FAQ
*** Submitted as
http://code.google.com/p/go/source/detail?r=19cf9361902a ***

net: spread fd over several pollservers.

Lighten contention without preventing further improvements on
pollservers.
Connections are spread over Min(GOMAXPROCS, NumCPU, 8) pollserver
instances.

Median of 10 runs, 4 cores @ 3.4GHz, amd/linux-3.2:

BenchmarkTCPOneShot 171917 ns/op 175194 ns/op
1.91%
BenchmarkTCPOneShot-2 101413 ns/op 109462 ns/op
7.94%
BenchmarkTCPOneShot-4 91796 ns/op 35712 ns/op
-61.10%
BenchmarkTCPOneShot-6 90938 ns/op 30607 ns/op
-66.34%
BenchmarkTCPOneShot-8 90374 ns/op 29150 ns/op
-67.75%
BenchmarkTCPOneShot-16 101089 ns/op 111526 ns/op
10.32%

BenchmarkTCPOneShotTimeout 174986 ns/op 178606 ns/op
2.07%
BenchmarkTCPOneShotTimeout-2 101585 ns/op 110678 ns/op
8.95%
BenchmarkTCPOneShotTimeout-4 91547 ns/op 35931 ns/op
-60.75%
BenchmarkTCPOneShotTimeout-6 91496 ns/op 31019 ns/op
-66.10%
BenchmarkTCPOneShotTimeout-8 90670 ns/op 29531 ns/op
-67.43%
BenchmarkTCPOneShotTimeout-16 101013 ns/op 106026 ns/op
4.96%

BenchmarkTCPPersistent 51731 ns/op 53324 ns/op
3.08%
BenchmarkTCPPersistent-2 32888 ns/op 30678 ns/op
-6.72%
BenchmarkTCPPersistent-4 25751 ns/op 15595 ns/op
-39.44%
BenchmarkTCPPersistent-6 26737 ns/op 9805 ns/op
-63.33%
BenchmarkTCPPersistent-8 26850 ns/op 9730 ns/op
-63.76%
BenchmarkTCPPersistent-16 104449 ns/op 102838 ns/op
-1.54%

BenchmarkTCPPersistentTimeout 51806 ns/op 53281 ns/op
2.85%
BenchmarkTCPPersistentTimeout-2 32956 ns/op 30895 ns/op
-6.25%
BenchmarkTCPPersistentTimeout-4 25994 ns/op 18111 ns/op
-30.33%
BenchmarkTCPPersistentTimeout-6 26679 ns/op 9846 ns/op
-63.09%
BenchmarkTCPPersistentTimeout-8 26810 ns/op 9727 ns/op
-63.72%
BenchmarkTCPPersistentTimeout-16 101652 ns/op 104410 ns/op
2.71%

R=rsc, dvyukov, dave, mikioh.mikioh, bradfitz, remyoudompheng
CC=golang-dev
http://codereview.appspot.com/6496054

Committer: Russ Cox <rsc@golang.org>


http://codereview.appspot.com/6496054/

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