几篇关于oprofile分析性能的文章

下面是使用oprofile分析性能的一些命令。

[root@10-150-110-85 samples]#  opcontrol   --start
Profiler running.
[root@10-150-110-85 samples]#  opcontrol   --stop
Stopping profiling.
[root@10-150-110-85 samples]# opcontrol --help
opcontrol: usage:
-l/--list-events list event types and unit masks
-?/--help        this message
-v/--version     show version
--init           loads the oprofile module and oprofilefs
--setup          give setup arguments (may be omitted)
--status         show configuration
--start-daemon   start daemon without starting profiling
-s/--start       start data collection
-d/--dump        flush the collected profiling data
-t/--stop        stop data collection
-h/--shutdown    stop data collection and kill daemon
-V/--verbose[=all,sfile,arcs,samples,module,misc,ext]
be verbose in the daemon log
--reset          clears out data from current session
--save=name      save data from current session to session_name
--deinit         unload the oprofile module and oprofilefs

-e/--event=eventspec

Choose an event. May be specified multiple times. Of the form
"default" or "name:count:unitmask:kernel:user", where :

name:     event name, e.g. CPU_CLK_UNHALTED or RTC_INTERRUPTS
count:    reset counter value e.g. 100000
unitmask: hardware unit mask e.g. 0x0f
kernel:   whether to profile kernel: 0 or 1
user:     whether to profile userspace: 0 or 1

-p/--separate=type,[types]

Separate profiles as follows :

none:     no profile separation
library:  separate shared library profiles per-application
kernel:   same as library, plus kernel profiles
thread:   per-thread/process profiles
cpu:      per CPU profiles
all:      all of the above

-c/--callgraph=#depth         enable callgraph sample collection with a
maximum depth. Use '0' to disable callgraph
profiling.
--session-dir=dir             place sample database in dir instead of
default location (/var/lib/oprofile)
-i/--image=name[,names]       list of binaries to profile (default is "all")
--vmlinux=file                vmlinux kernel image
--no-vmlinux                  no kernel image (vmlinux) available
--kernel-range=start,end      kernel range vma address in hexadecimal
--buffer-size=num             kernel buffer size in sample units.
Rules: A non-zero value goes into effect after
a '--shutdown/start' sequence.  A value of
zero sets this parameter back to default value
but does not go into effect until after a
'--deinit/init' sequence.
--buffer-watershed            kernel buffer watershed in sample units (2.6
kernel). Same rules as defined for
buffer-size.
--cpu-buffer-size=num         per-cpu buffer size in units (2.6 kernel)
Same rules as defined for buffer-size.
--note-table-size             kernel notes buffer size in notes units (2.4
kernel)

--xen                         Xen image (for Xen only)
--active-domains=       List of domains in profiling session (for Xen)
(list contains domain ids separated by commas)
[root@10-150-110-85 samples]# oprofile stop
-bash: oprofile: command not found
[root@10-150-110-85 samples]# oprofile --stop
-bash: oprofile: command not found
[root@10-150-110-85 samples]# opcontrol --stop
[root@10-150-110-85 samples]# opcontrol -l|more
oprofile: available events for CPU type "Intel Sandy Bridge microarchitecture"

See Intel Architecture Developer's Manual Volume 3B, Appendix A and
Intel Architecture Optimization Reference Manual (730795-001)

For architectures using unit masks, you may be able to specify
unit masks by name.  See 'opcontrol' man page for more details.

CPU_CLK_UNHALTED: (counter: all)
Clock cycles when not halted (min count: 6000)
UNHALTED_REFERENCE_CYCLES: (counter: all)
Unhalted reference cycles (min count: 6000)
Unit masks (default 0x1)
----------
0x01: No unit mask
INST_RETIRED: (counter: all)
number of instructions retired (min count: 6000)
LLC_MISSES: (counter: all)
Last level cache demand requests from this core that missed the LLC (min count: 6000)
Unit masks (default 0x41)
----------
0x41: No unit mask
LLC_REFS: (counter: all)
Last level cache demand requests from this core (min count: 6000)
Unit masks (default 0x4f)
----------
0x4f: No unit mask
BR_INST_RETIRED: (counter: all)
number of branch instructions retired (min count: 500)
BR_MISS_PRED_RETIRED: (counter: all)
number of mispredicted branches retired (precise) (min count: 500)
ld_blocks: (counter: all)
blocked loads (min count: 100000)
Unit masks (default 0x1)

link 1 http://www.ibm.com/developerworks/cn/linux/l-oprof/
link 2 
link 3