1perf-diff(1)
2============
3
4NAME
5----
6perf-diff - Read two perf.data files and display the differential profile
7
8SYNOPSIS
9--------
10[verse]
11'perf diff' [oldfile] [newfile]
12
13DESCRIPTION
14-----------
15This command displays the performance difference amongst two perf.data files
16captured via perf record.
17
18If no parameters are passed it will assume perf.data.old and perf.data.
19
20OPTIONS
21-------
22-M::
23--displacement::
24        Show position displacement relative to baseline.
25
26-D::
27--dump-raw-trace::
28        Dump raw trace in ASCII.
29
30-m::
31--modules::
32        Load module symbols. WARNING: use only with -k and LIVE kernel
33
34-d::
35--dsos=::
36	Only consider symbols in these dsos. CSV that understands
37	file://filename entries.
38
39-C::
40--comms=::
41	Only consider symbols in these comms. CSV that understands
42	file://filename entries.
43
44-S::
45--symbols=::
46	Only consider these symbols. CSV that understands
47	file://filename entries.
48
49-s::
50--sort=::
51	Sort by key(s): pid, comm, dso, symbol.
52
53-t::
54--field-separator=::
55
56	Use a special separator character and don't pad with spaces, replacing
57	all occurrences of this separator in symbol names (and other output)
58	with a '.' character, that thus it's the only non valid separator.
59
60-v::
61--verbose::
62	Be verbose, for instance, show the raw counts in addition to the
63	diff.
64
65-f::
66--force::
67       Don't complain, do it.
68
69--symfs=<directory>::
70        Look for files with symbols relative to this directory.
71
72SEE ALSO
73--------
74linkperf:perf-record[1]
75