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GNU/Linux |
CentOS 4.8 |
i386 |
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opcontrol(1) |
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opcontrol − control OProfile profiling
opcontrol [ options ]
opcontrol can be used to start profiling, end a profiling session, dump profile data, and set up the profiling parameters.
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--help |
Show help message. |
--version
Show version.
--list-events
Shows the monitorable events.
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--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.
--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 of information saved in ~root/.oprofile/daemonrc.
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--dump |
Force a flush of the collected profiling data to the daemon. | ||
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--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.
--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.
No special environment variables are recognised by opreport.
/root/.oprofile/daemonrc
Configuration file for opcontrol
/var/lib/oprofile/samples/
The location of the generated sample files.
This man page is current for oprofile-0.8.1.
/usr/share/doc/oprofile/, oprofile(1)
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opcontrol(1) | |