diff options
| author | Bhasker Hariharan <bhaskerh@google.com> | 2019-04-26 12:50:38 -0700 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2019-04-26 12:52:02 -0700 |
| commit | 228dc15fd13eb91f03a907f75a3fbcec692a61a3 (patch) | |
| tree | d73b8dff4f5cffd3f616cf55407f1d16265accae /pkg/tcpip/link | |
| parent | 59442238d4d9e48433cd0601ffa53e280fb872bc (diff) | |
Bump the AF_PACKET socket rcv buf size to 4MB by default.
Packet socket receive buffers default to the sysctl value of
net.core.rmem_default and are capped by net.core.rmem_max both
which are usually set to 208KB on most systems.
Since we can't expect every gVisor user to bump these we use
SO_RCVBUFFORCE to exceed the limit. This is possible as runsc runs
with CAP_NET_ADMIN outside the sandbox and can do this before
the FD is passed to the sentry inside the sandbox.
Updates #211
iperf output w/ 4MB buffer.
iperf3 -c 172.17.0.2 -t 100
Connecting to host 172.17.0.2, port 5201
[ 4] local 172.17.0.1 port 40378 connected to 172.17.0.2 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.02 MBytes
[ 4] 1.00-2.00 sec 1.18 GBytes 10.2 Gbits/sec 0 1.02 MBytes
[ 4] 2.00-3.00 sec 965 MBytes 8.09 Gbits/sec 0 1.02 MBytes
[ 4] 3.00-4.00 sec 942 MBytes 7.90 Gbits/sec 0 1.02 MBytes
[ 4] 4.00-5.00 sec 952 MBytes 7.99 Gbits/sec 0 1.02 MBytes
[ 4] 5.00-6.00 sec 1.14 GBytes 9.81 Gbits/sec 0 1.02 MBytes
[ 4] 6.00-7.00 sec 1.13 GBytes 9.68 Gbits/sec 0 1.02 MBytes
[ 4] 7.00-8.00 sec 930 MBytes 7.80 Gbits/sec 0 1.02 MBytes
[ 4] 8.00-9.00 sec 1.15 GBytes 9.91 Gbits/sec 0 1.02 MBytes
[ 4] 9.00-10.00 sec 938 MBytes 7.87 Gbits/sec 0 1.02 MBytes
[ 4] 10.00-11.00 sec 737 MBytes 6.18 Gbits/sec 0 1.02 MBytes
[ 4] 11.00-12.00 sec 1.16 GBytes 9.93 Gbits/sec 0 1.02 MBytes
[ 4] 12.00-13.00 sec 917 MBytes 7.69 Gbits/sec 0 1.02 MBytes
[ 4] 13.00-14.00 sec 1.19 GBytes 10.2 Gbits/sec 0 1.02 MBytes
[ 4] 14.00-15.00 sec 1.01 GBytes 8.70 Gbits/sec 0 1.02 MBytes
[ 4] 15.00-16.00 sec 1.20 GBytes 10.3 Gbits/sec 0 1.02 MBytes
[ 4] 16.00-17.00 sec 1.14 GBytes 9.80 Gbits/sec 0 1.02 MBytes
^C[ 4] 17.00-17.60 sec 718 MBytes 10.1 Gbits/sec 0 1.02 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-17.60 sec 18.4 GBytes 8.98 Gbits/sec 0 sender
[ 4] 0.00-17.60 sec 0.00 Bytes 0.00 bits/sec receiver
PiperOrigin-RevId: 245470590
Change-Id: I1c08c5ee8345de6ac070513656a4703312dc3c00
Diffstat (limited to 'pkg/tcpip/link')
| -rw-r--r-- | pkg/tcpip/link/fdbased/endpoint.go | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/pkg/tcpip/link/fdbased/endpoint.go b/pkg/tcpip/link/fdbased/endpoint.go index 6354688e2..8f4d67074 100644 --- a/pkg/tcpip/link/fdbased/endpoint.go +++ b/pkg/tcpip/link/fdbased/endpoint.go @@ -197,8 +197,9 @@ func New(opts *Options) (tcpip.LinkEndpointID, error) { return stack.RegisterLinkEndpoint(e), nil case RecvMMsg: - // If the provided FD is a socket then we optimize packet reads by - // using recvmmsg() instead of read() to read packets in a batch. + // If the provided FD is a socket then we optimize + // packet reads by using recvmmsg() instead of read() to + // read packets in a batch. e.inboundDispatcher = e.recvMMsgDispatch msgsPerRecv = MaxMsgsPerRecv } |