This is our current setup on a Hardkernel odroid-xu3 board based on EXYNOS5422.
1.- Board is running Ubuntu 14.04.1 LTS. Linux kernel 3.10.59 rebuilt with options:
CONFIG_GENERIC_TRACER
CONFIG_TRACING
CONFIG_CONTEXT_SWITCH_TRACER
CONFIG_PROFILING
CONFIG_HIGH_RES_TIMERS
CONFIG_LOCAL_TIMERS
CONFIG_PERF_EVENTS
CONFIG_HW_PERF_EVENTS
CONFIG_CPU_FREQ
2.- Streamline gatord version 20 (DS-5 v5.20) (built form source)
3.- Gator driver build with MALI support (patch applied as proposed in: http://community.arm.com/thread/6863).
When I capture using the Streamline Data View in Eclipse, I get values in Linux and Mali counters, but for all Cortex-A15 counters I tried, I get no values, just zero.
When I select events using Cortex-A15 counters, like the ones in the picture (Bus: Access, Clock:Cycles, Instruction: Executed, etc.) All this counters
always show zero values in the captured session. Other counters selected from Mali or Linux seen to work well.
By the way, in the Counter Configuration dialog box I can see Cortex-A15, Linux and Mali counters. But I can´t see any Cortex-A7 counter.
In the documentation I can find example pictures (as the one shown below) where A7 and A15 counters are shown together...
Should I see both of them A7 and A15?
In this last picture you can see as Mali counters (marked in green) are showing values when I run some OpenCL code on the GPU,
but counters for Cortex-A15 show no activity at all (marked in red).
Is there any special configuration for my Exynos 5 SoC to make Streamline capture the Cortex-A15 and A-7 counters?
I'm stuck right now, I can't find out what I am doing wrong. Any hint will be of great help.
Thanks!
Hi,
I asked in the Odroid forums, and It seems that performance counters on the Odroid-XU3 are not working.
The literal response was: " AFAIK it (performance counters) is not supported"
After some further research I found out this article:
Hardware counters depends on the PMU (Performance Monitor Unit) to work, and it seems that
PMU is not enabled or some permission bits have not been set.
Does anybody knows how to set up the PMU on?
I would appreciate any help.
Thanks
Hi andresr,
The document you reference is our best guide to resolving this issue. The DBGEN/NIDEN signal configuration is SoC dependent, thus search the Samsung documentation for these signal names and hopefully they provide instructions for enabling them.
Wade
Hello All,
I was looking for some perf measurement on Odroid-Xu3 at Samsung and was not able to read perf counters from Odroid -Xu3 device.
I have fixed this issue by adding correct arm-pmu interrupt numbers in dtsi file.
You can get patch from below link
https://github.com/kensoc/kendroid_kern ... b65591b06d
NOTE: Both A15 and A7 hw perf events/counters are not supported at this time.
By default, A15 hw perf events/counters are enabled.
To read/measure A7 hw perf events/counters, refer and uncomment arm-pmu section
of arch/arm/boot/dts/exynos5422_evt0.dtsi file.
Modified files are:
modified: arch/arm/boot/dts/exynos5422_evt0.dtsi
modified: arch/arm/configs/odroidxu3_defconfig
NOTE:
If you are using android OS with this modification, you will observer VOLD service crash and SDCARD won't mount correctly.
Solution:
When we have added ARM-PMU interrupt, kernel has changed platform device tree creations
and due to which "odroid-sysfs.16" was no more available and newly populated name is "odroid-sysfs.17".
This path was not recognized by VOLD service and file open was returning NULL which intern passed in fread operation and vold service was crashing.
Source path is: $ANDROIDSRC/system/vold/main.cpp +161
Old path is: /sys/bus/platform/drivers/odroid-sysfs/odroid_sysfs.16/boot_mode
New path is: /sys/bus/platform/drivers/odroid-sysfs/odroid_sysfs.17/boot_mode
Request to maintainer : pull this changes into mainline kernel and android source