diff options
| author | Andrei Vagin <avagin@google.com> | 2019-10-22 11:54:14 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2019-10-22 11:55:56 -0700 |
| commit | 8720bd643ef37a693984baba83c37458f6691df1 (patch) | |
| tree | 6ec92062890d8e54766026d02ec67601830c4331 /pkg/tcpip/buffer | |
| parent | fb69de696be5d5ebfd427867fe387c2f93845bfa (diff) | |
netstack/tcp: software segmentation offload
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
Diffstat (limited to 'pkg/tcpip/buffer')
| -rw-r--r-- | pkg/tcpip/buffer/prependable.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/pkg/tcpip/buffer/prependable.go b/pkg/tcpip/buffer/prependable.go index 4287464f3..48a2a2713 100644 --- a/pkg/tcpip/buffer/prependable.go +++ b/pkg/tcpip/buffer/prependable.go @@ -41,6 +41,11 @@ func NewPrependableFromView(v View) Prependable { return Prependable{buf: v, usedIdx: 0} } +// NewEmptyPrependableFromView creates a new prependable buffer from a View. +func NewEmptyPrependableFromView(v View) Prependable { + return Prependable{buf: v, usedIdx: len(v)} +} + // View returns a View of the backing buffer that contains all prepended // data so far. func (p Prependable) View() View { |