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<p class="MsoNormal">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.
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<p class="MsoNormal">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`.<o:p></o:p></p>
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<p class="MsoNormal">Hope that helps.<o:p></o:p></p>
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<p class="MsoNormal">-- <br>
Hui Zhou<o:p></o:p></p>
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<b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Yongyu Chen via discuss <discuss@mpich.org><br>
<b>Date: </b>Wednesday, March 17, 2021 at 2:39 PM<br>
<b>To: </b>discuss@mpich.org <discuss@mpich.org><br>
<b>Cc: </b>Yongyu Chen <yongyu.chen@mail.ru><br>
<b>Subject: </b>[mpich-discuss] A question about mutex timing<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in">Dear sir or madam,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">I enabled a feature on configuring the mpi library, which is --enable-mutex-timing (calculate the time spent waiting on mutexes).<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">But I don’t know how to use it.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Could you provide me with some ideas or solutions?<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Thank you for reading, I appreciate your replies!<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Sincerely,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Yongyu Chen<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Sincerely,<br>
Yongyu Chen<o:p></o:p></p>
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