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DPROFPP !!!DPROFPP NAME SYNOPSIS DESCRIPTION OUTPUT OPTIONS ENVIRONMENT BUGS FILES SEE ALSO ---- !!NAME dprofpp - display perl profile data !!SYNOPSIS dprofpp [[__-a-z-l-v-U__] [[__-s-r-u__] [[__-q__] [[__-F__] [[__-I-E__] [[__-O cnt__] [[__-A__] [[__-R__] [[__-S__] [[__-g subroutine__] [[profile] dprofpp __-T__ [[__-F__] [[__-g subroutine__] [[profile] dprofpp __-t__ [[__-F__] [[__-g subroutine__] [[profile] dprofpp __-p script__ [[__-Q__] [[other opts] dprofpp __-V__ [[profile] !!DESCRIPTION The ''dprofpp'' command interprets profile data produced by a profiler, such as the Devel::DProf profiler. Dprofpp will read the file ''tmon.out'' and will display the 15 subroutines which are using the most time. By default the times for each subroutine are given exclusive of the times of their child subroutines. To profile a Perl script run the perl interpreter with the __-d__ switch. So to profile script ''test.pl'' with Devel::DProf the following command should be used. $ perl5 -d:DProf test.pl Then run dprofpp to analyze the profile. The output of dprofpp depends on the flags to the program and the version of Perl you're using. $ dprofpp -u Total Elapsed Time = 1.67 Seconds User Time = 0.61 Seconds Exclusive Times %Time Seconds #Calls sec/call Name 52.4 0.320 2 0.1600 main::foo 45.9 0.280 200 0.0014 main::bar 0.00 0.000 1 0.0000 !DynaLoader::import 0.00 0.000 1 0.0000 main::baz The dprofpp tool can also run the profiler before analyzing the profile data. The above two commands can be executed with one dprofpp command. $ dprofpp -u -p test.pl Consult `` PROFILE FORMAT '' in Devel::DProf for a description of the raw profile. !!OUTPUT Columns are: %Time Percentage of time spent in this routine. #Calls Number of calls to this routine. sec/call Average number of seconds per call to this routine. Name Name of routine. CumulS Time (in seconds) spent in this routine and routines called from it. !ExclSec Time (in seconds) spent in this routine (not including those called from it). Csec/c Average time (in seconds) spent in each call of this routine (including those called from it). !!OPTIONS __-a__ Sort alphabetically by subroutine names. __-A__ Count timing for autoloaded subroutine as timing for *::AUTOLOAD. Otherwise the time to autoload it is counted as time of the subroutine itself (there is no way to separate autoload time from run time). This is going to be irrelevant with newer Perls. They will inform Devel::DProf ''when'' the AUTOLOAD switches to actual subroutine, so a separate statistics for AUTOLOAD will be collected no matter whether this option is set. __-R__ Count anonymous subroutines defined in the same package separately. __-E__ (default) Display all subroutine times exclusive of child subroutine times. __-F__ Force the generation of fake exit timestamps if dprofpp reports that the profile is garbled. This is only useful if dprofpp determines that the profile is garbled due to missing exit timestamps. You're on your own if you do this. Consult the BUGS section. __-I__ Display all subroutine times inclusive of child subroutine times. __-l__ Sort by number of calls to the subroutines. This may help identify candidates for inlining. __-O cnt__ Show only ''cnt'' subroutines. The default is 15. __-p script__ Tells dprofpp that it should profile the given script and then interpret its profile data. See __-Q__. __-Q__ Used with __-p__ to tell dprofpp to quit after profiling the script, without interpreting the data. __-q__ Do not display column headers. __-r__ Display elapsed real times rather than user+system times. __-s__ Display system times rather than user+system times. __-T__ Display subroutine call tree to stdout. Subroutine statistics are not displayed. __-t__ Display subroutine call tree to stdout. Subroutine statistics are not displayed. When a function is called multiple consecutive times at the same calling level then it is displayed once with a repeat count. __-S__ Display ''merged'' subroutine call tree to stdout. Statistics is displayed for each branch of the tree. When a function is called multiple (''not necessarily consecutive'') times in the same branch then all these calls go into one branch of the next level. A repeat count is output together with combined inclusive, exclusive and kids time. Branches are sorted w.r.t. inclusive time. __-U__ Do not sort. Display in the order found in the raw profile. __-u__ Display user times rather than user+system times. __-V__ Print dprofpp's version number and exit. If a raw profile is found then its XS_VERSION variable will be displayed, too. __-v__ Sort by average time spent in subroutines during each call. This may help identify candidates for inlining. __-z__ (default) Sort by amount of user+system time used. The first few lines should show you which subroutines are using the most time. __-g__ subroutine Ignore subroutines except subroutine and whatever is called from it. !!ENVIRONMENT The environment variable __DPROFPP_OPTS__ can be set to a string containing options for dprofpp. You might use this if you prefer __-I__ over __-E__ or if you want __-F__ on all the time. This was added fairly lazily, so there are some undesirable side effects. Options on the commandline should override options in DPROFPP_OPTS--but don't count on that in this version. !!BUGS Applications which call ''_exit()'' or ''exec()'' from within a subroutine will leave an incomplete profile. See the __-F__ option. Any bugs in Devel::DProf, or any profiler generating the profile data, could be visible here. See `` BUGS '' in Devel::DProf. Mail bug reports and feature requests to the perl5-porters mailing list at ''''. Bug reports should include the output of the __-V__ option. !!FILES dprofpp - profile processor tmon.out - raw profile !!SEE ALSO perl, Devel::DProf, times(2) ----
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