> I'm curious why [Abseil's] mutex implementation is absent from the author's be...

vitus · 2024-10-02T22:05:41 1727906741

> Possibly because it's C++ (as opposed to C)?

MSVC 2022's std::mutex is listed, though. (That said, GCC's / clang's std::mutex is not listed for Linux or macOS.)

absl::Mutex does come with some microbenchmarks with a handful of points of comparison (std::mutex, absl::base_internal::SpinLock) which might be useful to get an approximate baseline.

https://github.com/abseil/abseil-cpp/blob/master/absl/synchr...

kccqzy · 2024-10-03T00:06:33 1727913993

std::mutex is rarely used. In libc++ for example it was just pthread_mutex_t. So it's not different from just benchmarking pthread.

I was talking about the wait() and notify_one() member functions for std::atomic. See https://en.cppreference.com/w/cpp/atomic/atomic/wait and https://en.cppreference.com/w/cpp/atomic/atomic/notify_one