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perf-record
Langue: en
Version: 09/20/2010 (ubuntu - 24/10/10)
Section: 1 (Commandes utilisateur)
NAME
perf-record - Run a command and record its profile into perf.dataSYNOPSIS
perf record [-e <EVENT> | --event=EVENT] [-l] [-a] <command> perf record [-e <EVENT> | --event=EVENT] [-l] [-a] --- <command> [<options>]
DESCRIPTION
This command runs a command and gathers a performance counter profile from it, into perf.data - without displaying anything.
This file can then be inspected later on, using perf report.
OPTIONS
<command>...
- 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.
-a
- System-wide collection.
-l
- 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
- Don't sample.
-R, --raw-samples
- Collect raw sample records from all opened counters (default for tracepoint counters).
SEE ALSO
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