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PMCANNOTATE(8) FreeBSD System Manager's Manual PMCANNOTATE(8)
NAME
pmcannotate - sources printout with inlined profiling
SYNOPSIS
pmcannotate [-a] [-h] [-k pathname] [-l level] pmcout.out binaryobj
DESCRIPTION
The pmcannotate utility can produce both C sources or assembly sources of
a program with a line-by-line based profiling. The profiling information
is retrieved through a pmcstat(8) raw output while the program operations
are retrieved through the objdump(1) tool.
When calling pmcannotate the raw output is passed through the pmcout.out
argument, while the program is passed through the binaryobj argument.
As long as pmcannotate relies on objdump(1) and pmcstat(8) to work, it
will fail if one of them is not available.
OPTIONS
The following options are available:
-a Shows the program profiling inlined in the assembly code only.
No C information involving C sources is provided.
-h Prints out information about the usage of the tool.
-l level
Changes the lower bound (expressed in percentage) for traced
functions that will be printed out in the report. The default
value is 0.5%.
-k kerneldir
Set the pathname of the kernel directory to argument kerneldir.
This directory specifies where pmcannotate should look for the
kernel and its modules. The default is /boot/kernel.
LIMITATIONS
As long as pmcannotate relies on the objdump(1) utility to retrieve the C
code, the program needs to be compiled with debugging options.
Sometimes, in particular with heavy optimization levels, the objdump(1)
utility embeds the code of inlining functions directly in the callers,
making an output difficult to read. The x86 version reports the sampling
from pmcstat collecting the following instruction in regard of the
interrupted one. This means that the samples may be attributed to the
line below the one of interest.
SEE ALSO
objdump(1), pmcstat(8)
AUTHORS
Attilio Rao <attilio@FreeBSD.org>
FreeBSD 14.0-RELEASE-p11 November 20, 2008 FreeBSD 14.0-RELEASE-p11