ref: b502a62da2ec6058923db94f87ecc2d29db2fa77
dir: /man/1/cprof/
.TH CPROF 1 .SH NAME cprof \- coverage profiling of limbo programs .SH SYNOPSIS .B cprof [ .B -nfer ] [ .BI -m " modname" ] ... [ .I "cmd arg ..." ] .PP .B wm/cprof [ .B -efr ] [ .BI -m " modname" ] ... [ .I "cmd arg ..." ] .SH DESCRIPTION .I Cprof is a coverage profiling tool which shows whether lines of limbo source have been executed or not. It can also show the number of times a line of code has been executed and can accumulate results over a series of runs if so desired. The source in question should be compiled with the .B -g flag so that the relevant symbol table files exist. .PP The .B -n option lists the name of the file along with the line number. .PP The .B -f option shows the number of times source code is executed rather than simply indicating coverage. .PP The .B -r options indicates that the profiling results should be recorded. Any profiled dis file of the form <name>.dis will have the raw profiling results stored in a file named <name>.prf. If this file already existed before the run, the results will be added to this file. The profiling results are not shown when this option is given. .PP The .B -m option lists the module names which are to be profiled. If none are given, all the modules loaded by the kernel will be profiled. The name may be the actual name of the module or its path name. .PP The .B -e option profiles the module that is loaded first in any following command. In this case there is no need to give a .B -m option as this is added automatically. .PP Any remaining arguments are assumed to specify a command and set of arguments to the command. If this is the case, .B cprof will automatically start profiling, run the command to completion and then stop profiling before either recording the results or showing the profile statistics. .PP If no command is given to profile, then .B cprof will show the profile statistics from any existing recorded results in .prf files instead. .PP .B Cprof discriminates between different sections of code on the same line. A limbo for statement, for example, consisting of initialization, condition and step all on the same line of source code will be dealt with as three separate sections. .PP .B Cprof displays the profile statistics as a list of the limbo source preceded by a line number and an indication of whether the line was executed or not. For each section of code on each line, a plus sign indicates that it was executed, a minus sign that it was not and a question mark indicates that some of the dis instructions associated with the section of code were executed but some were not. Lines with no associated dis code do not have an indication. Of course, given the .B -f option, the number of times each section is executed is shown instead. .PP .I Wm/cprof is a graphical coverage profiling tool which shows which lines of limbo source have not been executed. It can accumulate results over a series of runs if so desired. .PP The .B -r options indicates that the profiling results should be recorded. Any profiled dis file of the form <name>.dis will have the raw profiling results stored in a file named <name>.prf. If this file already existed before the run, the results will be added to this file. .PP The .B -m option lists the module names which are to be profiled. If none are given, all the modules loaded by the kernel will be profiled. The name may be the actual name of the module or its path name. .PP The .B -e option profiles the module that is loaded first in any following command. In this case there is no need to give a .B -m option as this is added automatically. .PP The .B -f option allows a view of the execution profile rather than coverage profile. Each source line is preceded by the number of times it was executed and the text is coloured according to this: the darker the colour the more times the section of code was executed. .PP Any remaining arguments are assumed to specify a command and set of arguments to the command. If this is the case, .B wm/cprof will automatically start profiling, run the command to completion and then stop profiling before optionally recording the results and showing the profile statistics. .PP If no command is given to profile, then .B wm/cprof will show the profile statistics from any existing recorded results in .prf files instead. .PP .B Wm/cprof displays the profile statistics graphically. When the .B -f option is not present, code that has not been executed is shown in white against a red background. Code whose corresponding dis instructions have not been wholly executed are shown in red against a white background. Typically a line of code such as .EX x = !x; .EE might show only partial execution if x has changed value from 1 to 0 but not vice-verse. .PP The top of the text window names the module along with any modules before and after it in the list. If a module has 100% coverage this is stated as well. To help find unexecuted code, use the find icon in the menu bar. To move to the next or go back to any other profiled modules, use the arrow icons in the menu bar. The last icon, the reload icon, pops up a menu of profiled modules to choose from. .PP .B wm/cprof calls .I cprof to do the actual work. .SH EXAMPLE To profile a particular command .IP .EX cprof /dis/math/sieve 100 .EE .PP To profile the same command but restrict attention to its own module (Sieve). .IP .EX cprof -m Sieve /dis/math/sieve 100 .EE .PP A shorter version of the above: .IP .EX cprof -e /dis/math/sieve 100 .EE .PP Make 3 runs recording results as we go: .IP .EX cprof -e -r /dis/math/sieve 100 cprof -e -r /dis/math/sieve 1000 cprof -e -r /dis/math/sieve 10000 .EE .PP Now look at the cumulative results: .IP .EX cprof -m /dis/math/sieve.dis .EE .PP To profile a particular command: .IP .EX wm/cprof /dis/math/sieve 100 .EE .PP To profile the same command but restrict attention to its own module (Partitions). .IP .EX wm/cprof -m Sieve /dis/math/sieve 100 .EE .PP A shorter version of the above: .IP .EX wm/cprof -e /dis/math/sieve 100 .EE .PP Make 3 runs recording results as we go using cprof for simplicity: .IP .EX cprof -e -r /dis/math/sieve 100 cprof -e -r /dis/math/sieve 1000 cprof -e -r /dis/math/sieve 10000 .EE .PP Now look at the cumulative results graphically: .IP .EX wm/cprof -m /dis/math/sieve.dis .EE .SH SOURCE .B /appl/cmd/cprof.b .br .B /appl/wm/cprof.b .SH SEE ALSO .IR mprof (1), .IR prof (1), .IR prof (2), .IR prof (3) .SH BUGS Neither command can profile compiled limbo programs.