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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 |