Re: Announcement: Release Candidate 1 for OProfile 1.0.0

Hi Will,

On Fri, Sep 05, 2014 at 06:28:24PM +0100, William Cohen wrote:
> I noticed that the kernel was reporting instruction counts for ARM cortex
> a9. It looks like it is using the following INS_RENAME, 0x68 instead.
> "perf stat" reports cpu cycles on cortex a9, but operf on cortex a9
> returns the following (it work fine on a cortex a15):
> 
> [root@dhcp129-63 testsuite]# operf stat ls
> perf_event_open failed with Operation not supported
> Caught runtime_error: Internal Error.  Perf event setup failed.
> Error running profiler

Strange... it seems to work fine on my A9-based board:

will@room-service:~$ operf stat /bin/ls
Kernel profiling is not possible with current system config.
Set /proc/sys/kernel/kptr_restrict to 0 to collect kernel samples.
operf: Profiler started
  File: ‘/bin/ls’
    Size: 71792	Blocks: 144        IO Block: 4096   regular file
    Device: dh/13d	Inode: 28841156    Links: 1
    Access: (0755/-rwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
    Access: 2014-09-08 12:41:43.585078000 +0000
    Modify: 2014-04-15 06:29:21.000000000 +0000
    Change: 2014-06-16 09:53:58.981624000 +0000
     Birth: -

     Profiling done

$ opreport
Using /home/will/oprofile_data/samples/ for samples directory.
CPU: ARM Cortex-A9
Counted CPU_CYCLES events (CPU cycle) with a unit mask of 0x00 (No unit mask) count 100000
CPU_CYCLES:100000|
  samples|      %|
------------------
      104 100.000 stat
	CPU_CYCLES:100000|
	  samples|      %|
	------------------
	       85 81.7308 no-vmlinux
	       12 11.5385 ld-2.19.so
	        7  6.7308 libc-2.19.so

$ uname -a
Linux room-service 3.16.0 #3 SMP PREEMPT Mon Sep 8 14:05:54 BST 2014 armv7l GNU/Linux

Will

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