Re: [PATCH v2 0/2] arm64: dts: rockchip: Support PMU for rk3399 SoCs

[Caesar Wang <wxt@rock-chips.com>]

Heiko,

What do you think of it?
Maybe I need re-update these patches on next kernel, and re-test them.

On 2016年07月06日 16:05, Caesar Wang wrote:
> Hello Heiko, Marc & ARM guys
>
> When Jay first submitted the rk3399.dtsi upstream
> <https://patchwork.kernel.org/patch/8885821/> he had the PMU node in there,
> but then took it out because the upstream binding wasn't done yet.
> It looks as if the upstream stuff has landed, since in linux/master I see:
> 287e9357abcc DT/arm,gic-v3: Documment PPI partition support
> e3825ba1af3a irqchip/gic-v3: Add support for partitioned PPIs
> 9e2c986cb460 irqchip: Add per-cpu interrupt partitioning library
> 222df54fd8b7 genirq: Allow the affinity of a percpu interrupt to be set/retrieved
> 651e8b54abde irqdomain: Allow domain matching on irq_fwspec
>
> This series patches add to support the rk3399 SoCs PMU.
> I pick up the https://patchwork.kernel.org/patch/9209369/.
>
> As do some tests with ChromeOs for my rk3399 board.
> Tested with linus master 4.7-rc6 kernel on rk3399 board.
> https://github.com/Caesar-github/rockchip/tree/rk3399/pmu-upstream
>
> localhost / # perf list
>
> List of pre-defined events (to be used in -e):
> cpu-cycles OR cycles [Hardware event]
> instructions [Hardware event]
> cache-references [Hardware event]
> cache-misses [Hardware event]
> branch-instructions OR branches [Hardware event]
> branch-misses [Hardware event]
> bus-cycles [Hardware event]
> ...
>
> perf stat --cpu 0/1/2/3..... to minitor
> e.g. cpu0;
>
> localhost / # perf stat --cpu 0
>
> Performance counter stats for 'CPU(s) 0':
>
> 3374.917571 task-clock (msec) # 1.001 CPUs utilized [100.00%]
> 20 context-switches # 0.006 K/sec [100.00%]
> 2 cpu-migrations # 0.001 K/sec [100.00%]
> 55 page-faults # 0.016 K/sec
> 7151843 cycles # 0.002 GHz [100.00%]
> <not supported> stalled-cycles-frontend
> <not supported> stalled-cycles-backend
> 4272536 instructions # 0.60 insns per cycle [100.00%]
> 568406 branches # 0.168 M/sec [100.00%]
> 65652 branch-misses # 11.55% of all branches
>
> Also, 'perf top' to monitor the PMU interrupts from cpus
>
> -Caesar
>
>
> Changes in v2:
> - AS Mark comments on https://patchwork.kernel.org/patch/9209369/
>    remove the interrupt-affinity property, we need depend on Marc' perf
>    code on https://patchwork.kernel.org/patch/9209369/.
>
> Caesar Wang (2):
>    arm64: dts: rockchip: change all interrupts cells for 4 on rk3399 SoCs
>    arm64: dts: rockchip: support the pmu node for rk3399
>
>   arch/arm64/boot/dts/rockchip/rk3399.dtsi | 118 ++++++++++++++++++-------------
>   1 file changed, 69 insertions(+), 49 deletions(-)
>


-- 
caesar wang | software engineer | wxt@rock-chip.com