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- r0: run_1_thread
- r1: run_2_threads
- r2: run_4_threads
- r3: run_8_threads
- r4: run_16_threads
- r5: run_26_threads
| Metric | r0 | r1 | r2 | r3 | r4 | r5 |
|---|
| Total Time (s) | 338.79 | 220.12 | 162.41 | 129.01 | 115.88 | 107.81 |
| Max (Thread Active Time) (s) | 336.34 | 170.65 | 87.22 | 43.94 | 22.54 | 14.71 |
| Average Active Time (s) | 336.34 | 170.44 | 87.09 | 43.85 | 22.48 | 14.62 |
| Activity Ratio (%) | 99.3 | 77.4 | 53.6 | 34.0 | 19.4 | 13.6 |
| Average number of active threads | 0.993 | 1.549 | 2.145 | 2.719 | 3.103 | 3.526 |
| Affinity Stability (%) | 71.6 | 55.9 | 38.6 | 24.8 | 14.1 | 10.2 |
| GFLOPS | 2.640 | 4.070 | 5.539 | 6.886 | 7.685 | 8.012 |
| Time in analyzed loops (%) | 100.0 | 98.8 | 97.1 | 95.3 | 93.6 | 87.0 |
| Time in analyzed innermost loops (%) | 97.7 | 96.6 | 94.9 | 93.1 | 91.4 | 85.1 |
| Time in user code (%) | 100.0 | 98.8 | 97.1 | 95.3 | 93.6 | 87.0 |
| Compilation Options Score (%) | 16.7 | 16.7 | 16.7 | 16.7 | 16.7 | 16.7 |
| Array Access Efficiency (%) | 99.6 | 99.6 | 99.6 | 99.6 | 99.6 | 99.6 |
|
| 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 | 1.01 | 1.02 |
| Perfect OpenMP/MPI/Pthread/TBB + Perfect Load Distribution | 1.00 | 1.01 | 1.03 | 1.05 | 1.07 | 1.16 |
| Scalability - Gap | 1.00 | 1.30 | 1.92 | 3.05 | 5.47 | 8.27 |
| No Scalar Integer | Potential Speedup | 1.25 | 1.25 | 1.24 | 1.24 | 1.23 | 1.21 |
| Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 1 |
| FP Vectorised | Potential Speedup | 2.51 | 2.47 | 2.40 | 2.34 | 2.27 | 2.05 |
| Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 1 |
| Fully Vectorised | Potential Speedup | 7.77 | 7.18 | 6.49 | 5.86 | 5.27 | 3.88 |
| Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 1 |
| Only FP Arithmetic | Potential Speedup | 1.64 | 1.63 | 1.61 | 1.59 | 1.57 | 1.50 |
| Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 1 |
| 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-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-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-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-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-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. |
| r0 | r1 | r2 | r3 | r4 | r5 |
| Experiment Name | K-Means scalability clang-O3-ffast-math 100000000 | K-Means scalability clang-O3-ffast-math 100000000 | K-Means scalability clang-O3-ffast-math 100000000 | K-Means scalability clang-O3-ffast-math 100000000 | K-Means scalability clang-O3-ffast-math 100000000 | K-Means scalability clang-O3-ffast-math 100000000 |
| Application | ./kmeans/kmeans-clang-O3-ffast-math | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
| Timestamp | 2025-07-16 19:44:54 | 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-clang-O3-ffast-math: clang version 20.1.7 | 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 | 2025.1.1 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
| MAQAO build | 933a186bb86a5daa8e86c3880bb3791669fb7baf::20250716-135632 | 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 |