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RidgeRun Developer Manual/Profiling Tools/Linux Perf: Difference between revisions
RidgeRun Developer Manual/Profiling Tools/Linux Perf (view source)
Revision as of 19:43, 2 November 2023
, 2 November 2023→Introduction to Linux Perf
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== Introduction to Linux Perf == | == Introduction to Linux Perf == | ||
Linux Perf is one of the most complete and accurate tools for profiling an application since it has access to kernel ABI/API. It can intercept calls and get access to the hardware counters. It is possible to determine: | |||
* Branching: how much does the branching affect the performance | |||
* Cache miss rates: how much the application has a good memory access pattern | |||
* Alignment faults: same as before but related to cache line trashing | |||
* Context switches: how much the application hides | |||
* CPU clocks and migration: how much time the application uses the CPU in active or waiting mode, and the migration amongst cores | |||
* Construct the call graph: description of how each function is called | |||
In this case, we cover the tool for application optimisation, where we want to optimise only specific parts. This is crucial for applications that are unknown and need to be accelerated. | |||
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