diff options
| author | Fabricio Voznika <fvoznika@google.com> | 2019-03-13 15:24:09 -0700 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2019-03-13 15:25:13 -0700 |
| commit | 70d06134442843cd4355590c4155ee6594558c00 (patch) | |
| tree | cdb69870a4dca022f131128610219230fd96b64f | |
| parent | dfbd3c6e4a15cf0c9488b2eb01899790407b164d (diff) | |
Reduce PACKET_RX_RING memory usage
Previous memory allocation was excessive (80 MB). Changed
it to use 2 MB instead. There is no drop in perfomance due
to this change:
ab -n 100 -c 10 http://server/latin10m.txt ==> 10 MB file
80 MB: 178 MB/s
2 MB: 181 MB/s
PiperOrigin-RevId: 238321594
Change-Id: I1c8aed13cad5d75f4506d2b406b305117055fbe5
| -rw-r--r-- | pkg/tcpip/link/fdbased/mmap_amd64_unsafe.go | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/pkg/tcpip/link/fdbased/mmap_amd64_unsafe.go b/pkg/tcpip/link/fdbased/mmap_amd64_unsafe.go index d88c3f8a5..e49cf9f61 100644 --- a/pkg/tcpip/link/fdbased/mmap_amd64_unsafe.go +++ b/pkg/tcpip/link/fdbased/mmap_amd64_unsafe.go @@ -40,11 +40,13 @@ const ( // We overallocate the frame size to accommodate space for the // TPacketHdr+RawSockAddrLinkLayer+MAC header and any padding. // +// Memory allocated for the ring buffer: tpBlockSize * tpBlockNR = 2 MiB +// // NOTE: Frames need to be aligned at 16 byte boundaries. const ( tpFrameSize = 65536 + 128 - tpBlockSize = tpFrameSize * 128 - tpBlockNR = 10 + tpBlockSize = tpFrameSize * 32 + tpBlockNR = 1 tpFrameNR = (tpBlockSize * tpBlockNR) / tpFrameSize ) |