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Date: Thu, 12 Dec 2013 15:06:15 +0000
From: Mel Gorman <mgorman@...e.de>
To: Johannes Weiner <hannes@...xchg.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Dave Hansen <dave.hansen@...el.com>,
Rik van Riel <riel@...hat.com>,
Linux-MM <linux-mm@...ck.org>,
LKML <linux-kernel@...r.kernel.org>, Mel Gorman <mgorman@...e.de>
Subject: [RFC PATCH 0/4] Configurable fair allocation zone policy
Commit 81c0a2bb ("mm: page_alloc: fair zone allocator policy") solved a
bug whereby new pages could be reclaimed before old pages because of how
the page allocator and kswapd interacted on the per-zone LRU lists.
Unfortunately a side-effect missed during review was that it's now very
easy to allocate remote memory on NUMA machines. The problem is that
it is not a simple case of just restoring local allocation policies as
there are genuine reasons why global page aging may be prefereable. It's
still a major change to default behaviour so this patch makes the policy
configurable and sets what I think is a sensible default.
The patches are on top of some NUMA balancing patches currently in -mm.
The first patch in the series is a patch posted by Johannes that must be
taken into account before any of my patches on top. The last patch of the
series is what alters default behaviour and makes the fair zone allocator
policy configurable.
Sniff test results based on following kernels
vanilla 3.13-rc3 stock
instrument-v5r1 NUMA balancing patches just to rule out any conflicts there
lruslabonly-v1r2 Patch 1 only
local-v1r2 Full series
kernbench
3.13.0-rc3 3.13.0-rc3 3.13.0-rc3 3.13.0-rc3
vanilla instrument-v5r1 lruslabonly-v1r2 local-v1r2
User min 1417.32 ( 0.00%) 1412.10 ( 0.37%) 1408.49 ( 0.62%) 1407.41 ( 0.70%)
User mean 1419.10 ( 0.00%) 1419.18 ( -0.01%) 1413.36 ( 0.40%) 1410.62 ( 0.60%)
User stddev 2.25 ( 0.00%) 5.14 (-128.59%) 3.71 (-64.89%) 3.11 (-38.47%)
User max 1422.92 ( 0.00%) 1425.26 ( -0.16%) 1419.83 ( 0.22%) 1416.30 ( 0.47%)
User range 5.60 ( 0.00%) 13.16 (-135.00%) 11.34 (-102.50%) 8.89 (-58.75%)
System min 114.83 ( 0.00%) 114.69 ( 0.12%) 113.76 ( 0.93%) 108.45 ( 5.56%)
System mean 115.89 ( 0.00%) 115.18 ( 0.61%) 114.39 ( 1.29%) 108.93 ( 6.00%)
System stddev 0.63 ( 0.00%) 0.33 ( 48.39%) 0.65 ( -3.01%) 0.50 ( 21.44%)
System max 116.81 ( 0.00%) 115.65 ( 0.99%) 115.55 ( 1.08%) 109.76 ( 6.04%)
System range 1.98 ( 0.00%) 0.96 ( 51.52%) 1.79 ( 9.60%) 1.31 ( 33.84%)
Elapsed min 42.90 ( 0.00%) 42.42 ( 1.12%) 43.62 ( -1.68%) 42.91 ( -0.02%)
Elapsed mean 43.58 ( 0.00%) 43.56 ( 0.04%) 44.04 ( -1.05%) 44.30 ( -1.66%)
Elapsed stddev 0.74 ( 0.00%) 1.09 (-46.88%) 0.25 ( 66.08%) 1.16 (-56.18%)
Elapsed max 44.52 ( 0.00%) 45.36 ( -1.89%) 44.33 ( 0.43%) 46.39 ( -4.20%)
Elapsed range 1.62 ( 0.00%) 2.94 (-81.48%) 0.71 ( 56.17%) 3.48 (-114.81%)
CPU min 3451.00 ( 0.00%) 3366.00 ( 2.46%) 3441.00 ( 0.29%) 3269.00 ( 5.27%)
CPU mean 3522.40 ( 0.00%) 3523.80 ( -0.04%) 3468.40 ( 1.53%) 3431.60 ( 2.58%)
CPU stddev 54.34 ( 0.00%) 97.81 (-79.99%) 24.70 ( 54.54%) 89.66 (-64.99%)
CPU max 3570.00 ( 0.00%) 3630.00 ( -1.68%) 3501.00 ( 1.93%) 3541.00 ( 0.81%)
CPU range 119.00 ( 0.00%) 264.00 (-121.85%) 60.00 ( 49.58%) 272.00 (-128.57%)
3.13.0-rc3 3.13.0-rc3 3.13.0-rc3 3.13.0-rc3
vanillainstrument-v5r1lruslabonly-v1r2 local-v1r2
User 8540.49 8535.44 8502.52 8490.02
System 706.31 701.29 697.45 664.39
Elapsed 307.58 309.38 311.90 311.43
kernbench figures themselves are not that compelling but the system CPU cost
is down a lot. It's just such a small percentage of the overall workload
that it doesn't really matter and the processes are short lived anyway.
3.13.0-rc3 3.13.0-rc3 3.13.0-rc3 3.13.0-rc3
vanillainstrument-v5r1lruslabonly-v1r2 local-v1r2
NUMA alloc hit 73783951 73094711 73540917 93365205
NUMA alloc miss 20013534 20280058 19805156 0
NUMA interleave hit 0 0 0 0
NUMA alloc local 73783935 73094693 73540908 93365198
NUMA miss rate speaks for itself.
vmr-stream
3.13.0-rc3 3.13.0-rc3 3.13.0-rc3 3.13.0-rc3
vanilla instrument-v5r1 lruslabonly-v1r2 local-v1r2
Add 5M 3809.80 ( 0.00%) 3793.23 ( -0.44%) 3808.76 ( -0.03%) 3997.69 ( 4.93%)
Copy 5M 3360.75 ( 0.00%) 3362.61 ( 0.06%) 3367.19 ( 0.19%) 3478.45 ( 3.50%)
Scale 5M 3160.39 ( 0.00%) 3151.84 ( -0.27%) 3159.05 ( -0.04%) 3399.14 ( 7.55%)
Triad 5M 3533.04 ( 0.00%) 3523.70 ( -0.26%) 3536.32 ( 0.09%) 3858.46 ( 9.21%)
Add 7M 3789.82 ( 0.00%) 3796.51 ( 0.18%) 3799.61 ( 0.26%) 4029.79 ( 6.33%)
Copy 7M 3345.85 ( 0.00%) 3358.16 ( 0.37%) 3353.81 ( 0.24%) 3483.16 ( 4.10%)
Scale 7M 3176.00 ( 0.00%) 3161.42 ( -0.46%) 3161.61 ( -0.45%) 3403.88 ( 7.17%)
Triad 7M 3528.85 ( 0.00%) 3530.45 ( 0.05%) 3533.71 ( 0.14%) 3856.90 ( 9.30%)
Add 8M 3801.60 ( 0.00%) 3813.84 ( 0.32%) 3811.72 ( 0.27%) 3976.81 ( 4.61%)
Copy 8M 3364.64 ( 0.00%) 3365.61 ( 0.03%) 3362.38 ( -0.07%) 3473.99 ( 3.25%)
Scale 8M 3169.34 ( 0.00%) 3173.77 ( 0.14%) 3160.40 ( -0.28%) 3396.07 ( 7.15%)
Triad 8M 3531.38 ( 0.00%) 3539.19 ( 0.22%) 3536.68 ( 0.15%) 3854.70 ( 9.16%)
Add 10M 3807.95 ( 0.00%) 3798.47 ( -0.25%) 3788.44 ( -0.51%) 4003.61 ( 5.14%)
Copy 10M 3365.64 ( 0.00%) 3363.00 ( -0.08%) 3355.89 ( -0.29%) 3477.50 ( 3.32%)
Scale 10M 3172.71 ( 0.00%) 3177.81 ( 0.16%) 3165.05 ( -0.24%) 3397.21 ( 7.08%)
Triad 10M 3536.15 ( 0.00%) 3534.21 ( -0.05%) 3523.98 ( -0.34%) 3857.77 ( 9.10%)
Add 14M 3787.56 ( 0.00%) 3797.21 ( 0.25%) 3797.02 ( 0.25%) 4003.90 ( 5.71%)
Copy 14M 3345.19 ( 0.00%) 3346.86 ( 0.05%) 3355.17 ( 0.30%) 3477.81 ( 3.96%)
Scale 14M 3154.55 ( 0.00%) 3169.49 ( 0.47%) 3161.52 ( 0.22%) 3397.43 ( 7.70%)
Triad 14M 3522.09 ( 0.00%) 3533.46 ( 0.32%) 3526.82 ( 0.13%) 3857.32 ( 9.52%)
Add 17M 3806.34 ( 0.00%) 3803.44 ( -0.08%) 3786.03 ( -0.53%) 4008.76 ( 5.32%)
Copy 17M 3368.39 ( 0.00%) 3364.10 ( -0.13%) 3353.70 ( -0.44%) 3482.19 ( 3.38%)
Scale 17M 3169.18 ( 0.00%) 3170.80 ( 0.05%) 3169.06 ( -0.00%) 3401.51 ( 7.33%)
Triad 17M 3535.05 ( 0.00%) 3536.79 ( 0.05%) 3521.98 ( -0.37%) 3863.29 ( 9.29%)
Add 21M 3795.31 ( 0.00%) 3808.91 ( 0.36%) 3797.88 ( 0.07%) 3996.53 ( 5.30%)
Copy 21M 3353.43 ( 0.00%) 3360.01 ( 0.20%) 3357.44 ( 0.12%) 3477.10 ( 3.69%)
Scale 21M 3160.96 ( 0.00%) 3164.94 ( 0.13%) 3154.44 ( -0.21%) 3400.94 ( 7.59%)
Triad 21M 3530.45 ( 0.00%) 3540.10 ( 0.27%) 3527.00 ( -0.10%) 3858.31 ( 9.29%)
Add 28M 3803.11 ( 0.00%) 3792.40 ( -0.28%) 3786.70 ( -0.43%) 4003.07 ( 5.26%)
Copy 28M 3361.16 ( 0.00%) 3363.44 ( 0.07%) 3357.54 ( -0.11%) 3475.82 ( 3.41%)
Scale 28M 3160.43 ( 0.00%) 3148.44 ( -0.38%) 3157.26 ( -0.10%) 3398.14 ( 7.52%)
Triad 28M 3533.66 ( 0.00%) 3517.45 ( -0.46%) 3525.84 ( -0.22%) 3856.66 ( 9.14%)
Add 35M 3792.86 ( 0.00%) 3795.61 ( 0.07%) 3794.84 ( 0.05%) 4009.65 ( 5.72%)
Copy 35M 3344.24 ( 0.00%) 3356.56 ( 0.37%) 3351.18 ( 0.21%) 3484.09 ( 4.18%)
Scale 35M 3160.14 ( 0.00%) 3155.12 ( -0.16%) 3164.29 ( 0.13%) 3401.23 ( 7.63%)
Triad 35M 3531.94 ( 0.00%) 3523.24 ( -0.25%) 3523.71 ( -0.23%) 3861.73 ( 9.34%)
Add 42M 3803.39 ( 0.00%) 3777.52 ( -0.68%) 3789.36 ( -0.37%) 4014.25 ( 5.54%)
Copy 42M 3360.64 ( 0.00%) 3351.85 ( -0.26%) 3348.05 ( -0.37%) 3484.10 ( 3.67%)
Scale 42M 3158.64 ( 0.00%) 3159.51 ( 0.03%) 3157.44 ( -0.04%) 3400.86 ( 7.67%)
Triad 42M 3529.99 ( 0.00%) 3515.82 ( -0.40%) 3527.70 ( -0.06%) 3860.66 ( 9.37%)
Add 56M 3778.07 ( 0.00%) 3806.79 ( 0.76%) 3789.54 ( 0.30%) 3984.74 ( 5.47%)
Copy 56M 3348.68 ( 0.00%) 3361.92 ( 0.40%) 3282.70 ( -1.97%) 3473.71 ( 3.73%)
Scale 56M 3169.25 ( 0.00%) 3160.16 ( -0.29%) 3097.85 ( -2.25%) 3394.91 ( 7.12%)
Triad 56M 3517.62 ( 0.00%) 3534.72 ( 0.49%) 3529.84 ( 0.35%) 3853.46 ( 9.55%)
Add 71M 3811.71 ( 0.00%) 3785.42 ( -0.69%) 3786.40 ( -0.66%) 3975.32 ( 4.29%)
Copy 71M 3370.59 ( 0.00%) 3350.70 ( -0.59%) 3351.49 ( -0.57%) 3476.33 ( 3.14%)
Scale 71M 3168.70 ( 0.00%) 3162.75 ( -0.19%) 3172.31 ( 0.11%) 3397.66 ( 7.23%)
Triad 71M 3536.14 ( 0.00%) 3522.81 ( -0.38%) 3525.17 ( -0.31%) 3855.20 ( 9.02%)
Add 85M 3805.94 ( 0.00%) 3796.04 ( -0.26%) 3793.99 ( -0.31%) 4024.25 ( 5.74%)
Copy 85M 3354.76 ( 0.00%) 3355.38 ( 0.02%) 3364.42 ( 0.29%) 3482.99 ( 3.82%)
Scale 85M 3162.20 ( 0.00%) 3171.71 ( 0.30%) 3146.74 ( -0.49%) 3405.10 ( 7.68%)
Triad 85M 3538.76 ( 0.00%) 3528.62 ( -0.29%) 3524.00 ( -0.42%) 3857.08 ( 9.00%)
Add 113M 3803.66 ( 0.00%) 3791.42 ( -0.32%) 3802.68 ( -0.03%) 4050.85 ( 6.50%)
Copy 113M 3348.32 ( 0.00%) 3363.66 ( 0.46%) 3355.31 ( 0.21%) 3488.14 ( 4.18%)
Scale 113M 3177.09 ( 0.00%) 3167.40 ( -0.30%) 3160.93 ( -0.51%) 3399.56 ( 7.00%)
Triad 113M 3536.06 ( 0.00%) 3529.99 ( -0.17%) 3529.75 ( -0.18%) 3860.58 ( 9.18%)
Add 142M 3814.65 ( 0.00%) 3795.83 ( -0.49%) 3794.67 ( -0.52%) 4001.91 ( 4.91%)
Copy 142M 3353.31 ( 0.00%) 3357.70 ( 0.13%) 3362.35 ( 0.27%) 3483.25 ( 3.87%)
Scale 142M 3186.05 ( 0.00%) 3156.22 ( -0.94%) 3149.30 ( -1.15%) 3403.12 ( 6.81%)
Triad 142M 3545.41 ( 0.00%) 3526.16 ( -0.54%) 3523.67 ( -0.61%) 3864.64 ( 9.00%)
Add 170M 3787.71 ( 0.00%) 3788.86 ( 0.03%) 3812.66 ( 0.66%) 3990.36 ( 5.35%)
Copy 170M 3351.50 ( 0.00%) 3353.34 ( 0.05%) 3368.86 ( 0.52%) 3480.04 ( 3.84%)
Scale 170M 3158.38 ( 0.00%) 3165.12 ( 0.21%) 3163.39 ( 0.16%) 3399.74 ( 7.64%)
Triad 170M 3521.84 ( 0.00%) 3527.88 ( 0.17%) 3538.46 ( 0.47%) 3859.29 ( 9.58%)
Add 227M 3794.46 ( 0.00%) 3804.21 ( 0.26%) 3789.75 ( -0.12%) 3996.34 ( 5.32%)
Copy 227M 3368.15 ( 0.00%) 3365.69 ( -0.07%) 3353.55 ( -0.43%) 3477.20 ( 3.24%)
Scale 227M 3160.18 ( 0.00%) 3155.38 ( -0.15%) 3152.46 ( -0.24%) 3408.65 ( 7.86%)
Triad 227M 3525.39 ( 0.00%) 3532.53 ( 0.20%) 3518.85 ( -0.19%) 3857.57 ( 9.42%)
Add 284M 3804.29 ( 0.00%) 3806.62 ( 0.06%) 3798.59 ( -0.15%) 3957.29 ( 4.02%)
Copy 284M 3366.21 ( 0.00%) 3355.53 ( -0.32%) 3362.62 ( -0.11%) 3469.98 ( 3.08%)
Scale 284M 3174.61 ( 0.00%) 3161.86 ( -0.40%) 3171.81 ( -0.09%) 3394.82 ( 6.94%)
Triad 284M 3538.50 ( 0.00%) 3535.29 ( -0.09%) 3532.22 ( -0.18%) 3851.68 ( 8.85%)
Add 341M 3805.26 ( 0.00%) 3788.76 ( -0.43%) 3787.26 ( -0.47%) 3977.29 ( 4.52%)
Copy 341M 3366.98 ( 0.00%) 3361.62 ( -0.16%) 3357.70 ( -0.28%) 3471.49 ( 3.10%)
Scale 341M 3159.11 ( 0.00%) 3157.50 ( -0.05%) 3150.75 ( -0.26%) 3396.89 ( 7.53%)
Triad 341M 3530.80 ( 0.00%) 3522.61 ( -0.23%) 3518.81 ( -0.34%) 3854.18 ( 9.16%)
Add 455M 3791.15 ( 0.00%) 3794.25 ( 0.08%) 3796.21 ( 0.13%) 4023.51 ( 6.13%)
Copy 455M 3353.30 ( 0.00%) 3356.46 ( 0.09%) 3356.24 ( 0.09%) 3483.58 ( 3.88%)
Scale 455M 3161.21 ( 0.00%) 3163.74 ( 0.08%) 3156.56 ( -0.15%) 3400.35 ( 7.56%)
Triad 455M 3527.90 ( 0.00%) 3526.21 ( -0.05%) 3523.52 ( -0.12%) 3859.30 ( 9.39%)
Add 568M 3779.79 ( 0.00%) 3791.20 ( 0.30%) 3794.86 ( 0.40%) 4030.14 ( 6.62%)
Copy 568M 3349.93 ( 0.00%) 3354.29 ( 0.13%) 3349.21 ( -0.02%) 3481.71 ( 3.93%)
Scale 568M 3163.69 ( 0.00%) 3161.94 ( -0.06%) 3168.22 ( 0.14%) 3399.29 ( 7.45%)
Triad 568M 3518.65 ( 0.00%) 3526.50 ( 0.22%) 3532.29 ( 0.39%) 3857.38 ( 9.63%)
Add 682M 3801.06 ( 0.00%) 3807.09 ( 0.16%) 3803.26 ( 0.06%) 3995.04 ( 5.10%)
Copy 682M 3363.64 ( 0.00%) 3365.88 ( 0.07%) 3363.97 ( 0.01%) 3475.74 ( 3.33%)
Scale 682M 3151.89 ( 0.00%) 3169.84 ( 0.57%) 3162.50 ( 0.34%) 3400.35 ( 7.88%)
Triad 682M 3528.97 ( 0.00%) 3535.76 ( 0.19%) 3530.60 ( 0.05%) 3860.42 ( 9.39%)
Add 910M 3778.97 ( 0.00%) 3784.80 ( 0.15%) 3782.46 ( 0.09%) 3965.85 ( 4.95%)
Copy 910M 3345.09 ( 0.00%) 3347.40 ( 0.07%) 3354.06 ( 0.27%) 3471.09 ( 3.77%)
Scale 910M 3164.46 ( 0.00%) 3159.83 ( -0.15%) 3147.78 ( -0.53%) 3392.25 ( 7.20%)
Triad 910M 3516.19 ( 0.00%) 3518.54 ( 0.07%) 3516.70 ( 0.01%) 3848.91 ( 9.46%)
Add 1137M 3812.17 ( 0.00%) 3808.22 ( -0.10%) 3794.70 ( -0.46%) 3969.04 ( 4.11%)
Copy 1137M 3367.52 ( 0.00%) 3380.77 ( 0.39%) 3353.99 ( -0.40%) 3473.60 ( 3.15%)
Scale 1137M 3158.62 ( 0.00%) 3160.72 ( 0.07%) 3159.71 ( 0.03%) 3397.40 ( 7.56%)
Triad 1137M 3536.97 ( 0.00%) 3533.26 ( -0.10%) 3522.25 ( -0.42%) 3856.24 ( 9.03%)
Add 1365M 3806.51 ( 0.00%) 3799.39 ( -0.19%) 3785.71 ( -0.55%) 3965.55 ( 4.18%)
Copy 1365M 3360.43 ( 0.00%) 3356.22 ( -0.12%) 3346.74 ( -0.41%) 3469.44 ( 3.24%)
Scale 1365M 3155.95 ( 0.00%) 3160.66 ( 0.15%) 3163.20 ( 0.23%) 3392.79 ( 7.50%)
Triad 1365M 3534.18 ( 0.00%) 3538.56 ( 0.12%) 3524.20 ( -0.28%) 3849.29 ( 8.92%)
Add 1820M 3797.86 ( 0.00%) 3801.04 ( 0.08%) 3796.84 ( -0.03%) 4014.92 ( 5.72%)
Copy 1820M 3362.09 ( 0.00%) 3360.66 ( -0.04%) 3352.27 ( -0.29%) 3483.55 ( 3.61%)
Scale 1820M 3170.20 ( 0.00%) 3159.70 ( -0.33%) 3159.59 ( -0.33%) 3400.90 ( 7.28%)
Triad 1820M 3531.00 ( 0.00%) 3531.65 ( 0.02%) 3528.99 ( -0.06%) 3862.69 ( 9.39%)
Add 2275M 3810.31 ( 0.00%) 3797.19 ( -0.34%) 3785.76 ( -0.64%) 3913.43 ( 2.71%)
Copy 2275M 3373.60 ( 0.00%) 3355.79 ( -0.53%) 3340.74 ( -0.97%) 3456.16 ( 2.45%)
Scale 2275M 3174.64 ( 0.00%) 3157.28 ( -0.55%) 3150.71 ( -0.75%) 3383.35 ( 6.57%)
Triad 2275M 3537.57 ( 0.00%) 3529.60 ( -0.23%) 3518.91 ( -0.53%) 3837.46 ( 8.48%)
Add 2730M 3801.09 ( 0.00%) 3796.96 ( -0.11%) 3800.62 ( -0.01%) 4008.15 ( 5.45%)
Copy 2730M 3357.18 ( 0.00%) 3351.88 ( -0.16%) 3358.55 ( 0.04%) 3482.93 ( 3.75%)
Scale 2730M 3177.66 ( 0.00%) 3159.95 ( -0.56%) 3167.56 ( -0.32%) 3401.39 ( 7.04%)
Triad 2730M 3539.59 ( 0.00%) 3532.29 ( -0.21%) 3531.57 ( -0.23%) 3863.61 ( 9.15%)
Add 3640M 3816.88 ( 0.00%) 3809.59 ( -0.19%) 3805.49 ( -0.30%) 3991.09 ( 4.56%)
Copy 3640M 3375.91 ( 0.00%) 3367.14 ( -0.26%) 3349.94 ( -0.77%) 3477.90 ( 3.02%)
Scale 3640M 3167.22 ( 0.00%) 3167.15 ( -0.00%) 3166.88 ( -0.01%) 3398.62 ( 7.31%)
Triad 3640M 3546.45 ( 0.00%) 3536.31 ( -0.29%) 3539.15 ( -0.21%) 3860.10 ( 8.84%)
Add 4551M 3799.05 ( 0.00%) 3778.41 ( -0.54%) 3784.31 ( -0.39%) 3976.60 ( 4.67%)
Copy 4551M 3355.66 ( 0.00%) 3351.03 ( -0.14%) 3355.51 ( -0.00%) 3482.15 ( 3.77%)
Scale 4551M 3171.91 ( 0.00%) 3156.10 ( -0.50%) 3166.90 ( -0.16%) 3401.11 ( 7.23%)
Triad 4551M 3531.61 ( 0.00%) 3514.39 ( -0.49%) 3516.99 ( -0.41%) 3861.99 ( 9.35%)
Add 5461M 3801.60 ( 0.00%) 3807.33 ( 0.15%) 3810.09 ( 0.22%) 3950.47 ( 3.92%)
Copy 5461M 3360.29 ( 0.00%) 3372.50 ( 0.36%) 3357.41 ( -0.09%) 3470.96 ( 3.29%)
Scale 5461M 3161.18 ( 0.00%) 3159.49 ( -0.05%) 3163.35 ( 0.07%) 3394.10 ( 7.37%)
Triad 5461M 3532.35 ( 0.00%) 3534.62 ( 0.06%) 3539.14 ( 0.19%) 3852.67 ( 9.07%)
Add 7281M 3800.80 ( 0.00%) 3805.50 ( 0.12%) 3787.10 ( -0.36%) 4042.38 ( 6.36%)
Copy 7281M 3359.99 ( 0.00%) 3362.34 ( 0.07%) 3354.09 ( -0.18%) 3487.91 ( 3.81%)
Scale 7281M 3168.68 ( 0.00%) 3165.30 ( -0.11%) 3154.04 ( -0.46%) 3400.69 ( 7.32%)
Triad 7281M 3533.59 ( 0.00%) 3537.71 ( 0.12%) 3518.15 ( -0.44%) 3862.47 ( 9.31%)
Add 9102M 3790.67 ( 0.00%) 3797.98 ( 0.19%) 3808.76 ( 0.48%) 3995.83 ( 5.41%)
Copy 9102M 3345.80 ( 0.00%) 3360.87 ( 0.45%) 3360.86 ( 0.45%) 3477.97 ( 3.95%)
Scale 9102M 3174.65 ( 0.00%) 3160.05 ( -0.46%) 3164.47 ( -0.32%) 3399.24 ( 7.07%)
Triad 9102M 3529.51 ( 0.00%) 3533.84 ( 0.12%) 3533.79 ( 0.12%) 3859.38 ( 9.35%)
Add 10922M 3807.96 ( 0.00%) 3803.49 ( -0.12%) 3809.65 ( 0.04%) 4002.50 ( 5.11%)
Copy 10922M 3350.99 ( 0.00%) 3352.21 ( 0.04%) 3359.79 ( 0.26%) 3477.24 ( 3.77%)
Scale 10922M 3164.74 ( 0.00%) 3170.89 ( 0.19%) 3167.50 ( 0.09%) 3395.79 ( 7.30%)
Triad 10922M 3536.69 ( 0.00%) 3532.25 ( -0.13%) 3538.25 ( 0.04%) 3856.99 ( 9.06%)
Add 14563M 3786.28 ( 0.00%) 3770.86 ( -0.41%) 3789.66 ( 0.09%) 3988.87 ( 5.35%)
Copy 14563M 3352.51 ( 0.00%) 3339.40 ( -0.39%) 3351.25 ( -0.04%) 3479.41 ( 3.79%)
Scale 14563M 3171.95 ( 0.00%) 3151.73 ( -0.64%) 3154.62 ( -0.55%) 3399.56 ( 7.18%)
Triad 14563M 3522.50 ( 0.00%) 3511.16 ( -0.32%) 3521.94 ( -0.02%) 3858.30 ( 9.53%)
Add 18204M 3809.56 ( 0.00%) 3799.32 ( -0.27%) 3800.40 ( -0.24%) 3975.64 ( 4.36%)
Copy 18204M 3365.06 ( 0.00%) 3360.08 ( -0.15%) 3360.78 ( -0.13%) 3478.50 ( 3.37%)
Scale 18204M 3171.25 ( 0.00%) 3147.35 ( -0.75%) 3160.06 ( -0.35%) 3402.14 ( 7.28%)
Triad 18204M 3539.90 ( 0.00%) 3526.72 ( -0.37%) 3529.69 ( -0.29%) 3863.45 ( 9.14%)
Add 21845M 3798.46 ( 0.00%) 3775.06 ( -0.62%) 3800.56 ( 0.06%) 3971.45 ( 4.55%)
Copy 21845M 3362.14 ( 0.00%) 3354.93 ( -0.21%) 3358.40 ( -0.11%) 3468.39 ( 3.16%)
Scale 21845M 3170.99 ( 0.00%) 3164.52 ( -0.20%) 3167.92 ( -0.10%) 3391.02 ( 6.94%)
Triad 21845M 3534.49 ( 0.00%) 3511.51 ( -0.65%) 3534.65 ( 0.00%) 3847.34 ( 8.85%)
Add 29127M 3819.69 ( 0.00%) 3809.20 ( -0.27%) 3798.24 ( -0.56%) 4004.57 ( 4.84%)
Copy 29127M 3384.67 ( 0.00%) 3365.17 ( -0.58%) 3353.97 ( -0.91%) 3478.36 ( 2.77%)
Scale 29127M 3158.68 ( 0.00%) 3162.35 ( 0.12%) 3171.84 ( 0.42%) 3396.96 ( 7.54%)
Triad 29127M 3538.17 ( 0.00%) 3539.05 ( 0.02%) 3530.30 ( -0.22%) 3854.82 ( 8.95%)
Add 36408M 3806.95 ( 0.00%) 3796.64 ( -0.27%) 3802.86 ( -0.11%) 4014.22 ( 5.44%)
Copy 36408M 3361.11 ( 0.00%) 3358.35 ( -0.08%) 3358.30 ( -0.08%) 3481.66 ( 3.59%)
Scale 36408M 3165.87 ( 0.00%) 3165.94 ( 0.00%) 3176.78 ( 0.34%) 3400.27 ( 7.40%)
Triad 36408M 3536.86 ( 0.00%) 3529.81 ( -0.20%) 3538.19 ( 0.04%) 3862.39 ( 9.20%)
Add 43690M 3799.39 ( 0.00%) 3806.60 ( 0.19%) 3803.09 ( 0.10%) 3989.60 ( 5.01%)
Copy 43690M 3359.26 ( 0.00%) 3384.76 ( 0.76%) 3359.11 ( -0.00%) 3478.31 ( 3.54%)
Scale 43690M 3175.35 ( 0.00%) 3164.08 ( -0.36%) 3161.71 ( -0.43%) 3400.39 ( 7.09%)
Triad 43690M 3535.26 ( 0.00%) 3534.77 ( -0.01%) 3531.62 ( -0.10%) 3861.40 ( 9.23%)
Add 58254M 3799.66 ( 0.00%) 3809.97 ( 0.27%) 3800.36 ( 0.02%) 3993.44 ( 5.10%)
Copy 58254M 3355.12 ( 0.00%) 3367.42 ( 0.37%) 3357.51 ( 0.07%) 3485.58 ( 3.89%)
Scale 58254M 3170.94 ( 0.00%) 3165.55 ( -0.17%) 3170.76 ( -0.01%) 3406.36 ( 7.42%)
Triad 58254M 3537.26 ( 0.00%) 3539.78 ( 0.07%) 3528.61 ( -0.24%) 3867.25 ( 9.33%)
Add 72817M 3815.26 ( 0.00%) 3798.60 ( -0.44%) 3802.47 ( -0.34%) 4017.50 ( 5.30%)
Copy 72817M 3362.18 ( 0.00%) 3355.17 ( -0.21%) 3356.95 ( -0.16%) 3484.11 ( 3.63%)
Scale 72817M 3175.73 ( 0.00%) 3155.96 ( -0.62%) 3162.10 ( -0.43%) 3399.64 ( 7.05%)
Triad 72817M 3546.44 ( 0.00%) 3528.61 ( -0.50%) 3531.39 ( -0.42%) 3860.93 ( 8.87%)
Add 87381M 3519.93 ( 0.00%) 3511.38 ( -0.24%) 3501.07 ( -0.54%) 3842.46 ( 9.16%)
Copy 87381M 3175.29 ( 0.00%) 3168.75 ( -0.21%) 3166.12 ( -0.29%) 3271.07 ( 3.02%)
Scale 87381M 2848.76 ( 0.00%) 2842.46 ( -0.22%) 2840.72 ( -0.28%) 3184.16 ( 11.77%)
Triad 87381M 3465.19 ( 0.00%) 3461.85 ( -0.10%) 3451.36 ( -0.40%) 3786.76 ( 9.28%)
This is a memory streaming benchmark that makes the remote costs a bit
more visible.
3.13.0-rc3 3.13.0-rc3 3.13.0-rc3 3.13.0-rc3
vanillainstrument-v5r1lruslabonly-v1r2 local-v1r2
NUMA alloc hit 1238820 1347097 1432817 2103498
NUMA alloc miss 691541 757204 667484 0
NUMA interleave hit 0 0 0 0
NUMA alloc local 1238815 1347095 1432815 2103493
NUMA page range updates 24916702 24987450 25104153 24929595
NUMA huge PMD updates 48025 48138 48364 48025
NUMA PTE updates 375927 388932 390149 388820
NUMA hint faults 373397 48138 48364 48025
NUMA hint local faults 142051 12653 12667 48025
NUMA hint local percent 38 26 26 100
NUMA pages migrated 83407 68608 86528 0
AutoNUMA cost 2042 416 419 414
NUMA miss rates sepak for themself. I also included the NUMA balancing
stats and the number of hinting faults that are local and number of pages
migrated is also interesting.
pft
3.13.0-rc3 3.13.0-rc3 3.13.0-rc3 3.13.0-rc3
vanilla instrument-v5r1 lruslabonly-v1r2 local-v1r2
User 1 0.6980 ( 0.00%) 0.7090 ( -1.58%) 0.7210 ( -3.30%) 0.6760 ( 3.15%)
User 2 0.7040 ( 0.00%) 0.6970 ( 0.99%) 0.6640 ( 5.68%) 0.6590 ( 6.39%)
User 3 0.6910 ( 0.00%) 0.7270 ( -5.21%) 0.7450 ( -7.81%) 0.7070 ( -2.32%)
User 4 0.7250 ( 0.00%) 0.7160 ( 1.24%) 0.7260 ( -0.14%) 0.7530 ( -3.86%)
User 5 0.7590 ( 0.00%) 0.7790 ( -2.64%) 0.7960 ( -4.87%) 0.7610 ( -0.26%)
User 6 0.8130 ( 0.00%) 0.8180 ( -0.62%) 0.7860 ( 3.32%) 0.8030 ( 1.23%)
User 7 0.8210 ( 0.00%) 0.8240 ( -0.37%) 0.8050 ( 1.95%) 0.7690 ( 6.33%)
User 8 0.8390 ( 0.00%) 0.8410 ( -0.24%) 0.7870 ( 6.20%) 0.7780 ( 7.27%)
System 1 9.1230 ( 0.00%) 9.0640 ( 0.65%) 9.6980 ( -6.30%) 8.5410 ( 6.38%)
System 2 9.3990 ( 0.00%) 9.3630 ( 0.38%) 9.6880 ( -3.07%) 8.5570 ( 8.96%)
System 3 9.1460 ( 0.00%) 9.0930 ( 0.58%) 9.3010 ( -1.69%) 8.6700 ( 5.20%)
System 4 8.9160 ( 0.00%) 8.8630 ( 0.59%) 8.9340 ( -0.20%) 8.7370 ( 2.01%)
System 5 9.5900 ( 0.00%) 9.4450 ( 1.51%) 9.5940 ( -0.04%) 8.8960 ( 7.24%)
System 6 9.8640 ( 0.00%) 9.7130 ( 1.53%) 9.9510 ( -0.88%) 9.1420 ( 7.32%)
System 7 9.9860 ( 0.00%) 9.9050 ( 0.81%) 9.9830 ( 0.03%) 9.2490 ( 7.38%)
System 8 9.8570 ( 0.00%) 10.0090 ( -1.54%) 10.0430 ( -1.89%) 9.3030 ( 5.62%)
Elapsed 1 9.8240 ( 0.00%) 9.7790 ( 0.46%) 10.4280 ( -6.15%) 9.2280 ( 6.07%)
Elapsed 2 5.0870 ( 0.00%) 5.0480 ( 0.77%) 5.2190 ( -2.59%) 4.6360 ( 8.87%)
Elapsed 3 3.3220 ( 0.00%) 3.3040 ( 0.54%) 3.3670 ( -1.35%) 3.1430 ( 5.39%)
Elapsed 4 2.4440 ( 0.00%) 2.4340 ( 0.41%) 2.4450 ( -0.04%) 2.4010 ( 1.76%)
Elapsed 5 2.1500 ( 0.00%) 2.1340 ( 0.74%) 2.1590 ( -0.42%) 2.0020 ( 6.88%)
Elapsed 6 1.8290 ( 0.00%) 1.8110 ( 0.98%) 1.8460 ( -0.93%) 1.6910 ( 7.55%)
Elapsed 7 1.5760 ( 0.00%) 1.5740 ( 0.13%) 1.5600 ( 1.02%) 1.4570 ( 7.55%)
Elapsed 8 1.3660 ( 0.00%) 1.3750 ( -0.66%) 1.3840 ( -1.32%) 1.2720 ( 6.88%)
Faults/cpu 1 336505.5875 ( 0.00%) 338169.9002 ( 0.49%) 317186.6996 ( -5.74%) 358456.5721 ( 6.52%)
Faults/cpu 2 327139.2186 ( 0.00%) 328492.4614 ( 0.41%) 319274.5257 ( -2.40%) 358628.2150 ( 9.63%)
Faults/cpu 3 336004.1324 ( 0.00%) 336567.6552 ( 0.17%) 328975.0655 ( -2.09%) 352460.9626 ( 4.90%)
Faults/cpu 4 342824.1564 ( 0.00%) 345092.8897 ( 0.66%) 342110.6189 ( -0.21%) 348245.2828 ( 1.58%)
Faults/cpu 5 319553.7707 ( 0.00%) 323342.1439 ( 1.19%) 318221.0947 ( -0.42%) 342196.2266 ( 7.09%)
Faults/cpu 6 309614.5554 ( 0.00%) 313909.9679 ( 1.39%) 307872.9151 ( -0.56%) 332404.7055 ( 7.36%)
Faults/cpu 7 306159.2969 ( 0.00%) 308038.1690 ( 0.61%) 306307.5499 ( 0.05%) 329872.4584 ( 7.75%)
Faults/cpu 8 309077.4966 ( 0.00%) 304874.1843 ( -1.36%) 305342.7590 ( -1.21%) 328041.6604 ( 6.14%)
Faults/sec 1 336364.5575 ( 0.00%) 337965.2381 ( 0.48%) 316902.8780 ( -5.79%) 358111.9993 ( 6.47%)
Faults/sec 2 649713.2290 ( 0.00%) 654535.5476 ( 0.74%) 633369.6295 ( -2.52%) 712772.6198 ( 9.71%)
Faults/sec 3 994812.3119 ( 0.00%) 1000190.1734 ( 0.54%) 981316.5256 ( -1.36%) 1051712.4141 ( 5.72%)
Faults/sec 4 1352137.4832 ( 0.00%) 1359242.0027 ( 0.53%) 1351401.4285 ( -0.05%) 1376465.2565 ( 1.80%)
Faults/sec 5 1538115.0421 ( 0.00%) 1550443.5505 ( 0.80%) 1530614.5827 ( -0.49%) 1651864.2216 ( 7.40%)
Faults/sec 6 1807211.7324 ( 0.00%) 1826306.7214 ( 1.06%) 1790976.0367 ( -0.90%) 1955407.8574 ( 8.20%)
Faults/sec 7 2101840.1872 ( 0.00%) 2101627.1857 ( -0.01%) 2117333.0681 ( 0.74%) 2269862.7330 ( 7.99%)
Faults/sec 8 2421813.7208 ( 0.00%) 2407803.4867 ( -0.58%) 2393045.9288 ( -1.19%) 2601789.0136 ( 7.43%)
Local allocations help fault rate microbenchmarl
3.13.0-rc3 3.13.0-rc3 3.13.0-rc3 3.13.0-rc3
vanillainstrument-v5r1lruslabonly-v1r2 local-v1r2
User 60.57 62.13 61.33 60.06
System 868.16 862.63 881.63 810.32
Elapsed 336.19 336.05 346.70 317.59
system CPU down, presuably all the system CPU usage drops are related to
zeroing of memory.
3.13.0-rc3 3.13.0-rc3 3.13.0-rc3 3.13.0-rc3
vanillainstrument-v5r1lruslabonly-v1r2 local-v1r2
NUMA alloc hit 187243902 187602290 188017672 264999137
NUMA alloc miss 77736695 77400777 76985460 0
NUMA interleave hit 0 0 0 0
NUMA alloc local 187243902 187602290 188017672 264999135
NUMA page range updates 136246380 135333180 468517162 425261524
NUMA huge PMD updates 0 0 0 0
NUMA PTE updates 136246380 135333180 468517162 425261524
NUMA hint faults 512 0 0 0
NUMA hint local faults 248 0 0 0
NUMA hint local percent 48 100 100 100
NUMA pages migrated 169 0 0 0
AutoNUMA cost 956 947 3279 2976
Does not need spelling out. No huge PMD updates is a curiousity worth looking
at some other time.
ebizzy
3.13.0-rc3 3.13.0-rc3 3.13.0-rc3 3.13.0-rc3
vanilla instrument-v5r1 lruslabonly-v1r2 local-v1r2
Mean 1 3213.33 ( 0.00%) 3204.33 ( -0.28%) 3188.00 ( -0.79%) 3195.33 ( -0.56%)
Mean 2 2291.33 ( 0.00%) 2324.67 ( 1.45%) 2328.00 ( 1.60%) 2350.33 ( 2.57%)
Mean 3 2234.67 ( 0.00%) 2264.67 ( 1.34%) 2255.00 ( 0.91%) 2283.00 ( 2.16%)
Mean 4 2224.33 ( 0.00%) 2253.67 ( 1.32%) 2252.33 ( 1.26%) 2281.00 ( 2.55%)
Mean 5 2256.33 ( 0.00%) 2276.00 ( 0.87%) 2241.00 ( -0.68%) 2234.33 ( -0.98%)
Mean 6 2233.00 ( 0.00%) 2265.67 ( 1.46%) 2238.67 ( 0.25%) 2258.00 ( 1.12%)
Mean 7 2212.33 ( 0.00%) 2242.67 ( 1.37%) 2251.33 ( 1.76%) 2258.67 ( 2.09%)
Mean 8 2224.67 ( 0.00%) 2241.67 ( 0.76%) 2215.33 ( -0.42%) 2240.67 ( 0.72%)
Mean 12 2213.33 ( 0.00%) 2246.00 ( 1.48%) 2257.00 ( 1.97%) 2263.67 ( 2.27%)
Mean 16 2221.00 ( 0.00%) 2263.67 ( 1.92%) 2257.67 ( 1.65%) 2254.00 ( 1.49%)
Mean 20 2215.00 ( 0.00%) 2268.67 ( 2.42%) 2262.67 ( 2.15%) 2282.67 ( 3.05%)
Mean 24 2175.00 ( 0.00%) 2204.00 ( 1.33%) 2232.67 ( 2.65%) 2224.00 ( 2.25%)
Mean 28 2110.00 ( 0.00%) 2142.33 ( 1.53%) 2164.00 ( 2.56%) 2182.33 ( 3.43%)
Mean 32 2077.67 ( 0.00%) 2089.33 ( 0.56%) 2074.33 ( -0.16%) 2132.67 ( 2.65%)
Mean 36 2016.33 ( 0.00%) 2025.33 ( 0.45%) 2040.33 ( 1.19%) 2096.33 ( 3.97%)
Mean 40 1984.00 ( 0.00%) 1983.67 ( -0.02%) 2002.67 ( 0.94%) 2067.00 ( 4.18%)
Mean 44 1943.33 ( 0.00%) 1960.33 ( 0.87%) 1961.33 ( 0.93%) 2027.33 ( 4.32%)
Mean 48 1925.00 ( 0.00%) 1938.33 ( 0.69%) 1942.00 ( 0.88%) 2024.00 ( 5.14%)
Stddev 1 25.42 ( 0.00%) 43.52 (-71.21%) 32.54 (-27.99%) 74.42 (-192.77%)
Stddev 2 29.68 ( 0.00%) 2.62 ( 91.16%) 22.73 ( 23.41%) 20.53 ( 30.82%)
Stddev 3 18.15 ( 0.00%) 11.15 ( 38.60%) 6.16 ( 66.04%) 0.82 ( 95.50%)
Stddev 4 41.28 ( 0.00%) 8.73 ( 78.85%) 4.64 ( 88.75%) 6.38 ( 84.55%)
Stddev 5 27.18 ( 0.00%) 30.41 (-11.87%) 28.25 ( -3.92%) 31.08 (-14.35%)
Stddev 6 10.80 ( 0.00%) 20.24 (-87.36%) 22.10 (-104.57%) 29.70 (-174.95%)
Stddev 7 23.10 ( 0.00%) 7.59 ( 67.16%) 21.56 ( 6.66%) 19.15 ( 17.08%)
Stddev 8 3.68 ( 0.00%) 8.65 (-135.04%) 26.23 (-612.53%) 27.79 (-654.77%)
Stddev 12 23.84 ( 0.00%) 10.03 ( 57.91%) 4.97 ( 79.16%) 4.99 ( 79.07%)
Stddev 16 20.22 ( 0.00%) 32.11 (-58.83%) 3.09 ( 84.71%) 4.97 ( 75.43%)
Stddev 20 3.74 ( 0.00%) 28.94 (-673.47%) 36.02 (-862.72%) 16.94 (-352.68%)
Stddev 24 18.18 ( 0.00%) 27.90 (-53.45%) 21.36 (-17.46%) 9.90 ( 45.56%)
Stddev 28 11.78 ( 0.00%) 1.70 ( 85.57%) 23.85 (-102.51%) 46.94 (-298.64%)
Stddev 32 9.74 ( 0.00%) 20.27 (-108.09%) 10.87 (-11.62%) 8.58 ( 11.96%)
Stddev 36 3.86 ( 0.00%) 8.50 (-120.24%) 11.44 (-196.50%) 21.25 (-450.71%)
Stddev 40 14.17 ( 0.00%) 2.05 ( 85.49%) 7.04 ( 50.31%) 7.12 ( 49.75%)
Stddev 44 7.54 ( 0.00%) 2.87 ( 61.98%) 2.05 ( 72.76%) 2.49 ( 66.93%)
Stddev 48 2.94 ( 0.00%) 5.44 (-84.67%) 7.07 (-140.19%) 15.64 (-431.33%)
Ran ebizzy because it double up as a page allocation micro benchmark that
hits page faults differently to PFT. Looks like an ok gain but the stddev
is high and would need to be stabilised to draw a solid conclusion from.
3.13.0-rc3 3.13.0-rc3 3.13.0-rc3 3.13.0-rc3
vanillainstrument-v5r1lruslabonly-v1r2 local-v1r2
User 491.24 497.42 497.39 505.94
System 874.62 871.88 872.00 867.24
Elapsed 1082.00 1082.28 1082.24 1082.18
3.13.0-rc3 3.13.0-rc3 3.13.0-rc3 3.13.0-rc3
vanillainstrument-v5r1lruslabonly-v1r2 local-v1r2
NUMA alloc hit 238904205 239454483 240328156 317773920
NUMA alloc miss 71969773 74642250 73502556 0
NUMA interleave hit 0 0 0 0
NUMA alloc local 238904198 239454483 240328156 317773916
NUMA page range updates 157577 731770 766010 781561
NUMA huge PMD updates 33 34 72 76
NUMA PTE updates 140714 714396 729218 742725
NUMA hint faults 39395 28 65 70
NUMA hint local faults 17294 12 43 46
NUMA hint local percent 43 42 66 65
NUMA pages migrated 7183 2048 3072 6656
AutoNUMA cost 198 5 5 5
Similarish observations.
None of these benchmarks do *anything* related to what commit 81c0a2bb was
supposed to fix. I just wanted to get the point across that our current
default behaviour sucks and we should revisit that decision.
My position is that by default we should only round-robin zones local to
the allocating process and that node round-robin is something that should
only be explicitely enabled.
I'm less sure about the round robin treatment of slab but am erring on
the side of historical behaviour until it is proven otherwise.
Documentation/sysctl/vm.txt | 28 +++++++++++
include/linux/mmzone.h | 2 +
include/linux/swap.h | 2 +
kernel/sysctl.c | 8 ++++
mm/page_alloc.c | 111 +++++++++++++++++++++++++++++++++++---------
5 files changed, 130 insertions(+), 21 deletions(-)
--
1.8.4
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