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103 lines
2.9 KiB
Markdown
103 lines
2.9 KiB
Markdown
\[ **Stefano Pigozzi** + **Caterina Gazzotti** + **Fabio Zanichelli** | Topic CUDA | High Performance Computing Laboratory | Unimore \]
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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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```
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Flags: -DMINI_DATASET
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CB*** Average of 3 runs: 1.03e-05 seconds
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Flags: -DMINI_DATASET -DHPC_INCLUDE_INIT
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CB*** Average of 3 runs: 1.27e-05 seconds
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Flags: -DMINI_DATASET -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.00123 seconds
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Flags: -DMINI_DATASET -DHPC_INCLUDE_INIT -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.00161 seconds
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Flags: -DSMALL_DATASET
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CB*** Average of 3 runs: 0.0014 seconds
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Flags: -DSMALL_DATASET -DHPC_INCLUDE_INIT
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CB*** Average of 3 runs: 0.00344 seconds
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Flags: -DSMALL_DATASET -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.00971 seconds
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Flags: -DSMALL_DATASET -DHPC_INCLUDE_INIT -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.0112 seconds
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Flags: -DSTANDARD_DATASET
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CB*** Average of 3 runs: 0.0876 seconds
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Flags: -DSTANDARD_DATASET -DHPC_INCLUDE_INIT
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CB*** Average of 3 runs: 0.188 seconds
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Flags: -DSTANDARD_DATASET -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.201 seconds
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Flags: -DSTANDARD_DATASET -DHPC_INCLUDE_INIT -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.0647 seconds
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Flags: -DLARGE_DATASET
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CB*** Average of 3 runs: 0.35 seconds
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Flags: -DLARGE_DATASET -DHPC_INCLUDE_INIT
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CB*** Average of 3 runs: 0.746 seconds
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Flags: -DLARGE_DATASET -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.26 seconds
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Flags: -DLARGE_DATASET -DHPC_INCLUDE_INIT -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.278 seconds
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Flags: -DEXTRALARGE_DATASET
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CB*** Average of 3 runs: 0.789 seconds
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Flags: -DEXTRALARGE_DATASET -DHPC_INCLUDE_INIT
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CB*** Average of 3 runs: 1.68 seconds
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Flags: -DEXTRALARGE_DATASET -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.647 seconds
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Flags: -DEXTRALARGE_DATASET -DHPC_INCLUDE_INIT -DHPC_USE_CUDA
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CB*** Average of 3 runs: 0.665 seconds
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```
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### Validation
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> Compiler used: **nvcc**
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> ```
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> Built on Mon_Mar_11_22:13:24_CDT_2019
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> Cuda compilation tools, release 10.0, V10.0.326
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> ```
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>
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> Device used: **Unimore Jetson Nano #8**
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To reproduce the obtained results:
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1. Load the CUDA module:
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```console
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$ module load cuda
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```
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2. 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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3. Checkout the exact commit the tests were executed on:
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```console
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$ git checkout d13a9b786a53d5195ae17ef7afa776e2600ce8e0
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```
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4. 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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5. Run the benchmarking script:
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```console
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$ make bench
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```
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