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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) | 344.13 | 224.17 | 161.81 | 129.90 | 114.11 | 111.02 |
Max (Thread Active Time) (s) | 341.76 | 174.71 | 88.68 | 44.92 | 22.91 | 15.29 |
Average Active Time (s) | 341.76 | 174.51 | 88.54 | 44.84 | 22.84 | 15.17 |
Activity Ratio (%) | 99.3 | 77.9 | 54.7 | 34.5 | 20.0 | 13.7 |
Average number of active threads | 0.993 | 1.557 | 2.189 | 2.761 | 3.203 | 3.554 |
Affinity Stability (%) | 73.1 | 56.7 | 40.1 | 25.4 | 14.7 | 10.3 |
GFLOPS | 2.549 | 3.955 | 5.456 | 6.784 | 7.690 | 7.748 |
Time in analyzed loops (%) | 100.0 | 98.9 | 97.1 | 95.8 | 93.9 | 86.4 |
Time in analyzed innermost loops (%) | 97.7 | 96.7 | 94.9 | 93.6 | 91.7 | 84.5 |
Time in user code (%) | 100.0 | 98.9 | 97.1 | 95.8 | 93.9 | 86.4 |
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 | 1.17 |
Scalability - Gap | 1.00 | 1.30 | 1.88 | 3.02 | 5.31 | 8.39 |
No Scalar Integer | Potential Speedup | 1.25 | 1.25 | 1.24 | 1.24 | 1.23 | 1.20 |
Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 1 |
FP Vectorised | Potential Speedup | 2.51 | 2.47 | 2.40 | 2.35 | 2.28 | 2.04 |
Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 1 |
Fully Vectorised | Potential Speedup | 9.94 | 9.10 | 7.90 | 7.17 | 6.24 | 4.19 |
Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 1 |
Only FP Arithmetic | Potential Speedup | 1.32 | 1.31 | 1.31 | 1.30 | 1.29 | 1.26 |
Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 1 |
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. |
○ | -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. |
○ | -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. |
○ | -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. |
○ | -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. |
○ | -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. |
○ | -O2, -O3 or -Ofast is missing. |
○ | -march=(target) is missing. |
| r0 | r1 | r2 | r3 | r4 | r5 |
Experiment Name | K-Means scalability clang-O3 100000000 | K-Means scalability clang-O3 100000000 | K-Means scalability clang-O3 100000000 | K-Means scalability clang-O3 100000000 | K-Means scalability clang-O3 100000000 | K-Means scalability clang-O3 100000000 |
Application | ./kmeans/kmeans-clang-O3 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
Timestamp | 2025-07-16 19:07:14 | 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: 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 |