diff mbox series

[v2,4/4] arm64: dts: rockchip: Add further granularity in RK3588 CPU OPPs

Message ID 20240130-rk-dts-additions-v2-4-c6222c4c78df@gmail.com (mailing list archive)
State New, archived
Headers show
Series RK3588 and Rock 5B dts additions: thermal, OPP and fan | expand

Commit Message

Alexey Charkov Jan. 30, 2024, 6:21 p.m. UTC
This introduces additional OPPs that share the same voltage as
another OPP already present in the .dtsi but with lower frequency.

The idea is to try and limit system throughput more gradually upon
reaching the throttling condition for workloads that are close to
sustainable power already, thus avoiding needless performance loss.

My limited synthetic benchmarking [1] showed around 3.8% performance
benefit when these are in place, other things equal (not meant to
be comprehensive though).

[1] https://lore.kernel.org/linux-rockchip/CABjd4YxqarUCbZ-a2XLe3TWJ-qjphGkyq=wDnctnEhdoSdPPpw@mail.gmail.com/T/#me92aa0ee25e6eeb1d1501ce85f5af4e58b3b13c5

Signed-off-by: Alexey Charkov <alchark@gmail.com>
---
 arch/arm64/boot/dts/rockchip/rk3588s.dtsi | 87 +++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)

Comments

Dragan Simic Jan. 31, 2024, 5:08 a.m. UTC | #1
Hello Alexey,

On 2024-01-30 19:21, Alexey Charkov wrote:
> This introduces additional OPPs that share the same voltage as
> another OPP already present in the .dtsi but with lower frequency.
> 
> The idea is to try and limit system throughput more gradually upon
> reaching the throttling condition for workloads that are close to
> sustainable power already, thus avoiding needless performance loss.
> 
> My limited synthetic benchmarking [1] showed around 3.8% performance
> benefit when these are in place, other things equal (not meant to
> be comprehensive though).

I'm fine with this two-patch approach, so this important new feature
can be merged quicker, hopefully in the current merge window.  We can
add more OPPs later, after the additional testing is performed, of
course if all checks out as expected.

> [1] 
> https://lore.kernel.org/linux-rockchip/CABjd4YxqarUCbZ-a2XLe3TWJ-qjphGkyq=wDnctnEhdoSdPPpw@mail.gmail.com/T/#me92aa0ee25e6eeb1d1501ce85f5af4e58b3b13c5
> 
> Signed-off-by: Alexey Charkov <alchark@gmail.com>
> ---
>  arch/arm64/boot/dts/rockchip/rk3588s.dtsi | 87 
> +++++++++++++++++++++++++++++++
>  1 file changed, 87 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
> b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
> index af8b932a04c1..506676985a7e 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
> @@ -360,6 +360,21 @@ cluster0_opp_table: opp-table-cluster0 {
>  		compatible = "operating-points-v2";
>  		opp-shared;
> 
> +		opp-408000000 {
> +			opp-hz = /bits/ 64 <408000000>;
> +			opp-microvolt = <675000 675000 950000>;
> +			clock-latency-ns = <40000>;
> +		};
> +		opp-600000000 {
> +			opp-hz = /bits/ 64 <600000000>;
> +			opp-microvolt = <675000 675000 950000>;
> +			clock-latency-ns = <40000>;
> +		};
> +		opp-816000000 {
> +			opp-hz = /bits/ 64 <816000000>;
> +			opp-microvolt = <675000 675000 950000>;
> +			clock-latency-ns = <40000>;
> +		};
>  		opp-1008000000 {
>  			opp-hz = /bits/ 64 <1008000000>;
>  			opp-microvolt = <675000 675000 950000>;
> @@ -392,6 +407,27 @@ cluster1_opp_table: opp-table-cluster1 {
>  		compatible = "operating-points-v2";
>  		opp-shared;
> 
> +		opp-408000000 {
> +			opp-hz = /bits/ 64 <408000000>;
> +			opp-microvolt = <675000 675000 1000000>;
> +			clock-latency-ns = <40000>;
> +			opp-suspend;
> +		};
> +		opp-600000000 {
> +			opp-hz = /bits/ 64 <600000000>;
> +			opp-microvolt = <675000 675000 1000000>;
> +			clock-latency-ns = <40000>;
> +		};
> +		opp-816000000 {
> +			opp-hz = /bits/ 64 <816000000>;
> +			opp-microvolt = <675000 675000 1000000>;
> +			clock-latency-ns = <40000>;
> +		};
> +		opp-1008000000 {
> +			opp-hz = /bits/ 64 <1008000000>;
> +			opp-microvolt = <675000 675000 1000000>;
> +			clock-latency-ns = <40000>;
> +		};
>  		opp-1200000000 {
>  			opp-hz = /bits/ 64 <1200000000>;
>  			opp-microvolt = <675000 675000 1000000>;
> @@ -422,6 +458,21 @@ opp-2208000000 {
>  			opp-microvolt = <987500 987500 1000000>;
>  			clock-latency-ns = <40000>;
>  		};
> +		opp-2256000000 {
> +			opp-hz = /bits/ 64 <2256000000>;
> +			opp-microvolt = <1000000 1000000 1000000>;
> +			clock-latency-ns = <40000>;
> +		};
> +		opp-2304000000 {
> +			opp-hz = /bits/ 64 <2304000000>;
> +			opp-microvolt = <1000000 1000000 1000000>;
> +			clock-latency-ns = <40000>;
> +		};
> +		opp-2352000000 {
> +			opp-hz = /bits/ 64 <2352000000>;
> +			opp-microvolt = <1000000 1000000 1000000>;
> +			clock-latency-ns = <40000>;
> +		};
>  		opp-2400000000 {
>  			opp-hz = /bits/ 64 <2400000000>;
>  			opp-microvolt = <1000000 1000000 1000000>;
> @@ -433,6 +484,27 @@ cluster2_opp_table: opp-table-cluster2 {
>  		compatible = "operating-points-v2";
>  		opp-shared;
> 
> +		opp-408000000 {
> +			opp-hz = /bits/ 64 <408000000>;
> +			opp-microvolt = <675000 675000 1000000>;
> +			clock-latency-ns = <40000>;
> +			opp-suspend;
> +		};
> +		opp-600000000 {
> +			opp-hz = /bits/ 64 <600000000>;
> +			opp-microvolt = <675000 675000 1000000>;
> +			clock-latency-ns = <40000>;
> +		};
> +		opp-816000000 {
> +			opp-hz = /bits/ 64 <816000000>;
> +			opp-microvolt = <675000 675000 1000000>;
> +			clock-latency-ns = <40000>;
> +		};
> +		opp-1008000000 {
> +			opp-hz = /bits/ 64 <1008000000>;
> +			opp-microvolt = <675000 675000 1000000>;
> +			clock-latency-ns = <40000>;
> +		};
>  		opp-1200000000 {
>  			opp-hz = /bits/ 64 <1200000000>;
>  			opp-microvolt = <675000 675000 1000000>;
> @@ -463,6 +535,21 @@ opp-2208000000 {
>  			opp-microvolt = <987500 987500 1000000>;
>  			clock-latency-ns = <40000>;
>  		};
> +		opp-2256000000 {
> +			opp-hz = /bits/ 64 <2256000000>;
> +			opp-microvolt = <1000000 1000000 1000000>;
> +			clock-latency-ns = <40000>;
> +		};
> +		opp-2304000000 {
> +			opp-hz = /bits/ 64 <2304000000>;
> +			opp-microvolt = <1000000 1000000 1000000>;
> +			clock-latency-ns = <40000>;
> +		};
> +		opp-2352000000 {
> +			opp-hz = /bits/ 64 <2352000000>;
> +			opp-microvolt = <1000000 1000000 1000000>;
> +			clock-latency-ns = <40000>;
> +		};
>  		opp-2400000000 {
>  			opp-hz = /bits/ 64 <2400000000>;
>  			opp-microvolt = <1000000 1000000 1000000>;
Dragan Simic Feb. 8, 2024, 12:19 p.m. UTC | #2
Hello Alexey,

On 2024-01-31 06:08, Dragan Simic wrote:
> On 2024-01-30 19:21, Alexey Charkov wrote:
>> This introduces additional OPPs that share the same voltage as
>> another OPP already present in the .dtsi but with lower frequency.
>> 
>> The idea is to try and limit system throughput more gradually upon
>> reaching the throttling condition for workloads that are close to
>> sustainable power already, thus avoiding needless performance loss.
>> 
>> My limited synthetic benchmarking [1] showed around 3.8% performance
>> benefit when these are in place, other things equal (not meant to
>> be comprehensive though).
> 
> I'm fine with this two-patch approach, so this important new feature
> can be merged quicker, hopefully in the current merge window.  We can
> add more OPPs later, after the additional testing is performed, of
> course if all checks out as expected.

Thanks to Radxa providing a sample Rock 5B to me, I'll be able to
join the testing in the new few days, or maybe early next week.
Looking forward to the test results. :)

>> [1] 
>> https://lore.kernel.org/linux-rockchip/CABjd4YxqarUCbZ-a2XLe3TWJ-qjphGkyq=wDnctnEhdoSdPPpw@mail.gmail.com/T/#me92aa0ee25e6eeb1d1501ce85f5af4e58b3b13c5
>> 
>> Signed-off-by: Alexey Charkov <alchark@gmail.com>
>> ---
>>  arch/arm64/boot/dts/rockchip/rk3588s.dtsi | 87 
>> +++++++++++++++++++++++++++++++
>>  1 file changed, 87 insertions(+)
>> 
>> diff --git a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
>> b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
>> index af8b932a04c1..506676985a7e 100644
>> --- a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
>> +++ b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
>> @@ -360,6 +360,21 @@ cluster0_opp_table: opp-table-cluster0 {
>>  		compatible = "operating-points-v2";
>>  		opp-shared;
>> 
>> +		opp-408000000 {
>> +			opp-hz = /bits/ 64 <408000000>;
>> +			opp-microvolt = <675000 675000 950000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>> +		opp-600000000 {
>> +			opp-hz = /bits/ 64 <600000000>;
>> +			opp-microvolt = <675000 675000 950000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>> +		opp-816000000 {
>> +			opp-hz = /bits/ 64 <816000000>;
>> +			opp-microvolt = <675000 675000 950000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>>  		opp-1008000000 {
>>  			opp-hz = /bits/ 64 <1008000000>;
>>  			opp-microvolt = <675000 675000 950000>;
>> @@ -392,6 +407,27 @@ cluster1_opp_table: opp-table-cluster1 {
>>  		compatible = "operating-points-v2";
>>  		opp-shared;
>> 
>> +		opp-408000000 {
>> +			opp-hz = /bits/ 64 <408000000>;
>> +			opp-microvolt = <675000 675000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +			opp-suspend;
>> +		};
>> +		opp-600000000 {
>> +			opp-hz = /bits/ 64 <600000000>;
>> +			opp-microvolt = <675000 675000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>> +		opp-816000000 {
>> +			opp-hz = /bits/ 64 <816000000>;
>> +			opp-microvolt = <675000 675000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>> +		opp-1008000000 {
>> +			opp-hz = /bits/ 64 <1008000000>;
>> +			opp-microvolt = <675000 675000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>>  		opp-1200000000 {
>>  			opp-hz = /bits/ 64 <1200000000>;
>>  			opp-microvolt = <675000 675000 1000000>;
>> @@ -422,6 +458,21 @@ opp-2208000000 {
>>  			opp-microvolt = <987500 987500 1000000>;
>>  			clock-latency-ns = <40000>;
>>  		};
>> +		opp-2256000000 {
>> +			opp-hz = /bits/ 64 <2256000000>;
>> +			opp-microvolt = <1000000 1000000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>> +		opp-2304000000 {
>> +			opp-hz = /bits/ 64 <2304000000>;
>> +			opp-microvolt = <1000000 1000000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>> +		opp-2352000000 {
>> +			opp-hz = /bits/ 64 <2352000000>;
>> +			opp-microvolt = <1000000 1000000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>>  		opp-2400000000 {
>>  			opp-hz = /bits/ 64 <2400000000>;
>>  			opp-microvolt = <1000000 1000000 1000000>;
>> @@ -433,6 +484,27 @@ cluster2_opp_table: opp-table-cluster2 {
>>  		compatible = "operating-points-v2";
>>  		opp-shared;
>> 
>> +		opp-408000000 {
>> +			opp-hz = /bits/ 64 <408000000>;
>> +			opp-microvolt = <675000 675000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +			opp-suspend;
>> +		};
>> +		opp-600000000 {
>> +			opp-hz = /bits/ 64 <600000000>;
>> +			opp-microvolt = <675000 675000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>> +		opp-816000000 {
>> +			opp-hz = /bits/ 64 <816000000>;
>> +			opp-microvolt = <675000 675000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>> +		opp-1008000000 {
>> +			opp-hz = /bits/ 64 <1008000000>;
>> +			opp-microvolt = <675000 675000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>>  		opp-1200000000 {
>>  			opp-hz = /bits/ 64 <1200000000>;
>>  			opp-microvolt = <675000 675000 1000000>;
>> @@ -463,6 +535,21 @@ opp-2208000000 {
>>  			opp-microvolt = <987500 987500 1000000>;
>>  			clock-latency-ns = <40000>;
>>  		};
>> +		opp-2256000000 {
>> +			opp-hz = /bits/ 64 <2256000000>;
>> +			opp-microvolt = <1000000 1000000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>> +		opp-2304000000 {
>> +			opp-hz = /bits/ 64 <2304000000>;
>> +			opp-microvolt = <1000000 1000000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>> +		opp-2352000000 {
>> +			opp-hz = /bits/ 64 <2352000000>;
>> +			opp-microvolt = <1000000 1000000 1000000>;
>> +			clock-latency-ns = <40000>;
>> +		};
>>  		opp-2400000000 {
>>  			opp-hz = /bits/ 64 <2400000000>;
>>  			opp-microvolt = <1000000 1000000 1000000>;
> 
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
index af8b932a04c1..506676985a7e 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
@@ -360,6 +360,21 @@  cluster0_opp_table: opp-table-cluster0 {
 		compatible = "operating-points-v2";
 		opp-shared;
 
+		opp-408000000 {
+			opp-hz = /bits/ 64 <408000000>;
+			opp-microvolt = <675000 675000 950000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-600000000 {
+			opp-hz = /bits/ 64 <600000000>;
+			opp-microvolt = <675000 675000 950000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-816000000 {
+			opp-hz = /bits/ 64 <816000000>;
+			opp-microvolt = <675000 675000 950000>;
+			clock-latency-ns = <40000>;
+		};
 		opp-1008000000 {
 			opp-hz = /bits/ 64 <1008000000>;
 			opp-microvolt = <675000 675000 950000>;
@@ -392,6 +407,27 @@  cluster1_opp_table: opp-table-cluster1 {
 		compatible = "operating-points-v2";
 		opp-shared;
 
+		opp-408000000 {
+			opp-hz = /bits/ 64 <408000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+			opp-suspend;
+		};
+		opp-600000000 {
+			opp-hz = /bits/ 64 <600000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-816000000 {
+			opp-hz = /bits/ 64 <816000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-1008000000 {
+			opp-hz = /bits/ 64 <1008000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+		};
 		opp-1200000000 {
 			opp-hz = /bits/ 64 <1200000000>;
 			opp-microvolt = <675000 675000 1000000>;
@@ -422,6 +458,21 @@  opp-2208000000 {
 			opp-microvolt = <987500 987500 1000000>;
 			clock-latency-ns = <40000>;
 		};
+		opp-2256000000 {
+			opp-hz = /bits/ 64 <2256000000>;
+			opp-microvolt = <1000000 1000000 1000000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-2304000000 {
+			opp-hz = /bits/ 64 <2304000000>;
+			opp-microvolt = <1000000 1000000 1000000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-2352000000 {
+			opp-hz = /bits/ 64 <2352000000>;
+			opp-microvolt = <1000000 1000000 1000000>;
+			clock-latency-ns = <40000>;
+		};
 		opp-2400000000 {
 			opp-hz = /bits/ 64 <2400000000>;
 			opp-microvolt = <1000000 1000000 1000000>;
@@ -433,6 +484,27 @@  cluster2_opp_table: opp-table-cluster2 {
 		compatible = "operating-points-v2";
 		opp-shared;
 
+		opp-408000000 {
+			opp-hz = /bits/ 64 <408000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+			opp-suspend;
+		};
+		opp-600000000 {
+			opp-hz = /bits/ 64 <600000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-816000000 {
+			opp-hz = /bits/ 64 <816000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-1008000000 {
+			opp-hz = /bits/ 64 <1008000000>;
+			opp-microvolt = <675000 675000 1000000>;
+			clock-latency-ns = <40000>;
+		};
 		opp-1200000000 {
 			opp-hz = /bits/ 64 <1200000000>;
 			opp-microvolt = <675000 675000 1000000>;
@@ -463,6 +535,21 @@  opp-2208000000 {
 			opp-microvolt = <987500 987500 1000000>;
 			clock-latency-ns = <40000>;
 		};
+		opp-2256000000 {
+			opp-hz = /bits/ 64 <2256000000>;
+			opp-microvolt = <1000000 1000000 1000000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-2304000000 {
+			opp-hz = /bits/ 64 <2304000000>;
+			opp-microvolt = <1000000 1000000 1000000>;
+			clock-latency-ns = <40000>;
+		};
+		opp-2352000000 {
+			opp-hz = /bits/ 64 <2352000000>;
+			opp-microvolt = <1000000 1000000 1000000>;
+			clock-latency-ns = <40000>;
+		};
 		opp-2400000000 {
 			opp-hz = /bits/ 64 <2400000000>;
 			opp-microvolt = <1000000 1000000 1000000>;