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Source at commit ec7cab4cbb721bff91ec924ec691efd8daf36579 created 12 years 8 months ago. By Maarten ter Huurne, MIPS: JZ4740: A320: Updated quickstart documentation. | |
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1 | perf-diff(1) |
2 | ============ |
3 | |
4 | NAME |
5 | ---- |
6 | perf-diff - Read two perf.data files and display the differential profile |
7 | |
8 | SYNOPSIS |
9 | -------- |
10 | [verse] |
11 | 'perf diff' [oldfile] [newfile] |
12 | |
13 | DESCRIPTION |
14 | ----------- |
15 | This command displays the performance difference amongst two perf.data files |
16 | captured via perf record. |
17 | |
18 | If no parameters are passed it will assume perf.data.old and perf.data. |
19 | |
20 | OPTIONS |
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 | |
72 | SEE ALSO |
73 | -------- |
74 | linkperf:perf-record[1] |
75 |
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