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Bottomley" , "Martin K. Petersen" , Peter Wang , Manivannan Sadhasivam , Andy Gross , Bjorn Andersson , Konrad Dybcio , Matthias Brugger , AngeloGioacchino Del Regno , CC: Alim Akhtar , Avri Altman , Bart Van Assche , , , , , , , Subject: [PATCH V2 0/3] Add CPU latency QoS support for ufs driver Date: Mon, 4 Dec 2023 20:00:58 +0530 Message-ID: <20231204143101.64163-1-quic_mnaresh@quicinc.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: f7xWZ5ltK3HEdBw-zw5Ace9q9ybTauM4 X-Proofpoint-ORIG-GUID: f7xWZ5ltK3HEdBw-zw5Ace9q9ybTauM4 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-04_13,2023-12-04_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 clxscore=1011 malwarescore=0 bulkscore=0 phishscore=0 mlxlogscore=782 impostorscore=0 adultscore=0 suspectscore=0 priorityscore=1501 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2312040108 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231204_063144_835499_66AD8099 X-CRM114-Status: GOOD ( 16.47 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Add CPU latency QoS support for ufs driver. This improves random io performance by 15% for ufs. tiotest benchmark tool io performance results on sm8550 platform: 1. Without PM QoS support Type (Speed in) | Average of 18 iterations Random Read(IPOS) | 37101.3 Random Write(IPOS) | 41065.13 2. With PM QoS support Type (Speed in) | Average of 18 iterations Random Read(IPOS) | 42943.4 Random Write(IPOS) | 46784.9 (Improvement % with PM QoS = ~15%). This patch is based on below patch by Stanley Chu [1]. Moving the PM QoS code to ufshcd.c and making it generic. [1] https://lore.kernel.org/r/20220623035052.18802-8-stanley.chu@mediatek.com Changes from v1: - Addressed bvanassche comments to have the code in core ufshcd - Design is changed from per-device PM QoS to CPU latency QoS based support - Reverted existing PM QoS feature from MEDIATEK UFS driver - Added PM QoS capability for both QCOM and MEDIATEK SoCs Maramaina Naresh (3): ufs: core: Add CPU latency QoS support for ufs driver ufs: ufs-mediatek: Enable CPU latency PM QoS support for MEDIATEK SoC ufs: ufs-qcom: Enable CPU latency QoS support for QCOM SoC drivers/ufs/core/ufshcd-priv.h | 8 +++++ drivers/ufs/core/ufshcd.c | 62 +++++++++++++++++++++++++++++++++ drivers/ufs/host/ufs-mediatek.c | 20 ++--------- drivers/ufs/host/ufs-mediatek.h | 3 -- drivers/ufs/host/ufs-qcom.c | 1 + include/ufs/ufshcd.h | 16 +++++++++ 6 files changed, 90 insertions(+), 20 deletions(-)