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9d2e4290ff
freebsd-dev/sys
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Mateusz Guzik 9d2e4290ff sx: uninline slock/sunlock 
Shared locking routines explicitly read the value and test it. If the
change attempt fails, they fall back to a regular function which would
retry in a loop.

The problem is that with many concurrent readers the risk of failure is pretty
high and even the value returned by fcmpset is very likely going to be stale
by the time the loop in the fallback routine is reached.

Uninline said primitives. It gives a throughput increase when doing concurrent
slocks/sunlocks with 80 hardware threads from ~50 mln/s to ~56 mln/s.

Interestingly, rwlock primitives are already not inlined.
2017-02-05 05:20:29 +00:00
..
amd64 Revert r313037 2017-02-04 06:24:49 +00:00
arm Define the vm_ooffset_t and vm_pindex_t types as machine-independend. 2017-02-04 12:26:38 +00:00
arm64 Define the vm_ooffset_t and vm_pindex_t types as machine-independend. 2017-02-04 12:26:38 +00:00
boot loader: libefi/env.c warnings in arm build 2017-02-03 16:39:10 +00:00
bsm
cam Revert crap accidentally committed 2017-01-28 16:31:23 +00:00
cddl Ensure that the DOF string length is divisible by 2. 2017-02-05 02:47:34 +00:00
compat Add kern_pread() and kern_pwrite(), and use it in compats instead 2017-01-31 15:35:18 +00:00
conf For i386, remove config options CPU_DISABLE_CMPXCHG, CPU_DISABLE_SSE 2017-02-03 12:51:40 +00:00
contrib [ath_hal] [ar9300] link in the CAC enable/diable methods and expose it via the HAL. 2017-02-03 05:15:35 +00:00
crypto Remove pc98 support completely. 2017-01-28 02:22:15 +00:00
ddb Revert crap accidentally committed 2017-01-28 16:31:23 +00:00
dev Fix some more overly long lines, whitespace and other bugs according to 2017-02-04 19:35:38 +00:00
fs Revert crap accidentally committed 2017-01-28 16:31:23 +00:00
gdb
geom Check that primary GPT header is valid before wiping partitioning. 2017-02-04 05:09:47 +00:00
gnu Add Ingenic X1000 DTS files (unofficial). 2016-11-19 15:03:49 +00:00
i386 For i386, remove config options CPU_DISABLE_CMPXCHG, CPU_DISABLE_SSE 2017-02-03 12:51:40 +00:00
isa Remove pc98 support completely. 2017-01-28 02:22:15 +00:00
kern sx: uninline slock/sunlock 2017-02-05 05:20:29 +00:00
kgssapi
libkern calculate_crc32c: Add SSE4.2 implementation on x86 2017-01-31 03:26:32 +00:00
mips Define the vm_ooffset_t and vm_pindex_t types as machine-independend. 2017-02-04 12:26:38 +00:00
modules Replace the implementation of DTrace's RAND subroutine for generating 2017-02-03 22:26:19 +00:00
net Delete duplicate break. 2017-02-04 18:25:09 +00:00
net80211 [net80211] don't update quiet time counter values every probe request. 2017-02-03 06:04:06 +00:00
netgraph mppc - Finish pluging NETGRAPH_MPPC_COMPRESSION. 2017-01-20 00:02:11 +00:00
netinet Fix VIMAGE-related bugs in TFO. The autokey callout vnet context was 2017-02-03 17:02:57 +00:00
netinet6 Garbage collect IFT_IEEE80211 (but leave the define for possible reuse) 2017-01-28 17:08:40 +00:00
netipsec Add direction argument to ipsec_setspidx_inpcb() function. 2017-01-08 12:40:07 +00:00
netnatm
netpfil Fix indentantion in pf_purge_thread(). No functional change. 2017-01-30 22:47:48 +00:00
netsmb
nfs
nfsclient
nfsserver
nlm
ofed Move the ConnectX-3 and ConnectX-2 driver from sys/ofed into sys/dev/mlx4 2016-09-30 08:23:06 +00:00
opencrypto Add support for the fpu_kern(9) KPI on arm64. It hooks into the existing 2016-10-20 09:22:10 +00:00
powerpc Define the vm_ooffset_t and vm_pindex_t types as machine-independend. 2017-02-04 12:26:38 +00:00
riscv Implement atomic_fcmpset_*() for RISC-V. 2017-02-05 00:32:12 +00:00
rpc
security Audit 'fd' and 'cmd' arguments to fcntl(2), and when generating BSM, 2016-11-22 00:41:24 +00:00
sparc64 Define the vm_ooffset_t and vm_pindex_t types as machine-independend. 2017-02-04 12:26:38 +00:00
sys sx: uninline slock/sunlock 2017-02-05 05:20:29 +00:00
teken
tests
tools Replace using of objdump with elfdump 2017-01-10 18:46:40 +00:00
ufs ffs_vnops: Simplify extattr access 2017-01-19 16:46:05 +00:00
vm Style, use tab after #define. 2017-02-04 19:16:19 +00:00
x86 Define the vm_ooffset_t and vm_pindex_t types as machine-independend. 2017-02-04 12:26:38 +00:00
xdr
xen "Buses" is the preferred plural of "bus" 2017-01-15 17:54:01 +00:00
Makefile Remove pc98 support completely. 2017-01-28 02:22:15 +00:00