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zfs/include/os/linux/spl/sys
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Rich Ercolani 35a6247c5f
Add a delay to tearing down threads. 
It's been observed that in certain workloads (zvol-related being a
big one), ZFS will end up spending a large amount of time spinning
up taskqs only to tear them down again almost immediately, then
spin them up again...

I noticed this when I looked at what my mostly-idle system was doing
and wondered how on earth taskq creation/destroy was a bunch of time...

So I added a configurable delay to avoid it tearing down tasks the
first time it notices them idle, and the total number of threads at
steady state went up, but the amount of time being burned just
tearing down/turning up new ones almost vanished.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes #14938
 		2023-06-26 13:57:12 -07:00
..
ia32 x86 asm: Replace .align with .balign 2023-01-24 09:04:39 -08:00
acl.h Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
atomic.h More aggsum optimizations 2021-06-07 09:02:47 -07:00
byteorder.h Reduce false positives from Static Analyzers 2022-09-30 15:30:12 -07:00
callb.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
callo.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
cmn_err.h spl: cmn_err_once() should be usable in brace-less if else statements 2023-03-15 11:13:25 -07:00
condvar.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
cred.h Linux 6.3 compat: idmapped mount API changes 2023-04-10 14:15:36 -07:00
ctype.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
debug.h debug: fix output from VERIFY0 assertion 2022-10-28 11:46:44 -07:00
disp.h Cleanup: Use OpenSolaris functions to call scheduler 2022-09-12 09:55:37 -07:00
dkio.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
errno.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
fcntl.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
file.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
inttypes.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
isa_defs.h Add loongarch64 support 2023-04-25 16:05:45 -07:00
kmem.h Use __attribute__((malloc)) on memory allocation functions 2023-05-26 15:47:52 -07:00
kmem_cache.h Cleanup of dead code suggested by Clang Static Analyzer (#14380) 2023-01-17 09:57:12 -08:00
kstat.h Cleanup: Switch to strlcpy from strncpy 2022-09-27 16:35:29 -07:00
list.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
misc.h zed: mark disks as REMOVED when they are removed 2022-09-28 09:48:46 -07:00
mod_os.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
mutex.h Linux: Assert mutex is held in mutex_exit() 2023-02-28 17:27:20 -08:00
param.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
proc.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
processor.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
procfs_list.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
random.h FreeBSD: fix compilation of FreeBSD world after 29274c9f6 2021-06-25 10:28:51 -07:00
rwlock.h Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
shrinker.h Linux 6.0 compat: register_shrinker() now var-arg 2022-08-08 16:18:30 -07:00
sid.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
signal.h Add SIGSTOP and SIGTSTP handling to issig 2021-04-15 13:34:35 -07:00
simd.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
stat.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
string.h Forbid b{copy,zero,cmp}(). Don't include <strings.h> for <string.h> 2022-03-15 15:13:48 -07:00
sunddi.h Remove hw_serial, ddi_strtoul() 2022-05-13 10:15:31 -07:00
sysmacros.h zfs_rename: support RENAME_* flags 2022-10-28 09:49:20 -07:00
systeminfo.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
taskq.h Add a delay to tearing down threads. 2023-06-26 13:57:12 -07:00
thread.h Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
time.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
timer.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
trace.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
trace_spl.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
trace_taskq.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
tsd.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
types.h Linux 6.3 compat: idmapped mount API changes 2023-04-10 14:15:36 -07:00
types32.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
uio.h zvol: Support blk-mq for better performance 2022-06-09 08:10:38 -06:00
user.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
vfs.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
vmem.h Use __attribute__((malloc)) on memory allocation functions 2023-05-26 15:47:52 -07:00
vmsystm.h Add membar_sync 2022-09-20 15:32:44 -07:00
vnode.h Consolidate zfs_holey and zfs_access 2020-10-31 09:40:08 -07:00
wait.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
wmsum.h Introduce write-mostly sums 2021-05-27 14:27:29 -06:00
zmod.h Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
zone.h Add Linux namespace delegation support 2022-06-10 09:51:46 -07:00