PERF-RECORD(1) perf Manual PERF-RECORD(1)NAMEperf-record - Run a command and record its profile into perf.data
SYNOPSIS
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.
--filter=<filter>
Event filter.
-a, --all-cpus
System-wide collection from all CPUs.
-l
Scale counter values.
-p, --pid=
Record events on existing process ID (comma separated list).
-t, --tid=
Record events on existing thread ID (comma separated list).
-u, --uid=
Record events in threads owned by uid. Name or number.
-r, --realtime=
Collect data with this RT SCHED_FIFO priority.
-D, --no-delay
Collect data without buffering.
-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. Must be a power of two.
-g, --call-graph
Do call-graph (stack chain/backtrace) recording.
-q, --quiet
Don’t print any message, useful for scripting.
-v, --verbose
Be more verbose (show counter open errors, etc).
-s, --stat
Per thread counts.
-d, --data
Sample addresses.
-T, --timestamp
Sample timestamps. Use it with perf report -D to see the
timestamps, for instance.
-n, --no-samples
Don’t sample.
-R, --raw-samples
Collect raw sample records from all opened counters (default for
tracepoint counters).
-C, --cpu
Collect samples only on the list of CPUs provided. Multiple CPUs
can be provided as a comma-separated list with no space: 0,1.
Ranges of CPUs are specified with -: 0-2. In per-thread mode with
inheritance mode on (default), samples are captured only when the
thread executes on the designated CPUs. Default is to monitor all
CPUs.
-N, --no-buildid-cache
Do not update the builid cache. This saves some overhead in
situations where the information in the perf.data file (which
includes buildids) is sufficient.
-G name,..., --cgroup name,...
monitor only in the container (cgroup) called "name". This option
is available only in per-cpu mode. The cgroup filesystem must be
mounted. All threads belonging to container "name" are monitored
when they run on the monitored CPUs. Multiple cgroups can be
provided. Each cgroup is applied to the corresponding event, i.e.,
first cgroup to first event, second cgroup to second event and so
on. It is possible to provide an empty cgroup (monitor all the
time) using, e.g., -G foo,,bar. Cgroups must have corresponding
events, i.e., they always refer to events defined earlier on the
command line.
-b, --branch-any
Enable taken branch stack sampling. Any type of taken branch may be
sampled. This is a shortcut for --branch-filter any. See
--branch-filter for more infos.
-j, --branch-filter
Enable taken branch stack sampling. Each sample captures a series
of consecutive taken branches. The number of branches captured with
each sample depends on the underlying hardware, the type of
branches of interest, and the executed code. It is possible to
select the types of branches captured by enabling filters. The
following filters are defined:
· any: any type of branches
· any_call: any function call or system call
· any_ret: any function return or system call return
· ind_call: any indirect branch
· u: only when the branch target is at the user level
· k: only when the branch target is in the kernel
· hv: only when the target is at the hypervisor level
The option requires at least one branch type among any, any_call,
any_ret, ind_call. The privilege levels may be ommitted, in which
case, the privilege levels of the associated event are applied to
the branch filter. Both kernel (k) and hypervisor (hv) privilege
levels are subject to permissions. When sampling on multiple
events, branch stack sampling is enabled for all the sampling
events. The sampled branch type is the same for all events. The
various filters must be specified as a comma separated list:
--branch-filter any_ret,u,k Note that this feature may not be
available on all processors.
SEE ALSOperf-stat(1), perf-list(1)perf 3.6.11-4.fc16.x8 01/08/2013 PERF-RECORD(1)
