On 30 March 2016 at 09:32, YongQin Liu yongqin.liu@linaro.org wrote:
Hi, kecheng
So you can boot your PandaboardES with the image downloaded from http://releases.linaro.org/14.05/android/panda/, and you can use your DS-5 with it right?
And your problem is that you can not find the CPU PMU data with your DS-5 tool?
If so I don't think I can help you much here. I have no idea about the CPU PMU data.
It might be better to check with the DS-5 team on how to collect the CPU PMU data.
If you are going to the DS-5 team with just "CPU PMU data" you're likely to go nowhere. The PMUs carry a lot of information that get displayed in different areas of the DS-5 interface. As such there isn't one place where you'll find everything.
There is also an extensive PMU framework for ARM CPU that's been consolidated under drivers/perf/, it's probably a good idea to get familiar with that. You can always export the information you want to debug/sysFS if it's not already there. That driver communicates with the rest of the kernel in some way, find out what that mechanism is and use it for what you needs.
Last but not least DS-5 allows you to look at memory area (so does devmem). Since PMUs are memory mapped the raw data can be queried easily.
Just one thing I can think of is that, do you need to configure the DS-5 to collect the CPU PMU data if that is not collected by default?
And I add linaro-android@ in the loop, there might be more people can help you.
Thanks, Yongqin Liu On 30 March 2016 at 22:51, 季柯丞 jkcll302089@gmail.com wrote:
Dear Mr liu: Hi, my name is Ji kecheng. I am a PhD of Southeast University. We wanna use DS-5 to get the CPU PMU(Performance Monitor Unit) with the Pandaboard ES(OMAP 4430/OMAP 4460). However, we have tried the image downloaded with the link as follow, it doesn't work. http://releases.linaro.org/14.05/android/panda/
I'm not a gator expert but I know it is a comprehensive driver. Since the source code is available you should be able to instrument the code and see what/where things are not happening.
We found the gator.ko has been integrated in the image. But we cannot fetch any PMU data. Could you help me to fix this problem?
Ji Kecheng Best Regards
-- Best Regards, Yongqin Liu
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