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Alexander Motin 86706441a8
Introduce write-mostly sums 
wmsum counters are a reduced version of aggsum counters, optimized for
write-mostly scenarios.  They do not provide optimized read functions,
but instead allow much cheaper add function.  The primary usage is
infrequently read statistic counters, not requiring exact precision.

The Linux implementation is directly mapped into percpu_counter KPI.
The FreeBSD implementation is directly mapped into counter(9) KPI.
In user-space due to lack of better implementation mapped to aggsum.

Unfortunately neither Linux percpu_counter nor FreeBSD counter(9)
provide sufficient functionality to completelly replace aggsum, so
it still remains to be used for several hot counters.

Reviewed-by: Paul Dagnelie <pcd@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored-By: iXsystems, Inc.
Closes #12114
 		2021-05-27 14:27:29 -06:00
..
.gitignore Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
Abigail.am Library ABI tracking with abigail 2020-11-17 09:18:52 -08:00
CppCheck.am Fix various typos 2021-04-02 18:52:15 -07:00
Rules.am Forbid strtok(3) 2021-05-26 14:51:30 -07:00
Substfiles.am libzfs: add keylocation=https://, backed by fetch(3) or libcurl 2021-05-12 21:21:35 -07:00
always-arch.m4 Add FreeBSD support to OpenZFS 2020-04-14 11:36:28 -07:00
always-compiler-options.m4 Add FreeBSD support to OpenZFS 2020-04-14 11:36:28 -07:00
always-cppcheck.m4 cppcheck: integrete cppcheck 2021-01-26 16:12:26 -08:00
always-python.m4 Autoconf 2.70 compatibility 2021-01-02 16:55:55 -08:00
always-pyzfs.m4 Autoconf 2.70 compatibility 2021-01-02 16:55:55 -08:00
always-sed.m4 Add compatibility for busybox mktemp 2020-12-03 10:01:16 -08:00
always-system.m4 OpenZFS restructuring - move platform specific headers 2019-09-05 09:34:54 -07:00
ax_code_coverage.m4 Import ZStandard v1.4.5 2020-08-20 10:30:06 -07:00
ax_count_cpus.m4 cppcheck: integrete cppcheck 2021-01-26 16:12:26 -08:00
ax_python_devel.m4 Fix SC2181 ("[ $?") outside tests/ 2021-05-20 08:54:47 -07:00
ax_restore_flags.m4 config: better libtirpc detection 2019-03-02 16:19:05 -08:00
ax_save_flags.m4 config: better libtirpc detection 2019-03-02 16:19:05 -08:00
config.awk Prepare SPL repo to merge with ZFS repo 2018-05-29 14:51:39 -07:00
config.rpath Add config.rpath for AM_GNU_GETTEXT 2020-07-10 14:26:12 -07:00
deb.am Added check for broken alien version 2021-04-08 14:37:51 -07:00
find_system_library.m4 Spruce up pkg-config files for libzfs/libzfs_core 2020-09-04 11:11:18 -07:00
gettext.m4 config: libintl/libiconv for gettext() detection 2019-04-19 12:09:29 -07:00
host-cpu-c-abi.m4 config: libintl/libiconv for gettext() detection 2019-04-19 12:09:29 -07:00
iconv.m4 Clarify comments in config/*.m4, vdev_geom.c, zfs_allow_*.ksh 2020-06-22 09:46:37 -07:00
intlmacosx.m4 config: libintl/libiconv for gettext() detection 2019-04-19 12:09:29 -07:00
kernel-access-ok-type.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-acl.m4 Bend zpl_set_acl to permit the new userns* parameter 2021-05-27 08:55:49 -07:00
kernel-aio-fsync.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-automount.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-bdi.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-bio.m4 Linux 5.12 compat: bio->bi_disk member moved 2021-02-24 10:04:34 -08:00
kernel-bio_max_segs.m4 Linux 5.12 update: bio_max_segs() replaces BIO_MAX_PAGES 2021-03-19 22:33:42 -07:00
kernel-blk-queue.m4 Various Linux kABI cosmetics 2021-05-26 15:26:06 -07:00
kernel-blkdev.m4 Linux 5.11 compat: bdev_whole() 2020-12-27 16:20:33 -08:00
kernel-block-device-operations.m4 linux 5.13 compat: bdevops->revalidate_disk() removed 2021-05-11 19:53:02 -07:00
kernel-clear-inode.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-commit-metadata.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-config-defined.m4 Linux 5.11 compat: conftest 2020-12-27 16:15:19 -08:00
kernel-current-time.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-declare-event-class.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-dentry-operations.m4 Partially revert 5a6ac4c 2019-11-18 13:05:56 -08:00
kernel-dirty-inode.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-discard-granularity.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-encode-fh-inode.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-evict-inode.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-fallocate.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-file-dentry.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-file-inode.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-fmode-t.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-follow-down-one.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-fpu.m4 Linux 5.11 compat: conftest 2020-12-27 16:15:19 -08:00
kernel-fst-mount.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-fsync.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-generic_fillattr.m4 Fix various typos 2021-04-02 18:52:15 -07:00
kernel-generic_io_acct.m4 Linux 5.12 compat: replace bio_*_io_acct with disk_*_io_acct 2021-02-24 10:06:05 -08:00
kernel-generic_readlink.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-get-disk-ro.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-get-link.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-global_page_state.m4 Linux 5.9 compat: NR_SLAB_RECLAIMABLE 2020-08-29 20:57:45 -07:00
kernel-group-info.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-hotplug.m4 Implement memory and CPU hotplug 2020-12-10 14:09:23 -08:00
kernel-in-compat-syscall.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-inode-create.m4 Linux 5.12 compat: idmapped mounts 2021-03-19 21:00:59 -07:00
kernel-inode-getattr.m4 Linux 5.12 compat: idmapped mounts 2021-03-19 21:00:59 -07:00
kernel-inode-lock.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-inode-lookup.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-inode-set-flags.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-inode-set-iversion.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-inode-times.m4 config/kernel-inode-times: initialize timespec 2020-05-04 15:25:48 -07:00
kernel-insert-inode-locked.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-is_owner_or_cap.m4 Various Linux kABI cosmetics 2021-05-26 15:26:06 -07:00
kernel-kmap-atomic-args.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-kmem-cache.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-kmem.m4 Linux 5.8 compat: __vmalloc() 2020-06-08 16:32:02 -07:00
kernel-kstrtoul.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-ktime.m4 Linux 5.6 compat: ktime_get_raw_ts64() 2020-02-27 09:30:45 -08:00
kernel-kuid-helpers.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-kuidgid.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-lseek-execute.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-make-request-fn.m4 Linux 4.18.0-257.el8 compat: blk_alloc_queue() 2020-12-21 10:11:56 -08:00
kernel-misc-minor.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-mkdir.m4 Linux 5.12 compat: idmapped mounts 2021-03-19 21:00:59 -07:00
kernel-mknod.m4 Linux 5.12 compat: idmapped mounts 2021-03-19 21:00:59 -07:00
kernel-mod-param.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-objtool.m4 Linux 5.10 compat: frame.h renamed objtool.h 2020-11-02 22:01:10 +00:00
kernel-pde-data.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-percpu.m4 Introduce write-mostly sums 2021-05-27 14:27:29 -06:00
kernel-proc-operations.m4 Linux 5.6 compat: struct proc_ops 2020-02-07 11:03:53 -08:00
kernel-put-link.m4 Fix typos 2020-06-09 21:24:09 -07:00
kernel-rename.m4 Fixing m4 iops rename check 2021-04-01 08:37:41 -07:00
kernel-revalidate-disk-size.m4 Linux 5.11 compat: revalidate_disk_size() 2020-12-27 16:20:40 -08:00
kernel-rw.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-rwsem.m4 Delete rw_semaphore.wait_lock configure check 2020-12-09 21:22:54 -08:00
kernel-sched.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-security-inode-init.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-set-nlink.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-setattr-prepare.m4 Linux 5.12 compat: idmapped mounts 2021-03-19 21:00:59 -07:00
kernel-sget-args.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-show-options.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-shrink.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-siginfo.m4 Add SIGSTOP and SIGTSTP handling to issig 2021-04-15 13:34:35 -07:00
kernel-signal-stop.m4 Add SIGSTOP and SIGTSTP handling to issig 2021-04-15 13:34:35 -07:00
kernel-special-state.m4 Add SIGSTOP and SIGTSTP handling to issig 2021-04-15 13:34:35 -07:00
kernel-super-userns.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-symlink.m4 Linux 5.12 compat: idmapped mounts 2021-03-19 21:00:59 -07:00
kernel-timer.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-tmpfile.m4 Update tmpfile() existence detection 2021-05-20 16:02:36 -07:00
kernel-totalhigh_pages.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-totalram-pages-func.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-truncate-setsize.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-userns-capabilities.m4 Linux 4.10 compat: has_capability() 2020-07-19 09:56:21 -07:00
kernel-usleep_range.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-vfs-direct_IO.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-vfs-fsync.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel-vfs-getattr.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-vfs-iov_iter.m4 Remove unused iov_iter_init_compat() wrapper 2021-01-30 10:06:14 -08:00
kernel-vfs-iterate.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-vfs-rw-iterate.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-wait.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
kernel-xattr-handler.m4 Linux 5.12 compat: idmapped mounts 2021-03-19 21:00:59 -07:00
kernel-zlib.m4 Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
kernel.m4 Add SIGSTOP and SIGTSTP handling to issig 2021-04-15 13:34:35 -07:00
lib-ld.m4 config: libintl/libiconv for gettext() detection 2019-04-19 12:09:29 -07:00
lib-link.m4 Clarify comments in config/*.m4, vdev_geom.c, zfs_allow_*.ksh 2020-06-22 09:46:37 -07:00
lib-prefix.m4 Clarify comments in config/*.m4, vdev_geom.c, zfs_allow_*.ksh 2020-06-22 09:46:37 -07:00
mount-helper.m4 Autoconf 2.70 compatibility 2021-01-02 16:55:55 -08:00
nls.m4 config: libintl/libiconv for gettext() detection 2019-04-19 12:09:29 -07:00
pkg.m4 Fix typos in config/ 2019-08-30 09:40:30 -07:00
po.m4 config: libintl/libiconv for gettext() detection 2019-04-19 12:09:29 -07:00
progtest.m4 config: libintl/libiconv for gettext() detection 2019-04-19 12:09:29 -07:00
rpm.am config/zfs-build.m4: never define _initramfs in RPM_DEFINE_UTIL 2020-09-12 08:22:07 -07:00
tgz.am Make RPM_DEFINE_KMOD conditional on CONFIG_KERNEL 2020-07-14 17:32:21 -07:00
toolchain-simd.m4 Add FreeBSD support to OpenZFS 2020-04-14 11:36:28 -07:00
user-clock_gettime.m4 Clean up lib dependencies 2020-07-10 14:26:00 -07:00
user-dracut.m4 Autoconf 2.70 compatibility 2021-01-02 16:55:55 -08:00
user-gettext.m4 Add config.rpath for AM_GNU_GETTEXT 2020-07-10 14:26:12 -07:00
user-libaio.m4 Fix up FIND_SYSTEM_LIBRARY to work with cross-compiling 2020-07-10 14:26:40 -07:00
user-libatomic.m4 libspl: implement atomics in terms of atomics 2021-04-18 22:13:24 -07:00
user-libblkid.m4 Fix up FIND_SYSTEM_LIBRARY to work with cross-compiling 2020-07-10 14:26:40 -07:00
user-libcrypto.m4 Fix up FIND_SYSTEM_LIBRARY to work with cross-compiling 2020-07-10 14:26:40 -07:00
user-libexec.m4 Autoconf 2.70 compatibility 2021-01-02 16:55:55 -08:00
user-libfetch.m4 libzfs: add keylocation=https://, backed by fetch(3) or libcurl 2021-05-12 21:21:35 -07:00
user-libtirpc.m4 Fix up FIND_SYSTEM_LIBRARY to work with cross-compiling 2020-07-10 14:26:40 -07:00
user-libudev.m4 Fix up FIND_SYSTEM_LIBRARY to work with cross-compiling 2020-07-10 14:26:40 -07:00
user-libuuid.m4 Fix up FIND_SYSTEM_LIBRARY to work with cross-compiling 2020-07-10 14:26:40 -07:00
user-makedev.m4 Autoconf 2.70 compatibility 2021-01-02 16:55:55 -08:00
user-pam.m4 Use correct prefix for share/pam-configs 2020-07-30 09:09:46 -07:00
user-runstatedir.m4 Add defs for makefile installation dir vars 2014-03-31 16:11:13 -07:00
user-systemd.m4 Autoconf 2.70 compatibility 2021-01-02 16:55:55 -08:00
user-sysvinit.m4 Autoconf 2.70 compatibility 2021-01-02 16:55:55 -08:00
user-udev.m4 Autoconf 2.70 compatibility 2021-01-02 16:55:55 -08:00
user-zlib.m4 Fix up FIND_SYSTEM_LIBRARY to work with cross-compiling 2020-07-10 14:26:40 -07:00
user.m4 libzfs: add keylocation=https://, backed by fetch(3) or libcurl 2021-05-12 21:21:35 -07:00
zfs-build.m4 Added check for broken alien version 2021-04-08 14:37:51 -07:00
zfs-meta.m4 Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00