Developed in the University of Tennessee.Provides a standard API for accessing PMCs available on most modern microprocessors.Recently added support for extracting GPU counters as well.Provides command-line tools and an API to obtain PMCs for both Intel and AMD processors on the Linux OS.Likwid is an abbreviation for Like I know what I’m Doing.PMCs on an Intel processor may not be available for an ARM processor or a GPU. So, the collection of all PMCs for application execution on a platform is a. 3 or 4 PMCs can be collected in one application run. They can not be collected all together because of a limited number of registers dedicated to storing them.For example, a typical Intel Haswell CPU has 164 PMCs whereas Intel Skylake processors have 385 PMCs. The following are some of the significant properties of PMCs. PMCs have been developed primarily to aid low-level performance analysis and tuning. as well as micro-architectural events originating from the processor and its performance monitoring unit called the hardware events such as cache misses, branch instructions, etc. They include software events, which are pure kernel-level counters such as page faults, context switches, etc. Performance events or performance monitoring counters (PMCs) are special-purpose registers provided in modern microprocessors to store the counts of software and hardware activities. Furthermore, we explore the standard tools to collect utilization metrics for the execution of applications in Linux. In this post, I explain the standard tools to collect performance monitoring tools in modern computing platforms. Perseverance is stubbornness with a purpose – Josh Shipp My dear reader, how are you? السلام عليكم
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