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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_32_threads
- r6: run_64_threads
- r7: run_96_threads
Metric | r0 | r1 | r2 | r3 | r4 | r5 | r6 | r7 |
---|
Total Time (s) | 107.35 | 54.13 | 27.49 | 14.09 | 7.12 | 3.69 | 1.92 | 2.04 |
Max (Thread Active Time) (s) | 99.82 | 49.96 | 25.32 | 13.00 | 6.56 | 3.30 | 1.47 | 0.80 |
Average Active Time (s) | 99.82 | 49.95 | 25.03 | 12.63 | 6.34 | 3.20 | 1.35 | 0.69 |
Activity Ratio (%) | 93.0 | 92.3 | 91.1 | 89.7 | 89.2 | 87.0 | 70.8 | 34.1 |
Average number of active threads | 0.930 | 1.845 | 3.642 | 7.172 | 14.260 | 27.792 | 45.092 | 32.499 |
Affinity Stability (%) | 99.7 | 99.7 | 99.5 | 99.4 | 99.2 | 98.8 | 97.8 | 96.4 |
GFLOPS | 4.314 | 8.562 | 16.920 | 33.388 | 66.576 | 129.536 | 212.494 | 154.053 |
Time in analyzed loops (%) | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 99.9 | 99.6 | 99.1 |
Time in analyzed innermost loops (%) | 99.1 | 99.1 | 99.0 | 99.1 | 99.2 | 99.0 | 98.7 | 98.2 |
Time in user code (%) | 100 | 100 | 100.0 | 100.0 | 100.0 | 99.9 | 99.6 | 99.1 |
Compilation Options Score (%) | 62.5 | 62.5 | 62.5 | 62.5 | 62.5 | 62.5 | 62.5 | 62.5 |
Array Access Efficiency (%) | 99.6 | 99.5 | 99.5 | 99.5 | 99.6 | 99.5 | 99.5 | 99.5 |
|
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 | 1.01 | 1.01 |
Perfect OpenMP/MPI/Pthread/TBB + Perfect Load Distribution | 1.00 | 1.00 | 1.01 | 1.03 | 1.04 | 1.03 | 1.09 | 1.17 |
Scalability - Gap | 1.00 | 1.01 | 1.02 | 1.05 | 1.06 | 1.10 | 1.14 | 1.82 |
No Scalar Integer | Potential Speedup | 1.37 | 1.37 | 1.37 | 1.37 | 1.37 | 1.36 | 1.33 | 1.33 |
Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
FP Vectorised | Potential Speedup | 1.37 | 1.37 | 1.37 | 1.37 | 1.37 | 1.36 | 1.33 | 1.33 |
Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Fully Vectorised | Potential Speedup | 1.31 | 1.31 | 1.31 | 1.31 | 1.31 | 1.30 | 1.28 | 1.28 |
Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Only FP Arithmetic | Potential Speedup | 1.37 | 1.37 | 1.37 | 1.37 | 1.37 | 1.36 | 1.33 | 1.33 |
Nb Loops to get 80% | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
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 | 2025-07-17 11:01:26 | same as r0 | same as r0 | 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 | same as r1 | same as r1 |
Machine | ip-172-31-47-249.ec2.internal | 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_V2 | 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 6.1.109-118.189.amzn2023.aarch64 #1 SMP Tue Sep 10 08:58:40 UTC 2024 | 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_V2 | 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-v2+crc+sve2-aes+sve2-sha3+nossbs -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 | 2 | 4 | 8 | 16 | 32 | 64 | 96 |
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 | 96 | 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 | 2302fb4b01f3b07cccb215042f4e5c7e9fcc3718::20250717-122749 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |
Comments | AWS Graviton 4 (Neoverse V2) CPU, 1-96 threads runs | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 | same as r0 |