On Wed, Nov 16, 2022 at 08:31:32AM +0800, Jiucheng Xu wrote: > This patch adds support Amlogic meson G12 series SoC > DDR bandwidth PMU driver framework and interfaces. > > The PMU not only can monitor the total DDR bandwidth, > but also the bandwidth which is from individual IP module. > Please write the patch description in imperative mood (no "This patch/commit does foo" but "Do foo" instead). 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. ``` > 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. -- An old man doll... just what I always wanted! - Clara
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