diff options
| author | Jordan Whited <jordan@tailscale.com> | 2023-10-31 19:53:35 -0700 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2023-12-11 16:27:22 +0100 |
| commit | d0bc03c707974a84a672716c718f99fab49e7eb8 (patch) | |
| tree | 2d11dff4d00bdee8b22a570b1db665f523f38a73 /tun/testdata | |
| parent | 1cf89f5339b549236f38ce5fbc40f7bf993d9626 (diff) | |
tun: implement UDP GSO/GRO for Linux
Implement UDP GSO and GRO for the Linux tun.Device, which is made
possible by virtio extensions in the kernel's TUN driver starting in
v6.2.
secnetperf, a QUIC benchmark utility from microsoft/msquic@8e1eb1a, is
used to demonstrate the effect of this commit between two Linux
computers with i5-12400 CPUs. There is roughly ~13us of round trip
latency between them. secnetperf was invoked with the following command
line options:
-stats:1 -exec:maxtput -test:tput -download:10000 -timed:1 -encrypt:0
The first result is from commit 2e0774f without UDP GSO/GRO on the TUN.
[conn][0x55739a144980] STATS: EcnCapable=0 RTT=3973 us
SendTotalPackets=55859 SendSuspectedLostPackets=61
SendSpuriousLostPackets=59 SendCongestionCount=27
SendEcnCongestionCount=0 RecvTotalPackets=2779122
RecvReorderedPackets=0 RecvDroppedPackets=0
RecvDuplicatePackets=0 RecvDecryptionFailures=0
Result: 3654977571 bytes @ 2922821 kbps (10003.972 ms).
The second result is with UDP GSO/GRO on the TUN.
[conn][0x56493dfd09a0] STATS: EcnCapable=0 RTT=1216 us
SendTotalPackets=165033 SendSuspectedLostPackets=64
SendSpuriousLostPackets=61 SendCongestionCount=53
SendEcnCongestionCount=0 RecvTotalPackets=11845268
RecvReorderedPackets=25267 RecvDroppedPackets=0
RecvDuplicatePackets=0 RecvDecryptionFailures=0
Result: 15574671184 bytes @ 12458214 kbps (10001.222 ms).
Signed-off-by: Jordan Whited <jordan@tailscale.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'tun/testdata')
2 files changed, 0 insertions, 16 deletions
diff --git a/tun/testdata/fuzz/Fuzz_handleGRO/032aec0105f26f709c118365e4830d6dc087cab24cd1e154c2e790589a309b77 b/tun/testdata/fuzz/Fuzz_handleGRO/032aec0105f26f709c118365e4830d6dc087cab24cd1e154c2e790589a309b77 deleted file mode 100644 index 5461e79..0000000 --- a/tun/testdata/fuzz/Fuzz_handleGRO/032aec0105f26f709c118365e4830d6dc087cab24cd1e154c2e790589a309b77 +++ /dev/null @@ -1,8 +0,0 @@ -go test fuzz v1 -[]byte("0") -[]byte("0") -[]byte("0") -[]byte("0") -[]byte("0") -[]byte("0") -int(34) diff --git a/tun/testdata/fuzz/Fuzz_handleGRO/0da283f9a2098dec30d1c86784411a8ce2e8e03aa3384105e581f2c67494700d b/tun/testdata/fuzz/Fuzz_handleGRO/0da283f9a2098dec30d1c86784411a8ce2e8e03aa3384105e581f2c67494700d deleted file mode 100644 index b441819..0000000 --- a/tun/testdata/fuzz/Fuzz_handleGRO/0da283f9a2098dec30d1c86784411a8ce2e8e03aa3384105e581f2c67494700d +++ /dev/null @@ -1,8 +0,0 @@ -go test fuzz v1 -[]byte("0") -[]byte("0") -[]byte("0") -[]byte("0") -[]byte("0") -[]byte("0") -int(-48) |