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OpenACC Tutorial - Profiling: Difference between revisions
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For the purpose of this tutorial, we use | For the purpose of this tutorial, we use several profilers as described below: | ||
* PGPROF - a powerful and simple analyzer for parallel programs written with OpenMP or OpenACC directives, or with CUDA | |||
We note that [http://www.pgroup.com/support/download_pgi2016.php?view=current Portland Group Profiler] is free for academic usage. | We note that [http://www.pgroup.com/support/download_pgi2016.php?view=current Portland Group Profiler] is free for academic usage. | ||
* NVIDIA Visual Profiler NVVP - a cross-platform analyzing tool for the codes written with OpenACC and CUDA C/C++ instructions | |||
* NVPROF - a command line text-based version of the NVIDIA Visual Profiler | |||
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=== PGPROF Profiller === | |||
[[File:Pgprof | [[File:Pgprof new0.png|thumbnail|300px|Starting new session|left ]] | ||
Bellow are several snapshots demonstrating how to start with the PGPROF profiler. First step is to initiate a new session. | Bellow are several snapshots demonstrating how to start with the PGPROF profiler. First step is to initiate a new session. | ||
Then browse for an executable file of the code you want to profile. | Then browse for an executable file of the code you want to profile. | ||
Then specify the profiling options. For example, if you need to profile CPU activity then set the "Profile execution of the CPU" box. | Then specify the profiling options. For example, if you need to profile CPU activity then set the "Profile execution of the CPU" box. | ||
== NVIDIA Visual Profiller == | === NVIDIA Visual Profiller === | ||
Another profiler available for OpenACC applications is NVIDIA Visual Profiler. It's a cross-platform analyzing tool for the codes written with OpenACC and CUDA C/C++ instructions. | Another profiler available for OpenACC applications is NVIDIA Visual Profiler. It's a cross-platform analyzing tool for the codes written with OpenACC and CUDA C/C++ instructions. | ||
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[[File:Nvvp-pic1.png|thumbnail|300px|Browse for executable you want to profile|right ]] | [[File:Nvvp-pic1.png|thumbnail|300px|Browse for executable you want to profile|right ]] | ||
== NVIDIA NVPROF Command Line Profiler == | === NVIDIA NVPROF Command Line Profiler === | ||
NVIDIA also provides a command line version called NVPROF, similar to GPU prof | NVIDIA also provides a command line version called NVPROF, similar to GPU prof | ||
{{Command | {{Command | ||