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sys_num_cpus - System Number of CPUs

Source: R/utils_system.R
sys_num_cpus.Rd

Get the number of CPU cores available on the current machine using gdalraster::get_num_cpus(), which calls the internal GDAL C++ library function GDALGetCPUs().

Usage

sys_num_cpus()

Value

Integer representing the number of CPU cores available to the R session.

Details

This method is more robust than parallel::detectCores() because it accounts for CPU affinity, container limits, and other environmental restrictions that may cap the processing pools actually available to the R session.

However, on a standard unconstrained desktop machine, it will return the same value as parallel::detectCores(logical = TRUE) because both report the total logical processing channels.

  • Number of CPUs (GDAL): gdalraster::get_num_cpus() queries the C++ backend to see how many logical execution slots (hardware threads) are exposed by the operating system.

  • Number of Cores (parallel): parallel::detectCores(logical = TRUE) targets the virtual threads generated by Hyper-Threading (Intel) or SMT (AMD). Conversely, running parallel::detectCores(logical = FALSE) attempts to return only the count of independent physical cores on the processor.

Examples

if (FALSE) { # \dontrun{
sys_num_cpus()
} # }