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| author | Hariprasad Shenai <hariprasad@chelsio.com> | 2015-02-04 15:32:52 +0530 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-02-04 23:55:58 -0800 |
| commit | 3a336cb17183b29827fdffaffb5e62f8912f5ca1 (patch) | |
| tree | 0ca09203cd1f8ace3496ad697e85679c658f0861 /lib/test_module.c | |
| parent | 3fcf9011188755c883f377764c463b4271d594a2 (diff) | |
cxgb4: Add low latency socket busy_poll support
cxgb_busy_poll, corresponding to ndo_busy_poll, gets called by the socket
waiting for data.
With busy_poll enabled, improvement is seen in latency numbers as observed by
collecting netperf TCP_RR numbers.
Below are latency number, with and without busy-poll, in a switched environment
for a particular msg size:
netperf command: netperf -4 -H <ip> -l 30 -t TCP_RR -- -r1,1
Latency without busy-poll: ~16.25 us
Latency with busy-poll : ~08.79 us
Based on original work by Kumar Sanghvi <kumaras@chelsio.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/test_module.c')
0 files changed, 0 insertions, 0 deletions