I figured out the solution to the missing line by line profiling. We preload our modules in a startup script. If I skip the preload when running Devel::NYTProf, line by line profiling appears. I'm curious if someone knows why. I'm using apache with prefork MPM so I imagine the issue is fork related.
Thanks, Paul On Friday, August 19, 2011 4:56:43 AM UTC-4, Tim.Bunce wrote: > > On Wed, Aug 17, 2011 at 01:49:51PM -0700, Brian Brandes wrote: > > > > To give some background, I'm trying to benchmark a perl web > > application running on Apache, Perl 5.8.9. Naturally, I'm using the > > Devel::NYTProf::Apache package for this. In the simplest of setups, > > when I only put "PerlModule Devel::NYTProf::Apache" in httpd.conf. I > > then run httdperf to slam my webserver, and I see plenty of files that > > match the default format of /tmp/nytprof.$parent.out.$$. This is fine > > and dandy, since each of my apache processes spawns many workers, but > > the problem I'm running into is that when I run nytperfhtml on any of > > these, I'm experiencing a couple problems, one the line by line > > profiling isn't working out, numerous lines are skipped and the > > statement count is very off. > > I don't know what that would be. > > > And secondly, I'm unable to see any of > > the files that are being run via perl -e. > > > In an attempt to solve the above problem, I wanted to try out using > > the settings optimize=0:use_db_sub=1. So, I added "PerlSetEnv NYTPROF > > optimize=0:use_db_sub=1" to httpd.conf. I restart apache, slam my > > webserver, but now, despite not supplying any output file location, > > the files now are output to my current working directory (not /tmp/). > > The docs say: > > If the NYTPROF environment variable isn't set at the time > Devel::NYTProf::Apache is loaded then Devel::NYTProf::Apache will issue > a warning and default it to: > > file=/tmp/nytprof.$$.out > > (The docs ought to mention that the addpid an endatexit options are also > enabled, but directly, not via the NYTPROF environment variable.) > > So you want to use > > file=/tmp/nytprof.$$.out:optimize=0:use_db_sub=1 > > > Furthermore, they no longer have their worker process IDs. > > Try > > file=/tmp/nytprof.$$.out:optimize=0:use_db_sub=1:addpid=1 > > > Essentially what I'm trying to figure out is if there a way to specify > > the worker process id within the file portion of the NYTPROF > > environment variable. I was hoping specifying the file such as > > "PerlSetEnv NYTPROF optimize=0:use_db_sub=1:file=/nytprof/nytprof. > > $parent.out.$$" would work, but that only literally places the dollar > > signs in the file name. > > You could just use PerlPassEnv NYTPROF and set the NYTPROF env var > yourself before starting apache. > > > So, if anyone knows how to solve the specifying the worker ID problem, > > I'd most appreciate it. If you have another solution for getting the > > nytperfhtml report generation to include the perl -e files (outside of > > upgrading perl, though I may wind up doing that), I'd much appreciate > > it. > > See > http://search.cpan.org/~timb/Devel-NYTProf-4.06/lib/Devel/NYTProf.pm#PROFILING > specifically the PERL5OPT env var. Maybe best to set it within the > apache worker process so as not to interfere with the parent. > > Tim. > > -- You've received this message because you are subscribed to the Devel::NYTProf Development User group. Group hosted at: http://groups.google.com/group/develnytprof-dev Project hosted at: http://perl-devel-nytprof.googlecode.com CPAN distribution: http://search.cpan.org/dist/Devel-NYTProf To post, email: [email protected] To unsubscribe, email: [email protected]
