Detect the number of cores on windows

The parallel package now has a function to detect the number of cores: parallel:::detectCores().

This thread has a number of suggestions, including:

Sys.getenv('NUMBER_OF_PROCESSORS')

Note also the posting in that thread by Prof. Ripley which talks to the difficulties of doing this.

windows r multicore

If you actually need to distinguish between actual cores, chips, and logical processors, the API to call is GetLogicalProcessInformation

GetSystemInfo if just want to know how many logical processors on a machine (with no differentiation for hyperthreading.).

How you call this from "R" is beyond me. But I'd guess R has a facility for invoking code from native Windows DLLs.

CodeHunter