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    SubjectRe: [RFC 0/3] reduce latency of direct async compaction
    On Thu, Dec 03, 2015 at 09:10:44AM +0100, Vlastimil Babka wrote:
    > Aaron, could you try this on your testcase?

    One time result isn't stable enough, so I did 9 runs for each commit,
    here is the result:

    base: 25364a9e54fb8296837061bf684b76d20eec01fb
    head: 7433b1009ff5a02e1e9f3444802daba2cf385d27
    (head = base + this_patch_serie)

    The always-always case(transparent_hugepage set to always and defrag set
    to always):

    Result for base:
    $ cat {0..8}/swap
    cmdline: /lkp/aaron/src/bin/usemem 100000622592
    100000622592 transferred in 103 seconds, throughput: 925 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 99999559680
    99999559680 transferred in 92 seconds, throughput: 1036 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 99996171264
    99996171264 transferred in 92 seconds, throughput: 1036 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100005663744
    100005663744 transferred in 150 seconds, throughput: 635 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100002966528
    100002966528 transferred in 87 seconds, throughput: 1096 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 99995784192
    99995784192 transferred in 131 seconds, throughput: 727 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100003731456
    100003731456 transferred in 97 seconds, throughput: 983 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100006440960
    100006440960 transferred in 109 seconds, throughput: 874 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 99998813184
    99998813184 transferred in 122 seconds, throughput: 781 MB/s
    Max: 1096 MB/s
    Min: 635 MB/s
    Avg: 899 MB/s

    Result for head:
    $ cat {0..8}/swap
    cmdline: /lkp/aaron/src/bin/usemem 100003163136
    100003163136 transferred in 105 seconds, throughput: 908 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 99998524416
    99998524416 transferred in 78 seconds, throughput: 1222 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 99993646080
    99993646080 transferred in 108 seconds, throughput: 882 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 99998936064
    99998936064 transferred in 114 seconds, throughput: 836 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100002204672
    100002204672 transferred in 73 seconds, throughput: 1306 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 99998140416
    99998140416 transferred in 146 seconds, throughput: 653 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100002941952
    100002941952 transferred in 78 seconds, throughput: 1222 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 99996917760
    99996917760 transferred in 109 seconds, throughput: 874 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100001405952
    100001405952 transferred in 96 seconds, throughput: 993 MB/s
    Max: 1306 MB/s
    Min: 653 MB/s
    Avg: 988 MB/s

    Result for v4.3 as a reference:
    $ cat {0..8}/swap
    cmdline: /lkp/aaron/src/bin/usemem 100002459648
    100002459648 transferred in 96 seconds, throughput: 993 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 99997375488
    99997375488 transferred in 96 seconds, throughput: 993 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 99999028224
    99999028224 transferred in 107 seconds, throughput: 891 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100000137216
    100000137216 transferred in 91 seconds, throughput: 1047 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100003835904
    100003835904 transferred in 80 seconds, throughput: 1192 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100000143360
    100000143360 transferred in 96 seconds, throughput: 993 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100020593664
    100020593664 transferred in 101 seconds, throughput: 944 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100005805056
    100005805056 transferred in 87 seconds, throughput: 1096 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100008360960
    100008360960 transferred in 74 seconds, throughput: 1288 MB/s
    Max: 1288 MB/s
    Min: 891 MB/s
    Avg: 1048 MB/s

    The always-never case:

    Result for head:
    $ cat {0..8}/swap
    cmdline: /lkp/aaron/src/bin/usemem 100003940352
    100003940352 transferred in 71 seconds, throughput: 1343 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100007411712
    100007411712 transferred in 62 seconds, throughput: 1538 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100001875968
    100001875968 transferred in 64 seconds, throughput: 1490 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100003912704
    100003912704 transferred in 62 seconds, throughput: 1538 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100002238464
    100002238464 transferred in 66 seconds, throughput: 1444 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100003670016
    100003670016 transferred in 65 seconds, throughput: 1467 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 99998364672
    99998364672 transferred in 68 seconds, throughput: 1402 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100005417984
    100005417984 transferred in 70 seconds, throughput: 1362 MB/s
    cmdline: /lkp/aaron/src/bin/usemem 100005304320
    100005304320 transferred in 64 seconds, throughput: 1490 MB/s
    Max: 1538 MB/s
    Min: 1343 MB/s
    Avg: 1452 MB/s


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