mirror of https://gitee.com/openkylin/linux.git
78 lines
1.5 KiB
Plaintext
78 lines
1.5 KiB
Plaintext
perf-diff(1)
|
|
============
|
|
|
|
NAME
|
|
----
|
|
perf-diff - Read two perf.data files and display the differential profile
|
|
|
|
SYNOPSIS
|
|
--------
|
|
[verse]
|
|
'perf diff' [oldfile] [newfile]
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
This command displays the performance difference amongst two perf.data files
|
|
captured via perf record.
|
|
|
|
If no parameters are passed it will assume perf.data.old and perf.data.
|
|
|
|
The differential profile is displayed only for events matching both
|
|
specified perf.data files.
|
|
|
|
OPTIONS
|
|
-------
|
|
-M::
|
|
--displacement::
|
|
Show position displacement relative to baseline.
|
|
|
|
-D::
|
|
--dump-raw-trace::
|
|
Dump raw trace in ASCII.
|
|
|
|
-m::
|
|
--modules::
|
|
Load module symbols. WARNING: use only with -k and LIVE kernel
|
|
|
|
-d::
|
|
--dsos=::
|
|
Only consider symbols in these dsos. CSV that understands
|
|
file://filename entries.
|
|
|
|
-C::
|
|
--comms=::
|
|
Only consider symbols in these comms. CSV that understands
|
|
file://filename entries.
|
|
|
|
-S::
|
|
--symbols=::
|
|
Only consider these symbols. CSV that understands
|
|
file://filename entries.
|
|
|
|
-s::
|
|
--sort=::
|
|
Sort by key(s): pid, comm, dso, symbol.
|
|
|
|
-t::
|
|
--field-separator=::
|
|
|
|
Use a special separator character and don't pad with spaces, replacing
|
|
all occurrences of this separator in symbol names (and other output)
|
|
with a '.' character, that thus it's the only non valid separator.
|
|
|
|
-v::
|
|
--verbose::
|
|
Be verbose, for instance, show the raw counts in addition to the
|
|
diff.
|
|
|
|
-f::
|
|
--force::
|
|
Don't complain, do it.
|
|
|
|
--symfs=<directory>::
|
|
Look for files with symbols relative to this directory.
|
|
|
|
SEE ALSO
|
|
--------
|
|
linkperf:perf-record[1]
|