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The following are examples of pl_flow.d.
This is a simple script to trace the flow of Perl subroutines (functions).
Here it traces the example program, Code/Perl/func_abc.pl.
# pl_flow.d
C TIME(us) FILE -- SUB
0 2979519183757 func_abc.pl -> func_a
0 2979520190159 func_abc.pl -> func_b
0 2979521200166 func_abc.pl -> func_c
0 2979522210184 func_abc.pl <- func_c
0 2979522210199 func_abc.pl <- func_b
0 2979522210207 func_abc.pl <- func_a
^C
As each subroutine is entered, the third column is indented by 2 spaces. This
shows which subroutine is calling who - the output abovebegins by showing that
func_a() began, and then called func_b().
If the output looks shuffled, check the CPU "C" and "TIME" columns, and
post sort based on TIME if necessary.
See Notes/ALLflow_notes.txt for important notes about reading flow outputs.
The following traces a Perl network interface statistics tool, "nicstat"
version 0.99,
# pl_flow.d
C TIME(us) FILE -- SUB
0 4181899422549 nicstat -> BEGIN
0 4181899423048 strict.pm -> bits
0 4181899423081 strict.pm <- bits
0 4181899423105 strict.pm -> import
0 4181899423126 strict.pm <- import
0 4181899423133 nicstat <- BEGIN
0 4181899423157 nicstat -> BEGIN
0 4181899445634 Exporter.pm -> import
0 4181899445730 Exporter.pm <- import
0 4181899445743 nicstat <- BEGIN
0 4181899445770 nicstat -> BEGIN
0 4181899446066 Kstat.pm -> BEGIN
0 4181899446076 strict.pm -> import
0 4181899446087 strict.pm <- import
0 4181899446094 Kstat.pm <- BEGIN
0 4181899446116 Kstat.pm -> BEGIN
0 4181899453669 DynaLoader.pm -> BEGIN
0 4181899453810 vars.pm -> BEGIN
0 4181899453821 vars.pm <- BEGIN
0 4181899453921 vars.pm -> BEGIN
0 4181899454494 warnings.pm -> BEGIN
0 4181899455149 warnings.pm <- BEGIN
0 4181899457183 register.pm -> import
0 4181899457202 register.pm -> mkMask
0 4181899457214 register.pm <- mkMask
0 4181899457264 register.pm -> mkMask
0 4181899457274 register.pm <- mkMask
0 4181899457283 register.pm <- import
0 4181899457290 vars.pm <- BEGIN
0 4181899457316 vars.pm -> BEGIN
0 4181899457324 strict.pm -> import
0 4181899457332 strict.pm -> bits
0 4181899457345 strict.pm <- bits
0 4181899457353 strict.pm <- import
0 4181899457359 vars.pm <- BEGIN
0 4181899457652 vars.pm -> import
0 4181899457703 vars.pm <- import
0 4181899457710 DynaLoader.pm <- BEGIN
0 4181899457758 DynaLoader.pm -> BEGIN
0 4181899457883 Config.pm -> BEGIN
0 4181899457890 strict.pm -> import
0 4181899457899 strict.pm <- import
0 4181899457906 Config.pm <- BEGIN
0 4181899458038 Config.pm -> BEGIN
0 4181899458045 strict.pm -> unimport
0 4181899458053 strict.pm -> bits
0 4181899458063 strict.pm <- bits
0 4181899458077 strict.pm <- unimport
0 4181899458084 Config.pm <- BEGIN
0 4181899458426 Config.pm -> TIEHASH
0 4181899458435 Config.pm <- TIEHASH
0 4181899458476 Config.pm -> import
0 4181899458493 Config.pm <- import
0 4181899458500 DynaLoader.pm <- BEGIN
0 4181899459978 AutoLoader.pm -> BEGIN
0 4181899459990 strict.pm -> import
0 4181899460033 strict.pm <- import
0 4181899460064 AutoLoader.pm <- BEGIN
0 4181899460088 AutoLoader.pm -> BEGIN
0 4181899460096 AutoLoader.pm <- BEGIN
0 4181899460187 AutoLoader.pm -> BEGIN
0 4181899460199 AutoLoader.pm <- BEGIN
0 4181899460582 AutoLoader.pm -> BEGIN
0 4181899460590 strict.pm -> unimport
0 4181899460598 strict.pm -> bits
0 4181899460611 strict.pm <- bits
0 4181899460619 strict.pm <- unimport
0 4181899460625 AutoLoader.pm <- BEGIN
0 4181899460830 AutoLoader.pm -> BEGIN
0 4181899460838 strict.pm -> unimport
0 4181899460845 strict.pm -> bits
0 4181899460855 strict.pm <- bits
0 4181899460862 strict.pm <- unimport
0 4181899460869 AutoLoader.pm <- BEGIN
0 4181899461092 AutoLoader.pm -> BEGIN
0 4181899461100 strict.pm -> unimport
0 4181899461107 strict.pm -> bits
0 4181899461116 strict.pm <- bits
0 4181899461124 strict.pm <- unimport
0 4181899461130 AutoLoader.pm <- BEGIN
0 4181899461238 Config.pm -> FETCH
0 4181899461250 Config.pm <- FETCH
0 4181899461264 Config.pm -> FETCH
0 4181899461272 Config.pm <- FETCH
0 4181899461282 Config.pm -> FETCH
0 4181899461290 Config.pm <- FETCH
0 4181899461299 Config.pm -> FETCH
0 4181899461307 Config.pm <- FETCH
0 4181899461403 Kstat.pm <- BEGIN
0 4181899461432 Kstat.pm -> BEGIN
0 4181899461440 vars.pm -> import
0 4181899461476 vars.pm <- import
0 4181899461483 Kstat.pm <- BEGIN
0 4181899461539 DynaLoader.pm -> bootstrap
0 4181899461769 DynaLoader.pm -> dl_load_flags
0 4181899461777 DynaLoader.pm <- dl_load_flags
0 4181899462208 DynaLoader.pm <- bootstrap
0 4181899462231 nicstat <- BEGIN
0 4181899468306 Std.pm -> getopts
0 4181899468351 Exporter.pm -> import
0 4181899468390 Exporter.pm <- import
0 4181899468405 Std.pm <- getopts
0 4181899468426 nicstat -> find_nets
0 4181899521011 nicstat <- find_nets
0 4181899521415 nicstat -> fetch_net_data
0 4181899564973 nicstat <- fetch_net_data
0 4181899565526 nicstat -> print_neat
0 4181899565672 nicstat <- print_neat
0 4181899565680 nicstat -> print_neat
0 4181899565902 nicstat <- print_neat
0 4181899565909 nicstat -> print_neat
0 4181899566033 nicstat <- print_neat
0 4181899566039 nicstat -> print_neat
0 4181899566165 nicstat <- print_neat
0 4181899566172 nicstat -> print_neat
0 4181899566331 nicstat <- print_neat
0 4181899566338 nicstat -> print_neat
0 4181899566494 nicstat <- print_neat
0 4181899566791 nicstat -> print_neat
0 4181899566953 nicstat <- print_neat
0 4181899566961 nicstat -> print_neat
0 4181899567085 nicstat <- print_neat
0 4181899567091 nicstat -> print_neat
0 4181899567247 nicstat <- print_neat
0 4181899567254 nicstat -> print_neat
0 4181899567377 nicstat <- print_neat
0 4181899567383 nicstat -> print_neat
0 4181899567538 nicstat <- print_neat
0 4181899567544 nicstat -> print_neat
0 4181899567666 nicstat <- print_neat
0 4181899567977 nicstat -> print_neat
0 4181899568232 nicstat <- print_neat
0 4181899568240 nicstat -> print_neat
0 4181899568397 nicstat <- print_neat
0 4181899568404 nicstat -> print_neat
0 4181899568528 nicstat <- print_neat
0 4181899568535 nicstat -> print_neat
0 4181899568656 nicstat <- print_neat
0 4181899568663 nicstat -> print_neat
0 4181899568819 nicstat <- print_neat
0 4181899568826 nicstat -> print_neat
0 4181899568947 nicstat <- print_neat
0 4181899572708 Config.pm -> DESTROY
0 4181899572735 Config.pm <- DESTROY
After initialising Perl libraries and modules, the "nicstat" program ran,
the output matching what was expected from the source.
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