std::thread::hardware_concurrency
static unsigned int hardware_concurrency() noexcept; |
(since C++11) | |
Returns the number of concurrent threads supported by the implementation. The value should be considered only a hint.
Parameters
(none)
Return value
Number of concurrent threads supported. If the value is not well defined or not computable, returns 0.
Example
Run this code
#include <iostream> #include <thread> int main() { unsigned int n = std::thread::hardware_concurrency(); std::cout << n << " concurrent threads are supported.\n"; }
Possible output:
4 concurrent threads are supported.
See also
min offset to avoid false sharing max offset to promote true sharing (constant) |