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Profile Data Merging and Data Format (gmpf960)
Discussion
The gmpf960 utility merges the execution profiles in all infile files and
stores the resulting profile in outfile. Input files can be either the output
from a previous invocation of gmpf960, or the default.pf profiles
created automatically when you run your instrumented program.
NOTE. The tools that accept profiles generally accept multiple profiles
and merge them in the same manner as gmpf960. However, gmpf960 is
the only tool that actually produces profiles, and in particular, is the only
tool that can produce a self-contained profile by conversion from a raw
profile. The other tools always perform the merge internally and discard
the merged profile after processing.
The t option is useful if your execution environment does not support
automatic creation of the default.pf profile file. Use t if your input files
are in the text format described below.
If the t option is not specified, the input files are assumed to be in their
default binary format. Input files can be either the output from a previous
invocation of gmpf960, or the default.pf profiles created automatically
when you run your instrumented application.
Example
The following command reads and processes run1.pf, run2.pf,
run3.pf and merges the results into the self-contained profile summ.spf.
gmpf960 -spf summ.spf run1.pf run2.pf run3.pf
Profile Format Specification
Normally, the raw profile file default.pf is created automatically when
your application calls exit. Alternatively, the gdb960 debugger supports a
profile put command that you can use to extract the profile data from
target memory and write it to default.pf in the appropriate format.
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