---------- Forwarded message ---------- From: Dave Martin dave.martin@linaro.org Date: Wed, Feb 2, 2011 at 4:55 PM Subject: Re: query regarding perf To: Sudip Jain sudip.jain@linaro.org
On Wed, Feb 2, 2011 at 11:09 AM, Sudip Jain sudip.jain@linaro.org wrote:
I am getting the error when I execute perf on U8500 No permission to collect stats. Consider tweaking /proc/sys/kernel/perf_event_paranoid. The problem I think is perf version and kernel version are not same.On ubuntu host x86 machine, if I do sudo apt-get install linux-tools-common, then perf runs succesfully. Even I downloaded the source code using sudo apt-get source linux-tools-common and re-built perf. It works.
Yes, you'll need the perf tools to be (reasonably) in sync with the kernel.
The linux-linaro-tools package provides the tools for the released kernels, but if you're working with a development kernel it may be better to build the tools yourself, as you describe.
Recently my ubuntu host crashed, I re-installed with 10.04, the kernel version is 2.6.32-21 and perf version is 2.6.35.8. So again I am getting
the
same error (now on ubuntu host) which I mentioned above. Though now I have the opportunity to debug the perf code, but that is not my target. I am hoping that panda/beagle is fully supported for ubuntu mainstream
AFAIK panda and beagle both ought to work, but please shout if you run into problems!
Cheers ---Dave