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PacketBuffers are analogous to Linux's sk_buff. They hold all information about
a packet, headers, and payload. This is important for:
* iptables to access various headers of packets
* Preventing the clutter of passing different net and link headers along with
VectorisedViews to packet handling functions.
This change only affects the incoming packet path, and a future change will
change the outgoing path.
Benchmark Regular PacketBufferPtr PacketBufferConcrete
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BM_Recvmsg 400.715MB/s 373.676MB/s 396.276MB/s
BM_Sendmsg 361.832MB/s 333.003MB/s 335.571MB/s
BM_Recvfrom 453.336MB/s 393.321MB/s 381.650MB/s
BM_Sendto 378.052MB/s 372.134MB/s 341.342MB/s
BM_SendmsgTCP/0/1k 353.711MB/s 316.216MB/s 322.747MB/s
BM_SendmsgTCP/0/2k 600.681MB/s 588.776MB/s 565.050MB/s
BM_SendmsgTCP/0/4k 995.301MB/s 888.808MB/s 941.888MB/s
BM_SendmsgTCP/0/8k 1.517GB/s 1.274GB/s 1.345GB/s
BM_SendmsgTCP/0/16k 1.872GB/s 1.586GB/s 1.698GB/s
BM_SendmsgTCP/0/32k 1.017GB/s 1.020GB/s 1.133GB/s
BM_SendmsgTCP/0/64k 475.626MB/s 584.587MB/s 627.027MB/s
BM_SendmsgTCP/0/128k 416.371MB/s 503.434MB/s 409.850MB/s
BM_SendmsgTCP/0/256k 323.449MB/s 449.599MB/s 388.852MB/s
BM_SendmsgTCP/0/512k 243.992MB/s 267.676MB/s 314.474MB/s
BM_SendmsgTCP/0/1M 95.138MB/s 95.874MB/s 95.417MB/s
BM_SendmsgTCP/0/2M 96.261MB/s 94.977MB/s 96.005MB/s
BM_SendmsgTCP/0/4M 96.512MB/s 95.978MB/s 95.370MB/s
BM_SendmsgTCP/0/8M 95.603MB/s 95.541MB/s 94.935MB/s
BM_SendmsgTCP/0/16M 94.598MB/s 94.696MB/s 94.521MB/s
BM_SendmsgTCP/0/32M 94.006MB/s 94.671MB/s 94.768MB/s
BM_SendmsgTCP/0/64M 94.133MB/s 94.333MB/s 94.746MB/s
BM_SendmsgTCP/0/128M 93.615MB/s 93.497MB/s 93.573MB/s
BM_SendmsgTCP/0/256M 93.241MB/s 95.100MB/s 93.272MB/s
BM_SendmsgTCP/1/1k 303.644MB/s 316.074MB/s 308.430MB/s
BM_SendmsgTCP/1/2k 537.093MB/s 584.962MB/s 529.020MB/s
BM_SendmsgTCP/1/4k 882.362MB/s 939.087MB/s 892.285MB/s
BM_SendmsgTCP/1/8k 1.272GB/s 1.394GB/s 1.296GB/s
BM_SendmsgTCP/1/16k 1.802GB/s 2.019GB/s 1.830GB/s
BM_SendmsgTCP/1/32k 2.084GB/s 2.173GB/s 2.156GB/s
BM_SendmsgTCP/1/64k 2.515GB/s 2.463GB/s 2.473GB/s
BM_SendmsgTCP/1/128k 2.811GB/s 3.004GB/s 2.946GB/s
BM_SendmsgTCP/1/256k 3.008GB/s 3.159GB/s 3.171GB/s
BM_SendmsgTCP/1/512k 2.980GB/s 3.150GB/s 3.126GB/s
BM_SendmsgTCP/1/1M 2.165GB/s 2.233GB/s 2.163GB/s
BM_SendmsgTCP/1/2M 2.370GB/s 2.219GB/s 2.453GB/s
BM_SendmsgTCP/1/4M 2.005GB/s 2.091GB/s 2.214GB/s
BM_SendmsgTCP/1/8M 2.111GB/s 2.013GB/s 2.109GB/s
BM_SendmsgTCP/1/16M 1.902GB/s 1.868GB/s 1.897GB/s
BM_SendmsgTCP/1/32M 1.655GB/s 1.665GB/s 1.635GB/s
BM_SendmsgTCP/1/64M 1.575GB/s 1.547GB/s 1.575GB/s
BM_SendmsgTCP/1/128M 1.524GB/s 1.584GB/s 1.580GB/s
BM_SendmsgTCP/1/256M 1.579GB/s 1.607GB/s 1.593GB/s
PiperOrigin-RevId: 278940079
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When VectorisedViews were passed up the stack from packet_dispatchers, we were
passing a sub-slice of the dispatcher's views fields. The dispatchers then
immediately set those views to nil.
This wasn't caught before because every implementer copied the data in these
views before returning.
PiperOrigin-RevId: 277615351
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Right now, we send each tcp packet separately, we call one system
call per-packet. This patch allows to generate multiple tcp packets
and send them by sendmmsg.
The arguable part of this CL is a way how to handle multiple headers.
This CL adds the next field to the Prepandable buffer.
Nginx test results:
Server Software: nginx/1.15.9
Server Hostname: 10.138.0.2
Server Port: 8080
Document Path: /10m.txt
Document Length: 10485760 bytes
w/o gso:
Concurrency Level: 5
Time taken for tests: 5.491 seconds
Complete requests: 100
Failed requests: 0
Total transferred: 1048600200 bytes
HTML transferred: 1048576000 bytes
Requests per second: 18.21 [#/sec] (mean)
Time per request: 274.525 [ms] (mean)
Time per request: 54.905 [ms] (mean, across all concurrent requests)
Transfer rate: 186508.03 [Kbytes/sec] received
sw-gso:
Concurrency Level: 5
Time taken for tests: 3.852 seconds
Complete requests: 100
Failed requests: 0
Total transferred: 1048600200 bytes
HTML transferred: 1048576000 bytes
Requests per second: 25.96 [#/sec] (mean)
Time per request: 192.576 [ms] (mean)
Time per request: 38.515 [ms] (mean, across all concurrent requests)
Transfer rate: 265874.92 [Kbytes/sec] received
w/o gso:
$ ./tcp_benchmark --client --duration 15 --ideal
[SUM] 0.0-15.1 sec 2.20 GBytes 1.25 Gbits/sec
software gso:
$ tcp_benchmark --client --duration 15 --ideal --gso $((1<<16)) --swgso
[SUM] 0.0-15.1 sec 3.99 GBytes 2.26 Gbits/sec
PiperOrigin-RevId: 276112677
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Like (AF_INET, SOCK_RAW) sockets, AF_PACKET sockets require CAP_NET_RAW. With
runsc, you'll need to pass `--net-raw=true` to enable them.
Binding isn't supported yet.
PiperOrigin-RevId: 275909366
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This can be merged after:
https://github.com/google/gvisor-website/pull/77
or
https://github.com/google/gvisor-website/pull/78
PiperOrigin-RevId: 253132620
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This is in preparation to support an fdbased endpoint that can read/dispatch
packets from multiple underlying fds.
Updates #231
PiperOrigin-RevId: 249337074
Change-Id: Id7d375186cffcf55ae5e38986e7d605a96916d35
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