OV - Compare Index

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▶Compared Reports

Global Metrics

Metric		r0	r1	r2	r3	r4	r5	r6	r7	r8
Total Time (s)		118.93	118.94	111.60	113.70	113.81	111.19	111.26	111.19	106.67
Max (Thread Active Time) (s)		118.60	118.64	34.17	32.28	32.35	31.70	29.93	29.85	29.02
Average Active Time (s)		118.54	118.53	26.69	32.21	32.26	24.13	29.80	29.77	21.75
Activity Ratio (%)		99.7	99.7	77.5	28.3	28.4	75.2	26.8	26.8	73.7
Average number of active threads		9.968	9.965	2.392	2.833	2.835	2.170	2.678	2.678	2.039
Affinity Stability (%)		23.9	23.9	75.1	20.4	20.3	72.5	18.8	18.8	70.6
GFLOPS		22.200	22.157	8.977	7.792	7.623	7.868	7.572	8.247	8.305
Time in analyzed loops (%)		95.5	95.3	94.7	94.9	95.0	94.8	92.2	92.6	92.6
Time in analyzed innermost loops (%)		94.5	94.3	93.8	92.9	92.9	92.8	91.4	91.9	91.8
Time in user code (%)		95.5	95.3	94.7	94.8	95.0	94.8	92.2	92.6	92.6
Compilation Options Score (%)		62.5	75.0	75.0	16.7	16.7	16.7	100	100	100
Array Access Efficiency (%)		100	100	100	99.6	99.6	99.6	Not Available	Not Available	Not Available

Potential Speedups
Perfect Flow Complexity		1.00	1.00	1.00	1.00	1.00	1.00	2.96	3.57	3.43
Perfect OpenMP/MPI/Pthread/TBB		1.01	1.01	1.10	1.01	1.02	1.12	1.02	1.02	1.15
Perfect OpenMP/MPI/Pthread/TBB + Perfect Load Distribution		1.05	1.05	1.35	1.06	1.06	1.39	1.09	1.08	1.44
No Scalar Integer	Potential Speedup	1.05	1.05	1.16	1.22	1.21	1.22	1.08	1.08	1.08
No Scalar Integer	Nb Loops to get 80%	1	1	1	1	1	1	1	1	1
FP Vectorised	Potential Speedup	2.27	2.27	1.93	2.20	2.13	2.19	1.74	1.86	1.84
FP Vectorised	Nb Loops to get 80%	1	1	1	1	1	1	1	1	1
Fully Vectorised	Potential Speedup	5.17	5.13	3.54	5.42	4.87	4.69	3.02	3.64	3.51
Fully Vectorised	Nb Loops to get 80%	1	1	1	1	1	1	1	1	1
Only FP Arithmetic	Potential Speedup	1.28	1.28	1.22	1.28	1.27	1.55	1.31	1.34	1.34
Only FP Arithmetic	Nb Loops to get 80%	1	1	1	1	1	1	1	1	1

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-gcc-O2–
▼main.cpp–
○	-O3 or -Ofast is missing.
○	-funroll-loops is missing.

Source Object	Issue
▼kmeans-gcc-O3–
▼main.cpp–
○	-funroll-loops is missing.

Source Object	Issue
▼kmeans-gcc-Ofast–
▼main.cpp–
○	-funroll-loops is missing.

Source Object	Issue
▼kmeans-clang-O2–
▼main.cpp–
○	-g is missing for some functions (possibly ones added by the compiler), but debug locations are available. Some analysis may be inaccurate. Try to complement -g with -grecord-gcc-switches or -frecord-command-line.
○	-O2, -O3 or -Ofast is missing.
○	-march=(target) is missing.

Source Object	Issue
▼kmeans-clang-O3–
▼main.cpp–
○	-g is missing for some functions (possibly ones added by the compiler), but debug locations are available. Some analysis may be inaccurate. Try to complement -g with -grecord-gcc-switches or -frecord-command-line.
○	-O2, -O3 or -Ofast is missing.
○	-march=(target) is missing.

Source Object	Issue
▼kmeans-clang-O3-ffast-math–
▼main.cpp–
○	-g is missing for some functions (possibly ones added by the compiler), but debug locations are available. Some analysis may be inaccurate. Try to complement -g with -grecord-gcc-switches or -frecord-command-line.
○	-O2, -O3 or -Ofast is missing.
○	-march=(target) is missing.

Source Object	Issue
▼kmeans-icpx-O2–
▼main.cpp–
○

Source Object	Issue
▼kmeans-icpx-O3–
▼main.cpp–
○

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 - Cascade Lake G++ O2

Run 2 - Cascade Lake G++ O3

Run 3 - Cascade Lake G++ Ofast

Run 4 - Cascade Lake Clang O2

Run 5 - Cascade Lake Clang O3

Run 6 - Cascade Lake Clang O3 + ffast-math

Run 7 - Cascade Lake ICPX O2

Run 8 - Cascade Lake ICPX O3

Run 9 - Cascade Lake ICPX Ofast

Experiment Summaries

	r0	r1	r2	r3	r4	r5	r6	r7	r8
Experiment Name	K-Means scalability gcc-O2 100000000	K-Means scalability gcc-O3 100000000	K-Means scalability gcc-Ofast 100000000	K-Means scalability clang-O2 100000000	K-Means scalability clang-O3 100000000	K-Means scalability clang-O3-ffast-math 100000000	K-Means scalability icpx-O2 100000000	K-Means scalability icpx-O3 100000000	K-Means scalability icpx-Ofast 100000000
Application	./kmeans/kmeans-gcc-O2	./kmeans/kmeans-gcc-O3	./kmeans/kmeans-gcc-Ofast	./kmeans/kmeans-clang-O2	./kmeans/kmeans-clang-O3	./kmeans/kmeans-clang-O3-ffast-math	./kmeans/kmeans-icpx-O2	./kmeans/kmeans-icpx-O3	./kmeans/kmeans-icpx-Ofast
Timestamp	2025-08-05 09:27:39	2025-08-05 09:44:13	2025-08-05 10:00:48	2025-08-04 21:23:52	2025-08-04 21:38:48	2025-08-04 21:53:43	2025-08-04 22:08:21	2025-08-04 22:22:26	2025-08-04 22:36:31
Experiment Type	OpenMP;	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0
Machine	otterfall	same as r0	same as r0	same as r0	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	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	same as r0	same as r0	same as r0
Model Name	Intel(R) Xeon(R) Silver 4210R CPU @ 2.40GHz	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0
Cache Size	14080 KB	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0
Number of Cores	10	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0
Maximal Frequency	2.4 GHz	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0
OS Version	Linux 6.15.3-arch1-1 #1 SMP PREEMPT_DYNAMIC Thu, 19 Jun 2025 14:41:19 +0000	same as r0	same as r0	same as r0	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	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	same as r0	same as r0	same as r0
Compilation Options	kmeans-gcc-O2: GNU C++14 15.1.1 20250425 -march=cascadelake -mmmx -mpopcnt -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -mavx -mavx2 -mno-sse4a -mno-fma4 -mno-xop -mfma -mavx512f -mbmi -mbmi2 -maes -mpclmul -mavx512vl -mavx512bw -mavx512dq -mavx512cd -mno-avx512vbmi -mno-avx512ifma -mno-avx512vpopcntdq -mno-avx512vbmi2 -mno-gfni -mno-vpclmulqdq -mavx512vnni -mno-avx512bitalg -mno-avx512bf16 -mno-avx512vp2intersect -mno-3dnow -madx -mabm -mno-cldemote -mclflushopt -mclwb -mno-clzero -mcx16 -mno-enqcmd -mf16c -mfsgsbase -mfxsr -mno-hle -msahf -mno-lwp -mlzcnt -mmovbe -mno-movdir64b -mno-movdiri -mno-mwaitx -mno-pconfig -mpku -mprfchw -mno-ptwrite -mno-rdpid -mrdrnd -mrdseed -mno-rtm -mno-serialize -mno-sgx -mno-sha -mno-shstk -mno-tbm -mno-tsxldtrk -mno-vaes -mno-waitpkg -mno-wbnoinvd -mxsave -mxsavec -mxsaveopt -mxsaves -mno-amx-tile -mno-amx-int8 -mno-amx-bf16 -mno-uintr -mno-hreset -mno-kl -mno-widekl -mno-avxvnni -mno-avx512fp16 -mno-avxifma -mno-avxvnniint8 -mno-avxneconvert -mno-cmpccxadd -mno-amx-fp16 -mno-prefetchi -mno-raoint -mno-amx-complex -mno-avxvnniint16 -mno-sm3 -mno-sha512 -mno-sm4 -mno-apxf -mno-usermsr -mno-avx10.2 -mno-amx-avx512 -mno-amx-tf32 -mno-amx-transpose -mno-amx-fp8 -mno-movrs -mno-amx-movrs --param=l1-cache-size=32 --param=l1-cache-line-size=64 --param=l2-cache-size=14080 -mtune=cascadelake -g -O2 -std=c++14 -fno-omit-frame-pointer -fopenmp	kmeans-gcc-O3: GNU C++14 15.1.1 20250425 -march=cascadelake -mmmx -mpopcnt -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -mavx -mavx2 -mno-sse4a -mno-fma4 -mno-xop -mfma -mavx512f -mbmi -mbmi2 -maes -mpclmul -mavx512vl -mavx512bw -mavx512dq -mavx512cd -mno-avx512vbmi -mno-avx512ifma -mno-avx512vpopcntdq -mno-avx512vbmi2 -mno-gfni -mno-vpclmulqdq -mavx512vnni -mno-avx512bitalg -mno-avx512bf16 -mno-avx512vp2intersect -mno-3dnow -madx -mabm -mno-cldemote -mclflushopt -mclwb -mno-clzero -mcx16 -mno-enqcmd -mf16c -mfsgsbase -mfxsr -mno-hle -msahf -mno-lwp -mlzcnt -mmovbe -mno-movdir64b -mno-movdiri -mno-mwaitx -mno-pconfig -mpku -mprfchw -mno-ptwrite -mno-rdpid -mrdrnd -mrdseed -mno-rtm -mno-serialize -mno-sgx -mno-sha -mno-shstk -mno-tbm -mno-tsxldtrk -mno-vaes -mno-waitpkg -mno-wbnoinvd -mxsave -mxsavec -mxsaveopt -mxsaves -mno-amx-tile -mno-amx-int8 -mno-amx-bf16 -mno-uintr -mno-hreset -mno-kl -mno-widekl -mno-avxvnni -mno-avx512fp16 -mno-avxifma -mno-avxvnniint8 -mno-avxneconvert -mno-cmpccxadd -mno-amx-fp16 -mno-prefetchi -mno-raoint -mno-amx-complex -mno-avxvnniint16 -mno-sm3 -mno-sha512 -mno-sm4 -mno-apxf -mno-usermsr -mno-avx10.2 -mno-amx-avx512 -mno-amx-tf32 -mno-amx-transpose -mno-amx-fp8 -mno-movrs -mno-amx-movrs --param=l1-cache-size=32 --param=l1-cache-line-size=64 --param=l2-cache-size=14080 -mtune=cascadelake -g -O3 -std=c++14 -fno-omit-frame-pointer -fopenmp	kmeans-gcc-Ofast: GNU C++14 15.1.1 20250425 -march=cascadelake -mmmx -mpopcnt -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -mavx -mavx2 -mno-sse4a -mno-fma4 -mno-xop -mfma -mavx512f -mbmi -mbmi2 -maes -mpclmul -mavx512vl -mavx512bw -mavx512dq -mavx512cd -mno-avx512vbmi -mno-avx512ifma -mno-avx512vpopcntdq -mno-avx512vbmi2 -mno-gfni -mno-vpclmulqdq -mavx512vnni -mno-avx512bitalg -mno-avx512bf16 -mno-avx512vp2intersect -mno-3dnow -madx -mabm -mno-cldemote -mclflushopt -mclwb -mno-clzero -mcx16 -mno-enqcmd -mf16c -mfsgsbase -mfxsr -mno-hle -msahf -mno-lwp -mlzcnt -mmovbe -mno-movdir64b -mno-movdiri -mno-mwaitx -mno-pconfig -mpku -mprfchw -mno-ptwrite -mno-rdpid -mrdrnd -mrdseed -mno-rtm -mno-serialize -mno-sgx -mno-sha -mno-shstk -mno-tbm -mno-tsxldtrk -mno-vaes -mno-waitpkg -mno-wbnoinvd -mxsave -mxsavec -mxsaveopt -mxsaves -mno-amx-tile -mno-amx-int8 -mno-amx-bf16 -mno-uintr -mno-hreset -mno-kl -mno-widekl -mno-avxvnni -mno-avx512fp16 -mno-avxifma -mno-avxvnniint8 -mno-avxneconvert -mno-cmpccxadd -mno-amx-fp16 -mno-prefetchi -mno-raoint -mno-amx-complex -mno-avxvnniint16 -mno-sm3 -mno-sha512 -mno-sm4 -mno-apxf -mno-usermsr -mno-avx10.2 -mno-amx-avx512 -mno-amx-tf32 -mno-amx-transpose -mno-amx-fp8 -mno-movrs -mno-amx-movrs --param=l1-cache-size=32 --param=l1-cache-line-size=64 --param=l2-cache-size=14080 -mtune=cascadelake -g -Ofast -std=c++14 -fno-omit-frame-pointer -fopenmp	kmeans-clang-O2: clang version 20.1.7	kmeans-clang-O3: clang version 20.1.7	kmeans-clang-O3-ffast-math: clang version 20.1.7	kmeans-icpx-O2: 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 -O2 -x Host -mtune=native -c -o main.o main.cpp -fveclib=SVML -faltmathlib=SVML -fheinous-gnu-extensions	kmeans-icpx-O3: 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 -O3 -x Host -mtune=native -c -o main.o main.cpp -fveclib=SVML -faltmathlib=SVML -fheinous-gnu-extensions	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
Number of processes observed	1	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0
Number of threads observed	10	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0
Frequency Driver	intel_pstate	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0
Frequency Governor	powersave	same as r0	same as r0	same as r0	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	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	same as r0	same as r0	same as r0
Number of sockets	1	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0
Number of cores per socket	10	same as r0	same as r0	same as r0	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	same as r0	same as r0	same as r0
MAQAO build	7076967d3502a2d74409cf402702d5c5c2847726::20250729-175200	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0
Comments	Intel Xeon 42104R (Cascade Lake CPU), 1-10 threads runs	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0	same as r0

Report Configuration

▶Compared Reports

Global Metrics

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 - Cascade Lake G++ O2

Run 2 - Cascade Lake G++ O3

Run 3 - Cascade Lake G++ Ofast

Run 4 - Cascade Lake Clang O2

Run 5 - Cascade Lake Clang O3

Run 6 - Cascade Lake Clang O3 + ffast-math

Run 7 - Cascade Lake ICPX O2

Run 8 - Cascade Lake ICPX O3

Run 9 - Cascade Lake ICPX Ofast

Experiment Summaries