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  • Rsc at Sep 26, 2012 at 7:33 pm
    *** 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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postedSep 26, '12 at 7:27p
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