projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 514f1c67 ACM |
1 | perf-trace(1) |
| 2 | ============= | |
| 3 | ||
| 4 | NAME | |
| 5 | ---- | |
| 6 | perf-trace - strace inspired tool | |
| 7 | ||
| 8 | SYNOPSIS | |
| 9 | -------- | |
| 10 | [verse] | |
| 11 | 'perf trace' | |
| 5e2485b1 | 12 | 'perf trace record' |
| 514f1c67 ACM |
13 | |
| 14 | DESCRIPTION | |
| 15 | ----------- | |
| 16 | This command will show the events associated with the target, initially | |
| 17 | syscalls, but other system events like pagefaults, task lifetime events, | |
| 18 | scheduling events, etc. | |
| 19 | ||
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20 | This is a live mode tool in addition to working with perf.data files like |
| 21 | the other perf tools. Files can be generated using the 'perf record' command | |
| 22 | but the session needs to include the raw_syscalls events (-e 'raw_syscalls:*'). | |
| 23 | Alernatively, the 'perf trace record' can be used as a shortcut to | |
| 24 | automatically include the raw_syscalls events when writing events to a file. | |
| 25 | ||
| 26 | The following options apply to perf trace; options to perf trace record are | |
| 27 | found in the perf record man page. | |
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28 | |
| 29 | OPTIONS | |
| 30 | ------- | |
| 31 | ||
| ac9be8ee | 32 | -a:: |
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33 | --all-cpus:: |
| 34 | System-wide collection from all CPUs. | |
| 35 | ||
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36 | -e:: |
| 37 | --expr:: | |
| 38 | List of events to show, currently only syscall names. | |
| b059efdf ACM |
39 | Prefixing with ! shows all syscalls but the ones specified. You may |
| 40 | need to escape it. | |
| 2ae3a312 | 41 | |
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42 | -o:: |
| 43 | --output=:: | |
| 44 | Output file name. | |
| 45 | ||
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46 | -p:: |
| 47 | --pid=:: | |
| 48 | Record events on existing process ID (comma separated list). | |
| 49 | ||
| ac9be8ee | 50 | -t:: |
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51 | --tid=:: |
| 52 | Record events on existing thread ID (comma separated list). | |
| 53 | ||
| ac9be8ee | 54 | -u:: |
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55 | --uid=:: |
| 56 | Record events in threads owned by uid. Name or number. | |
| 57 | ||
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58 | -v:: |
| 59 | --verbose=:: | |
| 60 | Verbosity level. | |
| 61 | ||
| ac9be8ee | 62 | -i:: |
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63 | --no-inherit:: |
| 64 | Child tasks do not inherit counters. | |
| 65 | ||
| ac9be8ee | 66 | -m:: |
| 514f1c67 | 67 | --mmap-pages=:: |
| 27050f53 JO |
68 | Number of mmap data pages (must be a power of two) or size |
| 69 | specification with appended unit character - B/K/M/G. The | |
| 70 | size is rounded up to have nearest pages power of two value. | |
| 514f1c67 | 71 | |
| ac9be8ee | 72 | -C:: |
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73 | --cpu:: |
| 74 | Collect samples only on the list of CPUs provided. Multiple CPUs can be provided as a | |
| 75 | comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2. | |
| 76 | In per-thread mode with inheritance mode on (default), Events are captured only when | |
| 77 | the thread executes on the designated CPUs. Default is to monitor all CPUs. | |
| 78 | ||
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79 | --duration: |
| 80 | Show only events that had a duration greater than N.M ms. | |
| 81 | ||
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82 | --sched: |
| 83 | Accrue thread runtime and provide a summary at the end of the session. | |
| 84 | ||
| 6810fc91 DA |
85 | -i |
| 86 | --input | |
| 87 | Process events from a given perf data file. | |
| 88 | ||
| 4bb09192 DA |
89 | -T |
| 90 | --time | |
| 91 | Print full timestamp rather time relative to first sample. | |
| 92 | ||
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93 | --comm:: |
| 94 | Show process COMM right beside its ID, on by default, disable with --no-comm. | |
| 95 | ||
| fd2eabaf | 96 | -s:: |
| bf2575c1 | 97 | --summary:: |
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98 | Show only a summary of syscalls by thread with min, max, and average times |
| 99 | (in msec) and relative stddev. | |
| 100 | ||
| 101 | -S:: | |
| 102 | --with-summary:: | |
| 103 | Show all syscalls followed by a summary by thread with min, max, and | |
| 104 | average times (in msec) and relative stddev. | |
| bf2575c1 | 105 | |
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106 | --tool_stats:: |
| 107 | Show tool stats such as number of times fd->pathname was discovered thru | |
| 108 | hooking the open syscall return + vfs_getname or via reading /proc/pid/fd, etc. | |
| 109 | ||
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110 | SEE ALSO |
| 111 | -------- | |
| 112 | linkperf:perf-record[1], linkperf:perf-script[1] |