| 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. | |
| 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] |