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| author | Rusty Russell <rusty@rustcorp.com.au> | 2014-09-11 10:17:37 +0930 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-09-13 12:50:46 -0400 |
| commit | eeebf9b1fc0862466c5661d63fbaf66ab4a50210 (patch) | |
| tree | a0b217e5f0c70869c73b270ee8faa75c250a2b2f /fs/binfmt_aout.c | |
| parent | a58354409a00f2d8f7882c6a91fde1df5d0a4bb8 (diff) | |
| download | linux-eeebf9b1fc0862466c5661d63fbaf66ab4a50210.tar.bz2 | |
virtio_ring: assume sgs are always well-formed.
We used to have several callers which just used arrays. They're
gone, so we can use sg_next() everywhere, simplifying the code.
On my laptop, this slowed down vring_bench by 15%:
vring_bench before:
936153354-967745359(9.44739e+08+/-6.1e+06)ns
vring_bench after:
1061485790-1104800648(1.08254e+09+/-6.6e+06)ns
However, a more realistic test using pktgen on a AMD FX(tm)-8320 saw
a few percent improvement:
pktgen before:
767390-792966(785159+/-6.5e+03)pps 356-367(363.75+/-2.9)Mb/sec (356068960-367936224(3.64314e+08+/-3e+06)bps) errors: 0
pktgen after:
787781-796334(793165+/-2.4e+03)pps 365-369(367.5+/-1.2)Mb/sec (365530384-369498976(3.68028e+08+/-1.1e+06)bps) errors: 0
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/binfmt_aout.c')
0 files changed, 0 insertions, 0 deletions