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

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Date:	Thu, 14 Jul 2016 09:14:57 +0800
From:	Caesar Wang <caesar.upstream@...il.com>
To:	Mark Rutland <mark.rutland@....com>,
	Heiko Stuebner <heiko@...ech.de>
CC:	Caesar Wang <wxt@...k-chips.com>,
	Will Deacon <will.deacon@....com>,
	Marc Zyngier <marc.zyngier@....com>, huangtao@...k-chips.com,
	devicetree@...r.kernel.org, Xing Zheng <zhengxing@...k-chips.com>,
	Masahiro Yamada <yamada.masahiro@...ionext.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Brian Norris <briannorris@...omium.org>, dianders@...omium.org,
	linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
	Rob Herring <robh+dt@...nel.org>,
	David Wu <david.wu@...k-chips.com>, cf@...k-chips.com,
	Jianqun Xu <jay.xu@...k-chips.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 0/2] arm64: dts: rockchip: Support PMU for rk3399 SoCs

Hi,

On 2016年07月06日 19:24, Mark Rutland wrote:
> On Wed, Jul 06, 2016 at 04:05:55PM +0800, Caesar Wang wrote:
>> Hello Heiko, Marc & ARM guys
> Hi,
>
> These patches themselves look fine, so FWIW:
>
> Acked-by: Mark Rutland <mark.rutland@....com>

Thanks your ack.

>
> The prerequisite patch from Marc [1] also largely looks fine, but there
> are some minor details to sort out [2], so at this point in time I'm
> guesssing this is all v4.9 material.
>
> Thanks,
> Mark.
>
> [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-July/440647.html
> [2] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-July/441495.html

Okay, I saw the Marc's patch had been merged on next kernel.:-)

-Caesar
>
>> 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(-)
>>
>> -- 
>> 1.9.1
>>
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip

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