00
dsl_scan.h Prevent unnecessary resilver restarts 2019-11-27 10:15:01 -08:00
dsl_synctask.h OpenZFS 9425 - channel programs can be interrupted 2019-06-22 16:51:46 -07:00
dsl_userhold.h Illumos #3740 2013-11-04 11:17:48 -08:00
edonr.h OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R 2016-10-03 14:51:15 -07:00
efi_partition.h Fix typos in include/ 2019-08-30 09:53:15 -07:00
frame.h Suppress incorrect objtool warnings 2017-12-07 10:28:50 -08:00
hkdf.h Encryption patch follow-up 2017-10-11 16:54:48 -04:00
metaslab.h Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
metaslab_impl.h Reduce loaded range tree memory usage 2019-10-09 10:36:03 -07:00
mmp.h MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
mntent.h Add FreeBSD required defines to mntent.h 2019-11-30 15:49:09 -08:00
mod.h Wrap Linux module macros 2019-11-01 10:41:03 -07:00
multilist.h Avoid extra taskq_dispatch() calls by DMU 2019-06-25 12:03:38 -07:00
note.h Update build system and packaging 2018-05-29 16:00:33 -07:00
nvpair.h Add new fnvlist_lookup_* functions 2018-10-03 15:30:55 -07:00
nvpair_impl.h OpenZFS 9580 - Add a hash-table on top of nvlist to speed-up operations 2018-07-30 11:30:03 -07:00
objlist.h Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
pathname.h Disable unused pathname::pn_path* (unneeded in Linux) 2019-07-15 13:57:56 -07:00
qat.h QAT related bug fixes 2019-09-12 13:33:44 -07:00
range_tree.h Don't cast away const 2019-10-31 10:38:03 -07:00
refcount.h Prevent race in blkptr_verify against device removal 2019-08-13 21:24:43 -06:00
rrwlock.h OpenZFS restructuring - zfs_ioctl 2019-09-27 10:46:28 -07:00
sa.h Fix typos in include/ 2019-08-30 09:53:15 -07:00
sa_impl.h Linux 4.19-rc3+ compat: Remove refcount_t compat 2018-09-26 10:29:26 -07:00
skein.h OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R 2016-10-03 14:51:15 -07:00
spa.h Refactor deadman set failmode to be cross platform 2019-12-05 12:40:45 -08:00
spa_boot.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
spa_checkpoint.h Serialize ZTHR operations to eliminate races 2019-01-13 10:09:46 -08:00
spa_checksum.h Implementation of AVX2 optimized Fletcher-4 2016-06-02 14:30:51 -07:00
spa_impl.h Refactor deadman set failmode to be cross platform 2019-12-05 12:40:45 -08:00
spa_log_spacemap.h Log Spacemap Project 2019-07-16 10:11:49 -07:00
space_map.h Log Spacemap Project 2019-07-16 10:11:49 -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.h OpenZFS 9425 - channel programs can be interrupted 2019-06-22 16:51:46 -07:00
txg_impl.h Fix typos in include/ 2019-08-30 09:53:15 -07:00
u8_textprep.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
u8_textprep_data.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
uberblock.h Multi-modifier protection (MMP) 2017-07-13 13:54:00 -04:00
uberblock_impl.h MMP interval and fail_intervals in uberblock 2019-03-21 12:47:57 -07:00
uio_impl.h deadlock between mm_sem and tx assign in zfs_write() and page fault 2018-10-16 11:11:24 -07:00
unique.h Illumos #3742 2013-11-04 10:55:25 -08:00
uuid.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
vdev.h Prevent unnecessary resilver restarts 2019-11-27 10:15:01 -08:00
vdev_disk.h Add support for autoexpand property 2018-07-23 15:40:15 -07:00
vdev_file.h Add zfs_file_* interface, remove vnodes 2019-11-21 09:32:57 -08:00
vdev_impl.h Add zfs_file_* interface, remove vnodes 2019-11-21 09:32:57 -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.h Linux 5.0 compat: SIMD compatibility 2019-07-12 09:31:20 -07:00
vdev_raidz_impl.h Add AltiVec RAID-Z 2020-01-23 11:01:24 -08:00
vdev_removal.h panic in removal_remap test on 4K devices 2019-06-13 13:12:39 -07:00
vdev_trim.h Add TRIM support 2019-03-29 09:13:20 -07:00
xvattr.h Linux 4.18 compat: inode timespec -> timespec64 2018-06-19 21:51:18 -07:00
zap.h fat zap should prefetch when iterating 2019-06-12 13:13:09 -07:00
zap_impl.h OpenZFS 7793 - ztest fails assertion in dmu_tx_willuse_space 2017-03-07 09:51:59 -08:00
zap_leaf.h Fix ENOSPC in "Handle zap_add() failures in ..." 2018-04-18 14:19:50 -07:00
zcp.h async zvol minor node creation interferes with receive 2020-02-03 09:33:14 -08:00
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
zfeature.h Revert "zhack: Add 'feature disable' command" 2016-05-17 11:52:07 -07:00
zfs_acl.h Return an error code from zfs_acl_chmod_setattr 2019-11-01 10:19:11 -07:00
zfs_context.h Refactor zfs_context.h to build on FreeBSD 2019-12-04 13:12:57 -08:00
zfs_debug.h Remove sdt.h 2019-10-25 13:38:37 -07:00
zfs_delay.h Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs_file.h Add zfs_file_* interface, remove vnodes 2019-11-21 09:32:57 -08:00
zfs_fuid.h Relocate common quota functions to shared code 2019-12-11 12:12:08 -08:00
zfs_ioctl.h Resolve ZoF differences in zfs_ioctl.h 2019-11-30 15:35:54 -08:00
zfs_ioctl_impl.h Abstract away platform specific superblock references 2019-12-10 09:21:07 -08:00
zfs_onexit.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zfs_project.h Minor diff reduction with ZoF in include/sys 2019-11-27 11:11:03 -08:00
zfs_quota.h Relocate common quota functions to shared code 2019-12-11 12:12:08 -08:00
zfs_ratelimit.h Change checksum & IO delay ratelimit values 2018-03-04 17:34:51 -08:00
zfs_rlock.h Prefix struct rangelock 2019-11-01 10:37:33 -07:00
zfs_sa.h Project Quota on ZFS 2018-02-13 14:54:54 -08:00
zfs_stat.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
zfs_sysfs.h Fix in-kernel sysfs entries 2018-09-06 21:44:52 -07:00
zfs_znode.h Move platform specific parts of zfs_znode.h to platform code 2019-11-06 10:54:25 -08:00
zil.h Add zfs_file_* interface, remove vnodes 2019-11-21 09:32:57 -08:00
zil_impl.h make zil max block size tunable 2019-06-10 11:48:42 -07:00
zio.h Exclude data from cores unconditionally and metadata conditionally 2019-12-09 12:29:56 -08:00
zio_checksum.h Remove dependency on linear ABD 2017-03-29 12:24:51 -07:00
zio_compress.h lz4_decompress_abd declared but not defined 2019-06-13 13:14:34 -07:00
zio_crypt.h Add FreeBSD support to zio_crypto.h 2019-11-30 15:38:16 -08:00
zio_impl.h Fix typos in include/ 2019-08-30 09:53:15 -07:00
zio_priority.h Add TRIM support 2019-03-29 09:13:20 -07:00
zrlock.h OpenZFS 6328 - Fix cstyle errors in zfs codebase 2017-01-12 09:42:11 -08:00
zthr.h Fast Clone Deletion 2019-07-26 10:54:14 -07:00
zvol.h async zvol minor node creation interferes with receive 2020-02-03 09:33:14 -08:00
zvol_impl.h Prefix struct rangelock 2019-11-01 10:37:33 -07:00