| setThreadOptions {RcppParallel} | R Documentation |
Set thread options (number of threads to use for task scheduling and stack size per-thread) for RcppParallel.
setThreadOptions(numThreads = "auto", stackSize = "auto") defaultNumThreads()
numThreads |
Number of threads to use for task scheduling. Call 'defaultNumThreads()' to determine the the default value used for "auto". |
stackSize |
Stack size (in bytes) to use for worker threads. The default used for "auto" is 2MB on 32-bit systems and 4MB on 64-bit systems (note that this parameter has no effect on Windows). |
RcppParallel is automatically initialized with the default number of threads and thread stack size when it loads. You can call 'setThreadOptions()' at any time to change the defaults.
The 'parallelFor()' and 'parallelReduce()' also accept 'numThreads' as an argument, if you'd like to control the number of threads specifically to be made available for a particular parallel function call. Note that this value is advisory, and TBB may choose a smaller number of threads if the number of requested threads cannot be honored on the system.
'defaultNumThreads()' returns the default number of threads used by RcppParallel, if another value isn't specified either via 'setThreadOptions()' or explicitly in calls to 'parallelFor()' and 'parallelReduce()'.
## Not run: library(RcppParallel) setThreadOptions(numThreads = 4) defaultNumThreads() ## End(Not run)