multithreading - Context switches of thread (C++ windows) -

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• how programmatically count context switches? 2 answers

how can know "context switches" count c++, if know handle of thread?

http://i.stack.imgur.com/myda2.jpg

1. by querying perofrmance counters named thread(<process-name>/<thread-number>)/context switches/sec using 1 of apis, e.g. accessing performance data in c++. more on this: how programmatically count context switches?

2. using windows internal ntquerysysteminformation api, see obtaining number of thread context switches programmatically details/code snippet.

talking process explorer in particular, guess it's taking data ntquerysysteminformation.