These functions are used by slprof for profiling slsh applications.
Enable code generation to support profiling hooks
profile_on ( [line_by_line] )
This function will turn cause the interpreter to generate code to
call hooks that are used to profile code. The profile_on
function does not establish those hooks, rather it causes code to be
generated to support such hooks.
With no optional argument, only code to support function call hooks will be generated. To enable support for line-by-line profile hooks, a value of 1 should be passed to this function.
profile_off, profile_begin, profile_end, profile_calibrate, profile_report}
Turn off code generation for profiling hooks
profile_off ()
This function turns off the generation of code to support profiling hooks.
profile_on, profile_begin, profile_end, profile_calibrate, profile_report}
Establish profiling hooks and reset the profiler
profile_begin ( [line_by_line] )
This function establishes the profiling hooks and resets or initializes the profiler state. By default, only hooks to gather function call information are created. To enable the gathering of line-by-line information, a value of 1 should be passed to this function.
profile_end, profile_on, profile_off, profile_calibrate, profile_report}
Remove profiling hooks and turn off profiler code generation
profile_end ()
The profile_end function turns off the code generation to
support profiling hooks and removes any profiling hooks that are in
place.
profile_begin, profile_on, profile_off, profile_calibrate, profile_report
Calibrate the profiler
profile_calibrate ([ N ])
This function may be used to ``calibrate'' the profiler. As the
performance of the profiler and the interpreter varies with a
platform and load-dependent manner, this function should be called
prior to enabling the profiler. It tries to determine the average
amount of overhead per statement executed and function call by
executing a series of statements and functions many times to
determine statistically accurate values. The optional parameter
N may be used to control the amount of code executed
for the calibration process. If no value is provided, the N
will default to 1000. The higher the value, the more accurate the
calibration will be and the longer the calibration process will take.
profile_begin, profile_end, profile_on, profile_off, profile_report
Generate the profile report
profile_report (file)
The function may be used to format the profile report and write it
to the specified file. If the file parameter represents a
File_Type file descriptor, then the report will be written
the the descriptor.
profile_begin, profile_end, profile_on, profile_off, profile_calibrate