diff options
| author | Wright Feng <[email protected]> | 2020-06-24 04:16:08 -0500 |
|---|---|---|
| committer | Kalle Valo <[email protected]> | 2020-07-14 12:50:07 +0300 |
| commit | 2fa8085fc6daa255c591e754f66ba98035b797c3 (patch) | |
| tree | 80e7e9946a433e2ed11571d29c1caefdb20854ec /tools/perf/scripts/python | |
| parent | fcdd7a875def793c38d7369633af3eba6c7cf089 (diff) | |
brcmfmac: set pacing shift before transmitting skb to bus
Linux 3.6 introduces TSQ which has a per socket threshold for TCP Tx
packet to reduce latency. In flow control mode, host driver enqueues skb
in hanger and TCP doesn't push new skb frees until host frees the skb when
receiving fwstatus event. So set pacing shift 8 to send them as a single
large aggregate frame to the bus layer.
43455 TX TCP throughput in different FC modes on Linux 5.4.18
sk_pacing_shift : Throughput (fcmode=0)
10: 245 Mbps
9: 245 Mbps
8: 246 Mbps
7: 246 Mbps
sk_pacing_shift : Throughput (fcmode=1)
10: 182 Mbps
9: 197 Mbps
8: 206 Mbps
7: 207 Mbps
sk_pacing_shift : Throughput (fcmode=2)
10: 180 Mbps
9: 197 Mbps
8: 206 Mbps
7: 207 Mbps
Signed-off-by: Wright Feng <[email protected]>
Signed-off-by: Chi-hsien Lin <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions