diff options
author | Bhasker Hariharan <bhaskerh@google.com> | 2020-01-15 11:17:25 -0800 |
---|---|---|
committer | gVisor bot <gvisor-bot@google.com> | 2020-01-15 11:19:06 -0800 |
commit | f874723e64bd8a2e747bb336e0b6b8f0da1f044a (patch) | |
tree | 89ffdd38a448565d7b86184e8232f89455f143b7 /runsc/sandbox | |
parent | ff78a721700f8b7d3c8dae14fc14c04f3a82b970 (diff) |
Bump SO_SNDBUF for fdbased endpoint used by runsc.
Updates #231
PiperOrigin-RevId: 289897881
Diffstat (limited to 'runsc/sandbox')
-rw-r--r-- | runsc/sandbox/network.go | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/runsc/sandbox/network.go b/runsc/sandbox/network.go index be8b72b3e..ff48f5646 100644 --- a/runsc/sandbox/network.go +++ b/runsc/sandbox/network.go @@ -321,16 +321,21 @@ func createSocket(iface net.Interface, ifaceLink netlink.Link, enableGSO bool) ( } } - // Use SO_RCVBUFFORCE because on linux the receive buffer for an - // AF_PACKET socket is capped by "net.core.rmem_max". rmem_max - // defaults to a unusually low value of 208KB. This is too low - // for gVisor to be able to receive packets at high throughputs - // without incurring packet drops. - const rcvBufSize = 4 << 20 // 4MB. - - if err := syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_RCVBUFFORCE, rcvBufSize); err != nil { - return nil, fmt.Errorf("failed to increase socket rcv buffer to %d: %v", rcvBufSize, err) + // Use SO_RCVBUFFORCE/SO_SNDBUFFORCE because on linux the receive/send buffer + // for an AF_PACKET socket is capped by "net.core.rmem_max/wmem_max". + // wmem_max/rmem_max default to a unusually low value of 208KB. This is too low + // for gVisor to be able to receive packets at high throughputs without + // incurring packet drops. + const bufSize = 4 << 20 // 4MB. + + if err := syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_RCVBUFFORCE, bufSize); err != nil { + return nil, fmt.Errorf("failed to increase socket rcv buffer to %d: %v", bufSize, err) } + + if err := syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_SNDBUFFORCE, bufSize); err != nil { + return nil, fmt.Errorf("failed to increase socket snd buffer to %d: %v", bufSize, err) + } + return &socketEntry{deviceFile, gsoMaxSize}, nil } |