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Adrian Chadd b4967c9b6f [ath_rate_sample] Have the final attempted rate in 11n modes to be the lowest one. 
Right now ath_rate_sample has a fixed rate schedule, rather than the minstrel_ht
style "best, good, most reliable" triplet.  So, if higher rates are tried then
it'll not fail back to a lower MCS rate in that transmission schedule.

This means that in low SNR situations it'll not easily drop to MCS0 unless enough
transmissions occur to allow rate control to eventually decide to drop; and if
it's TCP traffic it'll get slowed down because of packet loss.

It's worse for 2-stream and 3-stream rates; it doesn't ever fall back to lower
stream rates, and these higher stream rates required higher SNR to work.

So instead let's (for now?) have each of the 11n transmit rates use MCS0 as
the last attempt. ath_rate_sample will quickly see that rate succeeds more
and will move to it much quicker.

Testing:

* AR9344 (Wasp) - 2G STA mode
2019-05-05 06:32:40 +00:00
..
amd64 x86: Implement MWAIT support for stopping a CPU 2019-05-04 20:34:26 +00:00
arm Add a COMPAT_FREEBSD12 kernel option. 2019-05-02 18:10:23 +00:00
arm64 arm64: Properly restore PAN when done with userspace access in casueword. 2019-05-04 19:40:30 +00:00
bsm Create new EINTEGRITY error with message "Integrity check failed". 2019-01-17 06:35:45 +00:00
cam Report DIF protection type the disk is formatted with. 2019-04-22 01:08:14 +00:00
cddl Add mutex_destroy() missed in r334844. 2019-04-26 19:02:21 +00:00
compat Fix regression issue after r346645 in the LinuxKPI. 2019-05-04 09:47:01 +00:00
conf Add a COMPAT_FREEBSD12 kernel option. 2019-05-02 18:10:23 +00:00
contrib Left justify a function header brace as it should be. 2019-04-28 04:05:43 +00:00
crypto Embedded chacha: Add 0-bit iv + 128-bit counter mode 2019-03-01 23:30:23 +00:00
ddb ddb: Print the thread's pcb in 'show thread' 2019-02-09 21:08:19 +00:00
dev [ath_rate_sample] Have the final attempted rate in 11n modes to be the lowest one. 2019-05-05 06:32:40 +00:00
dts arm64: Add support for NanoPI NEO2 2019-05-02 12:56:13 +00:00
fs Add #ifdef INET as requested by bz@. 2019-04-21 22:53:51 +00:00
gdb
geom Call delist_dev() before destroy_dev_sched_cb(). 2019-04-24 19:56:02 +00:00
gnu Import DTS files from Linux 5.0 2019-04-10 18:15:36 +00:00
i386 x86: Implement MWAIT support for stopping a CPU 2019-05-04 20:34:26 +00:00
isa
kern x86: Implement MWAIT support for stopping a CPU 2019-05-04 20:34:26 +00:00
kgssapi * Handle SIGPIPE in gssd 2019-02-21 01:30:37 +00:00
libkern Revert r346410 and r346411 2019-04-19 22:08:17 +00:00
mips Add a COMPAT_FREEBSD12 kernel option. 2019-05-02 18:10:23 +00:00
modules dtb: Include RK3399 RockPro64 DTS in kernel build 2019-05-02 17:04:01 +00:00
net Allow iflib drivers to pass a pointer to their own ifmedia structure. 2019-05-03 20:05:31 +00:00
net80211 net80211: correct check for SMPS node flags updates 2019-03-18 02:40:22 +00:00
netgraph Remove 'dir' argument in ng_ipfw_input, since ip_fw_args now has this info. 2019-03-14 22:30:05 +00:00
netinet ip multicast debug: fix strings vs defines 2019-04-29 18:09:55 +00:00
netinet6 Track TCP connection's NUMA domain in the inpcb 2019-04-25 15:37:28 +00:00
netipsec Replace read_random(9) with more appropriate arc4rand(9) KPIs 2019-04-04 01:02:50 +00:00
netpfil Add IPv6 support for O_IPLEN opcode. 2019-04-29 09:33:16 +00:00
netsmb Remove unused argument to priv_check_cred. 2018-12-11 19:32:16 +00:00
nfs
nfsclient
nfsserver
nlm
ofed Mechanical cleanup of epoch(9) usage in network stack. 2019-01-09 01:11:19 +00:00
opencrypto Don't panic for empty CCM requests. 2019-04-24 23:27:39 +00:00
powerpc powerpc/mpc85xx: Attach MPC85xx PCI bus and root complex at the right pass 2019-05-04 16:24:43 +00:00
riscv Deactivate IRQ resource by calling to intr_deactivate_irq(). 2019-05-01 15:03:12 +00:00
rpc Fix malloc stats for the RPCSEC_GSS server code when DEBUG is enabled. 2019-04-04 01:23:06 +00:00
security When MAC is enabled and a policy module is loaded, don't unconditionally 2019-05-03 20:38:43 +00:00
sparc64 Add a COMPAT_FREEBSD12 kernel option. 2019-05-02 18:10:23 +00:00
sys Fix regression issue after r346645 in the LinuxKPI. 2019-05-04 09:47:01 +00:00
teken Attempt to complete fixing programmable function keys for syscons. 2019-02-20 02:14:41 +00:00
tests Regularize the Netflix copyright 2019-02-04 21:28:25 +00:00
tools make_dtb.sh: Use $CPP instead of assuming that cpp is in $PATH 2018-12-14 23:53:28 +00:00
ufs Zero out the file directory entry metadata to reduce disk 2019-05-04 18:00:57 +00:00
vm fls() should find the most significant bit of an int faster than a 2019-05-03 02:55:54 +00:00
x86 x86: Implement MWAIT support for stopping a CPU 2019-05-04 20:34:26 +00:00
xdr
xen xen: introduce a new way to setup event channel upcall 2019-01-30 11:34:52 +00:00
Makefile