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([2a00:f41:9028:9df3:4fb7:492b:2c94:7283]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-2ec05c0605bsm17294671fa.47.2024.06.18.07.39.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 18 Jun 2024 07:39:12 -0700 (PDT) Message-ID: <7395f6ca-31d7-4ebc-b846-6c68e2ae2efe@linaro.org> Date: Tue, 18 Jun 2024 16:39:06 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/4] arm64: dts: qcom: x1e80100: Enable bwmon and fastrpc support To: Sibi Sankar , andersson@kernel.org, djakov@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, srinivas.kandagatla@linaro.org Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-pm@vger.kernel.org, quic_rgottimu@quicinc.com, quic_kshivnan@quicinc.com, conor+dt@kernel.org, dmitry.baryshkov@linaro.org, abel.vesa@linaro.org References: <20240604011157.2358019-1-quic_sibis@quicinc.com> <24d2d3b3-d676-8e86-bae4-c3538b7b9981@quicinc.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <24d2d3b3-d676-8e86-bae4-c3538b7b9981@quicinc.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 6/13/24 19:27, Sibi Sankar wrote: > > > On 6/6/24 16:00, Konrad Dybcio wrote: >> On 4.06.2024 3:11 AM, Sibi Sankar wrote: >>> This patch series enables bwmon and fastrpc support on X1E80100 SoCs. >>> >>> This series applies on: >>> next-20240603 + https://lore.kernel.org/lkml/20240603205859.2212225-1-quic_sibis@quicinc.com/ >>> >> >> Going back to [1], is memlat-over-scmi not enough to give us good numbers >> without OS intervention? Does probing bwmon and making some decisions in >> Linux actually help here? > > Memlat and bwmon are meant to cover to different use cases. Though > they have a big overlap on when they get triggered bwmon is specifically > meant to address cases where band-width aggregation is required (meaning > if other peripherals already have a avg bw vote on active LLCC/DDR, the > vote from bwmon would be an additional request on top of that). However > to make use of this we should vote for avg-kbps in addition to peak from > icc-bwmon driver which we don't currently do (Shiv was planning on > sending a fix for it). Great, thanks for confirming Konrad