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Message-ID: <dfcfae9c-caae-1d94-3f7d-de3d644de9e0@amd.com>
Date: Mon, 18 Jul 2022 16:30:15 +0530
From: K Prateek Nayak <kprateek.nayak@....com>
To: Abel Wu <wuyun.abel@...edance.com>,
Peter Zijlstra <peterz@...radead.org>,
Mel Gorman <mgorman@...e.de>,
Vincent Guittot <vincent.guittot@...aro.org>
Cc: Josh Don <joshdon@...gle.com>, Chen Yu <yu.c.chen@...el.com>,
Tim Chen <tim.c.chen@...ux.intel.com>,
"Gautham R . Shenoy" <gautham.shenoy@....com>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/7] sched/fair: improve scan efficiency of SIS
Hello Abel,
We've tested the patch on a dual socket Zen3 System (2 x 64C/128T).
tl;dr
- There is a noticeable regression for Hackbench with the system
configured in NPS4 mode. This regression is more noticeable
with SIS_UTIL enabled and not as severe with SIS_PROP.
This regression is surprising given the patch should have
improved SIS Efficiency in case of fully loaded system and is
consistently reproducible across multiple runs and reboots.
- Apart from the above anomaly, the results look positive overall
with the patched kernel behaving as well as, or better than the tip.
I'll leave the full test results below.
On 6/19/2022 5:34 PM, Abel Wu wrote:
>
> [..snip..]
>
> Benchmark
> =========
>
> Tests are done in an Intel Xeon(R) Platinum 8260 CPU@...0GHz machine
> with 2 NUMA nodes each of which has 24 cores with SMT2 enabled, so 96
> CPUs in total.
>
> All of the benchmarks are done inside a normal cpu cgroup in a clean
> environment with cpu turbo disabled.
>
> Based on tip sched/core f3dd3f674555 (v5.19-rc2).
>
> Results
> =======
>
> hackbench-process-pipes
> vanilla filter
> Amean 1 0.2357 ( 0.00%) 0.2540 ( -7.78%)
> Amean 4 0.6403 ( 0.00%) 0.6363 ( 0.62%)
> Amean 7 0.7583 ( 0.00%) 0.7367 ( 2.86%)
> Amean 12 1.0703 ( 0.00%) 1.0520 ( 1.71%)
> Amean 21 2.0363 ( 0.00%) 1.9610 * 3.70%*
> Amean 30 3.2487 ( 0.00%) 2.9083 * 10.48%*
> Amean 48 6.3620 ( 0.00%) 4.8543 * 23.70%*
> Amean 79 8.3653 ( 0.00%) 7.1077 * 15.03%*
> Amean 110 9.8370 ( 0.00%) 8.5740 * 12.84%*
> Amean 141 11.4667 ( 0.00%) 10.8750 * 5.16%*
> Amean 172 13.4433 ( 0.00%) 12.6443 * 5.94%*
> Amean 203 15.8970 ( 0.00%) 14.9143 * 6.18%*
> Amean 234 17.9643 ( 0.00%) 16.9123 * 5.86%*
> Amean 265 20.3910 ( 0.00%) 19.2040 * 5.82%*
> Amean 296 22.5253 ( 0.00%) 21.2547 * 5.64%*
>
> hackbench-process-sockets
> vanilla filter
> Amean 1 0.4177 ( 0.00%) 0.4133 ( 1.04%)
> Amean 4 1.4397 ( 0.00%) 1.4240 * 1.09%*
> Amean 7 2.4720 ( 0.00%) 2.4310 * 1.66%*
> Amean 12 4.1407 ( 0.00%) 4.0683 * 1.75%*
> Amean 21 7.0550 ( 0.00%) 6.8830 * 2.44%*
> Amean 30 9.9633 ( 0.00%) 9.7750 * 1.89%*
> Amean 48 15.9837 ( 0.00%) 15.5313 * 2.83%*
> Amean 79 26.7740 ( 0.00%) 26.2703 * 1.88%*
> Amean 110 37.2913 ( 0.00%) 36.5433 * 2.01%*
> Amean 141 47.8937 ( 0.00%) 46.5300 * 2.85%*
> Amean 172 58.0273 ( 0.00%) 56.4530 * 2.71%*
> Amean 203 68.2530 ( 0.00%) 66.3320 * 2.81%*
> Amean 234 78.8987 ( 0.00%) 76.8497 * 2.60%*
> Amean 265 89.1520 ( 0.00%) 86.8213 * 2.61%*
> Amean 296 99.6920 ( 0.00%) 96.9707 * 2.73%*
>
> hackbench-thread-pipes
> vanilla filter
> Amean 1 0.2647 ( 0.00%) 0.2633 ( 0.50%)
> Amean 4 0.6290 ( 0.00%) 0.6607 ( -5.03%)
> Amean 7 0.7850 ( 0.00%) 0.7870 ( -0.25%)
> Amean 12 1.3347 ( 0.00%) 1.2577 ( 5.77%)
> Amean 21 3.1233 ( 0.00%) 2.4613 * 21.20%*
> Amean 30 5.7120 ( 0.00%) 3.6847 * 35.49%*
> Amean 48 8.1947 ( 0.00%) 6.2670 * 23.52%*
> Amean 79 9.1750 ( 0.00%) 8.0640 * 12.11%*
> Amean 110 10.6300 ( 0.00%) 9.5583 * 10.08%*
> Amean 141 12.7490 ( 0.00%) 12.0167 * 5.74%*
> Amean 172 15.1567 ( 0.00%) 14.1570 * 6.60%*
> Amean 203 17.5160 ( 0.00%) 16.7883 ( 4.15%)
> Amean 234 19.8710 ( 0.00%) 19.5370 ( 1.68%)
> Amean 265 23.2700 ( 0.00%) 21.4017 * 8.03%*
> Amean 296 25.4093 ( 0.00%) 23.9943 * 5.57%*
>
> hackbench-thread-sockets
> vanilla filter
> Amean 1 0.4467 ( 0.00%) 0.4347 ( 2.69%)
> Amean 4 1.4757 ( 0.00%) 1.4533 * 1.51%*
> Amean 7 2.5320 ( 0.00%) 2.4993 * 1.29%*
> Amean 12 4.2617 ( 0.00%) 4.1780 * 1.96%*
> Amean 21 7.2397 ( 0.00%) 7.0660 * 2.40%*
> Amean 30 10.2200 ( 0.00%) 9.9810 * 2.34%*
> Amean 48 16.2623 ( 0.00%) 16.0483 * 1.32%*
> Amean 79 27.4307 ( 0.00%) 26.8410 * 2.15%*
> Amean 110 37.8993 ( 0.00%) 37.3223 * 1.52%*
> Amean 141 48.3890 ( 0.00%) 47.4823 * 1.87%*
> Amean 172 58.9887 ( 0.00%) 57.7753 * 2.06%*
> Amean 203 69.5853 ( 0.00%) 68.0563 * 2.20%*
> Amean 234 80.0743 ( 0.00%) 78.4857 * 1.98%*
> Amean 265 90.5473 ( 0.00%) 89.3363 * 1.34%*
> Amean 296 101.3857 ( 0.00%) 99.7717 * 1.59%*
>
> schbench
> vanilla filter
> Lat 50.0th-qrtle-1 6.00 ( 0.00%) 6.00 ( 0.00%)
> Lat 75.0th-qrtle-1 8.00 ( 0.00%) 8.00 ( 0.00%)
> Lat 90.0th-qrtle-1 9.00 ( 0.00%) 8.00 ( 11.11%)
> Lat 95.0th-qrtle-1 9.00 ( 0.00%) 8.00 ( 11.11%)
> Lat 99.0th-qrtle-1 10.00 ( 0.00%) 9.00 ( 10.00%)
> Lat 99.5th-qrtle-1 11.00 ( 0.00%) 9.00 ( 18.18%)
> Lat 99.9th-qrtle-1 11.00 ( 0.00%) 9.00 ( 18.18%)
> Lat 50.0th-qrtle-2 6.00 ( 0.00%) 7.00 ( -16.67%)
> Lat 75.0th-qrtle-2 7.00 ( 0.00%) 8.00 ( -14.29%)
> Lat 90.0th-qrtle-2 8.00 ( 0.00%) 9.00 ( -12.50%)
> Lat 95.0th-qrtle-2 8.00 ( 0.00%) 10.00 ( -25.00%)
> Lat 99.0th-qrtle-2 9.00 ( 0.00%) 11.00 ( -22.22%)
> Lat 99.5th-qrtle-2 9.00 ( 0.00%) 11.00 ( -22.22%)
> Lat 99.9th-qrtle-2 9.00 ( 0.00%) 11.00 ( -22.22%)
> Lat 50.0th-qrtle-4 9.00 ( 0.00%) 8.00 ( 11.11%)
> Lat 75.0th-qrtle-4 10.00 ( 0.00%) 10.00 ( 0.00%)
> Lat 90.0th-qrtle-4 11.00 ( 0.00%) 11.00 ( 0.00%)
> Lat 95.0th-qrtle-4 12.00 ( 0.00%) 11.00 ( 8.33%)
> Lat 99.0th-qrtle-4 13.00 ( 0.00%) 13.00 ( 0.00%)
> Lat 99.5th-qrtle-4 13.00 ( 0.00%) 16.00 ( -23.08%)
> Lat 99.9th-qrtle-4 13.00 ( 0.00%) 19.00 ( -46.15%)
> Lat 50.0th-qrtle-8 11.00 ( 0.00%) 11.00 ( 0.00%)
> Lat 75.0th-qrtle-8 14.00 ( 0.00%) 14.00 ( 0.00%)
> Lat 90.0th-qrtle-8 16.00 ( 0.00%) 16.00 ( 0.00%)
> Lat 95.0th-qrtle-8 17.00 ( 0.00%) 17.00 ( 0.00%)
> Lat 99.0th-qrtle-8 22.00 ( 0.00%) 19.00 ( 13.64%)
> Lat 99.5th-qrtle-8 28.00 ( 0.00%) 23.00 ( 17.86%)
> Lat 99.9th-qrtle-8 31.00 ( 0.00%) 42.00 ( -35.48%)
> Lat 50.0th-qrtle-16 17.00 ( 0.00%) 17.00 ( 0.00%)
> Lat 75.0th-qrtle-16 23.00 ( 0.00%) 23.00 ( 0.00%)
> Lat 90.0th-qrtle-16 26.00 ( 0.00%) 27.00 ( -3.85%)
> Lat 95.0th-qrtle-16 28.00 ( 0.00%) 29.00 ( -3.57%)
> Lat 99.0th-qrtle-16 32.00 ( 0.00%) 33.00 ( -3.12%)
> Lat 99.5th-qrtle-16 37.00 ( 0.00%) 35.00 ( 5.41%)
> Lat 99.9th-qrtle-16 54.00 ( 0.00%) 46.00 ( 14.81%)
> Lat 50.0th-qrtle-32 30.00 ( 0.00%) 29.00 ( 3.33%)
> Lat 75.0th-qrtle-32 43.00 ( 0.00%) 42.00 ( 2.33%)
> Lat 90.0th-qrtle-32 51.00 ( 0.00%) 49.00 ( 3.92%)
> Lat 95.0th-qrtle-32 54.00 ( 0.00%) 51.00 ( 5.56%)
> Lat 99.0th-qrtle-32 61.00 ( 0.00%) 57.00 ( 6.56%)
> Lat 99.5th-qrtle-32 64.00 ( 0.00%) 60.00 ( 6.25%)
> Lat 99.9th-qrtle-32 72.00 ( 0.00%) 82.00 ( -13.89%)
> Lat 50.0th-qrtle-47 44.00 ( 0.00%) 45.00 ( -2.27%)
> Lat 75.0th-qrtle-47 64.00 ( 0.00%) 65.00 ( -1.56%)
> Lat 90.0th-qrtle-47 75.00 ( 0.00%) 77.00 ( -2.67%)
> Lat 95.0th-qrtle-47 81.00 ( 0.00%) 82.00 ( -1.23%)
> Lat 99.0th-qrtle-47 92.00 ( 0.00%) 98.00 ( -6.52%)
> Lat 99.5th-qrtle-47 101.00 ( 0.00%) 114.00 ( -12.87%)
> Lat 99.9th-qrtle-47 271.00 ( 0.00%) 167.00 ( 38.38%)
>
> netperf-udp
> vanilla filter
> Hmean send-64 199.12 ( 0.00%) 201.32 ( 1.11%)
> Hmean send-128 396.22 ( 0.00%) 397.01 ( 0.20%)
> Hmean send-256 777.80 ( 0.00%) 783.96 ( 0.79%)
> Hmean send-1024 2972.62 ( 0.00%) 3011.87 * 1.32%*
> Hmean send-2048 5600.64 ( 0.00%) 5730.50 * 2.32%*
> Hmean send-3312 8757.45 ( 0.00%) 8703.62 ( -0.61%)
> Hmean send-4096 10578.90 ( 0.00%) 10590.93 ( 0.11%)
> Hmean send-8192 17051.22 ( 0.00%) 17189.62 * 0.81%*
> Hmean send-16384 27915.16 ( 0.00%) 27816.01 ( -0.36%)
> Hmean recv-64 199.12 ( 0.00%) 201.32 ( 1.11%)
> Hmean recv-128 396.22 ( 0.00%) 397.01 ( 0.20%)
> Hmean recv-256 777.80 ( 0.00%) 783.96 ( 0.79%)
> Hmean recv-1024 2972.62 ( 0.00%) 3011.87 * 1.32%*
> Hmean recv-2048 5600.64 ( 0.00%) 5730.49 * 2.32%*
> Hmean recv-3312 8757.45 ( 0.00%) 8703.61 ( -0.61%)
> Hmean recv-4096 10578.90 ( 0.00%) 10590.93 ( 0.11%)
> Hmean recv-8192 17051.21 ( 0.00%) 17189.57 * 0.81%*
> Hmean recv-16384 27915.08 ( 0.00%) 27815.86 ( -0.36%)
>
> netperf-tcp
> vanilla filter
> Hmean 64 811.07 ( 0.00%) 835.46 * 3.01%*
> Hmean 128 1614.86 ( 0.00%) 1652.27 * 2.32%*
> Hmean 256 3131.16 ( 0.00%) 3119.01 ( -0.39%)
> Hmean 1024 10286.12 ( 0.00%) 10333.64 ( 0.46%)
> Hmean 2048 16231.88 ( 0.00%) 17141.88 * 5.61%*
> Hmean 3312 20705.91 ( 0.00%) 21703.49 * 4.82%*
> Hmean 4096 22650.75 ( 0.00%) 23904.09 * 5.53%*
> Hmean 8192 27984.06 ( 0.00%) 29170.57 * 4.24%*
> Hmean 16384 32816.85 ( 0.00%) 33351.41 * 1.63%*
>
> tbench4 Throughput
> vanilla filter
> Hmean 1 300.07 ( 0.00%) 302.52 * 0.82%*
> Hmean 2 617.72 ( 0.00%) 598.45 * -3.12%*
> Hmean 4 1213.99 ( 0.00%) 1206.36 * -0.63%*
> Hmean 8 2373.78 ( 0.00%) 2372.28 * -0.06%*
> Hmean 16 4777.82 ( 0.00%) 4711.44 * -1.39%*
> Hmean 32 7182.50 ( 0.00%) 7718.15 * 7.46%*
> Hmean 64 8611.44 ( 0.00%) 9409.29 * 9.27%*
> Hmean 128 18102.63 ( 0.00%) 20650.23 * 14.07%*
> Hmean 256 18029.28 ( 0.00%) 20611.03 * 14.32%*
> Hmean 384 17986.44 ( 0.00%) 19361.29 * 7.64%
Following are the results from dual socket Zen3 platform (2 x 64C/128T) running with
various NPS configuration:
Following is the NUMA configuration for each NPS mode on the system:
NPS1: Each socket is a NUMA node.
Total 2 NUMA nodes in the dual socket machine.
Node 0: 0-63, 128-191
Node 1: 64-127, 192-255
NPS2: Each socket is further logically divided into 2 NUMA regions.
Total 4 NUMA nodes exist over 2 socket.
Node 0: 0-31, 128-159
Node 1: 32-63, 160-191
Node 2: 64-95, 192-223
Node 3: 96-127, 223-255
NPS4: Each socket is logically divided into 4 NUMA regions.
Total 8 NUMA nodes exist over 2 socket.
Node 0: 0-15, 128-143
Node 1: 16-31, 144-159
Node 2: 32-47, 160-175
Node 3: 48-63, 176-191
Node 4: 64-79, 192-207
Node 5: 80-95, 208-223
Node 6: 96-111, 223-231
Node 7: 112-127, 232-255
Kernel versions:
- tip: 5.19-rc2 tip sched/core
- SIS_Eff: 5.19-rc2 tip sched/core + this patch series
When we started testing, the tip was at:
commit: c02d5546ea34 "sched/core: Use try_cmpxchg in set_nr_{and_not,if}_polling"
Note: All the testing was done with SIS_UTIL as the default SIS logic.
~~~~~~~~~
Hackbench
~~~~~~~~~
NPS1
Test: tip SIS_Eff
1-groups: 4.85 (0.00 pct) 4.83 (0.41 pct)
2-groups: 5.06 (0.00 pct) 5.24 (-3.55 pct)
4-groups: 5.25 (0.00 pct) 5.29 (-0.76 pct)
8-groups: 5.64 (0.00 pct) 5.57 (1.24 pct)
16-groups: 7.46 (0.00 pct) 7.40 (0.80 pct)
NPS2
Test: tip SIS_Eff
1-groups: 4.73 (0.00 pct) 4.70 (0.63 pct)
2-groups: 4.94 (0.00 pct) 4.95 (-0.20 pct)
4-groups: 5.14 (0.00 pct) 5.10 (0.77 pct)
8-groups: 5.59 (0.00 pct) 5.48 (1.96 pct)
16-groups: 7.42 (0.00 pct) 7.52 (-1.34 pct)
NPS4
Test: tip SIS_Eff
1-groups: 4.75 (0.00 pct) 4.76 (-0.21 pct)
2-groups: 5.10 (0.00 pct) 5.01 (1.76 pct)
4-groups: 5.87 (0.00 pct) 5.54 (5.62 pct)
8-groups: 5.97 (0.00 pct) 6.30 (-5.52 pct) *
8-groups: 5.80 (0.00 pct) 5.95 (-2.58 pct) [Verification Run]
16-groups: 8.33 (0.00 pct) 13.45 (-61.46 pct) * (System Overloaded ~ 2.5 task per CPU)
16-groups: 8.25 (0.00 pct) 14.26 (-72.84 pct) [Verification Run]
16-groups: 8.25 (0.00 pct) 13.44 (-62.90 pct) [Verification Run]
~~~~~~~~
schbench
~~~~~~~~
NPS1
#workers: tip SIS_Eff
1: 24.50 (0.00 pct) 19.00 (22.44 pct)
2: 28.00 (0.00 pct) 37.50 (-33.92 pct) *
2: 21.50 (0.00 pct) 23.00 (-6.97 pct) [Verification Run]
4: 35.50 (0.00 pct) 31.00 (12.67 pct)
8: 44.50 (0.00 pct) 43.50 (2.24 pct)
16: 69.50 (0.00 pct) 67.00 (3.59 pct)
32: 103.00 (0.00 pct) 102.50 (0.48 pct)
64: 183.50 (0.00 pct) 183.00 (0.27 pct)
128: 388.50 (0.00 pct) 380.50 (2.05 pct)
256: 868.00 (0.00 pct) 868.00 (0.00 pct)
512: 57856.00 (0.00 pct) 60224.00 (-4.09 pct)
NPS2
#workers: tip SIS_Eff
1: 18.50 (0.00 pct) 18.50 (0.00 pct)
2: 33.00 (0.00 pct) 27.50 (16.66 pct)
4: 37.00 (0.00 pct) 35.50 (4.05 pct)
8: 54.00 (0.00 pct) 52.50 (2.77 pct)
16: 70.50 (0.00 pct) 74.00 (-4.96 pct) *
16: 79.00 (0.00 pct) 71.00 (10.12 pct) [Verification Run]
32: 103.50 (0.00 pct) 105.00 (-1.44 pct)
64: 183.50 (0.00 pct) 192.00 (-4.63 pct) *
64: 179.50 (0.00 pct) 179.50 (0.00 pct) [Verification Run]
128: 378.50 (0.00 pct) 380.00 (-0.39 pct)
256: 902.00 (0.00 pct) 907.00 (-0.55 pct)
512: 58304.00 (0.00 pct) 60160.00 (-3.18 pct)
NPS4
#workers: tip SIS_Eff
1: 20.50 (0.00 pct) 18.50 (9.75 pct)
2: 35.00 (0.00 pct) 35.50 (-1.42 pct)
4: 36.00 (0.00 pct) 36.00 (0.00 pct)
8: 47.00 (0.00 pct) 52.00 (-10.63 pct) *
8: 54.00 (0.00 pct) 51.00 (5.55 pct) [Verification Run]
16: 83.50 (0.00 pct) 85.00 (-1.79 pct)
32: 102.50 (0.00 pct) 102.50 (0.00 pct)
64: 178.50 (0.00 pct) 181.00 (-1.40 pct)
128: 366.50 (0.00 pct) 380.00 (-3.68 pct)
256: 921.00 (0.00 pct) 920.00 (0.10 pct)
512: 60032.00 (0.00 pct) 60096.00 (-0.10 pct)
Note: schbench shows run to run variance which is linked to
new idle balance.
~~~~~~
tbench
~~~~~~
NPS1
Clients: tip SIS_Eff
1 446.42 (0.00 pct) 446.15 (-0.06 pct)
2 869.92 (0.00 pct) 876.12 (0.71 pct)
4 1637.44 (0.00 pct) 1641.65 (0.25 pct)
8 3210.27 (0.00 pct) 3213.43 (0.09 pct)
16 6196.44 (0.00 pct) 5972.09 (-3.62 pct)
32 11844.65 (0.00 pct) 10903.18 (-7.94 pct) *
32 11761.81 (0.00 pct) 12072.37 (2.64 pct) [Verification Run]
64 21678.40 (0.00 pct) 21747.25 (0.31 pct)
128 31311.82 (0.00 pct) 31499.24 (0.59 pct)
256 50250.62 (0.00 pct) 50930.33 (1.35 pct)
512 51377.40 (0.00 pct) 51377.19 (0.00 pct)
1024 53628.03 (0.00 pct) 53876.23 (0.46 pct)
NPS2
Clients: tip SIS_Eff
1 445.03 (0.00 pct) 447.66 (0.59 pct)
2 865.65 (0.00 pct) 872.88 (0.83 pct)
4 1619.09 (0.00 pct) 1645.17 (1.61 pct)
8 3117.29 (0.00 pct) 3168.90 (1.65 pct)
16 5950.42 (0.00 pct) 5657.02 (-4.93 pct) *
16 5663.73 (0.00 pct) 5915.61 (4.44 pct) [Verification Run]
32 11708.61 (0.00 pct) 11342.37 (-3.12 pct)
64 20415.11 (0.00 pct) 20876.49 (2.25 pct)
128 30134.02 (0.00 pct) 29912.02 (-0.73 pct)
256 41660.75 (0.00 pct) 49418.80 (18.62 pct)
512 49560.67 (0.00 pct) 52372.63 (5.67 pct)
1024 52340.77 (0.00 pct) 53714.13 (2.62 pct)
NPS4
Clients: tip SIS_Eff
1 441.41 (0.00 pct) 446.12 (1.06 pct)
2 863.53 (0.00 pct) 871.30 (0.89 pct)
4 1646.06 (0.00 pct) 1646.85 (0.04 pct)
8 3160.26 (0.00 pct) 3103.85 (-1.78 pct)
16 5605.21 (0.00 pct) 5853.23 (4.42 pct)
32 10657.29 (0.00 pct) 11397.58 (6.94 pct)
64 21054.34 (0.00 pct) 20234.69 (-3.89 pct)
128 31285.51 (0.00 pct) 30188.03 (-3.50 pct)
256 49287.47 (0.00 pct) 51330.34 (4.14 pct)
512 50042.95 (0.00 pct) 52658.13 (5.22 pct)
1024 52589.40 (0.00 pct) 53067.80 (0.90 pct)
~~~~~~
Stream
~~~~~~
- 10 runs
NPS1
Test: tip SIS_Eff
Copy: 211443.49 (0.00 pct) 224768.55 (6.30 pct)
Scale: 209797.67 (0.00 pct) 208050.69 (-0.83 pct)
Add: 250586.89 (0.00 pct) 250268.08 (-0.12 pct)
Triad: 243034.31 (0.00 pct) 244552.37 (0.62 pct)
NPS2
Test: tip SIS_Eff
Copy: 146432.23 (0.00 pct) 140412.56 (-4.11 pct)
Scale: 179508.95 (0.00 pct) 178038.96 (-0.81 pct)
Add: 188328.69 (0.00 pct) 189046.25 (0.38 pct)
Triad: 186353.95 (0.00 pct) 187660.23 (0.70 pct)
NPS4
Test: tip SIS_Eff
Copy: 133934.59 (0.00 pct) 132595.29 (-0.99 pct)
Scale: 179877.71 (0.00 pct) 185094.80 (2.90 pct)
Add: 178079.94 (0.00 pct) 186399.22 (4.67 pct)
Triad: 177277.29 (0.00 pct) 184725.00 (4.20 pct)
- 100 runs
NPS1
Test: tip SIS_Eff
Copy: 220780.64 (0.00 pct) 226194.97 (2.45 pct)
Scale: 204372.85 (0.00 pct) 209461.05 (2.48 pct)
Add: 245548.31 (0.00 pct) 253363.99 (3.18 pct)
Triad: 233611.73 (0.00 pct) 242670.41 (3.87 pct)
NPS2
Test: tip SIS_Eff
Copy: 229624.58 (0.00 pct) 233458.30 (1.66 pct)
Scale: 210163.13 (0.00 pct) 211198.12 (0.49 pct)
Add: 261992.62 (0.00 pct) 260243.74 (-0.66 pct)
Triad: 248713.02 (0.00 pct) 247594.21 (-0.44 pct)
NPS4
Test: tip SIS_Eff
Copy: 249308.79 (0.00 pct) 245362.22 (-1.58 pct)
Scale: 218948.88 (0.00 pct) 217819.07 (-0.51 pct)
Add: 268469.03 (0.00 pct) 270935.96 (0.91 pct)
Triad: 251920.99 (0.00 pct) 255730.95 (1.51 pct)
~~~~~~~~~~~~
ycsb-mongodb
~~~~~~~~~~~~
NPS1
tip: 289306.33 (var: 0.91)
SIS_Eff: 293789.33 (var: 1.38) (1.54 pct)
NPS2
NPS2
tip: 290226.00 (var: 1.62)
SIS_Eff 290796.00 (var: 1.76) (0.19 pct)
NPS4
tip: 290427.33 (var: 1.57)
SIS_Eff: 288134.33 (var: 0.88) (-0.78pct)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Hackbench - 15 runs statistics
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
o NPS 4 - 16 groups (SIS_UTIL)
- tip
Min : 7.35
Max : 12.66
Median : 10.60
AMean : 10.00
GMean : 9.82
HMean : 9.64
AMean Stddev : 1.88
AMean CoefVar : 18.85 pct
- SIS_Eff
Min : 12.32
Max : 18.92
Median : 13.82
AMean : 14.96 (-49.60 pct)
GMean : 14.80
HMean : 14.66
AMean Stddev : 2.25
AMean CoefVar : 15.01 pct
o NPS 4 - 16 groups (SIS_PROP)
- tip
Min : 7.04
Max : 8.22
Median : 7.49
AMean : 7.52
GMean : 7.52
HMean : 7.51
AMean Stddev : 0.29
AMean CoefVar : 3.88 pct
- SIS_Eff
Min : 7.04
Max : 9.78
Median : 8.16
AMean : 8.42 (-11.06 pct)
GMean : 8.39
HMean : 8.36
AMean Stddev : 0.78
AMean CoefVar : 9.23 pct
The Hackbench regression is much more noticeable with SIS_UTIL
enabled but only when the test machine is running in NPS4 mode.
It is not obvious why this is happening given the patch series
aims at improving SIS Efficiency.
It would be great if you can test the series with SIS_UTIL
enabled and SIS_PROP disabled to see if it effects any benchmark
behavior given SIS_UTIL is the default SIS logic currently on
the tip.
>
> [..snip..]
>
Please let me know if you need any more data from the
test system.
--
Thanks and Regards,
Prateek
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