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Date: Mon, 31 Jan 2022 12:17:08 +0000
From: Mel Gorman <mgorman@...e.de>
To: Bharata B Rao <bharata@....com>
Cc: linux-kernel@...r.kernel.org, mingo@...hat.com,
peterz@...radead.org, juri.lelli@...hat.com,
vincent.guittot@...aro.org, dietmar.eggemann@....com,
rostedt@...dmis.org, bsegall@...gle.com, bristot@...hat.com,
dishaa.talreja@....com
Subject: Re: [RFC PATCH v0 0/3] sched/numa: Process Adaptive autoNUMA
On Fri, Jan 28, 2022 at 10:58:48AM +0530, Bharata B Rao wrote:
> Hi,
>
> This patchset implements an adaptive algorithm for calculating the autonuma
> scan period.
autonuma refers to the khugepaged-like approach to NUMA balancing that
was later superceded by NUMA Balancing (NUMAB) and is generally reflected
by the naming e.g. git grep -i autonuma and note how few references there
are to autonuma versus numab or "NUMA balancing". I know MMTests still
refers to AutoNUMA but mostly because at the time it was written,
autoNUMA was what was being evaluated and I never updated the naming.
> In the existing mechanism of scan period calculation,
>
> - scan period is derived from the per-thread stats.
> - static threshold (NUMA_PERIOD_THRESHOLD) is used for changing the
> scan rate.
>
> In this new approach (Process Adaptive autoNUMA or PAN), we gather NUMA
> fault stats at per-process level which allows for capturing the application
> behaviour better. In addition, the algorithm learns and adjusts the scan
> rate based on remote fault rate. By not sticking to a static threshold, the
> algorithm can respond better to different workload behaviours.
>
NUMA Balancing is concerned with threads (task) and an address space (mm)
so basing the naming on Address Space rather than process may be more
appropriate although I admit the acronym is not as snappy.
> Since the threads of a processes are already considered as a group,
> we add a bunch of metrics to the task's mm to track the various
> types of faults and derive the scan rate from them.
>
Enumerate the types of faults and note how the per-thread and
per-address-space metrics are related.
> The new per-process fault stats contribute only to the per-process
> scan period calculation, while the existing per-thread stats continue
> to contribute towards the numa_group stats which eventually
> determine the thresholds for migrating memory and threads
> across nodes.
>
> This patchset has been tested with a bunch of benchmarks on the
> following system:
>
Please include the comparisons of both the headline metrics and notes on
the change in scan rates in the changelog of the patch. Not all people
are access to Google drive and it is not guaranteed to remain forever.
Similarly, the leader is not guaranteed to appear in the git history
> ------------------------------------------------------
> % gain of PAN vs default (Avg of 3 runs)
> ------------------------------------------------------
> NAS-BT -0.17
> NAS-CG +9.39
> NAS-MG +8.19
> NAS-FT +2.23
> Hashjoin +0.58
> Graph500 +14.93
> Pagerank +0.37
> ------------------------------------------------------
> Default PAN %diff
> ------------------------------------------------------
> NUMA hint faults(Total of 3 runs)
> ------------------------------------------------------
> NAS-BT 758282358 539850429 +29
> NAS-CG 2179458823 1180301361 +46
> NAS-MG 517641172 346066391 +33
> NAS-FT 297044964 230033861 +23
> Hashjoin 201684863 268436275 -33
> Graph500 261808733 154338827 +41
> Pagerank 217917818 211260310 +03
> ------------------------------------------------------
> Migrations(Total of 3 runs)
> ------------------------------------------------------
> NAS-BT 106888517 86482076 +19
> NAS-CG 81191368 12859924 +84
> NAS-MG 83927451 39651254 +53
> NAS-FT 61807715 38934618 +37
> Hashjoin 45406983 59828843 -32
> Graph500 22798837 21560714 +05
> Pagerank 59072135 44968673 +24
> ------------------------------------------------------
>
> And here are some tests from a few microbenchmarks of mmtests suite.
> (The results are trimmed a bit here, the complete results can
> be viewed in the above mentioned link)
>
> Hackbench
> ---------
> hackbench-process-pipes
> hackbench hackbench
> default pan
> Min 256 23.5510 ( 0.00%) 23.1900 ( 1.53%)
> Amean 256 24.4604 ( 0.00%) 24.0353 * 1.74%*
> Stddev 256 0.4420 ( 0.00%) 0.7611 ( -72.18%)
> CoeffVar 256 1.8072 ( 0.00%) 3.1666 ( -75.22%)
> Max 256 25.4930 ( 0.00%) 30.5450 ( -19.82%)
> BAmean-50 256 24.1074 ( 0.00%) 23.6616 ( 1.85%)
> BAmean-95 256 24.4111 ( 0.00%) 23.9308 ( 1.97%)
> BAmean-99 256 24.4499 ( 0.00%) 23.9696 ( 1.96%)
>
> hackbench hackbench
> default pan
> Duration User 25810.02 25158.93
> Duration System 276322.70 271729.32
> Duration Elapsed 2707.75 2671.33
>
> hackbench hackbench
> default pan
> Ops NUMA alloc hit 1082415453.00 1088025994.00
> Ops NUMA alloc miss 0.00 0.00
> Ops NUMA interleave hit 0.00 0.00
> Ops NUMA alloc local 1082415441.00 1088025974.00
> Ops NUMA base-page range updates 33475.00 228900.00
> Ops NUMA PTE updates 33475.00 228900.00
> Ops NUMA PMD updates 0.00 0.00
> Ops NUMA hint faults 15758.00 222100.00
> Ops NUMA hint local faults % 15371.00 214570.00
> Ops NUMA hint local percent 97.54 96.61
> Ops NUMA pages migrated 235.00 4029.00
> Ops AutoNUMA cost 79.03 1112.18
>
Hackbench processes are generally short-lived enough that NUMA balancing
has a marginal impact. Interesting though that updates and hints were
increased by a lot relatively speaking.
> tbench
> ------
> tbench4
> tbench tbench
> default pan
> Hmean 1 436.89 ( 0.00%) 432.73 * -0.95%*
> Hmean 2 834.27 ( 0.00%) 848.11 * 1.66%*
> Hmean 4 1629.50 ( 0.00%) 1614.22 * -0.94%*
> Hmean 8 2944.06 ( 0.00%) 3031.66 * 2.98%*
> Hmean 16 5418.25 ( 0.00%) 5674.74 * 4.73%*
> Hmean 32 9959.60 ( 0.00%) 9009.82 * -9.54%*
> Hmean 64 13999.14 ( 0.00%) 12160.51 * -13.13%*
> Hmean 128 16797.09 ( 0.00%) 16506.14 * -1.73%*
> Hmean 256 25344.27 ( 0.00%) 25683.66 * 1.34%*
> Hmean 512 25289.03 ( 0.00%) 25513.77 * 0.89%*
> BHmean-50 1 437.13 ( 0.00%) 433.01 ( -0.94%)
> BHmean-50 2 836.35 ( 0.00%) 848.85 ( 1.49%)
> BHmean-50 4 1631.39 ( 0.00%) 1618.43 ( -0.79%)
> BHmean-50 8 2948.25 ( 0.00%) 3037.86 ( 3.04%)
> BHmean-50 16 5425.17 ( 0.00%) 5684.25 ( 4.78%)
> BHmean-50 32 9969.17 ( 0.00%) 9034.06 ( -9.38%)
> BHmean-50 64 14013.93 ( 0.00%) 12202.07 ( -12.93%)
> BHmean-50 128 16881.94 ( 0.00%) 16571.27 ( -1.84%)
> BHmean-50 256 25379.59 ( 0.00%) 25819.18 ( 1.73%)
> BHmean-50 512 25435.41 ( 0.00%) 25718.02 ( 1.11%)
> BHmean-95 1 436.92 ( 0.00%) 432.81 ( -0.94%)
> BHmean-95 2 834.59 ( 0.00%) 848.23 ( 1.63%)
> BHmean-95 4 1629.73 ( 0.00%) 1614.83 ( -0.91%)
> BHmean-95 8 2945.02 ( 0.00%) 3032.19 ( 2.96%)
> BHmean-95 16 5418.86 ( 0.00%) 5675.91 ( 4.74%)
> BHmean-95 32 9962.57 ( 0.00%) 9014.17 ( -9.52%)
> BHmean-95 64 14002.44 ( 0.00%) 12164.32 ( -13.13%)
> BHmean-95 128 16820.56 ( 0.00%) 16522.82 ( -1.77%)
> BHmean-95 256 25347.34 ( 0.00%) 25692.56 ( 1.36%)
> BHmean-95 512 25302.10 ( 0.00%) 25528.52 ( 0.89%)
> BHmean-99 1 436.90 ( 0.00%) 432.75 ( -0.95%)
> BHmean-99 2 834.35 ( 0.00%) 848.17 ( 1.66%)
> BHmean-99 4 1629.57 ( 0.00%) 1614.38 ( -0.93%)
> BHmean-99 8 2944.36 ( 0.00%) 3031.77 ( 2.97%)
> BHmean-99 16 5418.40 ( 0.00%) 5675.01 ( 4.74%)
> BHmean-99 32 9961.01 ( 0.00%) 9011.43 ( -9.53%)
> BHmean-99 64 14000.68 ( 0.00%) 12161.34 ( -13.14%)
> BHmean-99 128 16803.44 ( 0.00%) 16511.94 ( -1.73%)
> BHmean-99 256 25344.93 ( 0.00%) 25685.57 ( 1.34%)
> BHmean-99 512 25291.87 ( 0.00%) 25516.94 ( 0.89%)
>
> tbench tbench
> default pan
> Duration User 8482.50 8289.35
> Duration System 49462.63 49364.56
> Duration Elapsed 2217.10 2217.08
>
> tbench tbench
> default pan
> Ops NUMA alloc hit 388738400.00 378941469.00
> Ops NUMA alloc miss 0.00 0.00
> Ops NUMA interleave hit 0.00 0.00
> Ops NUMA alloc local 388738391.00 378941455.00
> Ops NUMA base-page range updates 266760.00 266275.00
> Ops NUMA PTE updates 266760.00 266275.00
> Ops NUMA PMD updates 0.00 0.00
> Ops NUMA hint faults 241547.00 257790.00
> Ops NUMA hint local faults % 145814.00 126410.00
> Ops NUMA hint local percent 60.37 49.04
> Ops NUMA pages migrated 51535.00 66083.00
> Ops AutoNUMA cost 1210.58 1292.07
>
Not much change.
> dbench
> ------
> dbench4 Latency
> dbench dbench
> default pan
> Amean latency-1 2.02 ( 0.00%) 2.05 * -1.52%*
> Amean latency-2 2.60 ( 0.00%) 2.55 * 1.64%*
> Amean latency-4 3.52 ( 0.00%) 3.56 * -1.17%*
> Amean latency-8 12.79 ( 0.00%) 11.83 * 7.49%*
> Amean latency-16 23.33 ( 0.00%) 19.09 * 18.19%*
> Amean latency-32 19.30 ( 0.00%) 18.83 * 2.43%*
> Amean latency-64 25.32 ( 0.00%) 24.30 * 4.00%*
> Amean latency-128 45.25 ( 0.00%) 42.93 * 5.13%*
> Amean latency-1024 0.00 ( 0.00%) 0.00 * 0.00%*
> BAmean-50 latency-1 1.65 ( 0.00%) 1.74 ( -5.16%)
> BAmean-50 latency-2 2.10 ( 0.00%) 2.10 ( -0.13%)
> BAmean-50 latency-4 2.65 ( 0.00%) 2.71 ( -2.28%)
> BAmean-50 latency-8 6.21 ( 0.00%) 4.64 ( 25.30%)
> BAmean-50 latency-16 17.64 ( 0.00%) 14.08 ( 20.16%)
> BAmean-50 latency-32 15.58 ( 0.00%) 15.90 ( -2.07%)
> BAmean-50 latency-64 20.76 ( 0.00%) 20.31 ( 2.15%)
> BAmean-50 latency-128 36.22 ( 0.00%) 34.85 ( 3.80%)
> BAmean-50 latency-1024 0.00 ( 0.00%) 0.00 ( 0.00%)
> BAmean-95 latency-1 1.88 ( 0.00%) 1.94 ( -3.17%)
> BAmean-95 latency-2 2.25 ( 0.00%) 2.26 ( -0.26%)
> BAmean-95 latency-4 3.00 ( 0.00%) 3.08 ( -2.71%)
> BAmean-95 latency-8 11.66 ( 0.00%) 10.03 ( 13.97%)
> BAmean-95 latency-16 22.30 ( 0.00%) 17.68 ( 20.73%)
> BAmean-95 latency-32 17.95 ( 0.00%) 17.70 ( 1.38%)
> BAmean-95 latency-64 23.57 ( 0.00%) 22.72 ( 3.62%)
> BAmean-95 latency-128 42.44 ( 0.00%) 39.96 ( 5.84%)
> BAmean-95 latency-1024 0.00 ( 0.00%) 0.00 ( 0.00%)
> BAmean-99 latency-1 1.90 ( 0.00%) 1.96 ( -3.30%)
> BAmean-99 latency-2 2.38 ( 0.00%) 2.37 ( 0.48%)
> BAmean-99 latency-4 3.24 ( 0.00%) 3.34 ( -3.26%)
> BAmean-99 latency-8 12.34 ( 0.00%) 10.71 ( 13.27%)
> BAmean-99 latency-16 22.79 ( 0.00%) 18.27 ( 19.82%)
> BAmean-99 latency-32 18.68 ( 0.00%) 18.32 ( 1.93%)
> BAmean-99 latency-64 24.69 ( 0.00%) 23.69 ( 4.06%)
> BAmean-99 latency-128 44.44 ( 0.00%) 42.15 ( 5.17%)
> BAmean-99 latency-1024 0.00 ( 0.00%) 0.00 ( 0.00%)
>
> dbench4 Throughput (misleading but traditional)
> dbench dbench
> default pan
> Hmean 1 505.12 ( 0.00%) 492.96 * -2.41%*
> Hmean 2 824.14 ( 0.00%) 824.06 * -0.01%*
> Hmean 4 1174.61 ( 0.00%) 1207.86 * 2.83%*
> Hmean 8 1665.10 ( 0.00%) 1667.27 * 0.13%*
> Hmean 16 2215.59 ( 0.00%) 2160.93 * -2.47%*
> Hmean 32 2727.05 ( 0.00%) 2633.26 * -3.44%*
> Hmean 64 3128.64 ( 0.00%) 3098.73 * -0.96%*
> Hmean 128 3282.89 ( 0.00%) 3340.26 * 1.75%*
> Hmean 1024 2551.02 ( 0.00%) 2559.41 * 0.33%*
> BHmean-50 1 509.87 ( 0.00%) 495.10 ( -2.90%)
> BHmean-50 2 829.35 ( 0.00%) 828.14 ( -0.15%)
> BHmean-50 4 1182.38 ( 0.00%) 1219.30 ( 3.12%)
> BHmean-50 8 1678.49 ( 0.00%) 1678.83 ( 0.02%)
> BHmean-50 16 2251.01 ( 0.00%) 2194.52 ( -2.51%)
> BHmean-50 32 2751.39 ( 0.00%) 2678.45 ( -2.65%)
> BHmean-50 64 3189.69 ( 0.00%) 3154.45 ( -1.10%)
> BHmean-50 128 3396.18 ( 0.00%) 3451.59 ( 1.63%)
> BHmean-50 1024 2836.80 ( 0.00%) 2836.84 ( 0.00%)
> BHmean-95 1 506.13 ( 0.00%) 493.24 ( -2.55%)
> BHmean-95 2 824.84 ( 0.00%) 824.30 ( -0.06%)
> BHmean-95 4 1175.91 ( 0.00%) 1208.57 ( 2.78%)
> BHmean-95 8 1666.46 ( 0.00%) 1668.22 ( 0.11%)
> BHmean-95 16 2219.59 ( 0.00%) 2163.86 ( -2.51%)
> BHmean-95 32 2731.26 ( 0.00%) 2640.34 ( -3.33%)
> BHmean-95 64 3144.73 ( 0.00%) 3108.59 ( -1.15%)
> BHmean-95 128 3306.51 ( 0.00%) 3363.33 ( 1.72%)
> BHmean-95 1024 2658.37 ( 0.00%) 2668.88 ( 0.40%)
> BHmean-99 1 505.37 ( 0.00%) 493.08 ( -2.43%)
> BHmean-99 2 824.31 ( 0.00%) 824.12 ( -0.02%)
> BHmean-99 4 1174.94 ( 0.00%) 1208.02 ( 2.81%)
> BHmean-99 8 1665.40 ( 0.00%) 1667.48 ( 0.12%)
> BHmean-99 16 2216.51 ( 0.00%) 2161.60 ( -2.48%)
> BHmean-99 32 2728.09 ( 0.00%) 2635.09 ( -3.41%)
> BHmean-99 64 3135.81 ( 0.00%) 3102.12 ( -1.07%)
> BHmean-99 128 3291.11 ( 0.00%) 3349.16 ( 1.76%)
> BHmean-99 1024 2645.54 ( 0.00%) 2655.67 ( 0.38%)
>
>
> dbench dbench
> default pan
> Duration User 822.55 827.85
> Duration System 8384.99 8164.83
> Duration Elapsed 1671.36 1670.74
>
> dbench dbench
> default pan
> Ops NUMA alloc hit 183324626.00 182350114.00
> Ops NUMA alloc miss 0.00 0.00
> Ops NUMA interleave hit 0.00 0.00
> Ops NUMA alloc local 183324508.00 182350004.00
> Ops NUMA base-page range updates 181531.00 515929.00
> Ops NUMA PTE updates 181531.00 515929.00
> Ops NUMA PMD updates 0.00 0.00
> Ops NUMA hint faults 162742.00 510979.00
> Ops NUMA hint local faults % 120309.00 426848.00
> Ops NUMA hint local percent 73.93 83.54
> Ops NUMA pages migrated 37605.00 59519.00
> Ops AutoNUMA cost 815.70 2559.64
>
More hinting faults and migrations
> Netperf-RR
> ----------
> netperf-udp-rr
> netperf netperf
> rr-default rr-pan
> Min 1 104915.69 ( 0.00%) 104505.71 ( -0.39%)
> Hmean 1 105865.46 ( 0.00%) 105899.22 * 0.03%*
> Stddev 1 528.45 ( 0.00%) 881.92 ( -66.89%)
> CoeffVar 1 0.50 ( 0.00%) 0.83 ( -66.83%)
> Max 1 106410.28 ( 0.00%) 107196.52 ( 0.74%)
> BHmean-50 1 106232.53 ( 0.00%) 106568.26 ( 0.32%)
> BHmean-95 1 105972.05 ( 0.00%) 106056.35 ( 0.08%)
> BHmean-99 1 105972.05 ( 0.00%) 106056.35 ( 0.08%)
>
> netperf netperf
> rr-default rr-pan
> Duration User 11.20 10.74
> Duration System 202.40 201.32
> Duration Elapsed 303.09 303.08
>
> netperf netperf
> rr-default rr-pan
> Ops NUMA alloc hit 183999.00 183853.00
> Ops NUMA alloc miss 0.00 0.00
> Ops NUMA interleave hit 0.00 0.00
> Ops NUMA alloc local 183999.00 183853.00
> Ops NUMA base-page range updates 0.00 24370.00
> Ops NUMA PTE updates 0.00 24370.00
> Ops NUMA PMD updates 0.00 0.00
> Ops NUMA hint faults 539.00 24470.00
> Ops NUMA hint local faults % 539.00 24447.00
> Ops NUMA hint local percent 100.00 99.91
> Ops NUMA pages migrated 0.00 23.00
> Ops AutoNUMA cost 2.69 122.52
>
Netperf these days usually runs on the same node so NUMA balancing
triggers very rarely.
> netperf-tcp-rr
> netperf netperf
> rr-default rr-pan
> Min 1 96156.03 ( 0.00%) 96556.87 ( 0.42%)
> Hmean 1 96627.24 ( 0.00%) 97551.38 * 0.96%*
> Stddev 1 284.71 ( 0.00%) 637.74 (-123.99%)
> CoeffVar 1 0.29 ( 0.00%) 0.65 (-121.87%)
> Max 1 96974.45 ( 0.00%) 98554.94 ( 1.63%)
> BHmean-50 1 96840.81 ( 0.00%) 98067.19 ( 1.27%)
> BHmean-95 1 96679.89 ( 0.00%) 97663.14 ( 1.02%)
> BHmean-99 1 96679.89 ( 0.00%) 97663.14 ( 1.02%)
>
> netperf netperf
> rr-default rr-pan
> Duration User 10.21 10.26
> Duration System 207.90 208.28
> Duration Elapsed 302.99 303.02
>
> netperf netperf
> rr-default rr-pan
> Ops NUMA alloc hit 183669.00 183695.00
> Ops NUMA alloc miss 0.00 0.00
> Ops NUMA interleave hit 0.00 0.00
> Ops NUMA alloc local 183657.00 183695.00
> Ops NUMA base-page range updates 3949.00 38561.00
> Ops NUMA PTE updates 3949.00 38561.00
> Ops NUMA PMD updates 0.00 0.00
> Ops NUMA hint faults 4186.00 43328.00
> Ops NUMA hint local faults % 4100.00 43195.00
> Ops NUMA hint local percent 97.95 99.69
> Ops NUMA pages migrated 9.00 73.00
> Ops AutoNUMA cost 20.96 216.91
>
Same.
> Autonumabench
> -------------
> autonumabench
> autonumabench autonumabench
> default pan
> Amean syst-NUMA01 11664.40 ( 0.00%) 11616.17 * 0.41%*
> Amean syst-NUMA01_THREADLOCAL 0.24 ( 0.00%) 0.22 * 7.78%*
> Amean syst-NUMA02 1.55 ( 0.00%) 9.31 *-499.26%*
> Amean syst-NUMA02_SMT 1.14 ( 0.00%) 4.04 *-254.39%*
> Amean elsp-NUMA01 223.52 ( 0.00%) 221.43 * 0.93%*
> Amean elsp-NUMA01_THREADLOCAL 0.95 ( 0.00%) 0.94 * 0.76%*
> Amean elsp-NUMA02 6.83 ( 0.00%) 5.74 * 15.90%*
> Amean elsp-NUMA02_SMT 6.65 ( 0.00%) 6.25 * 5.97%*
> BAmean-50 syst-NUMA01 11455.44 ( 0.00%) 10985.76 ( 4.10%)
> BAmean-50 syst-NUMA01_THREADLOCAL 0.22 ( 0.00%) 0.21 ( 7.46%)
> BAmean-50 syst-NUMA02 1.11 ( 0.00%) 8.91 (-703.00%)
> BAmean-50 syst-NUMA02_SMT 0.94 ( 0.00%) 3.42 (-262.19%)
> BAmean-50 elsp-NUMA01 217.38 ( 0.00%) 214.03 ( 1.54%)
> BAmean-50 elsp-NUMA01_THREADLOCAL 0.94 ( 0.00%) 0.94 ( 0.35%)
> BAmean-50 elsp-NUMA02 6.66 ( 0.00%) 5.45 ( 18.08%)
> BAmean-50 elsp-NUMA02_SMT 6.50 ( 0.00%) 6.09 ( 6.31%)
> BAmean-95 syst-NUMA01 11611.74 ( 0.00%) 11448.30 ( 1.41%)
> BAmean-95 syst-NUMA01_THREADLOCAL 0.23 ( 0.00%) 0.22 ( 7.14%)
> BAmean-95 syst-NUMA02 1.27 ( 0.00%) 9.21 (-624.93%)
> BAmean-95 syst-NUMA02_SMT 0.97 ( 0.00%) 3.90 (-300.34%)
> BAmean-95 elsp-NUMA01 221.75 ( 0.00%) 218.53 ( 1.45%)
> BAmean-95 elsp-NUMA01_THREADLOCAL 0.94 ( 0.00%) 0.94 ( 0.53%)
> BAmean-95 elsp-NUMA02 6.75 ( 0.00%) 5.68 ( 15.81%)
> BAmean-95 elsp-NUMA02_SMT 6.61 ( 0.00%) 6.23 ( 5.82%)
> BAmean-99 syst-NUMA01 11611.74 ( 0.00%) 11448.30 ( 1.41%)
> BAmean-99 syst-NUMA01_THREADLOCAL 0.23 ( 0.00%) 0.22 ( 7.14%)
> BAmean-99 syst-NUMA02 1.27 ( 0.00%) 9.21 (-624.93%)
> BAmean-99 syst-NUMA02_SMT 0.97 ( 0.00%) 3.90 (-300.34%)
> BAmean-99 elsp-NUMA01 221.75 ( 0.00%) 218.53 ( 1.45%)
> BAmean-99 elsp-NUMA01_THREADLOCAL 0.94 ( 0.00%) 0.94 ( 0.53%)
> BAmean-99 elsp-NUMA02 6.75 ( 0.00%) 5.68 ( 15.81%)
> BAmean-99 elsp-NUMA02_SMT 6.61 ( 0.00%) 6.23 ( 5.82%)
>
> autonumabenchautonumabench
> default pan
> Duration User 94363.43 94436.71
> Duration System 81671.72 81408.53
> Duration Elapsed 1676.81 1647.99
>
> autonumabench autonumabench
> default pan
> Ops NUMA alloc hit 539544115.00 539522029.00
> Ops NUMA alloc miss 0.00 0.00
> Ops NUMA interleave hit 0.00 0.00
> Ops NUMA alloc local 279025768.00 281735736.00
> Ops NUMA base-page range updates 69695169.00 84767502.00
> Ops NUMA PTE updates 69695169.00 84767502.00
> Ops NUMA PMD updates 0.00 0.00
> Ops NUMA hint faults 69691818.00 87895044.00
> Ops NUMA hint local faults % 56565519.00 65819747.00
> Ops NUMA hint local percent 81.17 74.88
> Ops NUMA pages migrated 5950362.00 8310169.00
> Ops AutoNUMA cost 349060.01 440226.49
>
More hinting faults and migrations. Not clear which sub-test exactly but
most likely NUMA02.
--
Mel Gorman
SUSE Labs
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