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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/tools/perf/Documentation/perf-diff.txt
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perf-diff(1)

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============

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NAME

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----

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perf-diff - Read two perf.data files and display the differential profile

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SYNOPSIS

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--------

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[verse]

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'perf diff' [oldfile] [newfile]

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DESCRIPTION

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-----------

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This command displays the performance difference amongst two perf.data files

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captured via perf record.

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If no parameters are passed it will assume perf.data.old and perf.data.

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OPTIONS

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-------

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-M::

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--displacement::

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        Show position displacement relative to baseline.

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-D::

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--dump-raw-trace::

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        Dump raw trace in ASCII.

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-m::

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--modules::

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        Load module symbols. WARNING: use only with -k and LIVE kernel

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-d::

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--dsos=::

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	Only consider symbols in these dsos. CSV that understands

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	file://filename entries.

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-C::

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--comms=::

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	Only consider symbols in these comms. CSV that understands

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	file://filename entries.

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-S::

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--symbols=::

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	Only consider these symbols. CSV that understands

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	file://filename entries.

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-s::

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--sort=::

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	Sort by key(s): pid, comm, dso, symbol.

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-t::

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--field-separator=::

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	Use a special separator character and don't pad with spaces, replacing

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	all occurrences of this separator in symbol names (and other output)

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	with a '.' character, that thus it's the only non valid separator.

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-v::

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--verbose::

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	Be verbose, for instance, show the raw counts in addition to the

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	diff.

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-f::

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--force::

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       Don't complain, do it.

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--symfs=<directory>::

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        Look for files with symbols relative to this directory.

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SEE ALSO

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--------

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linkperf:perf-record[1]

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