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94 lines
2.8 KiB
Markdown
94 lines
2.8 KiB
Markdown
\[ **Stefano Pigozzi** + **Caterina Gazzotti** + **Fabio Zanichelli** | Topic OpenMP | High Performance Computing Laboratory | Unimore \]
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# C code optimization using NVIDIA CUDA
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> ### Assignment #2
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>
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> Every team is called to optimize (parallellize) the execution time of the assigned applications on multi-processor system.
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>
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> #### Expected outcomes
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>
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> * Repository of the code (github/gitlab is ok, or .zip )
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> * Oral presentation (5 min + 5 min Q&A) of your work
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>
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> #### Assigned application
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>
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> Group 3: `OpenMP/linear-algebra/kernels/atax`
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## Results
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```console
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steffo@nitro:/s/D/W/S/u/atax[130]$ make bench
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./.bench.sh
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Flags: -DMINI_DATASET
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CB*** Average of 3 runs: 3.33e-06 seconds
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Flags: -DMINI_DATASET -DHPC_INCLUDE_INIT
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CB*** Average of 3 runs: 8.33e-06 seconds
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Flags: -DMINI_DATASET -DHPC_USE_CUDA
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CB*** Average of 3 runs: 6.8e-05 seconds
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Flags: -DMINI_DATASET -DHPC_INCLUDE_INIT -DHPC_USE_CUDA
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CB*** Average of 3 runs: 7.2e-05 seconds
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Flags: -DSMALL_DATASET
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CB*** Average of 3 runs: 0.000563 seconds
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Flags: -DSMALL_DATASET -DHPC_INCLUDE_INIT
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CB*** Average of 3 runs: 0.00139 seconds
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Flags: -DSMALL_DATASET -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.000229 seconds
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Flags: -DSMALL_DATASET -DHPC_INCLUDE_INIT -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.000309 seconds
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Flags: -DSTANDARD_DATASET
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CB*** Average of 3 runs: 0.0276 seconds
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Flags: -DSTANDARD_DATASET -DHPC_INCLUDE_INIT
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CB*** Average of 3 runs: 0.0664 seconds
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Flags: -DSTANDARD_DATASET -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.00938 seconds
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Flags: -DSTANDARD_DATASET -DHPC_INCLUDE_INIT -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.0128 seconds
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Flags: -DLARGE_DATASET
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CB*** Average of 3 runs: 0.109 seconds
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Flags: -DLARGE_DATASET -DHPC_INCLUDE_INIT
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CB*** Average of 3 runs: 0.243 seconds
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Flags: -DLARGE_DATASET -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.0449 seconds
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Flags: -DLARGE_DATASET -DHPC_INCLUDE_INIT -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.0459 seconds
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Flags: -DEXTRALARGE_DATASET
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CB*** Average of 3 runs: 0.248 seconds
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Flags: -DEXTRALARGE_DATASET -DHPC_INCLUDE_INIT
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CB*** Average of 3 runs: 0.584 seconds
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Flags: -DEXTRALARGE_DATASET -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.0971 seconds
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Flags: -DEXTRALARGE_DATASET -DHPC_INCLUDE_INIT -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.108 seconds
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```
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### Validation
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* Compiler used: **nvcc**
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* Device used: `NVIDIA GTX 1070` with `525.60.11` driver
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To reproduce the obtained results:
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1. Clone the repository on @Steffo99's computer:
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```console
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$ git clone https://github.com/Steffo99/unimore-hpc-assignments
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```
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2. Checkout the exact commit the tests were executed on:
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```console
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$ git checkout 2d6448e5aa3707370b837a37db4eb880ca06ddb7
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```
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3. Access our group's assigned folder:
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```console
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$ cd unimore-hpc-assignments/atax
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```
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4. Run the benchmarking script:
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```console
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$ make bench
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```
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