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129 | .\" ======================================================================== | |
130 | .\" | |
131 | .IX Title "DPROFPP 1" | |
132 | .TH DPROFPP 1 "2007-06-19" "perl v5.8.8" "Perl Programmers Reference Guide" | |
133 | .SH "NAME" | |
134 | dprofpp \- display perl profile data | |
135 | .SH "SYNOPSIS" | |
136 | .IX Header "SYNOPSIS" | |
137 | dprofpp [\fB\-a\fR|\fB\-z\fR|\fB\-l\fR|\fB\-v\fR|\fB\-U\fR] [\fB\-d\fR] [\fB\-s\fR|\fB\-r\fR|\fB\-u\fR] [\fB\-q\fR] [\fB\-F\fR] [\fB\-I|\-E\fR] [\fB\-O cnt\fR] [\fB\-A\fR] [\fB\-R\fR] [\fB\-S\fR] [\fB\-g subroutine\fR] [\fB\-G\fR <regexp> [\fB\-P\fR]] [\fB\-f\fR <regexp>] [profile] | |
138 | .PP | |
139 | dprofpp \fB\-T\fR [\fB\-F\fR] [\fB\-g subroutine\fR] [profile] | |
140 | .PP | |
141 | dprofpp \fB\-t\fR [\fB\-F\fR] [\fB\-g subroutine\fR] [profile] | |
142 | .PP | |
143 | dprofpp \fB\-G\fR <regexp> [\fB\-P\fR] [profile] | |
144 | .PP | |
145 | dprofpp \fB\-p script\fR [\fB\-Q\fR] [other opts] | |
146 | .PP | |
147 | dprofpp \fB\-V\fR [profile] | |
148 | .SH "DESCRIPTION" | |
149 | .IX Header "DESCRIPTION" | |
150 | The \fIdprofpp\fR command interprets profile data produced by a profiler, such | |
151 | as the Devel::DProf profiler. Dprofpp will read the file \fItmon.out\fR and | |
152 | display the 15 subroutines which are using the most time. By default | |
153 | the times for each subroutine are given exclusive of the times of their | |
154 | child subroutines. | |
155 | .PP | |
156 | To profile a Perl script run the perl interpreter with the \fB\-d\fR switch. So | |
157 | to profile script \fItest.pl\fR with Devel::DProf use the following: | |
158 | .PP | |
159 | .Vb 1 | |
160 | \& $ perl5 -d:DProf test.pl | |
161 | .Ve | |
162 | .PP | |
163 | Then run dprofpp to analyze the profile. The output of dprofpp depends | |
164 | on the flags to the program and the version of Perl you're using. | |
165 | .PP | |
166 | .Vb 9 | |
167 | \& $ dprofpp -u | |
168 | \& Total Elapsed Time = 1.67 Seconds | |
169 | \& User Time = 0.61 Seconds | |
170 | \& Exclusive Times | |
171 | \& %Time Seconds #Calls sec/call Name | |
172 | \& 52.4 0.320 2 0.1600 main::foo | |
173 | \& 45.9 0.280 200 0.0014 main::bar | |
174 | \& 0.00 0.000 1 0.0000 DynaLoader::import | |
175 | \& 0.00 0.000 1 0.0000 main::baz | |
176 | .Ve | |
177 | .PP | |
178 | The dprofpp tool can also run the profiler before analyzing the profile | |
179 | data. The above two commands can be executed with one dprofpp command. | |
180 | .PP | |
181 | .Vb 1 | |
182 | \& $ dprofpp -u -p test.pl | |
183 | .Ve | |
184 | .PP | |
185 | Consult \*(L"\s-1PROFILE\s0 \s-1FORMAT\s0\*(R" in Devel::DProf for a description of the raw profile. | |
186 | .SH "OUTPUT" | |
187 | .IX Header "OUTPUT" | |
188 | Columns are: | |
189 | .IP "%Time" 4 | |
190 | .IX Item "%Time" | |
191 | Percentage of time spent in this routine. | |
192 | .IP "#Calls" 4 | |
193 | .IX Item "#Calls" | |
194 | Number of calls to this routine. | |
195 | .IP "sec/call" 4 | |
196 | .IX Item "sec/call" | |
197 | Average number of seconds per call to this routine. | |
198 | .IP "Name" 4 | |
199 | .IX Item "Name" | |
200 | Name of routine. | |
201 | .IP "CumulS" 4 | |
202 | .IX Item "CumulS" | |
203 | Time (in seconds) spent in this routine and routines called from it. | |
204 | .IP "ExclSec" 4 | |
205 | .IX Item "ExclSec" | |
206 | Time (in seconds) spent in this routine (not including those called | |
207 | from it). | |
208 | .IP "Csec/c" 4 | |
209 | .IX Item "Csec/c" | |
210 | Average time (in seconds) spent in each call of this routine | |
211 | (including those called from it). | |
212 | .SH "OPTIONS" | |
213 | .IX Header "OPTIONS" | |
214 | .IP "\fB\-a\fR" 5 | |
215 | .IX Item "-a" | |
216 | Sort alphabetically by subroutine names. | |
217 | .IP "\fB\-d\fR" 5 | |
218 | .IX Item "-d" | |
219 | Reverse whatever sort is used | |
220 | .IP "\fB\-A\fR" 5 | |
221 | .IX Item "-A" | |
222 | Count timing for autoloaded subroutine as timing for \f(CW*::AUTOLOAD\fR. | |
223 | Otherwise the time to autoload it is counted as time of the subroutine | |
224 | itself (there is no way to separate autoload time from run time). | |
225 | .Sp | |
226 | This is going to be irrelevant with newer Perls. They will inform | |
227 | \&\f(CW\*(C`Devel::DProf\*(C'\fR \fIwhen\fR the \f(CW\*(C`AUTOLOAD\*(C'\fR switches to actual subroutine, | |
228 | so a separate statistics for \f(CW\*(C`AUTOLOAD\*(C'\fR will be collected no matter | |
229 | whether this option is set. | |
230 | .IP "\fB\-R\fR" 5 | |
231 | .IX Item "-R" | |
232 | Count anonymous subroutines defined in the same package separately. | |
233 | .IP "\fB\-E\fR" 5 | |
234 | .IX Item "-E" | |
235 | (default) Display all subroutine times exclusive of child subroutine times. | |
236 | .IP "\fB\-F\fR" 5 | |
237 | .IX Item "-F" | |
238 | Force the generation of fake exit timestamps if dprofpp reports that the | |
239 | profile is garbled. This is only useful if dprofpp determines that the | |
240 | profile is garbled due to missing exit timestamps. You're on your own if | |
241 | you do this. Consult the \s-1BUGS\s0 section. | |
242 | .IP "\fB\-I\fR" 5 | |
243 | .IX Item "-I" | |
244 | Display all subroutine times inclusive of child subroutine times. | |
245 | .IP "\fB\-l\fR" 5 | |
246 | .IX Item "-l" | |
247 | Sort by number of calls to the subroutines. This may help identify | |
248 | candidates for inlining. | |
249 | .IP "\fB\-O cnt\fR" 5 | |
250 | .IX Item "-O cnt" | |
251 | Show only \fIcnt\fR subroutines. The default is 15. | |
252 | .IP "\fB\-p script\fR" 5 | |
253 | .IX Item "-p script" | |
254 | Tells dprofpp that it should profile the given script and then interpret its | |
255 | profile data. See \fB\-Q\fR. | |
256 | .IP "\fB\-Q\fR" 5 | |
257 | .IX Item "-Q" | |
258 | Used with \fB\-p\fR to tell dprofpp to quit after profiling the script, without | |
259 | interpreting the data. | |
260 | .IP "\fB\-q\fR" 5 | |
261 | .IX Item "-q" | |
262 | Do not display column headers. | |
263 | .IP "\fB\-r\fR" 5 | |
264 | .IX Item "-r" | |
265 | Display elapsed real times rather than user+system times. | |
266 | .IP "\fB\-s\fR" 5 | |
267 | .IX Item "-s" | |
268 | Display system times rather than user+system times. | |
269 | .IP "\fB\-T\fR" 5 | |
270 | .IX Item "-T" | |
271 | Display subroutine call tree to stdout. Subroutine statistics are | |
272 | not displayed. | |
273 | .IP "\fB\-t\fR" 5 | |
274 | .IX Item "-t" | |
275 | Display subroutine call tree to stdout. Subroutine statistics are not | |
276 | displayed. When a function is called multiple consecutive times at the same | |
277 | calling level then it is displayed once with a repeat count. | |
278 | .IP "\fB\-S\fR" 5 | |
279 | .IX Item "-S" | |
280 | Display \fImerged\fR subroutine call tree to stdout. Statistics are | |
281 | displayed for each branch of the tree. | |
282 | .Sp | |
283 | When a function is called multiple (\fInot necessarily consecutive\fR) | |
284 | times in the same branch then all these calls go into one branch of | |
285 | the next level. A repeat count is output together with combined | |
286 | inclusive, exclusive and kids time. | |
287 | .Sp | |
288 | Branches are sorted with regard to inclusive time. | |
289 | .IP "\fB\-U\fR" 5 | |
290 | .IX Item "-U" | |
291 | Do not sort. Display in the order found in the raw profile. | |
292 | .IP "\fB\-u\fR" 5 | |
293 | .IX Item "-u" | |
294 | Display user times rather than user+system times. | |
295 | .IP "\fB\-V\fR" 5 | |
296 | .IX Item "-V" | |
297 | Print dprofpp's version number and exit. If a raw profile is found then its | |
298 | \&\s-1XS_VERSION\s0 variable will be displayed, too. | |
299 | .IP "\fB\-v\fR" 5 | |
300 | .IX Item "-v" | |
301 | Sort by average time spent in subroutines during each call. This may help | |
302 | identify candidates for inlining. | |
303 | .IP "\fB\-z\fR" 5 | |
304 | .IX Item "-z" | |
305 | (default) Sort by amount of user+system time used. The first few lines | |
306 | should show you which subroutines are using the most time. | |
307 | .ie n .IP "\fB\-g\fR ""subroutine""" 5 | |
308 | .el .IP "\fB\-g\fR \f(CWsubroutine\fR" 5 | |
309 | .IX Item "-g subroutine" | |
310 | Ignore subroutines except \f(CW\*(C`subroutine\*(C'\fR and whatever is called from it. | |
311 | .IP "\fB\-G\fR <regexp>" 5 | |
312 | .IX Item "-G <regexp>" | |
313 | Aggregate \*(L"Group\*(R" all calls matching the pattern together. | |
314 | For example this can be used to group all calls of a set of packages | |
315 | .Sp | |
316 | .Vb 1 | |
317 | \& -G "(package1::)|(package2::)|(package3::)" | |
318 | .Ve | |
319 | .Sp | |
320 | or to group subroutines by name: | |
321 | .Sp | |
322 | .Vb 1 | |
323 | \& -G "getNum" | |
324 | .Ve | |
325 | .IP "\fB\-P\fR" 5 | |
326 | .IX Item "-P" | |
327 | Used with \-G to aggregate \*(L"Pull\*(R" together all calls that did not match \-G. | |
328 | .IP "\fB\-f\fR <regexp>" 5 | |
329 | .IX Item "-f <regexp>" | |
330 | Filter all calls matching the pattern. | |
331 | .IP "\fB\-h\fR" 5 | |
332 | .IX Item "-h" | |
333 | Display brief help and exit. | |
334 | .IP "\fB\-H\fR" 5 | |
335 | .IX Item "-H" | |
336 | Display long help and exit. | |
337 | .SH "ENVIRONMENT" | |
338 | .IX Header "ENVIRONMENT" | |
339 | The environment variable \fB\s-1DPROFPP_OPTS\s0\fR can be set to a string containing | |
340 | options for dprofpp. You might use this if you prefer \fB\-I\fR over \fB\-E\fR or | |
341 | if you want \fB\-F\fR on all the time. | |
342 | .PP | |
343 | This was added fairly lazily, so there are some undesirable side effects. | |
344 | Options on the commandline should override options in DPROFPP_OPTS\-\-but | |
345 | don't count on that in this version. | |
346 | .SH "BUGS" | |
347 | .IX Header "BUGS" | |
348 | Applications which call \fI_exit()\fR or \fIexec()\fR from within a subroutine | |
349 | will leave an incomplete profile. See the \fB\-F\fR option. | |
350 | .PP | |
351 | Any bugs in Devel::DProf, or any profiler generating the profile data, could | |
352 | be visible here. See \*(L"\s-1BUGS\s0\*(R" in Devel::DProf. | |
353 | .PP | |
354 | Mail bug reports and feature requests to the perl5\-porters mailing list at | |
355 | \&\fI<perl5\-porters@perl.org>\fR. Bug reports should include the | |
356 | output of the \fB\-V\fR option. | |
357 | .SH "FILES" | |
358 | .IX Header "FILES" | |
359 | .Vb 2 | |
360 | \& dprofpp - profile processor | |
361 | \& tmon.out - raw profile | |
362 | .Ve | |
363 | .SH "SEE ALSO" | |
364 | .IX Header "SEE ALSO" | |
365 | perl, Devel::DProf, \fItimes\fR\|(2) |