Re: [PATCH v10 1/2] perf/amlogic: Add support for Amlogic meson G12 SoC DDR PMU driver

From: Jiucheng Xu
Date: Wed Nov 16 2022 - 05:05:04 EST



What about this description below?

```
Add support for Amlogic Meson G12 Series SOC - DDR bandwidth PMU driver
framework and interfaces. The PMU can not only monitor the total DDR
bandwidth, but also individual IP module bandwidth.
```
Thanks, Your description looks like much better. I agree with you.
Example usage:

$ perf stat -a -e meson_ddr_bw/total_rw_bytes/ -I 1000 sleep 10

- or -

$ perf stat -a -e \
meson_ddr_bw/total_rw_bytes/,\
meson_ddr_bw/chan_1_rw_bytes,arm=1/ -I 1000 \
sleep 10

g12 SoC support 4 channels to monitor DDR bandwidth
simultaneously. Each channel can monitor up to 4 IP modules
simultaneously.

For Instance, If you want to get the sum of DDR bandwidth
from CPU, GPU, USB3.0 and VDEC. You can use the following
command parameters to display.

$ perf stat -a -e \
meson_ddr_bw/chan_2_rw_bytes,arm=1,gpu=1,usb3_0=1,nna=1/ -I 1000 \
sleep 10

Other events are supported, and advertised via perf list.
The demo example should have been outside the patch description, though
(more appropriate documentation as in patch [2/2]).

Thanks.
Okay, I will modify it in the next version.

--
Thanks,
Jiucheng