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
