Re: [Make-wifi-fast] [PATCH] killing retries harder, perhaps

[Dave Taht <dave.taht@gmail.com>]

The net effect of
http://mirrors.bufferbloat.net/~kevindb/999-daves-special-patch.patch
of:

#define ATH_NON_AGGR_MIN_QDEPTH    2
#define ATH_MAX_SW_RETRIES      2
#define ATH_TXFIFO_DEPTH           3

was to disable ampdu generation entirely, and ship pure MPDUs instead,
which gives me a solid bound of about 15Mbits transfers in my noisy
tests (where I'd see anywhere from 4Mbit to 80mbit with ampdus).

http://pastebin.com/WU390GFL

I note: I have *always* wanted to measure these with aggregation
completely out of the loop, so this is kind of inadvertently awesome.

root@archer-atf:/sys/kernel/debug/ieee80211/phy1/ath9k# cat xmit
                            BE         BK        VI        VO

MPDUs Queued:                0          0         0      1234
MPDUs Completed:       6402806          0         0      1234
MPDUs XRetried:             19          0         0         0
Aggregates:                  0          0         0         0
AMPDUs Queued HW:            0          0         0         0
AMPDUs Completed:            0          0         0         0
AMPDUs Retried:              0          0         0         0
AMPDUs XRetried:             0          0         0         0
TXERR Filtered:            115          0         0         0
FIFO Underrun:               0          0         0         0
TXOP Exceeded:               0          0         0         0
TXTIMER Expiry:              0          0         0         0
DESC CFG Error:              0          0         0         0
DATA Underrun:               0          0         0         0
DELIM Underrun:              0          0         0         0
TX-Pkts-All:           6402825          0         0      1234
TX-Bytes-All:       1171739830          0         0    178778
HW-put-tx-buf:         3213134          0         0      1233
HW-tx-start:                 0          0         0         0
HW-tx-proc-desc:       6402825          0         0      1234
TX-Failed:                   0          0         0         0




http://pastebin.com/WU390GFL