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OPCONTROL

Section: User Commands (1)
Updated: Sun 24 June 2007
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NAME

opcontrol - control OProfile profiling  

SYNOPSIS


opcontrol [ options ]  

DESCRIPTION

opcontrol can be used to start profiling, end a profiling session, dump profile data, and set up the profiling parameters.

 

OPTIONS

--help
Show help message.
--version
Show version.
--list-events
Shows the monitorable events.
--init
Load the OProfile module if required and make the OProfile driver interface available.
--setup
Followed by list options for profiling setup. Store setup in ~root/.oprofile/daemonrc. Optional.
--status
Show configuration information.
--start-daemon
Start the oprofile daemon without starting profiling. Not available in 2.2/2.4 kernels.
--start
Start data collection with either arguments provided by --setup or with information saved in ~root/.oprofile/daemonrc.
--dump
Force a flush of the collected profiling data to the daemon.
--stop
Stop data collection. Not available in 2.2/2.4 kernels.
--shutdown
Stop data collection and kill the daemon.
--reset
Clear out data from current session, but leaves saved sessions.
--save=sessionname
Save data from current session to sessionname.
--deinit
Shut down daemon. Unload the oprofile module and oprofilefs.
--buffer-size=num
Set kernel buffer to num samples. When using a 2.6 kernel buffer watershed need to be tweaked when changing this value.
--buffer-watershed=num
Set kernel buffer watershed to num samples (2.6 only). When it'll remain only buffer-size - buffer-watershed free entry in the kernel buffer data will be flushed to daemon, most usefull value are in the range [0.25 - 0.5] * buffer-size.
--cpu-buffer-size=num
Set kernel per cpu buffer to num samples (2.6 only). If you profile at high rate it can help to increase this if the log file show excessive count of sample lost cpu buffer overflow.
--event=[event|default]
Add an event to measure for the hardware performance counters, or "default" for the default event. The event is of the form "CPU_CLK_UNHALTED:30000:0:1:1" where the numeric values are count, unit mask, kernel-space counting, user-space counting, respectively.
--separate=[none,lib,kernel,thread,cpu,all]
Separate samples based on the given separator. 'lib' separates dynamically linked library samples per application. 'kernel' separates kernel and kernel module samples per application; 'kernel' implies 'library'. 'thread' gives separation for each thread and task. 'cpu' separates for each CPU. 'all' implies all of the above options and 'none' turns off separation.
--callgraph=#depth
Enable callgraph sample collection with a maximum depth. Use 0 to disable callgraph profiling. This option is currently only usable on x86, using a 2.6+ kernel with callgraph support enabled.
--image=[name,name...|all]
Only profile the given absolute paths to binaries, or "all" to profile everything (the default).
--vmlinux=file
vmlinux kernel image.
--no-vmlinux
Use this when you don't have a kernel vmlinux file, and you don't want to profile the kernel.
--verbose
Be verbose in the daemon log. This has a high overhead.
--kernel-range=start,end
Set kernel range vma address in hexadecimal.

 

OPTIONS (specific to Xen)

--xen=file
Xen image
--active-domains=<list>
List of domain ids participating in a multi-domain profiling session. If more than one domain is specified in <list> they should be separated using commas. This option can only be used in domain 0 which is the only domain that can coordinate a multi-domain profiling session. Including domain 0 in the list of active domains is optional. (e.g. --active-domains=2,5,6 and --active-domains=0,2,5,6 are equivalent)

 

ENVIRONMENT

No special environment variables are recognised by opcontrol.

 

FILES

/root/.oprofile/daemonrc
Configuration file for opcontrol
/var/lib/oprofile/samples/
The location of the generated sample files.

 

VERSION

This man page is current for oprofile-0.9.2.

 

SEE ALSO

/usr/share/doc/oprofile/, oprofile(1)


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
OPTIONS (specific to Xen)
ENVIRONMENT
FILES
VERSION
SEE ALSO




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