CLOMP

CLOMP is the C version of the Livermore OpenMP benchmark developed to measure OpenMP overheads and other performance impacts due to threading in order to influence future system designs. This particular test profile configuration is currently set to look at the OpenMP static schedule speed-up across all available CPU cores using the recommended test configuration.

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

Project Site

asc.llnl.gov

Source Repository

gitlab.com

Test Created

6 December 2010

Last Updated

6 December 2021

Test Maintainer

 

Test Type

Processor

Average Install Time

15 Seconds

Average Run Time

1 Minute, 37 Seconds

Test Dependencies

C/C++ Compiler Toolchain

Accolades

150k+ Downloads

Supported Platforms


Public Result Uploads *Reported Test Completions **Reported Installs **Test Profile Page Views ***OpenBenchmarking.orgEventsCLOMP Popularity Statisticspts/clomp2010.122011.052011.102012.032012.082013.012013.062013.112014.042014.092015.022015.072015.122016.052016.102017.032017.082018.012018.062018.112019.042019.092020.022020.072020.122021.052021.102022.032022.082023.012023.062023.112024.047K14K21K28K35K
* 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.
*** Test profile page view reporting began March 2021.
Data updated weekly as of 15 June 2024.

Revision History

pts/clomp-1.1.2   [View Source]   Mon, 06 Dec 2021 19:31:37 GMT
Fix for install-exit-status.

pts/clomp-1.1.1   [View Source]   Sat, 19 Dec 2020 13:49:02 GMT
Correct test-exit-status to install-exit-status.

pts/clomp-1.1.0   [View Source]   Sat, 19 Dec 2020 13:48:18 GMT
Update against latest upstream.

pts/clomp-1.0.0   [View Source]   Mon, 06 Dec 2010 14:35:49 GMT
Initial import into OpenBenchmarking.org

Suites Using This Test

C/C++ Compiler Tests

CPU Massive


Performance Metrics

Analyze Test Configuration:

CLOMP 1.2

Static OMP Speedup

OpenBenchmarking.org metrics for this test profile configuration based on 751 public results since 19 December 2020 with the latest data as of 18 June 2024.

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
Speedup (Average)
100th
3
65.8 +/- 1.8
100th
3
57.5 +/- 0.4
96th
9
50.2 +/- 0.4
94th
5
46.3 +/- 2.0
94th
10
45.3 +/- 2.4
91st
4
36.5 +/- 1.3
89th
3
31.8 +/- 0.3
89th
7
31.8 +/- 0.5
88th
5
31.5 +/- 2.7
87th
3
30.7 +/- 0.4
87th
9
30.6 +/- 1.6
84th
8
26.5 +/- 1.0
84th
3
26.5 +/- 0.3
82nd
3
24.9 +/- 1.4
82nd
3
24.5 +/- 0.2
81st
6
24.3 +/- 0.4
81st
6
24.0 +/- 0.3
80th
7
23.7 +/- 0.8
79th
5
23.3 +/- 0.3
78th
3
22.9 +/- 1.0
77th
5
21.9 +/- 0.3
Mid-Tier
75th
< 21.2
74th
28
20.7 +/- 0.5
71st
3
16.9 +/- 0.2
71st
9
16.8 +/- 1.1
69th
3
13.2 +/- 0.1
68th
3
12.4 +/- 1.2
68th
3
11.9 +/- 0.1
65th
3
10.1 +/- 0.2
65th
6
10.0 +/- 0.3
64th
3
9.5 +/- 0.1
63rd
9
9.4 +/- 0.6
61st
4
8.3 +/- 0.5
61st
3
8.2 +/- 0.6
59th
3
7.7 +/- 0.5
59th
11
7.2 +/- 0.1
57th
5
6.7 +/- 0.4
56th
11
5.9 +/- 0.1
54th
10
5.6 +/- 0.5
53rd
5
5.2 +/- 0.1
52nd
3
5.1 +/- 0.1
52nd
14
5.0 +/- 0.5
51st
3
4.9 +/- 0.4
51st
12
4.9 +/- 0.2
Median
50th
4.9
50th
4
4.8 +/- 0.2
49th
4
4.7 +/- 0.5
47th
6
4.5 +/- 0.1
46th
4
3.8 +/- 0.1
44th
3
3.5 +/- 0.2
44th
4
3.4 +/- 0.1
43rd
9
3.2 +/- 0.2
42nd
7
3.1 +/- 0.1
42nd
6
3.1 +/- 0.1
40th
5
2.9 +/- 0.1
40th
5
2.9 +/- 0.1
40th
4
2.9 +/- 0.1
40th
3
2.9 +/- 0.1
29th
9
1.9 +/- 0.1
29th
5
1.9 +/- 0.1
Low-Tier
25th
< 1.9
25th
7
1.8 +/- 0.2
23rd
4
1.7 +/- 0.1
21st
4
1.6 +/- 0.1
19th
6
1.5 +/- 0.1
16th
3
1.4 +/- 0.1
15th
6
1.3 +/- 0.1
15th
7
1.3 +/- 0.1
15th
3
1.3 +/- 0.1
15th
3
1.3 +/- 0.1
11th
3
1.2 +/- 0.1
11th
3
1.2 +/- 0.1
7th
3
1.0 +/- 0.1
OpenBenchmarking.orgDistribution Of Public Results - Static OMP Speedup749 Results Range From 0 To 68 Speedup6121824303642485460667290180270360450

Based on OpenBenchmarking.org data, the selected test / test configuration (CLOMP 1.2 - Static OMP Speedup) has an average run-time of 9 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 BenchmarkStatic OMP SpeedupRun-Time1122334455Min: 1 / Avg: 8.43 / Max: 53

Based on public OpenBenchmarking.org results, the selected test / test configuration has an average standard deviation of 1.6%.

OpenBenchmarking.orgPercent, Fewer Is BetterAverage Deviation Between RunsStatic OMP SpeedupDeviation510152025Min: 0 / Avg: 1.6 / Max: 21

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.

AMDIntelOpenBenchmarking.orgRelative Core Scaling To BaseCLOMP CPU Core ScalingStatic OMP Speedup46812163264918273645

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
SSE2 (SSE2)
Used by default on supported hardware.
 
CVTSI2SD DIVSD MULSD ADDSD MOVAPD ANDPD UCOMISD COMISD CVTTSD2SI SUBSD ANDNPD CMPNLESD ORPD MOVHPD MAXSD PUNPCKLQDQ
FMA (FMA)
Requires passing a supported compiler/build flag (verified with targets: skylake, tigerlake, cascadelake, sapphirerapids, alderlake, znver2, znver3).
Found on Intel processors since Haswell (2013).
Found on AMD processors since Bulldozer (2011).

 
VFMADD132SD VFMADD231SD VFNMADD132SD VFMADD213SD
The test / benchmark does honor compiler flag changes.
Last automated analysis: 17 January 2022

This test profile binary relies on the shared libraries libgomp.so.1, libc.so.6.

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)
RISC-V 64-bit
riscv64
SiFive RISC-V
IBM POWER (PowerPC) 64-bit
ppc64le
POWER9 4-Core, POWER9 44-Core
Loongson LoongArch 64-bit
loongarch64
Loongson-3A5000, Loongson-3A5000-HV, Loongson-3A6000, Loongson-3C5000L
ARMv7 32-bit
armv7l
ARMv7 Cortex-A72 4-Core
ARMv8 64-bit
aarch64
ARMv8 Cortex-A72 16-Core, ARMv8 Cortex-A72 4-Core, ARMv8 Cortex-A76 4-Core, ARMv8 Neoverse-V1, Ampere ARMv8 Neoverse-N1 160-Core, Ampere Altra ARMv8 Neoverse-N1 160-Core, Ampere eMAG ARMv8 32-Core, Rockchip ARMv8 Cortex-A76 4-Core

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