[PATCH 0/2] Revert NUMA aspect of fair allocation policy

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Johannes and I have been investigating the NUMA behaviour of the fair
zone allocation policy over the last week. It's still a work in progress
but we had at least agreed that 3.12 and 3.13 are looking bad from a NUMA
perspective and settled on a patch. We did not reach this agreement fast
enough and the wrong patch got merged. This series reverts the problematic
patch and submits the one we agreed upon.

I ran a few quick tests on the series.

3.13.0-rc4	vanilla
latest-v5r3	Latest Linus tree: commit f7556698
nofairnuma-v5r3	These two patches

TLDR, the key impact is to NUMA "miss" which is how many page allocations
that used remote memory and impacted performance. The series eliminates them

                            3.13.0-rc4  3.13.0-rc4 3.13.0-rc4
                               vanilla latest-v5r3 nofairnuma-v5r3
kernbench
NUMA alloc hit                73791065    74090594    93572436
NUMA alloc miss               20034206    19733525           0

vmr-stream
NUMA alloc hit                 1354047     1536675     2105495
NUMA alloc miss                 773033      581918           0

page fault microbencharm
NUMA alloc hit               187897428   187004773   265000639
NUMA alloc miss               77105377    77995654           0

ebizzy
NUMA alloc hit               232222122   248319262   315782797
NUMA alloc miss               72813148    63336406           0

More comprehensive results;

kernbench
                          3.13.0-rc4            3.13.0-rc4            3.13.0-rc4
                             vanilla           latest-v5r3       nofairnuma-v5r3
User    min        1414.50 (  0.00%)     1414.50 (  0.00%)     1405.07 (  0.67%)
User    mean       1417.28 (  0.00%)     1418.02 ( -0.05%)     1409.90 (  0.52%)
User    stddev        2.36 (  0.00%)        3.32 (-40.48%)        3.17 (-34.29%)
User    max        1421.00 (  0.00%)     1423.68 ( -0.19%)     1414.50 (  0.46%)
User    range         6.50 (  0.00%)        9.18 (-41.23%)        9.43 (-45.08%)
System  min         114.82 (  0.00%)      115.24 ( -0.37%)      110.22 (  4.01%)
System  mean        116.03 (  0.00%)      115.52 (  0.44%)      110.52 (  4.75%)
System  stddev        0.77 (  0.00%)        0.27 ( 64.47%)        0.25 ( 67.71%)
System  max         117.15 (  0.00%)      115.87 (  1.09%)      110.82 (  5.40%)
System  range         2.33 (  0.00%)        0.63 ( 72.96%)        0.60 ( 74.25%)
Elapsed min          42.92 (  0.00%)       43.09 ( -0.40%)       43.08 ( -0.37%)
Elapsed mean         43.93 (  0.00%)       43.88 (  0.10%)       43.68 (  0.56%)
Elapsed stddev        0.53 (  0.00%)        0.51 (  3.19%)        0.38 ( 29.13%)
Elapsed max          44.45 (  0.00%)       44.60 ( -0.34%)       44.26 (  0.43%)
Elapsed range         1.53 (  0.00%)        1.51 (  1.31%)        1.18 ( 22.88%)
CPU     min        3443.00 (  0.00%)     3430.00 (  0.38%)     3438.00 (  0.15%)
CPU     mean       3490.40 (  0.00%)     3494.20 ( -0.11%)     3480.60 (  0.28%)
CPU     stddev       47.79 (  0.00%)       45.56 (  4.66%)       29.45 ( 38.38%)
CPU     max        3580.00 (  0.00%)     3559.00 (  0.59%)     3530.00 (  1.40%)
CPU     range       137.00 (  0.00%)      129.00 (  5.84%)       92.00 ( 32.85%)

          3.13.0-rc4  3.13.0-rc4  3.13.0-rc4
             vanilla latest-v5r3nofairnuma-v5r3
User         8523.56     8522.59     8484.37
System        705.44      702.19      671.60
Elapsed       310.46      307.89      305.01

Little obvious impact on the elapsed time for kernel builds but system
CPU usage is reduced

                            3.13.0-rc4  3.13.0-rc4  3.13.0-rc4
                               vanilla latest-v5r3nofairnuma-v5r3
NUMA alloc hit                73791065    74090594    93572436
NUMA alloc miss               20034206    19733525           0
NUMA interleave hit                  0           0           0
NUMA alloc local              73791054    74090589    93572431
NUMA page range updates        5874649     5946004     5849646
NUMA huge PMD updates              132         158         125
NUMA PTE updates               5807197     5865266     5785771
NUMA hint faults               2385553     2403333     2378242
NUMA hint local faults         1782172     1810993     2157010
NUMA hint local percent             74          75          90
NUMA pages migrated             474970      482561      208555
AutoNUMA cost                    11977       12067       11936

NUMA alloc misses are eliminated, NUMA hinting faults are more local.

vmr-stream
                          3.13.0-rc4            3.13.0-rc4            3.13.0-rc4
                             vanilla           latest-v5r3       nofairnuma-v5r3
Add      5M        3798.00 (  0.00%)     3794.10 ( -0.10%)     3964.79 (  4.39%)
Copy     5M        3366.28 (  0.00%)     3355.99 ( -0.31%)     3462.03 (  2.84%)
Scale    5M        3161.81 (  0.00%)     3162.40 (  0.02%)     3381.38 (  6.94%)
Triad    5M        3523.40 (  0.00%)     3519.55 ( -0.11%)     3838.11 (  8.93%)
Add      7M        3730.57 (  0.00%)     3770.11 (  1.06%)     3974.30 (  6.53%)
Copy     7M        3280.22 (  0.00%)     3344.28 (  1.95%)     3459.75 (  5.47%)
Scale    7M        3101.82 (  0.00%)     3145.88 (  1.42%)     3379.28 (  8.94%)
Triad    7M        3477.74 (  0.00%)     3503.28 (  0.73%)     3836.03 ( 10.30%)
Add      8M        3798.02 (  0.00%)     3783.36 ( -0.39%)     3973.07 (  4.61%)
Copy     8M        3358.04 (  0.00%)     3347.92 ( -0.30%)     3461.89 (  3.09%)
Scale    8M        3181.53 (  0.00%)     3148.60 ( -1.03%)     3377.80 (  6.17%)
Triad    8M        3533.03 (  0.00%)     3515.36 ( -0.50%)     3835.95 (  8.57%)
Add      10M       3800.29 (  0.00%)     3769.95 ( -0.80%)     3973.26 (  4.55%)
Copy     10M       3359.85 (  0.00%)     3350.60 ( -0.28%)     3462.44 (  3.05%)
Scale    10M       3173.04 (  0.00%)     3139.96 ( -1.04%)     3378.16 (  6.46%)
Triad    10M       3534.24 (  0.00%)     3504.22 ( -0.85%)     3834.26 (  8.49%)
Add      14M       3795.17 (  0.00%)     3801.05 (  0.15%)     3972.96 (  4.68%)
Copy     14M       3355.50 (  0.00%)     3367.94 (  0.37%)     3461.37 (  3.16%)
Scale    14M       3160.35 (  0.00%)     3167.24 (  0.22%)     3379.54 (  6.94%)
Triad    14M       3526.50 (  0.00%)     3526.30 ( -0.01%)     3835.83 (  8.77%)
Add      17M       3787.71 (  0.00%)     3778.67 ( -0.24%)     3974.02 (  4.92%)
Copy     17M       3353.88 (  0.00%)     3351.53 ( -0.07%)     3459.39 (  3.15%)
Scale    17M       3157.43 (  0.00%)     3153.50 ( -0.12%)     3378.06 (  6.99%)
Triad    17M       3519.97 (  0.00%)     3510.38 ( -0.27%)     3836.31 (  8.99%)
Add      21M       3813.99 (  0.00%)     3791.22 ( -0.60%)     4013.64 (  5.23%)
Copy     21M       3367.09 (  0.00%)     3343.67 ( -0.70%)     3478.93 (  3.32%)
Scale    21M       3170.85 (  0.00%)     3142.76 ( -0.89%)     3394.94 (  7.07%)
Triad    21M       3540.99 (  0.00%)     3524.25 ( -0.47%)     3853.95 (  8.84%)
Add      28M       3791.41 (  0.00%)     3766.75 ( -0.65%)     4012.68 (  5.84%)
Copy     28M       3351.51 (  0.00%)     3334.26 ( -0.51%)     3480.01 (  3.83%)
Scale    28M       3166.36 (  0.00%)     3145.50 ( -0.66%)     3393.61 (  7.18%)
Triad    28M       3524.64 (  0.00%)     3501.64 ( -0.65%)     3854.84 (  9.37%)
Add      35M       3804.79 (  0.00%)     3793.25 ( -0.30%)     3971.91 (  4.39%)
Copy     35M       3358.44 (  0.00%)     3358.86 (  0.01%)     3461.08 (  3.06%)
Scale    35M       3158.44 (  0.00%)     3165.12 (  0.21%)     3380.14 (  7.02%)
Triad    35M       3535.12 (  0.00%)     3520.64 ( -0.41%)     3836.04 (  8.51%)
Add      42M       3809.87 (  0.00%)     3767.46 ( -1.11%)     3973.00 (  4.28%)
Copy     42M       3355.79 (  0.00%)     3341.04 ( -0.44%)     3462.68 (  3.19%)
Scale    42M       3172.80 (  0.00%)     3146.79 ( -0.82%)     3378.09 (  6.47%)
Triad    42M       3540.69 (  0.00%)     3501.69 ( -1.10%)     3838.21 (  8.40%)
Add      56M       3785.86 (  0.00%)     3791.85 (  0.16%)     3972.55 (  4.93%)
Copy     56M       3353.31 (  0.00%)     3360.84 (  0.22%)     3460.49 (  3.20%)
Scale    56M       3165.67 (  0.00%)     3159.44 ( -0.20%)     3378.81 (  6.73%)
Triad    56M       3521.56 (  0.00%)     3523.75 (  0.06%)     3836.52 (  8.94%)
Add      71M       3810.08 (  0.00%)     3792.50 ( -0.46%)     3973.04 (  4.28%)
Copy     71M       3368.62 (  0.00%)     3347.75 ( -0.62%)     3462.05 (  2.77%)
Scale    71M       3167.19 (  0.00%)     3160.05 ( -0.23%)     3379.95 (  6.72%)
Triad    71M       3534.10 (  0.00%)     3524.17 ( -0.28%)     3837.87 (  8.60%)
Add      85M       3752.25 (  0.00%)     3767.85 (  0.42%)     3973.19 (  5.89%)
Copy     85M       3285.89 (  0.00%)     3333.99 (  1.46%)     3459.58 (  5.29%)
Scale    85M       3103.94 (  0.00%)     3145.25 (  1.33%)     3379.54 (  8.88%)
Triad    85M       3500.92 (  0.00%)     3506.22 (  0.15%)     3834.88 (  9.54%)
Add      113M      3798.99 (  0.00%)     3800.44 (  0.04%)     4012.76 (  5.63%)
Copy     113M      3366.05 (  0.00%)     3354.30 ( -0.35%)     3480.66 (  3.40%)
Scale    113M      3158.15 (  0.00%)     3151.65 ( -0.21%)     3395.47 (  7.51%)
Triad    113M      3527.05 (  0.00%)     3523.88 ( -0.09%)     3854.47 (  9.28%)
Add      142M      3796.64 (  0.00%)     3773.35 ( -0.61%)     4014.26 (  5.73%)
Copy     142M      3361.19 (  0.00%)     3345.00 ( -0.48%)     3481.51 (  3.58%)
Scale    142M      3161.73 (  0.00%)     3135.12 ( -0.84%)     3395.00 (  7.38%)
Triad    142M      3529.36 (  0.00%)     3503.87 ( -0.72%)     3854.34 (  9.21%)
Add      170M      3806.53 (  0.00%)     3792.00 ( -0.38%)     3974.21 (  4.41%)
Copy     170M      3357.36 (  0.00%)     3352.38 ( -0.15%)     3461.62 (  3.11%)
Scale    170M      3160.90 (  0.00%)     3164.89 (  0.13%)     3379.16 (  6.91%)
Triad    170M      3535.49 (  0.00%)     3523.51 ( -0.34%)     3836.48 (  8.51%)
Add      227M      3796.53 (  0.00%)     3767.46 ( -0.77%)     4011.06 (  5.65%)
Copy     227M      3364.99 (  0.00%)     3332.86 ( -0.95%)     3479.83 (  3.41%)
Scale    227M      3164.12 (  0.00%)     3152.09 ( -0.38%)     3397.28 (  7.37%)
Triad    227M      3529.30 (  0.00%)     3505.34 ( -0.68%)     3855.76 (  9.25%)
Add      284M      3799.86 (  0.00%)     3796.23 ( -0.10%)     4012.36 (  5.59%)
Copy     284M      3367.08 (  0.00%)     3358.22 ( -0.26%)     3477.79 (  3.29%)
Scale    284M      3160.58 (  0.00%)     3149.70 ( -0.34%)     3396.63 (  7.47%)
Triad    284M      3528.66 (  0.00%)     3523.20 ( -0.15%)     3854.18 (  9.22%)
Add      341M      3806.61 (  0.00%)     3772.41 ( -0.90%)     4001.81 (  5.13%)
Copy     341M      3356.31 (  0.00%)     3334.36 ( -0.65%)     3474.46 (  3.52%)
Scale    341M      3161.30 (  0.00%)     3146.39 ( -0.47%)     3392.10 (  7.30%)
Triad    341M      3541.64 (  0.00%)     3508.46 ( -0.94%)     3849.70 (  8.70%)
Add      455M      3791.88 (  0.00%)     3786.70 ( -0.14%)     4013.14 (  5.84%)
Copy     455M      3351.42 (  0.00%)     3355.09 (  0.11%)     3478.80 (  3.80%)
Scale    455M      3153.66 (  0.00%)     3160.05 (  0.20%)     3395.35 (  7.66%)
Triad    455M      3523.62 (  0.00%)     3519.40 ( -0.12%)     3855.58 (  9.42%)
Add      568M      3799.33 (  0.00%)     3798.96 ( -0.01%)     3971.49 (  4.53%)
Copy     568M      3362.64 (  0.00%)     3350.96 ( -0.35%)     3459.20 (  2.87%)
Scale    568M      3173.04 (  0.00%)     3150.35 ( -0.72%)     3380.60 (  6.54%)
Triad    568M      3529.29 (  0.00%)     3525.15 ( -0.12%)     3840.76 (  8.83%)
Add      682M      3797.03 (  0.00%)     3768.91 ( -0.74%)     3973.01 (  4.63%)
Copy     682M      3354.72 (  0.00%)     3339.98 ( -0.44%)     3460.17 (  3.14%)
Scale    682M      3153.94 (  0.00%)     3148.32 ( -0.18%)     3377.85 (  7.10%)
Triad    682M      3526.96 (  0.00%)     3505.39 ( -0.61%)     3836.54 (  8.78%)
Add      910M      3795.70 (  0.00%)     3788.86 ( -0.18%)     3992.89 (  5.20%)
Copy     910M      3357.38 (  0.00%)     3354.01 ( -0.10%)     3471.01 (  3.38%)
Scale    910M      3166.96 (  0.00%)     3162.86 ( -0.13%)     3386.16 (  6.92%)
Triad    910M      3529.87 (  0.00%)     3519.05 ( -0.31%)     3843.79 (  8.89%)
Add      1137M     3792.85 (  0.00%)     3771.51 ( -0.56%)     3971.01 (  4.70%)
Copy     1137M     3352.91 (  0.00%)     3346.70 ( -0.19%)     3461.26 (  3.23%)
Scale    1137M     3169.37 (  0.00%)     3142.76 ( -0.84%)     3379.83 (  6.64%)
Triad    1137M     3530.16 (  0.00%)     3504.29 ( -0.73%)     3838.27 (  8.73%)
Add      1365M     3801.74 (  0.00%)     3793.69 ( -0.21%)     4013.10 (  5.56%)
Copy     1365M     3363.16 (  0.00%)     3352.88 ( -0.31%)     3481.69 (  3.52%)
Scale    1365M     3172.05 (  0.00%)     3164.03 ( -0.25%)     3394.99 (  7.03%)
Triad    1365M     3535.04 (  0.00%)     3526.16 ( -0.25%)     3853.50 (  9.01%)
Add      1820M     3787.56 (  0.00%)     3802.84 (  0.40%)     4013.34 (  5.96%)
Copy     1820M     3353.48 (  0.00%)     3359.98 (  0.19%)     3479.53 (  3.76%)
Scale    1820M     3159.06 (  0.00%)     3158.76 ( -0.01%)     3396.10 (  7.50%)
Triad    1820M     3523.10 (  0.00%)     3533.46 (  0.29%)     3855.48 (  9.43%)
Add      2275M     3792.81 (  0.00%)     3767.08 ( -0.68%)     3972.93 (  4.75%)
Copy     2275M     3363.74 (  0.00%)     3338.62 ( -0.75%)     3459.66 (  2.85%)
Scale    2275M     3162.05 (  0.00%)     3147.96 ( -0.45%)     3379.24 (  6.87%)
Triad    2275M     3526.64 (  0.00%)     3502.22 ( -0.69%)     3836.95 (  8.80%)
Add      2730M     3787.14 (  0.00%)     3790.99 (  0.10%)     4010.43 (  5.90%)
Copy     2730M     3350.74 (  0.00%)     3357.16 (  0.19%)     3480.68 (  3.88%)
Scale    2730M     3152.45 (  0.00%)     3161.72 (  0.29%)     3396.36 (  7.74%)
Triad    2730M     3518.34 (  0.00%)     3519.35 (  0.03%)     3853.71 (  9.53%)
Add      3640M     3806.59 (  0.00%)     3767.80 ( -1.02%)     4015.21 (  5.48%)
Copy     3640M     3357.56 (  0.00%)     3328.65 ( -0.86%)     3481.54 (  3.69%)
Scale    3640M     3165.75 (  0.00%)     3145.30 ( -0.65%)     3394.62 (  7.23%)
Triad    3640M     3536.01 (  0.00%)     3501.84 ( -0.97%)     3853.20 (  8.97%)
Add      4551M     3781.56 (  0.00%)     3796.88 (  0.40%)     4004.59 (  5.90%)
Copy     4551M     3351.02 (  0.00%)     3351.90 (  0.03%)     3468.85 (  3.52%)
Scale    4551M     3155.90 (  0.00%)     3157.51 (  0.05%)     3385.93 (  7.29%)
Triad    4551M     3515.12 (  0.00%)     3523.09 (  0.23%)     3844.51 (  9.37%)
Add      5461M     3799.03 (  0.00%)     3770.88 ( -0.74%)     3991.51 (  5.07%)
Copy     5461M     3352.10 (  0.00%)     3335.93 ( -0.48%)     3470.78 (  3.54%)
Scale    5461M     3162.40 (  0.00%)     3156.15 ( -0.20%)     3386.75 (  7.09%)
Triad    5461M     3530.26 (  0.00%)     3513.79 ( -0.47%)     3845.24 (  8.92%)
Add      7281M     3782.84 (  0.00%)     3773.49 ( -0.25%)     3969.95 (  4.95%)
Copy     7281M     3346.04 (  0.00%)     3334.83 ( -0.34%)     3459.87 (  3.40%)
Scale    7281M     3162.56 (  0.00%)     3156.58 ( -0.19%)     3380.31 (  6.89%)
Triad    7281M     3519.31 (  0.00%)     3508.26 ( -0.31%)     3837.59 (  9.04%)
Add      9102M     3809.64 (  0.00%)     3777.05 ( -0.86%)     3972.09 (  4.26%)
Copy     9102M     3367.56 (  0.00%)     3343.22 ( -0.72%)     3460.40 (  2.76%)
Scale    9102M     3167.18 (  0.00%)     3148.99 ( -0.57%)     3379.55 (  6.71%)
Triad    9102M     3538.70 (  0.00%)     3511.49 ( -0.77%)     3836.54 (  8.42%)
Add      10922M     3787.40 (  0.00%)     3795.31 (  0.21%)     3964.15 (  4.67%)
Copy     10922M     3346.43 (  0.00%)     3350.26 (  0.11%)     3461.49 (  3.44%)
Scale    10922M     3168.93 (  0.00%)     3157.68 ( -0.36%)     3383.08 (  6.76%)
Triad    10922M     3526.01 (  0.00%)     3525.31 ( -0.02%)     3838.86 (  8.87%)
Add      14563M     3794.28 (  0.00%)     3803.31 (  0.24%)     3994.41 (  5.27%)
Copy     14563M     3356.78 (  0.00%)     3354.56 ( -0.07%)     3464.31 (  3.20%)
Scale    14563M     3157.36 (  0.00%)     3154.81 ( -0.08%)     3380.29 (  7.06%)
Triad    14563M     3528.26 (  0.00%)     3532.54 (  0.12%)     3838.84 (  8.80%)
Add      18204M     3792.91 (  0.00%)     3765.64 ( -0.72%)     3970.11 (  4.67%)
Copy     18204M     3359.59 (  0.00%)     3334.04 ( -0.76%)     3460.66 (  3.01%)
Scale    18204M     3153.11 (  0.00%)     3149.93 ( -0.10%)     3380.03 (  7.20%)
Triad    18204M     3521.49 (  0.00%)     3504.64 ( -0.48%)     3836.75 (  8.95%)
Add      21845M     3793.56 (  0.00%)     3791.04 ( -0.07%)     3983.20 (  5.00%)
Copy     21845M     3348.75 (  0.00%)     3362.11 (  0.40%)     3472.91 (  3.71%)
Scale    21845M     3163.58 (  0.00%)     3158.30 ( -0.17%)     3388.11 (  7.10%)
Triad    21845M     3526.31 (  0.00%)     3520.69 ( -0.16%)     3848.07 (  9.12%)
Add      29127M     3796.59 (  0.00%)     3792.54 ( -0.11%)     3972.66 (  4.64%)
Copy     29127M     3358.66 (  0.00%)     3346.16 ( -0.37%)     3461.94 (  3.07%)
Scale    29127M     3162.06 (  0.00%)     3144.85 ( -0.54%)     3380.66 (  6.91%)
Triad    29127M     3530.26 (  0.00%)     3520.10 ( -0.29%)     3835.62 (  8.65%)
Add      36408M     3813.66 (  0.00%)     3799.59 ( -0.37%)     3971.34 (  4.13%)
Copy     36408M     3367.69 (  0.00%)     3350.04 ( -0.52%)     3461.83 (  2.80%)
Scale    36408M     3170.05 (  0.00%)     3172.31 (  0.07%)     3379.70 (  6.61%)
Triad    36408M     3540.65 (  0.00%)     3535.71 ( -0.14%)     3837.16 (  8.37%)
Add      43690M     3798.39 (  0.00%)     3758.19 ( -1.06%)     4014.44 (  5.69%)
Copy     43690M     3353.06 (  0.00%)     3337.86 ( -0.45%)     3478.91 (  3.75%)
Scale    43690M     3161.25 (  0.00%)     3148.81 ( -0.39%)     3394.53 (  7.38%)
Triad    43690M     3529.36 (  0.00%)     3496.36 ( -0.94%)     3852.56 (  9.16%)
Add      58254M     3802.26 (  0.00%)     3787.54 ( -0.39%)     4013.98 (  5.57%)
Copy     58254M     3362.43 (  0.00%)     3351.81 ( -0.32%)     3479.95 (  3.50%)
Scale    58254M     3170.20 (  0.00%)     3161.28 ( -0.28%)     3395.40 (  7.10%)
Triad    58254M     3536.94 (  0.00%)     3521.71 ( -0.43%)     3853.26 (  8.94%)
Add      72817M     3791.47 (  0.00%)     3792.54 (  0.03%)     3969.94 (  4.71%)
Copy     72817M     3356.57 (  0.00%)     3352.09 ( -0.13%)     3460.17 (  3.09%)
Scale    72817M     3157.90 (  0.00%)     3156.49 ( -0.04%)     3378.86 (  7.00%)
Triad    72817M     3524.35 (  0.00%)     3517.28 ( -0.20%)     3838.25 (  8.91%)
Add      87381M     3523.39 (  0.00%)     3506.88 ( -0.47%)     3813.72 (  8.24%)
Copy     87381M     3190.45 (  0.00%)     3169.49 ( -0.66%)     3253.15 (  1.97%)
Scale    87381M     2842.54 (  0.00%)     2834.86 ( -0.27%)     3162.54 ( 11.26%)
Triad    87381M     3464.16 (  0.00%)     3450.29 ( -0.40%)     3763.46 (  8.64%)

This is a memory streaming benchmark that benefits heavily from using local memory.
System CPU usage is reduced as well as similar observations about NUMA misses
in vmstats and the locality of NUMA hinting faults.

pft
                        3.13.0-rc4            3.13.0-rc4            3.13.0-rc4
                           vanilla           latest-v5r3       nofairnuma-v5r3
User       1       0.6710 (  0.00%)       0.6780 ( -1.04%)       0.6540 (  2.53%)
User       2       0.7070 (  0.00%)       0.6530 (  7.64%)       0.6980 (  1.27%)
User       3       0.7330 (  0.00%)       0.7090 (  3.27%)       0.7160 (  2.32%)
User       4       0.7150 (  0.00%)       0.7360 ( -2.94%)       0.7690 ( -7.55%)
User       5       0.7630 (  0.00%)       0.7700 ( -0.92%)       0.7960 ( -4.33%)
User       6       0.8070 (  0.00%)       0.7910 (  1.98%)       0.8040 (  0.37%)
User       7       0.8110 (  0.00%)       0.8570 ( -5.67%)       0.7880 (  2.84%)
User       8       0.7930 (  0.00%)       0.8050 ( -1.51%)       0.8080 ( -1.89%)
System     1       9.1070 (  0.00%)       9.0330 (  0.81%)       8.2500 (  9.41%)
System     2       9.3600 (  0.00%)       9.2440 (  1.24%)       8.2860 ( 11.47%)
System     3       9.0810 (  0.00%)       8.9210 (  1.76%)       8.5590 (  5.75%)
System     4       8.8590 (  0.00%)       8.7850 (  0.84%)       8.6400 (  2.47%)
System     5       9.5320 (  0.00%)       9.3480 (  1.93%)       8.9360 (  6.25%)
System     6       9.8130 (  0.00%)       9.7910 (  0.22%)       9.1830 (  6.42%)
System     7       9.9470 (  0.00%)       9.9100 (  0.37%)       9.1550 (  7.96%)
System     8       9.8450 (  0.00%)       9.8180 (  0.27%)       9.3150 (  5.38%)
Elapsed    1       9.7810 (  0.00%)       9.7170 (  0.65%)       8.9070 (  8.94%)
Elapsed    2       5.0490 (  0.00%)       5.0120 (  0.73%)       4.5640 (  9.61%)
Elapsed    3       3.2930 (  0.00%)       3.2570 (  1.09%)       3.1060 (  5.68%)
Elapsed    4       2.4250 (  0.00%)       2.4120 (  0.54%)       2.3770 (  1.98%)
Elapsed    5       2.1400 (  0.00%)       2.1020 (  1.78%)       2.0130 (  5.93%)
Elapsed    6       1.8310 (  0.00%)       1.8210 (  0.55%)       1.6990 (  7.21%)
Elapsed    7       1.5780 (  0.00%)       1.6000 ( -1.39%)       1.4610 (  7.41%)
Elapsed    8       1.3570 (  0.00%)       1.3440 (  0.96%)       1.2980 (  4.35%)
Faults/cpu 1  337939.0846 (  0.00%)  340235.9696 (  0.68%)  371187.5111 (  9.84%)
Faults/cpu 2  328295.1589 (  0.00%)  333950.4292 (  1.72%)  367770.1269 ( 12.02%)
Faults/cpu 3  336740.2077 (  0.00%)  343289.7536 (  1.94%)  356429.4274 (  5.85%)
Faults/cpu 4  345242.9687 (  0.00%)  347153.8004 (  0.55%)  351299.3686 (  1.75%)
Faults/cpu 5  321235.7607 (  0.00%)  326668.3097 (  1.69%)  339716.8029 (  5.75%)
Faults/cpu 6  311274.7429 (  0.00%)  312409.6305 (  0.36%)  331098.6934 (  6.37%)
Faults/cpu 7  307505.0201 (  0.00%)  306974.8841 ( -0.17%)  332412.6864 (  8.10%)
Faults/cpu 8  310762.2478 (  0.00%)  311220.4981 (  0.15%)  326840.6273 (  5.17%)
Faults/sec 1  337818.9673 (  0.00%)  340054.4570 (  0.66%)  371024.2076 (  9.83%)
Faults/sec 2  654376.0180 (  0.00%)  659535.4438 (  0.79%)  724303.5620 ( 10.69%)
Faults/sec 3 1002998.9609 (  0.00%) 1015206.6321 (  1.22%) 1064424.6960 (  6.12%)
Faults/sec 4 1362925.0535 (  0.00%) 1370053.7380 (  0.52%) 1390373.3128 (  2.01%)
Faults/sec 5 1545330.0919 (  0.00%) 1573054.8359 (  1.79%) 1643071.0340 (  6.32%)
Faults/sec 6 1806556.5143 (  0.00%) 1816484.7109 (  0.55%) 1946598.9551 (  7.75%)
Faults/sec 7 2098145.9361 (  0.00%) 2069188.7963 ( -1.38%) 2260923.0951 (  7.76%)
Faults/sec 8 2436469.5049 (  0.00%) 2460168.4672 (  0.97%) 2551945.7388 (  4.74%)

Big benefits again from using local memory.

ebizzy
                     3.13.0-rc4            3.13.0-rc4            3.13.0-rc4
                        vanilla           latest-v5r3       nofairnuma-v5r3
Mean   1      3099.33 (  0.00%)     3148.33 (  1.58%)     3200.67 (  3.27%)
Mean   2      2265.67 (  0.00%)     2317.00 (  2.27%)     2318.33 (  2.32%)
Mean   3      2212.33 (  0.00%)     2266.00 (  2.43%)     2275.33 (  2.85%)
Mean   4      2190.67 (  0.00%)     2277.67 (  3.97%)     2267.67 (  3.51%)
Mean   5      2191.33 (  0.00%)     2261.67 (  3.21%)     2263.00 (  3.27%)
Mean   6      2181.00 (  0.00%)     2233.67 (  2.41%)     2251.33 (  3.22%)
Mean   7      2188.67 (  0.00%)     2244.67 (  2.56%)     2298.33 (  5.01%)
Mean   8      2180.67 (  0.00%)     2244.00 (  2.90%)     2253.33 (  3.33%)
Mean   12     2200.67 (  0.00%)     2205.33 (  0.21%)     2252.67 (  2.36%)
Mean   16     2197.00 (  0.00%)     2231.00 (  1.55%)     2236.33 (  1.79%)
Mean   20     2204.67 (  0.00%)     2187.00 ( -0.80%)     2220.33 (  0.71%)
Mean   24     2124.00 (  0.00%)     2178.00 (  2.54%)     2206.00 (  3.86%)
Mean   28     2071.67 (  0.00%)     2112.00 (  1.95%)     2141.67 (  3.38%)
Mean   32     2028.67 (  0.00%)     2074.00 (  2.23%)     2101.00 (  3.57%)
Mean   36     1969.33 (  0.00%)     2023.67 (  2.76%)     2055.33 (  4.37%)
Mean   40     1935.67 (  0.00%)     1994.67 (  3.05%)     2040.33 (  5.41%)
Mean   44     1909.33 (  0.00%)     1960.33 (  2.67%)     2006.33 (  5.08%)
Mean   48     1885.33 (  0.00%)     1924.00 (  2.05%)     2009.33 (  6.58%)
Range  1       106.00 (  0.00%)       10.00 ( 90.57%)       27.00 ( 74.53%)
Range  2        54.00 (  0.00%)       69.00 (-27.78%)        9.00 ( 83.33%)
Range  3        35.00 (  0.00%)       30.00 ( 14.29%)       37.00 ( -5.71%)
Range  4        16.00 (  0.00%)       48.00 (-200.00%)       41.00 (-156.25%)
Range  5         3.00 (  0.00%)       54.00 (-1700.00%)       11.00 (-266.67%)
Range  6        69.00 (  0.00%)       18.00 ( 73.91%)       31.00 ( 55.07%)
Range  7        28.00 (  0.00%)      137.00 (-389.29%)       66.00 (-135.71%)
Range  8        71.00 (  0.00%)       22.00 ( 69.01%)        9.00 ( 87.32%)
Range  12       50.00 (  0.00%)       39.00 ( 22.00%)       82.00 (-64.00%)
Range  16       37.00 (  0.00%)       38.00 ( -2.70%)       42.00 (-13.51%)
Range  20       66.00 (  0.00%)       28.00 ( 57.58%)       34.00 ( 48.48%)
Range  24       43.00 (  0.00%)      114.00 (-165.12%)       22.00 ( 48.84%)
Range  28       20.00 (  0.00%)       54.00 (-170.00%)       68.00 (-240.00%)
Range  32       17.00 (  0.00%)       54.00 (-217.65%)       37.00 (-117.65%)
Range  36       14.00 (  0.00%)       34.00 (-142.86%)       21.00 (-50.00%)
Range  40       10.00 (  0.00%)       35.00 (-250.00%)       25.00 (-150.00%)
Range  44       19.00 (  0.00%)       14.00 ( 26.32%)       17.00 ( 10.53%)
Range  48        8.00 (  0.00%)       22.00 (-175.00%)        6.00 ( 25.00%)
Stddev 1        46.15 (  0.00%)        4.50 ( 90.26%)       11.15 ( 75.85%)
Stddev 2        22.54 (  0.00%)       29.63 (-31.44%)        3.68 ( 83.67%)
Stddev 3        14.61 (  0.00%)       12.57 ( 13.99%)       15.20 ( -3.98%)
Stddev 4         7.54 (  0.00%)       19.74 (-161.68%)       19.33 (-156.25%)
Stddev 5         1.25 (  0.00%)       25.22 (-1922.37%)        4.97 (-298.21%)
Stddev 6        28.18 (  0.00%)        7.41 ( 73.71%)       12.76 ( 54.71%)
Stddev 7        11.47 (  0.00%)       56.07 (-388.88%)       30.00 (-161.59%)
Stddev 8        29.78 (  0.00%)        9.42 ( 68.38%)        3.68 ( 87.64%)
Stddev 12       20.95 (  0.00%)       16.21 ( 22.61%)       34.03 (-62.45%)
Stddev 16       15.25 (  0.00%)       15.58 ( -2.13%)       18.73 (-22.81%)
Stddev 20       27.21 (  0.00%)       12.19 ( 55.18%)       15.37 ( 43.51%)
Stddev 24       19.82 (  0.00%)       51.15 (-158.11%)        8.98 ( 54.68%)
Stddev 28        8.81 (  0.00%)       25.46 (-189.06%)       28.43 (-222.82%)
Stddev 32        6.94 (  0.00%)       22.45 (-223.29%)       16.39 (-136.04%)
Stddev 36        5.73 (  0.00%)       14.27 (-148.78%)        8.96 (-56.18%)
Stddev 40        4.50 (  0.00%)       14.84 (-230.00%)       10.27 (-128.47%)
Stddev 44        7.85 (  0.00%)        5.79 ( 26.17%)        6.94 ( 11.49%)
Stddev 48        3.77 (  0.00%)        9.42 (-149.69%)        2.49 ( 33.86%)

Smallish gain but enough to be happy about.

 mm/page_alloc.c | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

-- 
1.8.4

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