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Message-ID: <20111121071525.GA24937@localhost>
Date:	Mon, 21 Nov 2011 15:15:25 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Trond Myklebust <Trond.Myklebust@...app.com>
Cc:	linux-nfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Feng Tang <feng.tang@...el.com>
Subject: Re: [PATCH] nfs: writeback pages wait queue

> Tests show that it can effectively reduce stalls in the disk-network
> pipeline, improve performance and reduce delays.

For the record, the full stats are listed below.

The attached two figures about NFS server disk/network traffics are
taken from cases

        snb/thresh=1000M/nfs-1dd-1-3.2.0-rc1
        snb/thresh=1000M/nfs-1dd-1-3.2.0-rc1-ioless-full+

The former shows more interleaved disk/network activities (one is
mostly stalled when the other is busy).  While the latter shows more
evenly distributed disk/net bandwidth, both disk/net throughput are
dropping to 0 less often.

Thanks,
Fengguang
---

wfg@bee /export/writeback% ./compare-nfs.sh -g nfs snb/*/{*-3.2.0-rc1,*-3.2.0-rc1-ioless-full+}
               3.2.0-rc1    3.2.0-rc1-ioless-full+
------------------------  ------------------------
                   20.66      +136.7%        48.90  snb/thresh=1000M/nfs-100dd-1-3.2.0-rc1
                   20.82      +147.5%        51.52  snb/thresh=1000M/nfs-100dd-2-3.2.0-rc1
                   20.57      +129.8%        47.26  snb/thresh=1000M/nfs-100dd-3-3.2.0-rc1
                   35.96       +96.5%        70.67  snb/thresh=1000M/nfs-10dd-1-3.2.0-rc1
                   37.47       +89.1%        70.85  snb/thresh=1000M/nfs-10dd-2-3.2.0-rc1
                   34.55      +106.1%        71.21  snb/thresh=1000M/nfs-10dd-3-3.2.0-rc1
                   58.24       +28.2%        74.63  snb/thresh=1000M/nfs-1dd-1-3.2.0-rc1
                   59.83       +18.6%        70.93  snb/thresh=1000M/nfs-1dd-2-3.2.0-rc1
                   58.30       +31.4%        76.61  snb/thresh=1000M/nfs-1dd-3-3.2.0-rc1
                   23.69       -10.0%        21.33  snb/thresh=100M/nfs-100dd-1-3.2.0-rc1
                   23.59        -1.7%        23.19  snb/thresh=100M/nfs-100dd-2-3.2.0-rc1
                   23.94        -1.0%        23.70  snb/thresh=100M/nfs-100dd-3-3.2.0-rc1
                   27.06        -0.0%        27.06  snb/thresh=100M/nfs-10dd-1-3.2.0-rc1
                   25.43        +4.8%        26.66  snb/thresh=100M/nfs-10dd-2-3.2.0-rc1
                   27.21        -0.8%        26.99  snb/thresh=100M/nfs-10dd-3-3.2.0-rc1
                   53.82        +4.4%        56.17  snb/thresh=100M/nfs-1dd-1-3.2.0-rc1
                   55.80        +4.2%        58.12  snb/thresh=100M/nfs-1dd-2-3.2.0-rc1
                   55.75        +2.9%        57.37  snb/thresh=100M/nfs-1dd-3-3.2.0-rc1
                   15.47        +1.3%        15.68  snb/thresh=10M/nfs-10dd-1-3.2.0-rc1
                   16.09        -3.5%        15.53  snb/thresh=10M/nfs-10dd-2-3.2.0-rc1
                   15.09        -0.9%        14.96  snb/thresh=10M/nfs-10dd-3-3.2.0-rc1
                   26.65       +13.0%        30.10  snb/thresh=10M/nfs-1dd-1-3.2.0-rc1
                   25.09        +7.7%        27.02  snb/thresh=10M/nfs-1dd-2-3.2.0-rc1
                   27.16        +3.3%        28.06  snb/thresh=10M/nfs-1dd-3-3.2.0-rc1
                   27.51       +78.6%        49.11  snb/thresh=2G/nfs-100dd-1-3.2.0-rc1
                   22.46      +131.6%        52.01  snb/thresh=2G/nfs-100dd-2-3.2.0-rc1
                   12.95      +289.8%        50.50  snb/thresh=2G/nfs-100dd-3-3.2.0-rc1
                   42.28       +81.0%        76.52  snb/thresh=2G/nfs-10dd-1-3.2.0-rc1
                   40.33       +78.8%        72.10  snb/thresh=2G/nfs-10dd-2-3.2.0-rc1
                   42.52       +67.6%        71.27  snb/thresh=2G/nfs-10dd-3-3.2.0-rc1
                   62.27       +34.6%        83.84  snb/thresh=2G/nfs-1dd-1-3.2.0-rc1
                   60.10       +35.6%        81.48  snb/thresh=2G/nfs-1dd-2-3.2.0-rc1
                   66.29       +17.5%        77.88  snb/thresh=2G/nfs-1dd-3-3.2.0-rc1
                 1164.97       +41.6%      1649.19  TOTAL write_bw

               3.2.0-rc1    3.2.0-rc1-ioless-full+
------------------------  ------------------------
                 2404.00       +67.7%      4031.00  snb/thresh=1000M/nfs-100dd-1-3.2.0-rc1
                 3236.00       +22.6%      3968.00  snb/thresh=1000M/nfs-100dd-2-3.2.0-rc1
                 2435.00      +100.7%      4886.00  snb/thresh=1000M/nfs-100dd-3-3.2.0-rc1
                  415.00      +113.7%       887.00  snb/thresh=1000M/nfs-10dd-1-3.2.0-rc1
                  429.00      +119.6%       942.00  snb/thresh=1000M/nfs-10dd-2-3.2.0-rc1
                  400.00      +127.2%       909.00  snb/thresh=1000M/nfs-10dd-3-3.2.0-rc1
                   72.00       +40.3%       101.00  snb/thresh=1000M/nfs-1dd-1-3.2.0-rc1
                   73.00       +28.8%        94.00  snb/thresh=1000M/nfs-1dd-2-3.2.0-rc1
                   71.00       +47.9%       105.00  snb/thresh=1000M/nfs-1dd-3-3.2.0-rc1
                  455.00      +233.4%      1517.00  snb/thresh=100M/nfs-100dd-1-3.2.0-rc1
                  401.00       -21.7%       314.00  snb/thresh=100M/nfs-100dd-2-3.2.0-rc1
                  390.00        -1.0%       386.00  snb/thresh=100M/nfs-100dd-3-3.2.0-rc1
                 2875.00        -0.6%      2858.00  snb/thresh=100M/nfs-10dd-1-3.2.0-rc1
                 2664.00        +5.9%      2820.00  snb/thresh=100M/nfs-10dd-2-3.2.0-rc1
                 2882.00        -1.8%      2829.00  snb/thresh=100M/nfs-10dd-3-3.2.0-rc1
                  718.00        +5.4%       757.00  snb/thresh=100M/nfs-1dd-1-3.2.0-rc1
                  756.00        +4.8%       792.00  snb/thresh=100M/nfs-1dd-2-3.2.0-rc1
                  756.00        +2.6%       776.00  snb/thresh=100M/nfs-1dd-3-3.2.0-rc1
                 6570.00        +0.1%      6574.00  snb/thresh=10M/nfs-10dd-1-3.2.0-rc1
                 6551.00        -3.8%      6305.00  snb/thresh=10M/nfs-10dd-2-3.2.0-rc1
                 6362.00        -0.0%      6360.00  snb/thresh=10M/nfs-10dd-3-3.2.0-rc1
                 2895.00       +21.2%      3509.00  snb/thresh=10M/nfs-1dd-1-3.2.0-rc1
                 2542.00       +17.2%      2978.00  snb/thresh=10M/nfs-1dd-2-3.2.0-rc1
                 2987.00        +0.3%      2996.00  snb/thresh=10M/nfs-1dd-3-3.2.0-rc1
                 2140.00       +77.6%      3801.00  snb/thresh=2G/nfs-100dd-1-3.2.0-rc1
                 1808.00       +41.2%      2552.00  snb/thresh=2G/nfs-100dd-2-3.2.0-rc1
                  679.00      +293.8%      2674.00  snb/thresh=2G/nfs-100dd-3-3.2.0-rc1
                  241.00      +141.1%       581.00  snb/thresh=2G/nfs-10dd-1-3.2.0-rc1
                  237.00       +97.5%       468.00  snb/thresh=2G/nfs-10dd-2-3.2.0-rc1
                  240.00      +135.4%       565.00  snb/thresh=2G/nfs-10dd-3-3.2.0-rc1
                   41.00       +34.1%        55.00  snb/thresh=2G/nfs-1dd-1-3.2.0-rc1
                   35.00       +65.7%        58.00  snb/thresh=2G/nfs-1dd-2-3.2.0-rc1
                   39.00       +33.3%        52.00  snb/thresh=2G/nfs-1dd-3-3.2.0-rc1
                54799.00       +25.0%     68500.00  TOTAL nfs_nr_commits

               3.2.0-rc1    3.2.0-rc1-ioless-full+
------------------------  ------------------------
                40601.00       -14.0%     34925.00  snb/thresh=1000M/nfs-100dd-1-3.2.0-rc1
                41859.00       -12.2%     36761.00  snb/thresh=1000M/nfs-100dd-2-3.2.0-rc1
                39947.00       -15.1%     33897.00  snb/thresh=1000M/nfs-100dd-3-3.2.0-rc1
               153398.00       -72.0%     42898.00  snb/thresh=1000M/nfs-10dd-1-3.2.0-rc1
               149928.00       -65.0%     52422.00  snb/thresh=1000M/nfs-10dd-2-3.2.0-rc1
               118064.00       -59.6%     47707.00  snb/thresh=1000M/nfs-10dd-3-3.2.0-rc1
               102626.00       +78.2%    182853.00  snb/thresh=1000M/nfs-1dd-1-3.2.0-rc1
               111743.00       +81.4%    202708.00  snb/thresh=1000M/nfs-1dd-2-3.2.0-rc1
                91838.00      +107.1%    190184.00  snb/thresh=1000M/nfs-1dd-3-3.2.0-rc1
                35016.00       +16.7%     40874.00  snb/thresh=100M/nfs-100dd-1-3.2.0-rc1
                34778.00        -2.3%     33981.00  snb/thresh=100M/nfs-100dd-2-3.2.0-rc1
                35749.00        -1.7%     35131.00  snb/thresh=100M/nfs-100dd-3-3.2.0-rc1
               104527.00        -7.4%     96761.00  snb/thresh=100M/nfs-10dd-1-3.2.0-rc1
                91568.00        +6.5%     97506.00  snb/thresh=100M/nfs-10dd-2-3.2.0-rc1
                99681.00        -5.1%     94596.00  snb/thresh=100M/nfs-10dd-3-3.2.0-rc1
               208450.00        -1.0%    206384.00  snb/thresh=100M/nfs-1dd-1-3.2.0-rc1
               205944.00       +12.2%    231073.00  snb/thresh=100M/nfs-1dd-2-3.2.0-rc1
               190945.00       +21.8%    232662.00  snb/thresh=100M/nfs-1dd-3-3.2.0-rc1
                71042.00        -0.1%     70937.00  snb/thresh=10M/nfs-10dd-1-3.2.0-rc1
                71398.00        -3.2%     69148.00  snb/thresh=10M/nfs-10dd-2-3.2.0-rc1
                70247.00        -1.1%     69504.00  snb/thresh=10M/nfs-10dd-3-3.2.0-rc1
               142168.00       +35.0%    191905.00  snb/thresh=10M/nfs-1dd-1-3.2.0-rc1
               116012.00       +18.7%    137664.00  snb/thresh=10M/nfs-1dd-2-3.2.0-rc1
               145534.00        +5.6%    153619.00  snb/thresh=10M/nfs-1dd-3-3.2.0-rc1
                67785.00       -39.1%     41269.00  snb/thresh=2G/nfs-100dd-1-3.2.0-rc1
                53151.00       -20.1%     42471.00  snb/thresh=2G/nfs-100dd-2-3.2.0-rc1
                73200.00       -39.9%     43988.00  snb/thresh=2G/nfs-100dd-3-3.2.0-rc1
               188725.00       -57.4%     80357.00  snb/thresh=2G/nfs-10dd-1-3.2.0-rc1
               176809.00       -75.0%     44204.00  snb/thresh=2G/nfs-10dd-2-3.2.0-rc1
               173292.00       -44.2%     96636.00  snb/thresh=2G/nfs-10dd-3-3.2.0-rc1
                96940.00       +76.7%    171281.00  snb/thresh=2G/nfs-1dd-1-3.2.0-rc1
               111572.00       +36.3%    152049.00  snb/thresh=2G/nfs-1dd-2-3.2.0-rc1
               128726.00       +29.8%    167063.00  snb/thresh=2G/nfs-1dd-3-3.2.0-rc1
              3543263.00        -3.3%   3425418.00  TOTAL nfs_nr_writes

               3.2.0-rc1    3.2.0-rc1-ioless-full+
------------------------  ------------------------
                    5.56       +44.9%         8.06  snb/thresh=1000M/nfs-100dd-1-3.2.0-rc1
                    4.14      +109.1%         8.67  snb/thresh=1000M/nfs-100dd-2-3.2.0-rc1
                    5.46       +16.3%         6.35  snb/thresh=1000M/nfs-100dd-3-3.2.0-rc1
                   52.04        -8.4%        47.70  snb/thresh=1000M/nfs-10dd-1-3.2.0-rc1
                   52.33       -13.8%        45.09  snb/thresh=1000M/nfs-10dd-2-3.2.0-rc1
                   51.72        -9.2%        46.98  snb/thresh=1000M/nfs-10dd-3-3.2.0-rc1
                  484.63        -8.6%       443.16  snb/thresh=1000M/nfs-1dd-1-3.2.0-rc1
                  492.42        -8.2%       452.26  snb/thresh=1000M/nfs-1dd-2-3.2.0-rc1
                  493.13       -11.4%       437.15  snb/thresh=1000M/nfs-1dd-3-3.2.0-rc1
                   32.52       -72.9%         8.80  snb/thresh=100M/nfs-100dd-1-3.2.0-rc1
                   36.15       +26.1%        45.58  snb/thresh=100M/nfs-100dd-2-3.2.0-rc1
                   38.33        +0.4%        38.49  snb/thresh=100M/nfs-100dd-3-3.2.0-rc1
                    5.67        +0.5%         5.69  snb/thresh=100M/nfs-10dd-1-3.2.0-rc1
                    5.74        -1.1%         5.68  snb/thresh=100M/nfs-10dd-2-3.2.0-rc1
                    5.69        +0.9%         5.74  snb/thresh=100M/nfs-10dd-3-3.2.0-rc1
                   44.91        -1.0%        44.45  snb/thresh=100M/nfs-1dd-1-3.2.0-rc1
                   44.22        -0.6%        43.96  snb/thresh=100M/nfs-1dd-2-3.2.0-rc1
                   44.18        +0.2%        44.28  snb/thresh=100M/nfs-1dd-3-3.2.0-rc1
                    1.42        +1.1%         1.43  snb/thresh=10M/nfs-10dd-1-3.2.0-rc1
                    1.48        +0.3%         1.48  snb/thresh=10M/nfs-10dd-2-3.2.0-rc1
                    1.43        -1.0%         1.42  snb/thresh=10M/nfs-10dd-3-3.2.0-rc1
                    5.51        -6.8%         5.14  snb/thresh=10M/nfs-1dd-1-3.2.0-rc1
                    5.91        -8.1%         5.43  snb/thresh=10M/nfs-1dd-2-3.2.0-rc1
                    5.44        +3.0%         5.61  snb/thresh=10M/nfs-1dd-3-3.2.0-rc1
                    8.80        +6.6%         9.38  snb/thresh=2G/nfs-100dd-1-3.2.0-rc1
                    8.51       +65.2%        14.06  snb/thresh=2G/nfs-100dd-2-3.2.0-rc1
                   15.28       -13.2%        13.27  snb/thresh=2G/nfs-100dd-3-3.2.0-rc1
                  105.12       -24.9%        78.99  snb/thresh=2G/nfs-10dd-1-3.2.0-rc1
                  101.90        -9.1%        92.60  snb/thresh=2G/nfs-10dd-2-3.2.0-rc1
                  106.24       -29.7%        74.65  snb/thresh=2G/nfs-10dd-3-3.2.0-rc1
                  909.85        +0.4%       913.68  snb/thresh=2G/nfs-1dd-1-3.2.0-rc1
                 1030.45       -18.3%       841.68  snb/thresh=2G/nfs-1dd-2-3.2.0-rc1
                 1016.56       -11.6%       898.36  snb/thresh=2G/nfs-1dd-3-3.2.0-rc1
                 5222.74       -10.1%      4695.25  TOTAL nfs_commit_size

               3.2.0-rc1    3.2.0-rc1-ioless-full+
------------------------  ------------------------
                    0.33      +182.4%         0.93  snb/thresh=1000M/nfs-100dd-1-3.2.0-rc1
                    0.32      +192.0%         0.94  snb/thresh=1000M/nfs-100dd-2-3.2.0-rc1
                    0.33      +175.1%         0.91  snb/thresh=1000M/nfs-100dd-3-3.2.0-rc1
                    0.14      +600.4%         0.99  snb/thresh=1000M/nfs-10dd-1-3.2.0-rc1
                    0.15      +441.1%         0.81  snb/thresh=1000M/nfs-10dd-2-3.2.0-rc1
                    0.18      +410.8%         0.90  snb/thresh=1000M/nfs-10dd-3-3.2.0-rc1
                    0.34       -28.0%         0.24  snb/thresh=1000M/nfs-1dd-1-3.2.0-rc1
                    0.32       -34.8%         0.21  snb/thresh=1000M/nfs-1dd-2-3.2.0-rc1
                    0.38       -36.7%         0.24  snb/thresh=1000M/nfs-1dd-3-3.2.0-rc1
                    0.42       -22.7%         0.33  snb/thresh=100M/nfs-100dd-1-3.2.0-rc1
                    0.42        +1.0%         0.42  snb/thresh=100M/nfs-100dd-2-3.2.0-rc1
                    0.42        +1.1%         0.42  snb/thresh=100M/nfs-100dd-3-3.2.0-rc1
                    0.16        +7.9%         0.17  snb/thresh=100M/nfs-10dd-1-3.2.0-rc1
                    0.17        -1.6%         0.16  snb/thresh=100M/nfs-10dd-2-3.2.0-rc1
                    0.16        +4.4%         0.17  snb/thresh=100M/nfs-10dd-3-3.2.0-rc1
                    0.15        +5.4%         0.16  snb/thresh=100M/nfs-1dd-1-3.2.0-rc1
                    0.16        -7.2%         0.15  snb/thresh=100M/nfs-1dd-2-3.2.0-rc1
                    0.17       -15.6%         0.15  snb/thresh=100M/nfs-1dd-3-3.2.0-rc1
                    0.13        +1.3%         0.13  snb/thresh=10M/nfs-10dd-1-3.2.0-rc1
                    0.14        -0.3%         0.14  snb/thresh=10M/nfs-10dd-2-3.2.0-rc1
                    0.13        +0.0%         0.13  snb/thresh=10M/nfs-10dd-3-3.2.0-rc1
                    0.11       -16.4%         0.09  snb/thresh=10M/nfs-1dd-1-3.2.0-rc1
                    0.13        -9.3%         0.12  snb/thresh=10M/nfs-1dd-2-3.2.0-rc1
                    0.11        -2.2%         0.11  snb/thresh=10M/nfs-1dd-3-3.2.0-rc1
                    0.28      +210.9%         0.86  snb/thresh=2G/nfs-100dd-1-3.2.0-rc1
                    0.29      +191.9%         0.85  snb/thresh=2G/nfs-100dd-2-3.2.0-rc1
                    0.14      +469.1%         0.81  snb/thresh=2G/nfs-100dd-3-3.2.0-rc1
                    0.13      +325.5%         0.57  snb/thresh=2G/nfs-10dd-1-3.2.0-rc1
                    0.14      +617.7%         0.98  snb/thresh=2G/nfs-10dd-2-3.2.0-rc1
                    0.15      +196.6%         0.44  snb/thresh=2G/nfs-10dd-3-3.2.0-rc1
                    0.38       -23.8%         0.29  snb/thresh=2G/nfs-1dd-1-3.2.0-rc1
                    0.32        -0.7%         0.32  snb/thresh=2G/nfs-1dd-2-3.2.0-rc1
                    0.31        -9.2%         0.28  snb/thresh=2G/nfs-1dd-3-3.2.0-rc1
                    7.62       +89.2%        14.42  TOTAL nfs_write_size

               3.2.0-rc1    3.2.0-rc1-ioless-full+
------------------------  ------------------------
                90226.82       -99.9%        92.07  snb/thresh=1000M/nfs-100dd-1-3.2.0-rc1
                88904.27       -99.9%        80.21  snb/thresh=1000M/nfs-100dd-2-3.2.0-rc1
                97436.73       -99.9%        87.32  snb/thresh=1000M/nfs-100dd-3-3.2.0-rc1
                62167.19       -99.3%       444.25  snb/thresh=1000M/nfs-10dd-1-3.2.0-rc1
                64150.34       -99.2%       539.38  snb/thresh=1000M/nfs-10dd-2-3.2.0-rc1
                78675.54       -99.3%       540.27  snb/thresh=1000M/nfs-10dd-3-3.2.0-rc1
                 5372.84       +57.8%      8477.45  snb/thresh=1000M/nfs-1dd-1-3.2.0-rc1
                10245.66       -51.2%      4995.71  snb/thresh=1000M/nfs-1dd-2-3.2.0-rc1
                 4744.06      +109.1%      9919.55  snb/thresh=1000M/nfs-1dd-3-3.2.0-rc1
                 1727.29        -9.6%      1562.16  snb/thresh=100M/nfs-100dd-1-3.2.0-rc1
                 2183.49        +4.4%      2280.21  snb/thresh=100M/nfs-100dd-2-3.2.0-rc1
                 2201.49        +3.7%      2281.92  snb/thresh=100M/nfs-100dd-3-3.2.0-rc1
                 6213.73       +19.9%      7448.13  snb/thresh=100M/nfs-10dd-1-3.2.0-rc1
                 8127.01        +3.2%      8387.06  snb/thresh=100M/nfs-10dd-2-3.2.0-rc1
                 7255.35        +4.4%      7571.11  snb/thresh=100M/nfs-10dd-3-3.2.0-rc1
                 1144.67       +20.4%      1378.01  snb/thresh=100M/nfs-1dd-1-3.2.0-rc1
                 1010.02       +19.0%      1202.22  snb/thresh=100M/nfs-1dd-2-3.2.0-rc1
                  906.33       +15.8%      1049.76  snb/thresh=100M/nfs-1dd-3-3.2.0-rc1
                  642.82       +17.3%       753.80  snb/thresh=10M/nfs-10dd-1-3.2.0-rc1
                  766.82       -21.7%       600.18  snb/thresh=10M/nfs-10dd-2-3.2.0-rc1
                  575.95       +16.5%       670.85  snb/thresh=10M/nfs-10dd-3-3.2.0-rc1
                   21.91       +71.0%        37.47  snb/thresh=10M/nfs-1dd-1-3.2.0-rc1
                   16.70      +105.3%        34.29  snb/thresh=10M/nfs-1dd-2-3.2.0-rc1
                   19.05       -71.3%         5.47  snb/thresh=10M/nfs-1dd-3-3.2.0-rc1
               123877.11       -99.0%      1187.27  snb/thresh=2G/nfs-100dd-1-3.2.0-rc1
               122353.65       -98.8%      1505.84  snb/thresh=2G/nfs-100dd-2-3.2.0-rc1
               101140.82       -98.4%      1641.03  snb/thresh=2G/nfs-100dd-3-3.2.0-rc1
                78248.51       -98.9%       892.00  snb/thresh=2G/nfs-10dd-1-3.2.0-rc1
                84589.42       -98.6%      1212.17  snb/thresh=2G/nfs-10dd-2-3.2.0-rc1
                89684.95       -99.4%       495.28  snb/thresh=2G/nfs-10dd-3-3.2.0-rc1
                10405.39        -6.9%      9684.57  snb/thresh=2G/nfs-1dd-1-3.2.0-rc1
                16151.86       -48.5%      8316.69  snb/thresh=2G/nfs-1dd-2-3.2.0-rc1
                16119.17       -49.0%      8214.84  snb/thresh=2G/nfs-1dd-3-3.2.0-rc1
              1177306.98       -92.1%     93588.50  TOTAL nfs_write_queue_time

               3.2.0-rc1    3.2.0-rc1-ioless-full+
------------------------  ------------------------
                  316.90       -56.7%       137.37  snb/thresh=1000M/nfs-100dd-1-3.2.0-rc1
                  279.71       -55.0%       125.88  snb/thresh=1000M/nfs-100dd-2-3.2.0-rc1
                  328.22       -63.4%       120.29  snb/thresh=1000M/nfs-100dd-3-3.2.0-rc1
                  152.06       -45.7%        82.53  snb/thresh=1000M/nfs-10dd-1-3.2.0-rc1
                  159.06       -52.7%        75.25  snb/thresh=1000M/nfs-10dd-2-3.2.0-rc1
                  192.96       -59.0%        79.16  snb/thresh=1000M/nfs-10dd-3-3.2.0-rc1
                   35.55       -21.2%        28.02  snb/thresh=1000M/nfs-1dd-1-3.2.0-rc1
                   33.14       -32.9%        22.24  snb/thresh=1000M/nfs-1dd-2-3.2.0-rc1
                   31.55       -11.1%        28.06  snb/thresh=1000M/nfs-1dd-3-3.2.0-rc1
                  446.92        +3.2%       461.33  snb/thresh=100M/nfs-100dd-1-3.2.0-rc1
                  403.82       +12.8%       455.34  snb/thresh=100M/nfs-100dd-2-3.2.0-rc1
                  410.66        +5.3%       432.30  snb/thresh=100M/nfs-100dd-3-3.2.0-rc1
                  347.30        +3.8%       360.34  snb/thresh=100M/nfs-10dd-1-3.2.0-rc1
                  372.89        -7.4%       345.26  snb/thresh=100M/nfs-10dd-2-3.2.0-rc1
                  352.98        +2.0%       360.11  snb/thresh=100M/nfs-10dd-3-3.2.0-rc1
                   25.22       +18.9%        29.99  snb/thresh=100M/nfs-1dd-1-3.2.0-rc1
                   21.90        +7.6%        23.57  snb/thresh=100M/nfs-1dd-2-3.2.0-rc1
                   23.49        -7.2%        21.79  snb/thresh=100M/nfs-1dd-3-3.2.0-rc1
                  286.86        +0.4%       288.09  snb/thresh=10M/nfs-10dd-1-3.2.0-rc1
                  288.38        +5.5%       304.22  snb/thresh=10M/nfs-10dd-2-3.2.0-rc1
                  299.92        +1.0%       302.95  snb/thresh=10M/nfs-10dd-3-3.2.0-rc1
                   74.81       -37.8%        46.53  snb/thresh=10M/nfs-1dd-1-3.2.0-rc1
                  106.27       -23.8%        81.03  snb/thresh=10M/nfs-1dd-2-3.2.0-rc1
                   76.47        -6.5%        71.48  snb/thresh=10M/nfs-1dd-3-3.2.0-rc1
                  175.97        -9.8%       158.73  snb/thresh=2G/nfs-100dd-1-3.2.0-rc1
                  190.32       -11.5%       168.43  snb/thresh=2G/nfs-100dd-2-3.2.0-rc1
                   81.29       +99.2%       161.97  snb/thresh=2G/nfs-100dd-3-3.2.0-rc1
                  104.98       -58.2%        43.89  snb/thresh=2G/nfs-10dd-1-3.2.0-rc1
                  119.66       -42.3%        68.99  snb/thresh=2G/nfs-10dd-2-3.2.0-rc1
                  126.88       -65.9%        43.32  snb/thresh=2G/nfs-10dd-3-3.2.0-rc1
                   62.43       -53.5%        29.04  snb/thresh=2G/nfs-1dd-1-3.2.0-rc1
                   28.99        +8.7%        31.50  snb/thresh=2G/nfs-1dd-2-3.2.0-rc1
                   19.47       +55.9%        30.37  snb/thresh=2G/nfs-1dd-3-3.2.0-rc1
                 5977.02       -16.0%      5019.34  TOTAL nfs_write_rtt_time

               3.2.0-rc1    3.2.0-rc1-ioless-full+
------------------------  ------------------------
                90545.77       -99.7%       229.94  snb/thresh=1000M/nfs-100dd-1-3.2.0-rc1
                89185.97       -99.8%       206.68  snb/thresh=1000M/nfs-100dd-2-3.2.0-rc1
                97766.88       -99.8%       208.12  snb/thresh=1000M/nfs-100dd-3-3.2.0-rc1
                62320.35       -99.2%       528.28  snb/thresh=1000M/nfs-10dd-1-3.2.0-rc1
                64310.52       -99.0%       615.99  snb/thresh=1000M/nfs-10dd-2-3.2.0-rc1
                78869.77       -99.2%       620.86  snb/thresh=1000M/nfs-10dd-3-3.2.0-rc1
                 5416.77       +57.1%      8508.91  snb/thresh=1000M/nfs-1dd-1-3.2.0-rc1
                10286.87       -51.2%      5021.39  snb/thresh=1000M/nfs-1dd-2-3.2.0-rc1
                 4784.53      +108.0%      9950.05  snb/thresh=1000M/nfs-1dd-3-3.2.0-rc1
                 2174.34        -6.9%      2023.56  snb/thresh=100M/nfs-100dd-1-3.2.0-rc1
                 2587.44        +5.7%      2735.64  snb/thresh=100M/nfs-100dd-2-3.2.0-rc1
                 2612.29        +3.9%      2714.30  snb/thresh=100M/nfs-100dd-3-3.2.0-rc1
                 6561.24       +19.0%      7808.62  snb/thresh=100M/nfs-10dd-1-3.2.0-rc1
                 8500.09        +2.7%      8732.45  snb/thresh=100M/nfs-10dd-2-3.2.0-rc1
                 7608.54        +4.2%      7931.36  snb/thresh=100M/nfs-10dd-3-3.2.0-rc1
                 1171.48       +20.3%      1408.94  snb/thresh=100M/nfs-1dd-1-3.2.0-rc1
                 1033.75       +18.7%      1226.79  snb/thresh=100M/nfs-1dd-2-3.2.0-rc1
                  931.62       +15.1%      1072.45  snb/thresh=100M/nfs-1dd-3-3.2.0-rc1
                  929.77       +12.1%      1041.98  snb/thresh=10M/nfs-10dd-1-3.2.0-rc1
                 1055.30       -14.3%       904.49  snb/thresh=10M/nfs-10dd-2-3.2.0-rc1
                  875.95       +11.2%       973.88  snb/thresh=10M/nfs-10dd-3-3.2.0-rc1
                   96.80       -13.1%        84.09  snb/thresh=10M/nfs-1dd-1-3.2.0-rc1
                  123.09        -6.2%       115.40  snb/thresh=10M/nfs-1dd-2-3.2.0-rc1
                   95.61       -19.4%        77.06  snb/thresh=10M/nfs-1dd-3-3.2.0-rc1
               124054.85       -98.9%      1346.78  snb/thresh=2G/nfs-100dd-1-3.2.0-rc1
               122545.76       -98.6%      1674.99  snb/thresh=2G/nfs-100dd-2-3.2.0-rc1
               101222.98       -98.2%      1803.76  snb/thresh=2G/nfs-100dd-3-3.2.0-rc1
                78354.75       -98.8%       937.22  snb/thresh=2G/nfs-10dd-1-3.2.0-rc1
                84710.46       -98.5%      1283.06  snb/thresh=2G/nfs-10dd-2-3.2.0-rc1
                89813.36       -99.4%       540.01  snb/thresh=2G/nfs-10dd-3-3.2.0-rc1
                10476.93        -7.3%      9717.35  snb/thresh=2G/nfs-1dd-1-3.2.0-rc1
                16189.55       -48.4%      8351.81  snb/thresh=2G/nfs-1dd-2-3.2.0-rc1
                16146.79       -48.9%      8249.52  snb/thresh=2G/nfs-1dd-3-3.2.0-rc1
              1183360.15       -91.7%     98645.74  TOTAL nfs_write_execute_time

               3.2.0-rc1    3.2.0-rc1-ioless-full+
------------------------  ------------------------
                 2262.68       -97.0%        68.18  snb/thresh=1000M/nfs-100dd-1-3.2.0-rc1
                 1794.04       -99.5%         8.96  snb/thresh=1000M/nfs-100dd-2-3.2.0-rc1
                 2128.07       -95.2%       101.40  snb/thresh=1000M/nfs-100dd-3-3.2.0-rc1
                 1614.18       -96.3%        60.53  snb/thresh=1000M/nfs-10dd-1-3.2.0-rc1
                 1764.72       -94.3%       100.35  snb/thresh=1000M/nfs-10dd-2-3.2.0-rc1
                 1602.32       -97.7%        37.01  snb/thresh=1000M/nfs-10dd-3-3.2.0-rc1
                 2000.24       -72.6%       548.77  snb/thresh=1000M/nfs-1dd-1-3.2.0-rc1
                 2028.37       -69.5%       619.40  snb/thresh=1000M/nfs-1dd-2-3.2.0-rc1
                 2114.61       -80.3%       417.26  snb/thresh=1000M/nfs-1dd-3-3.2.0-rc1
                  195.97       -35.4%       126.53  snb/thresh=100M/nfs-100dd-1-3.2.0-rc1
                  158.77        +9.6%       173.97  snb/thresh=100M/nfs-100dd-2-3.2.0-rc1
                  140.91       +40.0%       197.30  snb/thresh=100M/nfs-100dd-3-3.2.0-rc1
                   36.36        -6.1%        34.14  snb/thresh=100M/nfs-10dd-1-3.2.0-rc1
                   39.42        -9.9%        35.51  snb/thresh=100M/nfs-10dd-2-3.2.0-rc1
                   38.72       -16.9%        32.19  snb/thresh=100M/nfs-10dd-3-3.2.0-rc1
                   97.43       -17.2%        80.69  snb/thresh=100M/nfs-1dd-1-3.2.0-rc1
                   96.45       -20.6%        76.63  snb/thresh=100M/nfs-1dd-2-3.2.0-rc1
                  102.16       -25.3%        76.35  snb/thresh=100M/nfs-1dd-3-3.2.0-rc1
                    2.99        -2.0%         2.94  snb/thresh=10M/nfs-10dd-1-3.2.0-rc1
                    1.61        -0.9%         1.60  snb/thresh=10M/nfs-10dd-2-3.2.0-rc1
                    1.40       -13.4%         1.21  snb/thresh=10M/nfs-10dd-3-3.2.0-rc1
                    1.56        -3.3%         1.51  snb/thresh=10M/nfs-1dd-1-3.2.0-rc1
                    1.65        -0.6%         1.64  snb/thresh=10M/nfs-1dd-2-3.2.0-rc1
                    1.69        +9.3%         1.85  snb/thresh=10M/nfs-1dd-3-3.2.0-rc1
                 4122.75       -57.5%      1750.85  snb/thresh=2G/nfs-100dd-1-3.2.0-rc1
                 3385.95       +25.5%      4249.51  snb/thresh=2G/nfs-100dd-2-3.2.0-rc1
                 4023.74       +14.6%      4611.05  snb/thresh=2G/nfs-100dd-3-3.2.0-rc1
                 3242.20       -62.2%      1226.57  snb/thresh=2G/nfs-10dd-1-3.2.0-rc1
                 2961.05       -74.8%       745.85  snb/thresh=2G/nfs-10dd-2-3.2.0-rc1
                 3666.47       -71.1%      1059.87  snb/thresh=2G/nfs-10dd-3-3.2.0-rc1
                 3438.00       -78.1%       753.51  snb/thresh=2G/nfs-1dd-1-3.2.0-rc1
                 4524.00       -79.2%       940.24  snb/thresh=2G/nfs-1dd-2-3.2.0-rc1
                 3596.13       -71.4%      1027.63  snb/thresh=2G/nfs-1dd-3-3.2.0-rc1
                51186.59       -62.5%     19170.98  TOTAL nfs_commit_queue_time

               3.2.0-rc1    3.2.0-rc1-ioless-full+
------------------------  ------------------------
                 1860.87       -31.5%      1274.40  snb/thresh=1000M/nfs-100dd-1-3.2.0-rc1
                 1758.72       -26.6%      1291.19  snb/thresh=1000M/nfs-100dd-2-3.2.0-rc1
                 1906.15       -45.9%      1030.96  snb/thresh=1000M/nfs-100dd-3-3.2.0-rc1
                 3905.95       +11.3%      4349.24  snb/thresh=1000M/nfs-10dd-1-3.2.0-rc1
                 3863.32        +2.7%      3968.57  snb/thresh=1000M/nfs-10dd-2-3.2.0-rc1
                 3698.44       +11.0%      4103.96  snb/thresh=1000M/nfs-10dd-3-3.2.0-rc1
                 4080.74        +7.1%      4372.00  snb/thresh=1000M/nfs-1dd-1-3.2.0-rc1
                 3861.75       +21.1%      4674.71  snb/thresh=1000M/nfs-1dd-2-3.2.0-rc1
                 3844.38       +13.9%      4377.59  snb/thresh=1000M/nfs-1dd-3-3.2.0-rc1
                  389.74       +16.8%       455.39  snb/thresh=100M/nfs-100dd-1-3.2.0-rc1
                  348.41       +15.1%       400.95  snb/thresh=100M/nfs-100dd-2-3.2.0-rc1
                  360.80        +6.6%       384.70  snb/thresh=100M/nfs-100dd-3-3.2.0-rc1
                  846.22        -0.9%       838.24  snb/thresh=100M/nfs-10dd-1-3.2.0-rc1
                  878.63        -2.7%       854.63  snb/thresh=100M/nfs-10dd-2-3.2.0-rc1
                  836.37        +0.5%       840.59  snb/thresh=100M/nfs-10dd-3-3.2.0-rc1
                  530.48        +0.5%       533.08  snb/thresh=100M/nfs-1dd-1-3.2.0-rc1
                  521.77        +2.8%       536.20  snb/thresh=100M/nfs-1dd-2-3.2.0-rc1
                  518.10        +2.9%       532.87  snb/thresh=100M/nfs-1dd-3-3.2.0-rc1
                  238.28        +3.4%       246.32  snb/thresh=10M/nfs-10dd-1-3.2.0-rc1
                  238.98        +8.7%       259.86  snb/thresh=10M/nfs-10dd-2-3.2.0-rc1
                  254.25        -1.2%       251.15  snb/thresh=10M/nfs-10dd-3-3.2.0-rc1
                  135.25        +1.5%       137.26  snb/thresh=10M/nfs-1dd-1-3.2.0-rc1
                  139.34        -4.3%       133.34  snb/thresh=10M/nfs-1dd-2-3.2.0-rc1
                  136.72        +0.6%       137.48  snb/thresh=10M/nfs-1dd-3-3.2.0-rc1
                 1712.95        -8.8%      1562.92  snb/thresh=2G/nfs-100dd-1-3.2.0-rc1
                 1521.25       +36.5%      2076.59  snb/thresh=2G/nfs-100dd-2-3.2.0-rc1
                 1437.56       +34.1%      1927.87  snb/thresh=2G/nfs-100dd-3-3.2.0-rc1
                 8110.66       -32.3%      5493.17  snb/thresh=2G/nfs-10dd-1-3.2.0-rc1
                 8286.49       -13.1%      7202.22  snb/thresh=2G/nfs-10dd-2-3.2.0-rc1
                 6623.11       -16.5%      5532.38  snb/thresh=2G/nfs-10dd-3-3.2.0-rc1
                 5219.90       +65.6%      8644.65  snb/thresh=2G/nfs-1dd-1-3.2.0-rc1
                 6789.74       +14.3%      7758.48  snb/thresh=2G/nfs-1dd-2-3.2.0-rc1
                 6945.82       +23.1%      8552.21  snb/thresh=2G/nfs-1dd-3-3.2.0-rc1
                81801.14        +3.6%     84735.19  TOTAL nfs_commit_rtt_time

               3.2.0-rc1    3.2.0-rc1-ioless-full+
------------------------  ------------------------
                 4123.94       -67.4%      1342.77  snb/thresh=1000M/nfs-100dd-1-3.2.0-rc1
                 3553.22       -63.4%      1300.47  snb/thresh=1000M/nfs-100dd-2-3.2.0-rc1
                 4034.69       -71.9%      1132.59  snb/thresh=1000M/nfs-100dd-3-3.2.0-rc1
                 5521.41       -20.1%      4411.29  snb/thresh=1000M/nfs-10dd-1-3.2.0-rc1
                 5629.16       -27.7%      4070.70  snb/thresh=1000M/nfs-10dd-2-3.2.0-rc1
                 5302.14       -21.9%      4142.63  snb/thresh=1000M/nfs-10dd-3-3.2.0-rc1
                 6082.58       -19.1%      4921.35  snb/thresh=1000M/nfs-1dd-1-3.2.0-rc1
                 5890.41       -10.1%      5294.47  snb/thresh=1000M/nfs-1dd-2-3.2.0-rc1
                 5960.49       -19.5%      4795.47  snb/thresh=1000M/nfs-1dd-3-3.2.0-rc1
                  585.80        -0.6%       582.04  snb/thresh=100M/nfs-100dd-1-3.2.0-rc1
                  507.32       +13.3%       575.00  snb/thresh=100M/nfs-100dd-2-3.2.0-rc1
                  501.85       +16.0%       582.10  snb/thresh=100M/nfs-100dd-3-3.2.0-rc1
                  882.89        -1.2%       872.69  snb/thresh=100M/nfs-10dd-1-3.2.0-rc1
                  918.37        -3.0%       890.44  snb/thresh=100M/nfs-10dd-2-3.2.0-rc1
                  875.43        -0.3%       873.07  snb/thresh=100M/nfs-10dd-3-3.2.0-rc1
                  628.33        -2.3%       613.90  snb/thresh=100M/nfs-1dd-1-3.2.0-rc1
                  618.86        -1.0%       612.97  snb/thresh=100M/nfs-1dd-2-3.2.0-rc1
                  620.76        -1.8%       609.36  snb/thresh=100M/nfs-1dd-3-3.2.0-rc1
                  241.39        +3.3%       249.35  snb/thresh=10M/nfs-10dd-1-3.2.0-rc1
                  240.69        +8.7%       261.56  snb/thresh=10M/nfs-10dd-2-3.2.0-rc1
                  255.75        -1.3%       252.45  snb/thresh=10M/nfs-10dd-3-3.2.0-rc1
                  136.85        +1.4%       138.79  snb/thresh=10M/nfs-1dd-1-3.2.0-rc1
                  141.03        -4.3%       135.01  snb/thresh=10M/nfs-1dd-2-3.2.0-rc1
                  138.44        +0.7%       139.36  snb/thresh=10M/nfs-1dd-3-3.2.0-rc1
                 5836.33       -43.2%      3314.23  snb/thresh=2G/nfs-100dd-1-3.2.0-rc1
                 4907.99       +28.9%      6326.79  snb/thresh=2G/nfs-100dd-2-3.2.0-rc1
                 5462.84       +19.7%      6539.49  snb/thresh=2G/nfs-100dd-3-3.2.0-rc1
                11355.59       -40.8%      6723.06  snb/thresh=2G/nfs-10dd-1-3.2.0-rc1
                11250.64       -29.3%      7950.03  snb/thresh=2G/nfs-10dd-2-3.2.0-rc1
                10293.16       -35.9%      6594.40  snb/thresh=2G/nfs-10dd-3-3.2.0-rc1
                 8658.85        +8.5%      9398.44  snb/thresh=2G/nfs-1dd-1-3.2.0-rc1
                11314.40       -23.1%      8699.43  snb/thresh=2G/nfs-1dd-2-3.2.0-rc1
                10543.72        -9.1%      9580.37  snb/thresh=2G/nfs-1dd-3-3.2.0-rc1
               133015.32       -21.9%    103926.05  TOTAL nfs_commit_execute_time

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