Unfortunately, `--enable-mutex-timing` is a leftover option that now does nothing. One option is to enable logging – following this guide https://wiki.mpich.org/mpich/index.php/Debug_Event_Logging . If you set `MPICH_DBG_CLASS=THREAD`, you should see in the log file entries like “enter/exit MPIDU_Thread_mutex_lock xxx”, with timestamps.

If that is insufficient for you, you may have manually insert your own timing harness. The file you should modify is `src/mpid/common/thread/mpidu_thread_fallback.h`.

Hope that helps.

-- 
Hui Zhou

From: Yongyu Chen via discuss <discuss@mpich.org>
Date: Wednesday, March 17, 2021 at 2:39 PM
To: discuss@mpich.org <discuss@mpich.org>
Cc: Yongyu Chen <yongyu.chen@mail.ru>
Subject: [mpich-discuss] A question about mutex timing

Dear sir or madam,

I enabled a feature on configuring the mpi library, which is --enable-mutex-timing (calculate the time spent waiting on mutexes).

But I don’t know how to use it.

Could you provide me with some ideas or solutions?

Thank you for reading, I appreciate your replies!

Sincerely,

Yongyu Chen

Sincerely,
Yongyu Chen