Analyze Threading Performance with Intel® VTune™ Profiler | Intel Software
5This video demonstrates how to use Intel VTune Profiler to configure a threading analysis to analyze locks and waits. The hands-on example we use consists of an application creating over 30 threads writing to a mutex protected file. As a result there are a large number of threads competing for mutex ownership and generating disk I/O. VTune Profiler allows you to understand, analyze and resolve these kinds of threading issues.
Intel VTune Profiler performs threading analysis to analyze locks and waits. It is aided by Intel Instrumentation and Tracing Technologies APIs to identify what code blocks the threads are executing when examining the timeline. VTune Profiler can pinpoint exactly which thread is waiting on which synchronization object and for how long. Drilling down further we see where synchronization object contention occurred during execution. Synchronization object examples include semaphores, mutexes, and I/O waits. We also see the source file and line number where transitions occur.
Zooming in on the associated timeline, we then identify where the task begin and task end were called for each thread so we better understand what that thread was executing during this portion of the timeline.
This level of detailed understanding of the thread timing in an application and the role locks, waits and mutexes play in orchestrating best possible synchronization between threads then allows us to consider performance improvement strategies.
Intel® VTune™ Profiler: https://www.intel.com/content/www/us/en/developer/tools/oneapi/vtune-profiler.html
Intel Distribution for Python*: https://www.intel.com/content/www/us/en/developer/tools/oneapi/distribution-for-python.html
Intel® oneAPI: https://www.intel.com/content/www/us/en/developer/tools/oneapi/overview.html
oneAPI Code Samples Library: https://www.intel.com/content/www/us/en/developer/tools/oneapi/code-samples.html
oneAPI Code Samples Catalog: https://oneapi-src.github.io/oneAPI-samples/
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Analyze Threading Performance with Intel® VTune™ Profiler | Intel Software