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Langue: en

Autres versions - même langue

Version: 10/19/2010 (fedora - 01/12/10)

Section: 1 (Commandes utilisateur)


perf-record - Run a command and record its profile into


 perf record [-e <EVENT> | --event=EVENT] [-l] [-a] <command>
 perf record [-e <EVENT> | --event=EVENT] [-l] [-a] --- <command> [<options>]


This command runs a command and gathers a performance counter profile from it, into - without displaying anything.

This file can then be inspected later on, using perf report.



Any command you can specify in a shell.

-e, --event=

Select the PMU event. Selection can be:
* a symbolic event name (use perf list to list all events)
* a raw PMU event (eventsel+umask) in the form of rNNN where NNN is a hexadecimal event descriptor.
* a hardware breakpoint event in the form of \mem:addr[:access] where addr is the address in memory you want to break in. Access is the memory access type (read, write, execute) it can be passed as follows: \mem:addr[:[r][w][x]]. If you want to profile read-write accesses in 0x1000, just set mem:0x1000:rw.


System-wide collection.


Scale counter values.

-p, --pid=

Record events on existing pid.

-r, --realtime=

Collect data with this RT SCHED_FIFO priority.

-A, --append

Append to the output file to do incremental profiling.

-f, --force

Overwrite existing data file. (deprecated)

-c, --count=

Event period to sample.

-o, --output=

Output file name.

-i, --no-inherit

Child tasks do not inherit counters.

-F, --freq=

Profile at this frequency.

-m, --mmap-pages=

Number of mmap data pages.

-g, --call-graph

Do call-graph (stack chain/backtrace) recording.

-v, --verbose

Be more verbose (show counter open errors, etc).

-s, --stat

Per thread counts.

-d, --data

Sample addresses.

-n, --no-samples

Doncqt sample.

-R, --raw-samples

Collect raw sample records from all opened counters (default for tracepoint counters).


perf-stat(1), perf-list(1)

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