OV - Compare Index

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▶Compared Reports

r0: run_1_thread
r1: run_2_threads
r2: run_4_threads
r3: run_8_threads
r4: run_16_threads
r5: run_26_threads

Global Metrics

Metric		r0	r1	r2	r3	r4	r5
Total Time (s)		155.45	124.11	108.46	100.97	107.23	95.65
Max (Thread Active Time) (s)		153.27	76.69	38.39	19.32	10.39	6.15
Average Active Time (s)		153.27	54.05	21.41	9.41	4.49	2.90
Activity Ratio (%)		98.6	69.5	55.0	48.0	42.6	45.7
Average number of active threads		0.986	0.871	0.790	0.746	0.670	0.789
Affinity Stability (%)		40.0	40.0	40.1	40.3	38.3	43.1
GFLOPS		15.147	18.963	21.701	23.272	22.642	21.698
Time in analyzed loops (%)		100.0	99.9	99.9	99.8	99.4	94.8
Time in analyzed innermost loops (%)		94.7	94.6	94.6	94.2	94.4	92.1
Time in user code (%)		100	100.0	99.9	99.8	99.4	94.8
Compilation Options Score (%)		100	100	100	100	100	100
Array Access Efficiency (%)		97.4	97.3	97.3	97.0	96.0	92.8

Potential Speedups
Perfect Flow Complexity		1.00	1.00	1.00	1.00	1.00	1.00
Perfect OpenMP/MPI/Pthread/TBB		1.00	1.00	1.00	1.00	1.00	1.01
Perfect OpenMP/MPI/Pthread/TBB + Perfect Load Distribution		1.00	1.42	1.80	2.06	2.33	2.23
Scalability - Gap		1.00	1.60	2.79	5.20	11.04	16.00
No Scalar Integer	Potential Speedup	1.17	1.17	1.17	1.17	1.16	1.13
No Scalar Integer	Nb Loops to get 80%	1	1	1	1	1	1
FP Vectorised	Potential Speedup	1.59	1.59	1.59	1.58	1.57	1.49
FP Vectorised	Nb Loops to get 80%	1	1	1	1	1	1
Fully Vectorised	Potential Speedup	2.30	2.30	2.30	2.31	2.34	2.35
Fully Vectorised	Nb Loops to get 80%	1	1	1	1	2	2
Only FP Arithmetic	Potential Speedup	1.49	1.49	1.49	1.50	1.51	1.52
Only FP Arithmetic	Nb Loops to get 80%	1	1	1	1	2	2

Scalability Speedup

Cumulated Speedup If No Scalar Integer

Cumulated Speedup If FP Vectorized

Cumulated Speedup If Fully Vectorized

Cumulated Speedup If Only FP Arithmetic

Loop Based Profiles

Innermost / Single Loops

Inbetween Loops

Outermost Loops

Cumulated Coverage With All Loops

Innermost Loop Based Profiles

Coverage

Count

Application Categorization

Time

Coverage

Compilation Options

Source Object	Issue
▼kmeans-icpx-Ofast–
▼main.cpp–
○

Path Count Profiles

Coverage

Count

Low Iteration Count Profiles

Coverage

Count

Average Number of Active Threads

Run 1 - run_1_thread

Run 2 - run_2_threads

Run 3 - run_4_threads

Run 4 - run_8_threads

Run 5 - run_16_threads

Run 6 - run_26_threads

Experiment Summaries

	r0	r1	r2	r3	r4	r5
Experiment Name	K-Means scalability icpx-Ofast 100000000	K-Means scalability icpx-Ofast 100000000	K-Means scalability icpx-Ofast 100000000	K-Means scalability icpx-Ofast 100000000	K-Means scalability icpx-Ofast 100000000	K-Means scalability icpx-Ofast 100000000
Application	./kmeans/kmeans-icpx-Ofast	same as r0	same as r0	same as r0	same as r0	same as r0
Timestamp	2025-08-14 14:09:15	same as r0	same as r0	same as r0	same as r0	same as r0
Experiment Type	Sequential	OpenMP;	same as r1	same as r1	same as r1	same as r1
Machine	skylake	same as r0	same as r0	same as r0	same as r0	same as r0
Architecture	x86_64	same as r0	same as r0	same as r0	same as r0	same as r0
Micro Architecture	SKYLAKE	same as r0	same as r0	same as r0	same as r0	same as r0
Model Name	Intel(R) Xeon(R) Platinum 8170 CPU @ 2.10GHz	same as r0	same as r0	same as r0	same as r0	same as r0
Cache Size	36608 KB	same as r0	same as r0	same as r0	same as r0	same as r0
Number of Cores	26	same as r0	same as r0	same as r0	same as r0	same as r0
Maximal Frequency	2.1 GHz	same as r0	same as r0	same as r0	same as r0	same as r0
OS Version	Linux 6.15.5-arch1-1 #1 SMP PREEMPT_DYNAMIC Sun, 06 Jul 2025 11:14:36 +0000	same as r0	same as r0	same as r0	same as r0	same as r0
Architecture used during static analysis	x86_64	same as r0	same as r0	same as r0	same as r0	same as r0
Micro Architecture used during static analysis	SKYLAKE	same as r0	same as r0	same as r0	same as r0	same as r0
Compilation Options	kmeans-icpx-Ofast: clang based Intel(R) oneAPI DPC++/C++ Compiler 2024.2.1 (2024.2.1.20240711) --driver-mode=g++ --intel -I . -MMD -MP -Wall -std=c++14 -g -fno-omit-frame-pointer -fiopenmp -Ofast -x Host -mtune=native -c -o main.o main.cpp -fveclib=SVML -faltmathlib=SVML -fheinous-gnu-extensions	same as r0	same as r0	same as r0	same as r0	same as r0
Number of processes observed	1	same as r0	same as r0	same as r0	same as r0	same as r0
Number of threads observed	1	2	4	8	16	26
Frequency Driver	intel_cpufreq	same as r0	same as r0	same as r0	same as r0	same as r0
Frequency Governor	schedutil	same as r0	same as r0	same as r0	same as r0	same as r0
Huge Pages	always	same as r0	same as r0	same as r0	same as r0	same as r0
Hyperthreading	off	same as r0	same as r0	same as r0	same as r0	same as r0
Number of sockets	2	same as r0	same as r0	same as r0	same as r0	same as r0
Number of cores per socket	26	same as r0	same as r0	same as r0	same as r0	same as r0
MAQAO version	2025.1.2	same as r0	same as r0	same as r0	same as r0	same as r0
MAQAO build	3c12046452d68b38e394be5cd9e057265a89bbcf::20250812-175904	same as r0	same as r0	same as r0	same as r0	same as r0
Comments	Intel Xeon Platinum 8170 (Skylake CPU), 1-26 threads runs	same as r0	same as r0	same as r0	same as r0	same as r0

Report Configuration

▶Compared Reports

Global Metrics

Scalability Speedup

Cumulated Speedup If No Scalar Integer

Cumulated Speedup If FP Vectorized

Cumulated Speedup If Fully Vectorized

Cumulated Speedup If Only FP Arithmetic

Loop Based Profiles

Innermost / Single Loops

Inbetween Loops

Outermost Loops

Cumulated Coverage With All Loops

Innermost Loop Based Profiles

Coverage

Count

Application Categorization

Time

Coverage

Compilation Options

Path Count Profiles

Coverage

Count

Low Iteration Count Profiles

Coverage

Count

Average Number of Active Threads

Run 1 - run_1_thread

Run 2 - run_2_threads

Run 3 - run_4_threads

Run 4 - run_8_threads

Run 5 - run_16_threads

Run 6 - run_26_threads

Experiment Summaries