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Message-ID: <4c4c002302dbbb736f9301a7eb43916ab7fbb288.camel@suse.com>
Date: Tue, 29 Oct 2019 10:19:36 +0100
From: Dario Faggioli <dfaggioli@...e.com>
To: Aaron Lu <aaron.lu@...ux.alibaba.com>,
Aubrey Li <aubrey.intel@...il.com>
Cc: Tim Chen <tim.c.chen@...ux.intel.com>,
Julien Desfossez <jdesfossez@...italocean.com>,
"Li, Aubrey" <aubrey.li@...ux.intel.com>,
Subhra Mazumdar <subhra.mazumdar@...cle.com>,
Vineeth Remanan Pillai <vpillai@...italocean.com>,
Nishanth Aravamudan <naravamudan@...italocean.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Paul Turner <pjt@...gle.com>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
Frédéric Weisbecker <fweisbec@...il.com>,
Kees Cook <keescook@...omium.org>,
Greg Kerr <kerrnel@...gle.com>, Phil Auld <pauld@...hat.com>,
Valentin Schneider <valentin.schneider@....com>,
Mel Gorman <mgorman@...hsingularity.net>,
Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [RFC PATCH v3 00/16] Core scheduling v3
On Tue, 2019-10-29 at 10:11 +0100, Dario Faggioli wrote:
> On Sun, 2019-09-15 at 22:14 +0800, Aaron Lu wrote:
> > I'm using the following branch as base which is v5.1.5 based:
> > https://github.com/digitalocean/linux-coresched coresched-v3-
> > v5.1.5-
> > test
> >
> > And I have pushed Tim's branch to:
> > https://github.com/aaronlu/linux coresched-v3-v5.1.5-test-tim
> >
> > Mine:
> > https://github.com/aaronlu/linux coresched-v3-v5.1.5-test-
> > core_vruntime
> >
> Hello,
>
> As anticipated, I've been trying to follow the development of this
> feature and, in the meantime, I have done some benchmarks.
>
> I actually have a lot of data (and am planning for more), so I am
> sending a few emails, each one with a subset of the numbers in it,
> instead than just one which would be beyond giant! :-)
>
MEMCACHED/MUTILATE
==================
http://xenbits.xen.org/people/dariof/benchmarks/results/linux/core-sched/mmtests/boxes/wayrath/coresched-email-7_mutilate.txt
v v BM BM BM BM BM BM
BM-HT BM-noHT HT noHT csc-HT csc_stallfix-HT csc_tim-HT csc_vruntime-HT
Hmean 1 60672.24 ( 0.00%) 60476.27 ( -0.32%) 61303.65 ( 1.04%) 61353.05 ( 1.12%) 57026.54 * -6.01%* 56874.19 * -6.26%* 56781.04 * -6.41%* 56642.48 * -6.64%*
Hmean 3 149695.40 ( 0.00%) 131084.79 * -12.43%* 150802.12 ( 0.74%) 131058.25 * -12.45%* 138260.22 * -7.64%* 138002.31 * -7.81%* 136907.04 * -8.54%* 138317.36 * -7.60%*
Hmean 5 198656.98 ( 0.00%) 181719.88 * -8.53%* 196429.59 ( -1.12%) 186468.57 * -6.14%* 171612.43 * -13.61%* 176464.24 * -11.17%* 162578.64 * -18.16%* 170196.51 * -14.33%*
Hmean 7 180858.07 ( 0.00%) 187088.17 * 3.44%* 181549.92 ( 0.38%) 189813.97 * 4.95%* 166898.82 * -7.72%* 164724.43 * -8.92%* 143102.58 * -20.88%* 128900.19 * -28.73%*
Hmean 8 157176.91 ( 0.00%) 190533.25 * 21.22%* 159795.04 ( 1.67%) 188249.31 * 19.77%* 168399.58 * 7.14%* 169700.06 * 7.97%* 137152.66 * -12.74%* 123355.03 * -21.52%*
Stddev 1 551.36 ( 0.00%) 52.18 ( 90.54%) 306.31 ( 44.44%) 385.01 ( 30.17%) 353.37 ( 35.91%) 350.76 ( 36.38%) 476.56 ( 13.57%) 279.80 ( 49.25%)
Stddev 3 1206.26 ( 0.00%) 2368.98 ( -96.39%) 652.07 ( 45.94%) 1300.67 ( -7.83%) 1849.15 ( -53.30%) 2434.55 (-101.83%) 1063.43 ( 11.84%) 1825.98 ( -51.38%)
Stddev 5 3843.30 ( 0.00%) 122.92 ( 96.80%) 2883.77 ( 24.97%) 481.11 ( 87.48%) 4099.56 ( -6.67%) 4424.91 ( -15.13%) 596.25 ( 84.49%) 1345.78 ( 64.98%)
Stddev 7 2990.97 ( 0.00%) 1645.75 ( 44.98%) 6567.23 (-119.57%) 5422.57 ( -81.30%) 3191.68 ( -6.71%) 2438.38 ( 18.48%) 1211.94 ( 59.48%) 705.34 ( 76.42%)
Stddev 8 3637.12 ( 0.00%) 1490.36 ( 59.02%) 3386.42 ( 6.89%) 2437.43 ( 32.98%) 1056.02 ( 70.97%) 1391.07 ( 61.75%) 1488.57 ( 59.07%) 774.85 ( 78.70%)
v v VM VM VM VM VM VM
VM-HT VM-noHT HT noHT csc-HT csc_stallfix-HT csc_tim-HT csc_vruntime-HT
Hmean 1 42580.67 ( 0.00%) 53440.15 * 25.50%* 54293.03 * 27.51%* 52771.89 * 23.93%* 53689.85 * 26.09%* 53804.35 * 26.36%* 53730.74 * 26.19%* 53902.75 * 26.59%*
Hmean 3 115732.63 ( 0.00%) 70651.66 * -38.95%* 125537.18 * 8.47%* 70738.43 * -38.88%* 126041.27 * 8.91%* 126387.30 * 9.21%* 127285.87 * 9.98%* 126816.33 * 9.58%*
Hmean 5 176633.72 ( 0.00%) 22349.68 * -87.35%* 182113.02 * 3.10%* 19850.93 * -88.76%* 137910.40 * -21.92%* 180934.44 * 2.43%* 175009.60 ( -0.92%) 174758.21 ( -1.06%)
Hmean 7 182512.86 ( 0.00%) 48728.14 * -73.30%* 186272.46 * 2.06%* 49015.69 * -73.14%* 157398.75 * -13.76%* 184989.00 ( 1.36%) 172307.74 * -5.59%* 173203.24 * -5.10%*
Hmean 8 192244.37 ( 0.00%) 65283.21 * -66.04%* 195435.08 ( 1.66%) 63616.87 * -66.91%* 176288.98 * -8.30%* 192413.50 ( 0.09%) 188699.07 ( -1.84%) 185870.91 * -3.32%*
Stddev 1 337.79 ( 0.00%) 523.30 ( -54.92%) 22.90 ( 93.22%) 353.55 ( -4.67%) 196.63 ( 41.79%) 470.55 ( -39.30%) 414.86 ( -22.82%) 190.50 ( 43.60%)
Stddev 3 1945.52 ( 0.00%) 420.36 ( 78.39%) 1365.07 ( 29.84%) 954.82 ( 50.92%) 1136.12 ( 41.60%) 1674.98 ( 13.91%) 1539.07 ( 20.89%) 1129.09 ( 41.96%)
Stddev 5 964.02 ( 0.00%) 2121.27 (-120.05%) 3232.44 (-235.31%) 2284.37 (-136.96%) 8374.66 (-768.73%) 3156.06 (-227.39%) 948.17 ( 1.64%) 2700.91 (-180.17%)
Stddev 7 1028.64 ( 0.00%) 1740.95 ( -69.25%) 2860.04 (-178.04%) 3366.68 (-227.29%) 3360.79 (-226.72%) 4762.47 (-362.99%) 2968.56 (-188.59%) 1429.88 ( -39.01%)
Stddev 8 3794.15 ( 0.00%) 1893.82 ( 50.09%) 565.06 ( 85.11%) 893.04 ( 76.46%) 3201.43 ( 15.62%) 1931.66 ( 49.09%) 360.93 ( 90.49%) 1945.37 ( 48.73%)
v v VM VM VM VM VM VM
VM-v4-HT VM-v4-noHT v4-HT v4-noHT v4-csc-HT v4-csc_stallfix-HT v4-csc_tim-HT v4-csc_vruntime-HT
Hmean 1 44216.52 ( 0.00%) 53968.94 * 22.06%* 54078.28 * 22.30%* 54290.57 * 22.78%* 53552.08 * 21.11%* 51342.78 * 16.12%* 53967.09 * 22.05%* 53790.48 * 21.65%*
Hmean 3 105120.19 ( 0.00%) 120769.59 * 14.89%* 121460.04 * 15.54%* 117410.09 * 11.69%* 120296.87 * 14.44%* 109089.25 ( 3.78%) 123133.70 * 17.14%* 123614.82 * 17.59%*
Hmean 4 144618.05 ( 0.00%) 167039.86 * 15.50%* 178922.55 * 23.72%* 175641.36 * 21.45%* 185338.19 * 28.16%* 148152.02 ( 2.44%) 179709.39 * 24.26%* 179754.74 * 24.30%*
Stddev 1 144.30 ( 0.00%) 101.12 ( 29.93%) 420.02 (-191.08%) 294.43 (-104.04%) 300.29 (-108.10%) 330.58 (-129.10%) 353.69 (-145.11%) 142.58 ( 1.19%)
Stddev 3 3300.71 ( 0.00%) 905.78 ( 72.56%) 2537.34 ( 23.13%) 3289.78 ( 0.33%) 1113.35 ( 66.27%) 2685.20 ( 18.65%) 8425.99 (-155.28%) 2280.72 ( 30.90%)
Stddev 4 1828.49 ( 0.00%) 9851.42 (-438.77%) 2779.22 ( -52.00%) 3312.07 ( -81.14%) 7392.50 (-304.30%) 6090.54 (-233.09%) 3320.77 ( -81.61%) 4836.89 (-164.53%)
v v VMx2 VMx2 VMx2 VMx2 VMx2 VMx2
VMx2-HT VMx2-noHT HT noHT csc-HT csc_stallfix-HT csc_tim-HT csc_vruntime-HT
Hmean 1 53045.85 ( 0.00%) 35310.51 * -33.43%* 38949.82 * -26.57%* 35500.55 * -33.08%* 49350.06 * -6.97%* 35372.44 * -33.32%* 40556.30 * -23.54%* 42238.57 * -20.37%*
Hmean 3 124865.12 ( 0.00%) 7997.67 * -93.59%* 57204.70 * -54.19%* 8373.67 * -93.29%* 56781.47 * -54.53%* 38892.18 * -68.85%* 51207.79 * -58.99%* 46151.33 * -63.04%*
Hmean 5 178848.31 ( 0.00%) 4984.40 * -97.21%* 31431.45 * -82.43%* 5101.29 * -97.15%* 41204.02 * -76.96%* 24592.26 * -86.25%* 33541.47 * -81.25%* 28762.54 * -83.92%*
Hmean 7 187708.49 ( 0.00%) 12945.53 * -93.10%* 57937.51 * -69.13%* 12898.91 * -93.13%* 89180.74 * -52.49%* 48390.34 * -74.22%* 54198.33 * -71.13%* 50261.68 * -73.22%*
Hmean 8 199929.38 ( 0.00%) 27516.10 * -86.24%* 77578.88 * -61.20%* 27608.20 * -86.19%* 117871.45 * -41.04%* 65719.85 * -67.13%* 76669.78 * -61.65%* 67983.03 * -66.00%*
Stddev 1 404.57 ( 0.00%) 708.20 ( -75.05%) 102.16 ( 74.75%) 258.18 ( 36.19%) 132.11 ( 67.35%) 1145.71 (-183.19%) 740.95 ( -83.14%) 91.67 ( 77.34%)
Stddev 3 1867.11 ( 0.00%) 729.15 ( 60.95%) 2529.52 ( -35.48%) 1212.31 ( 35.07%) 1765.46 ( 5.44%) 2698.45 ( -44.53%) 376.23 ( 79.85%) 2108.90 ( -12.95%)
Stddev 5 1556.91 ( 0.00%) 193.16 ( 87.59%) 3307.78 (-112.46%) 207.87 ( 86.65%) 1401.20 ( 10.00%) 1945.52 ( -24.96%) 1821.44 ( -16.99%) 2166.87 ( -39.18%)
Stddev 7 3622.13 ( 0.00%) 1690.01 ( 53.34%) 5268.81 ( -45.46%) 690.12 ( 80.95%) 8337.77 (-130.19%) 3737.07 ( -3.17%) 1900.15 ( 47.54%) 3388.45 ( 6.45%)
Stddev 8 1913.74 ( 0.00%) 1460.07 ( 23.71%) 2068.35 ( -8.08%) 1750.51 ( 8.53%) 4229.08 (-120.99%) 3477.66 ( -81.72%) 3318.68 ( -73.41%) 1338.76 ( 30.04%)
Mutilate brings us back where core scheduling does bad on baremetal,
but fine in VMs. The benchmark seems to be much more sensitive to
HyperThreading when run inside virtual machines, and core scheduling
guarantees better results than disabling hyperthreading, in such cases.
Interestingly, this time the thing is more evedint in the *non*
overcommitted scenario.
In fact, with one 8 vCPUs VM, v-VM-noHT is -87.35% and VM-csc_vruntime-
HT is only -1.06%, which is really good. In the overcommitted case, v-
VMx2-noHT reaches -97.21% while VMx2-csc_vruntime-HT is -83.92%. So,
yeah, better, but not "as better" as before.
--
Dario Faggioli, Ph.D
http://about.me/dario.faggioli
Virtualization Software Engineer
SUSE Labs, SUSE https://www.suse.com/
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