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- r0: run_1_thread
- r1: run_2_threads
- r2: run_4_threads - option thread_filter-threshold (1%) discards 3 threads, cumulating 0.06 seconds CPU time.
- r3: run_8_threads - option thread_filter-threshold (1%) discards 5 threads, cumulating 0.19 seconds CPU time.
- r4: run_16_threads - option thread_filter-threshold (1%) discards 10 threads, cumulating 0.43 seconds CPU time.
- r5: run_32_threads - option thread_filter-threshold (1%) discards 9 threads, cumulating 0.47 seconds CPU time.
- r6: run_48_threads - option thread_filter-threshold (1%) discards 12 threads, cumulating 0.62 seconds CPU time.
- r7: run_64_threads - option thread_filter-threshold (1%) discards 2 threads, cumulating 0.18 seconds CPU time.
| Metric | r0 | r1 | r2 | r3 | r4 | r5 | r6 | r7 |
|---|
| Total Time (s) | 153.88 | 82.64 | 45.51 | 27.92 | 18.47 | 13.82 | 12.22 | 11.77 |
| Max (Thread Active Time) (s) | 8.95 | 8.96 | 8.95 | 8.96 | 8.99 | 9.00 | 9.02 | 9.06 |
| Average Active Time (s) | 8.95 | 8.96 | 8.95 | 8.96 | 1.87 | 0.57 | 0.45 | 0.62 |
| Activity Ratio (%) | 5.82 | 10.8 | 19.7 | 32.1 | 10.1 | 4.10 | 3.69 | 5.26 |
| Average number of active threads | 58.2 E-3 | 0.108 | 0.197 | 0.321 | 0.507 | 0.861 | 1.291 | 3.207 |
| Affinity Stability (%) | 96.0 | 96.2 | 96.6 | 97.1 | 19.5 | 59.7 | 81.3 | 92.7 |
| GFLOPS | 32.5 E-3 | 60.7 E-3 | 0.118 | 0.221 | 0.527 | 1.735 | 3.792 | 13.878 |
| Time in analyzed loops (%) | 99.9 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |
| Time in analyzed innermost loops (%) | 99.9 | 100.0 | 99.9 | 100.0 | 100.0 | 99.4 | 99.2 | 98.8 |
| Time in user code (%) | 99.9 | 100 | 100 | 100 | 100 | 100.0 | 100 | 100.0 |
| Compilation Options Score (%) | 62.5 | 62.5 | 62.5 | 62.5 | 62.5 | 62.5 | 62.5 | 62.5 |
| Array Access Efficiency (%) | 25.2 | 25.2 | 25.6 | 26.8 | 31.7 | 45.7 | 59.0 | 82.1 |
|
| Potential Speedups | |
| Perfect Flow Complexity | 1.00 | 1.00 | 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 | 1.00 | 1.00 | 1.00 | 1.00 |
| Perfect OpenMP/MPI/Pthread/TBB + Perfect Load Distribution | 1.00 | 1.00 | 1.00 | 1.00 | 4.80 | 15.9 | 20.0 | 14.7 |
| Scalability - Gap | 1.00 | 0.54 | 0.30 | 0.18 | 0.60 | 1.89 | 2.78 | 4.67 |
| No Scalar Integer | Potential Speedup | 1.70 | 1.70 | 1.70 | 1.69 | 1.66 | 1.59 | 1.53 | 1.43 |
| Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 |
| FP Vectorised | Potential Speedup | 1.13 | 1.13 | 1.13 | 1.14 | 1.15 | 1.19 | 1.23 | 1.30 |
| Nb Loops to get 80% | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 1 |
| Fully Vectorised | Potential Speedup | 4.38 | 4.39 | 4.38 | 4.38 | 4.35 | 4.20 | 4.10 | 3.94 |
| Nb Loops to get 80% | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 |
| Only FP Arithmetic | Potential Speedup | 2.82 | 2.83 | 2.81 | 2.76 | 2.59 | 2.18 | 1.90 | 1.56 |
| Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 |
| Source Object | Issue |
|---|
| ▼kmeans-gcc-Ofast– | |
| ▼main.cpp– | |
| ○ | -O3 or -Ofast is missing. |
| ○ | -funroll-loops is missing. |
| Source Object | Issue |
|---|
| ▼kmeans-gcc-Ofast– | |
| ▼main.cpp– | |
| ○ | -O3 or -Ofast is missing. |
| ○ | -funroll-loops is missing. |
| Source Object | Issue |
|---|
| ▼kmeans-gcc-Ofast– | |
| ▼main.cpp– | |
| ○ | -O3 or -Ofast is missing. |
| ○ | -funroll-loops is missing. |
| Source Object | Issue |
|---|
| ▼kmeans-gcc-Ofast– | |
| ▼main.cpp– | |
| ○ | -O3 or -Ofast is missing. |
| ○ | -funroll-loops is missing. |
| Source Object | Issue |
|---|
| ▼kmeans-gcc-Ofast– | |
| ▼main.cpp– | |
| ○ | -O3 or -Ofast is missing. |
| ○ | -funroll-loops is missing. |
| Source Object | Issue |
|---|
| ▼kmeans-gcc-Ofast– | |
| ▼main.cpp– | |
| ○ | -O3 or -Ofast is missing. |
| ○ | -funroll-loops is missing. |
| Source Object | Issue |
|---|
| ▼kmeans-gcc-Ofast– | |
| ▼main.cpp– | |
| ○ | -O3 or -Ofast is missing. |
| ○ | -funroll-loops is missing. |
| Source Object | Issue |
|---|
| ▼kmeans-gcc-Ofast– | |
| ▼main.cpp– | |
| ○ | -O3 or -Ofast is missing. |
| ○ | -funroll-loops is missing. |
| r0 | r1 | r2 | r3 | r4 | r5 | r6 | r7 |
|---|
| Experiment Name | K-Means scalability gcc-Ofast 100000000 | K-Means scalability gcc-Ofast 100000000 | K-Means scalability gcc-Ofast 100000000 | K-Means scalability gcc-Ofast 100000000 | K-Means scalability gcc-Ofast 100000000 | K-Means scalability gcc-Ofast 100000000 | K-Means scalability gcc-Ofast 100000000 | K-Means scalability gcc-Ofast 100000000 |
|---|
| Application | ./kmeans/kmeans-gcc-Ofast | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
|---|
| Timestamp | 2025-07-10 12:15:01 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
|---|
| Experiment Type | Sequential | same as r0 | same as r0 | same as r0 | OpenMP; | same as r4 | same as r4 | same as r4 |
|---|
| Machine | ip-172-31-18-66 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
|---|
| Architecture | aarch64 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
|---|
| Micro Architecture | ARM_NEOVERSE_V1 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
|---|
| Model Name | | | | | | | | |
|---|
| Cache Size | | | | | | | | |
|---|
| Number of Cores | | | | | | | | |
|---|
| Maximal Frequency | 0 GHz | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
|---|
| OS Version | Linux 6.8.0-1031-aws #33-Ubuntu SMP Fri Jun 20 17:58:11 UTC 2025 | 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 | aarch64 | 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 | ARM_NEOVERSE_V1 | 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-Ofast: GNU C++14 14.2.0 -mlittle-endian -mabi=lp64 -mcpu=neoverse-v1+sm4+crc+aes+sha3 -g -Ofast -std=c++14 -fno-omit-frame-pointer -fopenmp GNU C17 14.2.0 -mlittle-endian -mabi=lp64 -g -g -g -O2 -O2 -O2 -fbuilding-libgcc -fno-stack-protector -fPIC | same as r0 | same as r0 | 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 | same as r0 | same as r0 |
|---|
| Number of threads observed | 1 | same as r0 | same as r0 | same as r0 | 5 | 21 | 35 | 61 |
|---|
| Frequency Driver | NA | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
|---|
| Frequency Governor | NA | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
|---|
| Huge Pages | madvise | 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 |
|---|
| 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 |
|---|
| Number of cores per socket | 64 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
|---|
| MAQAO version | 2025.1.1 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
|---|
| MAQAO build | f763b230967252184a5e61875ae92196728ac8f6::20250710-120157 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
|---|
| Comments | AWS Graviton 3 (Neoverse V1) CPU, 1-64 threads runs | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
|---|
