AM62L: How to measure DDR throughput on AM62L

Mukul Bhatnagar

Guru* 83225 points

Part Number: AM62L
Other Parts Discussed in Thread: AM62P,

Tool/software:

Other silicon vendors have DDR throughput

See:https://wiki.st.com/stm32mpu/wiki/How_to_measure_the_DDR_throughput.

Does TI have something similar to this.

1 month ago

0 Mukul Bhatnagar 1 month ago

TI__Guru* 83225 points

This is enabled through our K3conf tools

For AM62x, AM62P,

Please see the following link https://git.ti.com/cgit/k3conf/k3conf/tree/README.md & https://texasinstruments.github.io/processor-sdk-doc/processor-sdk-linux-AM62X/esd/docs/11_00_09_04/linux/How_to_Guides/Target/How_to_Use_K3Conf_Tool.html

root@am62xx-evm:~# k3conf ddrbw

We also incorporate this in some of out demos example

QT OOB which uses perf_stats.cpp underneath - https://texasinstruments.github.io/processor-sdk-doc/processor-sdk-linux-AM62X/esd/docs/11_00_09_04/_images/ti-apps-launcher-home-am62x.png

Right now the same tooling is not enabled AM62L (it is in our roadmap)

We will try to provide you a stop gap solution for that in coming weeks.

+1 Bin Liu 1 month ago in reply to Mukul Bhatnagar

TI__Guru**** 162151 points

The tool k3conf (https://git.ti.com/cgit/k3conf/k3conf/) has command "ddrbw" to measure the DDR utilization.

Please clone the k3conf repo (https://git.ti.com/git/k3conf/k3conf.git, the current HEAD is 30a1d5b2d08c "soc: Add support for J742s2"), then apply the 2 patches attached below. The first patch enables the ddrbw command for AM62Lx, and the second patch fixes a bug in the ddrbw command.

0001-common-ddr-perf-enable-for-am62l-device.patch

0002-common-ddr-perf-Fix-backwards-read-and-write-counter.patch

Then follow the project README.md to compile k3conf:

$ sudo apt install build-essential cmake
$ sudo apt install gcc-aarch64-linux-gnu
$ export CC=aarch64-linux-gnu-gcc
$ mkdir build
$ cd build
$ cmake .. -Dstatic_exe=ON
$ make

Now copy the k3conf binary to the AM62Lx root filesystem. (for your convenience, I attached the binary below.)

8308.k3conf

To run the tool in AM62Lx Linux, do

# k3conf ddrbw [<sample_duration>] [<count>]
sample_duration: delay between samples in seconds (default: 1 second)
count: number of samples to capture before stopping (default: -1 infinite)

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AM62L: How to measure DDR throughput on AM62L