projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 86a9eee0 | 1 | perf-diff(1) |
| 4778e0e8 | 2 | ============ |
| 86a9eee0 ACM |
3 | |
| 4 | NAME | |
| 5 | ---- | |
| d30531c6 | 6 | perf-diff - Read two perf.data files and display the differential profile |
| 86a9eee0 ACM |
7 | |
| 8 | SYNOPSIS | |
| 9 | -------- | |
| 10 | [verse] | |
| 11 | 'perf diff' [oldfile] [newfile] | |
| 12 | ||
| 13 | DESCRIPTION | |
| 14 | ----------- | |
| d30531c6 | 15 | This command displays the performance difference amongst two perf.data files |
| 86a9eee0 ACM |
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 | ------- | |
| 5ea4f857 SB |
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 | ||
| c351c281 ACM |
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 | |
| 5ea4f857 | 57 | all occurrences of this separator in symbol names (and other output) |
| c351c281 ACM |
58 | with a '.' character, that thus it's the only non valid separator. |
| 59 | ||
| 86a9eee0 ACM |
60 | -v:: |
| 61 | --verbose:: | |
| d30531c6 | 62 | Be verbose, for instance, show the raw counts in addition to the |
| 86a9eee0 | 63 | diff. |
| cdccc690 | 64 | |
| 5ea4f857 SB |
65 | -f:: |
| 66 | --force:: | |
| 67 | Don't complain, do it. | |
| 68 | ||
| ec5761ea DA |
69 | --symfs=<directory>:: |
| 70 | Look for files with symbols relative to this directory. | |
| 5ea4f857 | 71 | |
| 86a9eee0 ACM |
72 | SEE ALSO |
| 73 | -------- | |
| 74 | linkperf:perf-record[1] |