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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-12-01 00:45:56 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-12-06 23:59:05 +0300 |
| commit | da2033c282264bfba4e339b7cb3df62adb5c5fc8 (patch) | |
| tree | 8a28a32439f073b5b99d0782ee295cb458e108cb /Documentation/io-mapping.txt | |
| parent | 539995d18649023199986424d140f1d620372ce5 (diff) | |
| download | linux-da2033c282264bfba4e339b7cb3df62adb5c5fc8.tar.xz | |
filter: add SKF_AD_RXHASH and SKF_AD_CPU
Add SKF_AD_RXHASH and SKF_AD_CPU to filter ancillary mechanism,
to be able to build advanced filters.
This can help spreading packets on several sockets with a fast
selection, after RPS dispatch to N cpus for example, or to catch a
percentage of flows in one queue.
tcpdump -s 500 "cpu = 1" :
[0] ld CPU
[1] jeq #1 jt 2 jf 3
[2] ret #500
[3] ret #0
# take 12.5 % of flows (average)
tcpdump -s 1000 "rxhash & 7 = 2" :
[0] ld RXHASH
[1] and #7
[2] jeq #2 jt 3 jf 4
[3] ret #1000
[4] ret #0
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Rui <wirelesser@gmail.com>
Acked-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/io-mapping.txt')
0 files changed, 0 insertions, 0 deletions