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
20The differential profile is displayed only for events matching both
21specified perf.data files.
22
23OPTIONS
24-------
25-M::
26--displacement::
27        Show position displacement relative to baseline.
28
29-D::
30--dump-raw-trace::
31        Dump raw trace in ASCII.
32
33-m::
34--modules::
35        Load module symbols. WARNING: use only with -k and LIVE kernel
36
37-d::
38--dsos=::
39	Only consider symbols in these dsos. CSV that understands
40	file://filename entries.
41
42-C::
43--comms=::
44	Only consider symbols in these comms. CSV that understands
45	file://filename entries.
46
47-S::
48--symbols=::
49	Only consider these symbols. CSV that understands
50	file://filename entries.
51
52-s::
53--sort=::
54	Sort by key(s): pid, comm, dso, symbol.
55
56-t::
57--field-separator=::
58
59	Use a special separator character and don't pad with spaces, replacing
60	all occurrences of this separator in symbol names (and other output)
61	with a '.' character, that thus it's the only non valid separator.
62
63-v::
64--verbose::
65	Be verbose, for instance, show the raw counts in addition to the
66	diff.
67
68-f::
69--force::
70       Don't complain, do it.
71
72--symfs=<directory>::
73        Look for files with symbols relative to this directory.
74
75SEE ALSO
76--------
77linkperf:perf-record[1]
78