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The following example generates a gprof-like
list from an experiment. The output is a file named er_print.out which
lists the top 100 functions, followed by caller-callee data, sorted by attributed
user time for each.
er_print -outfile er_print.out -metrics e.%user \
-sort e.user -limit 100 -functions -cmetrics a.user \
-csort a.user -callers-callees test.1.er
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You can also simplify this example into the following independent commands.
However, keep in mind that each call to er_print in a large
experiment or application can be time intensive.
er_print -metrics e.%user -sort e.user \
-limit 100 -functions test.1.er
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er_print -cmetrics a.%user -csort a.user \
-callers-callees test.1.er
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This example summarizes how time is spent in functions.
er_print -functions test.*.er
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This example shows the caller-callee relationships.
er_print -callers-callees test.*.er
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This example shows which source lines are hot. Source-line
information assumes the code was compiled and linked with -g.
Append a trailing underscore to the function name for Fortran functions and
routines. The 1 after the function name is used to distinguish
between multiple instances of myfunction.
er_print -source myfunction 1 test.*.er
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This example shows only the compiler commentary. It is not
necessary to run your program in order to use this command.
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These examples use wall-clock profiling to list functions
and callers-callees.
er_print -metrics ei.%wall -functions test.*.er
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er_print -cmetrics aei.%wall -callers-callees test.*.er
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This example shows how to run a script containing er_print commands.
er_print -script myscriptfile test.1.er
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The myscriptfile script contains er_print commands.
A sample of the script file contents follows:
## myscriptfile
## Send script output to standard output
outfile -
## Display descriptive information about the experiments
header
## Write out the sample data for all experiments
overview
## Write out execution statistics, aggregated over
## the current sample set for all experiments
statistics
## List functions
functions
## Display status and names of available load objects
object_list
## Write out annotated disassembly code for systime,
## to file disasm.out
outfile disasm.out
disasm systime
## Write out annotated source code for synprog.c
## to file source.out
outfile source.out
source synprog.c
## Terminate processing of the script
quit
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