nekRS

nekRS is an open-source Navier Stokes solver based on the spectral element method. NekRS supports both CPU and GPU/accelerator support though this test profile is currently configured for CPU execution. NekRS is part of Nek5000 of the Mathematics and Computer Science MCS at Argonne National Laboratory. This nekRS benchmark is primarily relevant to large core count HPC servers and otherwise may be very time consuming on smaller systems.

To run this test with the Phoronix Test Suite, the basic command is: phoronix-test-suite benchmark nekrs.

Project Site

nek5000.mcs.anl.gov

Source Repository

github.com

Test Created

8 November 2022

Last Updated

4 June 2023

Test Maintainer

Michael Larabel 

Test Type

Processor

Average Install Time

1 Minute, 26 Seconds

Average Run Time

18 Minutes, 47 Seconds

Test Dependencies

OpenMPI + CMake + C/C++ Compiler Toolchain

Accolades

20k+ Downloads

Supported Platforms


Public Result Uploads *Reported Installs **Reported Test Completions **Test Profile Page ViewsOpenBenchmarking.orgEventsnekRS Popularity Statisticspts/nekrs2022.112022.122023.012023.022023.032023.042023.052023.062023.072023.082023.092023.102023.112023.122024.012024.022024.032024.042024.052024.0611002200330044005500
* Uploading of benchmark result data to OpenBenchmarking.org is always optional (opt-in) via the Phoronix Test Suite for users wishing to share their results publicly.
** Data based on those opting to upload their test results to OpenBenchmarking.org and users enabling the opt-in anonymous statistics reporting while running benchmarks from an Internet-connected platform.
Data updated weekly as of 15 June 2024.
Kershaw50.3%TurboPipe Periodic49.7%Input Option PopularityOpenBenchmarking.org

Revision History

pts/nekrs-1.1.0   [View Source]   Sun, 04 Jun 2023 20:11:43 GMT
Update against nekRS 23 upstream.

pts/nekrs-1.0.0   [View Source]   Tue, 08 Nov 2022 18:57:06 GMT
Add nekRS scalable CFD benchmark.

Suites Using This Test

HPC - High Performance Computing


Performance Metrics

Analyze Test Configuration:

nekRS 23.0

Input: Kershaw

OpenBenchmarking.org metrics for this test profile configuration based on 245 public results since 4 June 2023 with the latest data as of 30 October 2023.

Below is an overview of the generalized performance for components where there is sufficient statistically significant data based upon user-uploaded results. It is important to keep in mind particularly in the Linux/open-source space there can be vastly different OS configurations, with this overview intended to offer just general guidance as to the performance expectations.

Component
Percentile Rank
# Compatible Public Results
flops/rank (Average)
100th
4
12800353333 +/- 427629288
98th
6
11455766667 +/- 123865115
97th
3
11057966667 +/- 211097355
95th
6
10237225000 +/- 187983110
93rd
4
9192422500 +/- 75560543
91st
4
8863695000 +/- 233702674
88th
3
8285166667 +/- 70519766
87th
4
8222346667 +/- 465390635
86th
3
8124566667 +/- 26331829
83rd
3
7491736667 +/- 43910284
81st
4
7277980000 +/- 9711032
80th
3
6930664444 +/- 330298088
79th
4
6751504167 +/- 523048334
78th
4
6724270000 +/- 242487
Mid-Tier
75th
< 6603000000
72nd
3
6387210000
70th
21
6304686706 +/- 325892703
68th
4
6084607500 +/- 80874964
62nd
6
5739568889 +/- 42154394
60th
6
5710816667 +/- 37396529
59th
6
5642100000 +/- 108865336
56th
6
4742400000 +/- 71948835
54th
3
4653558889 +/- 180401958
Median
50th
4495660000
50th
6
4473080000 +/- 24735151
48th
6
4442480000 +/- 74928446
44th
4
4267857500 +/- 52075869
40th
11
3634780303 +/- 80515089
38th
6
3624445000 +/- 9897347
32nd
6
3289403333 +/- 22254508
29th
4
3261400000 +/- 646632
26th
3
3122730000
Low-Tier
25th
< 3122730000
24th
3
2961128889 +/- 7216717
23rd
7
2904119524 +/- 108016945
23rd
6
2889336667 +/- 233354810
19th
4
2667765000 +/- 548483
16th
4
2116343334 +/- 7740343
15th
4
2103476667 +/- 1835657
13th
4
2055712500 +/- 2086777
11th
4
2032139167 +/- 2927330
9th
4
1949529167 +/- 17194802
8th
3
1931180000 +/- 7111336
7th
4
1774375000 +/- 3423687
4th
8
1291546250 +/- 1761867
OpenBenchmarking.orgDistribution Of Public Results - Input: Kershaw245 Results Range From 1288506667 To 13234413333 flops/rank1288506667152742480117663429352005261069224417920324830973372722015471296093360531998517393438769873367768800739166061414155524275439444240946333605434872278677511119681153501149455589033079582795121360668693476305787481654470561567836237497022541883726146001775003781517739296285797821441982171325538456050687869496882189338869559172805089941172322396506413579889559491101284776251036739575910606313893108452320271108415016111323068295115619864291180090456312039822697122787408311251765896512756577099129954952331323441336748121620

Based on OpenBenchmarking.org data, the selected test / test configuration (nekRS 23.0 - Input: Kershaw) has an average run-time of 12 minutes. By default this test profile is set to run at least 3 times but may increase if the standard deviation exceeds pre-defined defaults or other calculations deem additional runs necessary for greater statistical accuracy of the result.

OpenBenchmarking.orgMinutesTime Required To Complete BenchmarkInput: KershawRun-Time816243240Min: 1 / Avg: 11.05 / Max: 37

Based on public OpenBenchmarking.org results, the selected test / test configuration has an average standard deviation of 0.1%.

OpenBenchmarking.orgPercent, Fewer Is BetterAverage Deviation Between RunsInput: KershawDeviation246810Min: 0 / Avg: 0.15 / Max: 2

Does It Scale Well With Increasing Cores?

Yes, based on the automated analysis of the collected public benchmark data, this test / test settings does generally scale well with increasing CPU core counts. Data based on publicly available results for this test / test settings, separated by vendor, result divided by the reference CPU clock speed, grouped by matching physical CPU core count, and normalized against the smallest core count tested from each vendor for each CPU having a sufficient number of test samples and statistically significant data.

OpenBenchmarking.orgRelative Core Scaling To BasenekRS CPU Core ScalingInput: Kershaw681216321281.07662.15323.22984.30645.383

Notable Instruction Set Usage

Notable instruction set extensions supported by this test, based on an automatic analysis by the Phoronix Test Suite / OpenBenchmarking.org analytics engine.

Instruction Set
Support
Instructions Detected
Used by default on supported hardware.
Found on Intel processors since Sandy Bridge (2011).
Found on AMD processors since Bulldozer (2011).

 
VZEROUPPER VBROADCASTSD VINSERTF128 VEXTRACTF128 VBROADCASTSS VPERMILPD VPERMILPS
Used by default on supported hardware.
Found on Intel processors since Haswell (2013).
Found on AMD processors since Excavator (2016).

 
VPBROADCASTD VPBROADCASTW VPERMQ VPBROADCASTQ VEXTRACTI128 VINSERTI128 VPBROADCASTB VGATHERDPD VPERM2I128 VPGATHERDQ VPGATHERDD VGATHERDPS VPSRAVD VPERMPD VPGATHERQQ VPERMD VPGATHERQD
FMA (FMA)
Used by default on supported hardware.
Found on Intel processors since Haswell (2013).
Found on AMD processors since Bulldozer (2011).

 
VFMADD132SD VFNMADD132SD VFMADD213SD VFMADD231SD VFMSUB231SD VFMADD132PD VFNMADD231SD VFMSUB132SD VFMADD231SS VFMADD231PS VFNMADD132PD VFMADD231PD VFMADD213PD VFNMADD231PD VFNMADD213SD VFMSUB132PD VFNMADD213PD VFNMSUB132SD VFMSUB231PD VFNMADD213PS VFNMADD132PS VFNMADD213SS VFNMADD132SS VFMSUB132SS VFMADD213PS VFMADD132PS VFMADD213SS VFMADD132SS VFNMADD231SS VFMSUB231SS VFNMSUB132SS
Advanced Vector Extensions 512 (AVX512)
Requires passing a supported compiler/build flag (verified with targets: cascadelake, sapphirerapids).
 
(ZMM REGISTER USE)
The test / benchmark does honor compiler flag changes.
Last automated analysis: 24 June 2023

This test profile binary relies on the shared libraries libnekrs.so, libmpi.so.40, libm.so.6, libc.so.6, libnekrs-hypre.so, libnekrs-hypre-device.so, libocca.so, libgomp.so.1, libgfortran.so.5, libopen-pal.so.40, libopen-rte.so.40, libhwloc.so.15, libquadmath.so.0, libz.so.1, libudev.so.1.

Tested CPU Architectures

This benchmark has been successfully tested on the below mentioned architectures. The CPU architectures listed is where successful OpenBenchmarking.org result uploads occurred, namely for helping to determine if a given test is compatible with various alternative CPU architectures.

CPU Architecture
Kernel Identifier
Verified On
Intel / AMD x86 64-bit
x86_64
(Many Processors)
ARMv8 64-bit
aarch64
ARMv8 Neoverse-N1, ARMv8 Neoverse-V1

Recent Test Results

OpenBenchmarking.org Results Compare

6 Systems - 87 Benchmark Results

AMD EPYC 7R13 - Amazon EC2 c6a.16xlarge - Intel 440FX 82441FX PMC

Ubuntu 22.04 - 5.19.0-1025-aws - 1.3.238

1 System - 494 Benchmark Results

Find More Test Results