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455219675d
freebsd-skq/sys
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Alexander Motin 455219675d Change mwait_bm_avoidance use to match Linux. 
Even though the information is very limited, it seems the intent of
this flag is to control ACPI_BITREG_BUS_MASTER_STATUS use for C3,
not force ACPI_BITREG_ARB_DISABLE manipulations for C2, where it was
never needed, and which register not really doing anything for years.
It wasted lots of CPU time on congested global ACPI hardware lock
when many CPU cores were trying to enter/exit deep C-states same time.

On idle 80-core system it pushed ping localhost latency up to 20ms,
since badport_bandlim() via counter_ratecheck() wakes up all CPUs
same time once a second just to synchronously reset the counters.
Now enabling C-states increases the latency from 0.1 to just 0.25ms.

Discussed with:	kib
MFC after:	1 month
2021-03-08 18:27:36 -05:00
..
amd64 Rename _cscan_atomic.h and _cscan_bus.h to atomic_san.h and bus_san.h 2021-03-08 12:39:06 -05:00
arm mvebu_gpio: Fix settings of gpio pin direction. 2021-03-07 11:41:30 +01:00
arm64 Rename _cscan_atomic.h and _cscan_bus.h to atomic_san.h and bus_san.h 2021-03-08 12:39:06 -05:00
bsm Add aio_writev and aio_readv 2021-01-02 19:57:58 -07:00
cam Do not exit ctl_be_block_worker() prematurely. 2021-03-05 22:45:47 -05:00
cddl Handle functions that use a nop in the arm64 fbt 2021-03-03 14:18:03 +00:00
compat linux: add support for SO_PEERGROUPS 2021-03-06 19:48:58 +00:00
conf kern.mk: Fix wrong variable being used for linker path after 172a624f0 2021-03-08 09:37:46 +00:00
contrib Fix dpdk/ldradix fib lookup algorithm preference calculation. 2021-03-07 22:17:53 +00:00
crypto armv8crypto: fix AES-XTS regression introduced by ed9b7f44 2021-03-07 12:03:47 -08:00
ddb ddb: just move cursor when the lexer backs up 2021-02-24 15:56:16 -08:00
dev Change mwait_bm_avoidance use to match Linux. 2021-03-08 18:27:36 -05:00
dts Remove DTS files for arm boards we don't support 2021-01-27 10:02:01 +00:00
fs nfsclient: Fix ReadDS/WriteDS/CommitDS nfsstats RPC counts for a NFSv3 DS 2021-03-02 14:18:23 -08:00
gdb Use atomic loads/stores when updating td->td_state 2021-02-18 14:02:48 +00:00
geom opencrypto: Introduce crypto_dispatch_async() 2021-02-08 09:19:19 -05:00
gnu Remove the old dts imported tree. 2021-01-15 20:09:55 +01:00
i386 acpi: Make nexus_acpi quiet on amd64 and i386 2021-03-05 12:54:00 -05:00
isa Move back the isa non-PNP driver deadline to FreeBSD 14. 2021-03-08 16:00:23 -07:00
kern config_intrhook: Move from TAILQ to STAILQ and padding 2021-03-08 15:59:00 -07:00
kgssapi opencrypto: Introduce crypto_dispatch_async() 2021-02-08 09:19:19 -05:00
libkern Restore the augmented strlen commentary 2021-02-08 19:15:21 +00:00
mips [ar71xx] Fix routerstation / routerstation pro redboot FIS probing 2021-02-25 13:14:55 -08:00
modules ice(4): Update to version 0.28.1-k 2021-03-05 17:33:39 -08:00
net iflib: Make if_shared_ctx_t a pointer to const 2021-03-08 12:39:06 -05:00
net80211 net80211: ratectl header guard against multiple inclusions 2021-03-07 17:35:58 +00:00
netgraph netgraph/ng_bridge: Add counters for the first link, too 2021-02-10 19:05:37 +01:00
netinet tcp: Add prr_out in preparation for PRR/nonSACK and LRD 2021-03-06 00:38:22 +01:00
netinet6 Fix 'in6_purgeaddr: err=65, destination address delete failed' message. 2021-03-08 21:28:35 +00:00
netipsec Revert "SO_RERROR indicates that receive buffer overflows should be handled as errors." 2021-02-08 22:32:32 +00:00
netpfil net: Introduce IPV6_DSCP(), IPV6_ECN() and IPV6_TRAFFIC_CLASS() macros 2021-03-04 20:56:48 +01:00
netsmb
nfs
nfsclient
nfsserver nfs: Mark unused statistics variable as reserved 2020-11-18 04:35:49 +00:00
nlm
ofed ofed: quiet gcc -Wint-in-bool-context 2021-02-24 15:56:16 -08:00
opencrypto opencrypto: Make cryptosoft attach silently 2021-03-05 13:11:25 -05:00
powerpc [PowerPC] Fix AP bringup on 32-bit AIM SMP 2021-03-06 15:46:28 -06:00
riscv riscv: fix errors in some atomic type aliases 2021-03-04 16:59:58 -04:00
rpc nfs-over-tls: handle res.gid.gid_val correctly for memory allocation 2021-01-12 13:59:52 -08:00
security Add a comment on why the call to mac_vnode_relabel() might be in the wrong 2021-02-27 16:25:26 +00:00
sys config_intrhook: Move from TAILQ to STAILQ and padding 2021-03-08 15:59:00 -07:00
teken loader: implement framebuffer console 2021-01-02 21:41:36 +02:00
tests Enable running fib tests inside vnet jail. 2021-01-17 20:32:26 +00:00
tools syscalls.master: Add a new syscall type: RESERVED 2021-01-26 18:27:44 +00:00
ufs FFS extattr: fix handling of the tail 2021-03-02 02:19:34 +02:00
vm vm: Round up npages and alignment for contig reclamation 2021-03-02 10:21:02 -05:00
x86 x86: tsc: deprioritize TSC on VirtualBox 2021-03-08 14:43:06 -06:00
xdr
xen xen: remove .swp file from public headers 2021-01-11 18:14:11 +01:00
Makefile