diff options
| author |   Fan Du <fan.du@intel.com> | 2015-03-06 11:18:23 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-03-06 14:57:41 -0500 |
| commit | 6b58e0a5f32dedb609438bb9c9c82aa6e23381f2 (patch) | |
| tree | dcfd707a04fd8295b1384cc18fc60addf22ae23a /net/ipv4/tcp_timer.c | |
| parent | ipv4: Raise tcp PMTU probe mss base size (diff) | |
| download | linux-dev-6b58e0a5f32dedb609438bb9c9c82aa6e23381f2.tar.xz linux-dev-6b58e0a5f32dedb609438bb9c9c82aa6e23381f2.zip | |
ipv4: Use binary search to choose tcp PMTU probe_size
Current probe_size is chosen by doubling mss_cache,
the probing process will end shortly with a sub-optimal
mss size, and the link mtu will not be taken full
advantage of, in return, this will make user to tweak
tcp_base_mss with care.
Use binary search to choose probe_size in a fine
granularity manner, an optimal mss will be found
to boost performance as its maxmium.
In addition, introduce a sysctl_tcp_probe_threshold
to control when probing will stop in respect to
the width of search range.
Test env:
Docker instance with vxlan encapuslation(82599EB)
iperf -c 10.0.0.24 -t 60
before this patch:
1.26 Gbits/sec
After this patch: increase 26%
1.59 Gbits/sec
Signed-off-by: Fan Du <fan.du@intel.com>
Acked-by: John Heffner <johnwheffner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions