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- r0: G++ O3 + Funroll
- r1: Clang++ O3 + Ffastmath
- r2: ICPX O3 + More Aggressive Flags
| Metric | r0 | r1 | r2 |
|---|
| Total Time (s) | 16.80 | 18.11 | 16.54 |
| Max (Thread Active Time) (s) | 16.73 | 18.01 | 16.44 |
| Average Active Time (s) | 6.79 | 11.88 | 10.31 |
| Activity Ratio (%) | 40.5 | 65.7 | 62.5 |
| Average number of active threads | 10.509 | 17.054 | 16.204 |
| Affinity Stability (%) | 97.5 | 98.6 | 98.4 |
| GFLOPS | 37.485 | 34.763 | 38.071 |
| Time in analyzed loops (%) | 92.2 | 61.3 | 55.3 |
| Time in analyzed innermost loops (%) | 86.5 | 59.7 | 54.8 |
| Time in user code (%) | 92.2 | 61.3 | 55.3 |
| Compilation Options Score (%) | 100 | 16.7 | 100 |
| Array Access Efficiency (%) | 40.0 | 96.0 | 40.0 |
|
| Potential Speedups | |
| Perfect Flow Complexity | 3.37 | 1.00 | 1.72 |
| Perfect OpenMP + MPI + Pthread | 1.00 | 1.00 | 1.00 |
| Perfect OpenMP + MPI + Pthread + Perfect Load Distribution | 2.67 | 2.47 | 2.88 |
| No Scalar Integer | Potential Speedup | 1.03 | 1.14 | 1.05 |
| Nb Loops to get 80% | 2 | 1 | 1 |
| FP Vectorised | Potential Speedup | 2.06 | 1.53 | 1.37 |
| Nb Loops to get 80% | 1 | 1 | 1 |
| Fully Vectorised | Potential Speedup | 5.27 | 2.15 | 1.86 |
| Nb Loops to get 80% | 3 | 1 | 1 |
| Only FP Arithmetic | Potential Speedup | 1.29 | 1.33 | 1.22 |
| Nb Loops to get 80% | 2 | 1 | 2 |
| Source Object | Issue |
|---|
| ▼kmeans-gcc-O3-funroll– | |
| ▼main.cpp– | |
| ○ | |
| 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. |
| ○ | -O2, -O3 or -Ofast is missing. |
| ○ | -march=(target) is missing. |
| Source Object | Issue |
|---|
| ▼kmeans-icpx-O3-aggressive– | |
| ▼main.cpp– | |
| ○ | |
| r0 | r1 | r2 |
|---|
| Experiment Name | K-Means scalability gcc-O3-funroll 100000000 | K-Means scalability clang-O3-ffast-math 100000000 | K-Means scalability icpx-O3-aggressive 100000000 |
|---|
| Application | ./kmeans/kmeans-gcc-O3-funroll | ./kmeans/kmeans-clang-O3-ffast-math | ./kmeans/kmeans-icpx-O3-aggressive |
|---|
| Timestamp | 2025-06-19 15:13:21 | 2025-06-27 16:30:13 | 2025-06-23 16:14:50 |
|---|
| Experiment Type | OpenMP; | same as r0 | same as r0 |
|---|
| Machine | skylake | same as r0 | same as r0 |
|---|
| Architecture | x86_64 | same as r0 | same as r0 |
|---|
| Micro Architecture | SKYLAKE | same as r0 | same as r0 |
|---|
| Model Name | Intel(R) Xeon(R) Platinum 8170 CPU @ 2.10GHz | same as r0 | same as r0 |
|---|
| Cache Size | 36608 KB | same as r0 | same as r0 |
|---|
| Number of Cores | 26 | same as r0 | same as r0 |
|---|
| Maximal Frequency | 2.1 GHz | same as r0 | same as r0 |
|---|
| OS Version | Linux 6.10.10-arch1-1 #1 SMP PREEMPT_DYNAMIC Thu, 12 Sep 2024 17:21:02 +0000 | same as r0 | same as r0 |
|---|
| Architecture used during static analysis | x86_64 | same as r0 | same as r0 |
|---|
| Micro Architecture used during static analysis | SKYLAKE | same as r0 | same as r0 |
|---|
| Compilation Options |
kmeans-gcc-O3-funroll: GNU C++14 14.2.1 20240910 -march=skylake-avx512 -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 -mno-avx512vnni -mno-avx512bitalg -mno-avx512bf16 -mno-avx512vp2intersect -mno-3dnow -madx -mabm -mno-cldemote -mclflushopt -mclwb -mno-clzero -mcx16 -mno-enqcmd -mf16c -mfsgsbase -mfxsr -mhle -msahf -mno-lwp -mlzcnt -mmovbe -mno-movdir64b -mno-movdiri -mno-mwaitx -mno-pconfig -mpku -mprfchw -mno-ptwrite -mno-rdpid -mrdrnd -mrdseed -mrtm -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 --param=l1-cache-size=32 --param=l1-cache-line-size=64 --param=l2-cache-size=36608 -mtune=skylake-avx512 -g -O3 -std=c++14 -fno-omit-frame-pointer -fopenmp -funroll-loops | kmeans-clang-O3-ffast-math: clang version 20.1.6 | kmeans-icpx-O3-aggressive: clang based Intel(R) oneAPI DPC++/C++ Compiler 2024.2.1 (2024.2.1.20240711) --driver-mode=g++ --intel -I . -MMD -MP -march=native -std=c++14 -g -fno-omit-frame-pointer -fiopenmp -O3 -x Host -funroll-loops -ffast-math -qopt-report=5 -c -o main.o main.cpp -fveclib=SVML -faltmathlib=SVML -fheinous-gnu-extensions |
|---|
| Number of processes observed | 1 | same as r0 | same as r0 |
|---|
| Number of threads observed | 26 | same as r0 | same as r0 |
|---|
| Frequency Driver | intel_cpufreq | same as r0 | same as r0 |
|---|
| Frequency Governor | performance | same as r0 | same as r0 |
|---|
| Huge Pages | always | same as r0 | same as r0 |
|---|
| Hyperthreading | off | same as r0 | same as r0 |
|---|
| Number of sockets | 2 | same as r0 | same as r0 |
|---|
| Number of cores per socket | 26 | same as r0 | same as r0 |
|---|
| MAQAO version | 2025.1.0 | same as r0 | same as r0 |
|---|
| MAQAO build | e913a471001afb562449956a906221b5bfa8ea0d::20250617-163738 | same as r0 | same as r0 |
|---|
| Comments | Intel Xeon Platinum 8170 (Skylake CPU), 1-26 threads runs | same as r0 | same as r0 |
|---|
