Profiling multi-threaded applications

SamplingProfiler has a few options to help profile a multi-threaded application which I’ll go over here.

In the current version, those options allow identifying CPU-related bottlenecks, as in “threads taking too much CPU resources or execution time”. However, they do not provide much clues yet to pinpoint bottlenecks arising from thread synchronization issues or serialization (insufficient parallelism). Hopefully, more support for profiling multi-threaded applications will come in future versions.

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SamplingProfiler v1.7.2

SamplingProfiler v1.7.2 has now been released.

This version includes the following changes:

  • added an option to display line numbers in the source preview
  • extended the process CPU affinity options to allow individually selecting up to 16 cores

The UI has been slightly rearrange to accomodate the CPU affinity options (I guess I’ll need to find something prettier for those upcoming 256 core CPUs…). There may be other indirect minor changes.

Printable versions of the articles

There is something about WordPress that reminds me of Delphi, not the language or the IDE, but the spirit. On the one hand, its a convenient and comfortable environment out of the box, to which ready-made functionality can be easily added, and on the other hand everything under the hood is still accessible and tweakable without having to fork in a major way (like Delphi, unlike most of the rest of them).

Anyway, I’ve added support for printable versions of the articles here, thanks to Lester Chan’s WP-Print, a wee bit of CSS & php tweaking is all it took. Hopefully the dead-tree lovers that asked for it should be satisfied, as well as those few that manually tried to append a “/print” to the url 😉