Dennis Zhou (Facebook)
c480bcf97b
block: make iolatency avg_lat exponentially decay ...
Currently, avg_lat is calculated by accumulating the mean of every
window in a long running cumulative average. As time goes on, the metric
becomes less and less useful due to the accumulated history.
This patch reuses the same calculation done in load averages to make the
avg_lat metric more lively. Unlike load averages, the avg only advances
when a window elapses (due to an io). Idle periods extend the most
recent window. Bucketing is used to limit the history of avg_lat by
binding it to the window size. So, the window range for 1/exp (decay
rate) is [1 min, 2.5 min) when windows elapse immediately.
The current sample window size is exposed in the debug info to enable
calculation of the window range.
Signed-off-by: Dennis Zhou <dennisszhou@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-08-02 09:58:14 -06:00
block: Track DISCARD statistics and output them in stat and diskstat
2018-07-18 08:44:22 -06:00
ocxl: Document new OCXL IOCTLs
2018-06-03 20:40:33 +10:00
ACPI / Documentation: update ACPI customize method feature docs
2018-06-06 08:48:00 +02:00
block: make iolatency avg_lat exponentially decay
2018-08-02 09:58:14 -06:00
ARM: Device-tree updates
2018-06-11 17:57:38 -07:00
ARM:
2018-04-09 11:42:31 -07:00
Doc: misc-devices: move lcd-panel-cgram.txt to auxdisplay/
2018-04-12 16:08:02 +02:00
block: Track DISCARD statistics and output them in stat and diskstat
2018-07-18 08:44:22 -06:00
zram: introduce zram memory tracking
2018-06-07 17:34:34 -07:00
bpf, doc: howto use/run the BPF selftests
2018-05-14 23:02:58 -07:00
page cache: use xa_lock
2018-04-11 10:28:39 -07:00
Fix Documentation build due to rename of main.c to mtrr.c
2018-06-18 13:41:45 +09:00
cpufreq: Drop cpufreq_table_validate_and_show()
2018-04-10 08:40:45 +02:00
cpuidle: Add definition of residency to sysfs documentation
2018-04-09 13:44:37 +02:00
docs: crypto_engine.rst: Fix two parse warnings
2018-06-15 12:48:59 -03:00
doc: dev-tools: kselftest.rst: update contributing new tests
2018-04-27 16:56:15 -06:00
dm: add writecache target
2018-06-08 11:59:51 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2018-06-27 09:16:53 -07:00
MAINTAINERS & files: Canonize the e-mails I use at files
2018-05-04 06:21:06 -04:00
Move all the dma-mapping code to kernel/dma
2018-06-20 16:30:01 +09:00
Kbuild: rename HAVE_CC_STACKPROTECTOR config variable
2018-06-15 07:15:28 +09:00
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
Merge remote-tracking branch 'drm/drm-next' into drm-misc-next
2018-05-11 18:08:10 +02:00
docs: Fix more broken references
2018-06-15 18:11:26 -03:00
Merge branch 'i2c/for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
2018-06-14 16:21:46 +09:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2018-04-05 13:21:57 -07:00
SCSI misc on 20180610
2018-06-10 13:01:12 -07:00
kconfig: document Kconfig source file comments
2018-06-25 23:21:14 +09:00
platform/x86: thinkpad_acpi: silence HKEY 0x6032, 0x60f0, 0x6030
2018-05-07 15:10:31 +03:00
livepatch: Remove not longer valid limitations from the documentation
2018-05-24 15:37:57 +02:00
docs: Fix more broken references
2018-06-15 18:11:26 -03:00
media: cec: improve cec status documentation
2018-05-25 15:34:50 -04:00
Mostly small fixes and cleanups, plus a non-trivial fix for charlcd
2018-06-07 14:01:16 -07:00
strparser: Corrected typo in documentation.
2018-06-24 16:40:20 +09:00
PCI/AER: Handle ERR_FATAL with removal and re-enumeration of devices
2018-05-17 16:44:13 -05:00
firmware: Fix firmware documentation for recent file renames
2018-04-23 13:03:26 +02:00
There's been a fair amount of work in the docs tree this time around,
2018-06-04 12:34:27 -07:00
doc: Ensure whatisRCU.txt actually says what RCU is
2018-05-15 10:28:12 -07:00
perf: riscv: Add Document for Future Porting Guide
2018-06-04 14:02:11 -07:00
sched/deadline/Documentation: Add overrun signal and GRUB-PA documentation
2018-05-14 09:12:27 +02:00
block: remove BLK_EH_HANDLED
2018-05-29 08:59:21 -06:00
Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables
2018-06-14 12:21:18 +09:00
sound updates for 4.18
2018-06-06 09:08:38 -07:00
Documentation: rstFlatTable.py: fix a broken reference
2018-06-15 18:10:01 -03:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2018-06-06 18:39:49 -07:00
tracing: Fix some errors in histogram documentation
2018-06-21 15:12:44 -04:00
fix a series of Documentation/ broken file name references
2018-06-15 18:10:01 -03:00
doc: usb: Fix typo in gadget_configfs documentation
2018-06-18 12:41:00 +03:00
audit/stable-4.18 PR 20180605
2018-06-06 16:34:00 -07:00
KVM: fix KVM_CAP_HYPERV_TLBFLUSH paragraph number
2018-06-22 17:30:20 +02:00
docs/vm: move ksm and transhuge from "user" to "internals" section.
2018-05-29 06:45:55 -06:00
Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-04 21:34:39 -07:00
docs: admin-guide: add cgroup-v2 documentation
2018-05-10 15:42:41 -06:00
Documentation: remove stale firmware API reference
2018-05-14 16:44:41 +02:00
docs/vm: add index.rst and link MM documentation to top level index
2018-04-16 14:18:15 -06:00
block: Track DISCARD statistics and output them in stat and diskstat
2018-07-18 08:44:22 -06:00
docs: Fix some broken references
2018-06-15 18:10:01 -03:00
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-04 16:40:11 -07:00
vfio/mdev: Check globally for duplicate devices
2018-06-08 10:24:27 -06:00
vfio: fix documentation
2018-05-08 09:16:41 -06:00
c480bcf97b
