I was using the worker MPM, and this was the culprit. Changed to prefork MPM, and suddenly my tmon.out files have some content.

Thanks a bunch for the suggestion!

In reply to Re^2: Apache::DProf works under mod_perl, but only show one method called (APR::Pool) by robins
in thread Apache::DProf works under mod_perl, but only show one method called (APR::Pool) by robins

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