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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2c7f5ac7c9asm82317545ad.4.2026.06.28.19.16.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 28 Jun 2026 19:16:13 -0700 (PDT) Message-ID: Date: Mon, 29 Jun 2026 10:16:10 +0800 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH ath-next] wifi: ath12k: change MAC buffer ring size to 4096 To: Yingying Tang , ath12k@lists.infradead.org Cc: linux-wireless@vger.kernel.org, yintang@qti.qualcomm.com References: <20260610031358.2043716-1-yingying.tang@oss.qualcomm.com> From: Baochen Qiang Content-Language: en-US In-Reply-To: <20260610031358.2043716-1-yingying.tang@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: eYX7l3Pk5riSY9LGOP8Lvka-F0SeeplU X-Proofpoint-Spam-Info: AW1haW4tMjYwNjI5MDAxNyBTYWx0ZWRfX/glnS04f96L+ kgdl18RUmG6A7vIoCAmk+MDaedzI8b9Ax68l8l3Wsvq4/CkpxYIRkV/99jlUf6YfRASCrOaVwu9 z/Qdk35WVeQMHOSNCKVtDTgf3nUxYeE= X-Proofpoint-GUID: eYX7l3Pk5riSY9LGOP8Lvka-F0SeeplU X-Authority-Analysis: v=2.4 cv=SuugLvO0 c=1 sm=1 tr=0 ts=6a41d56e cx=c_pps a=rz3CxIlbcmazkYymdCej/Q==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=EUspDBNiAAAA:8 a=7Sa7iVnaTNRCtE9djW8A:9 a=QEXdDO2ut3YA:10 a=bFCP_H2QrGi7Okbo017w:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjI5MDAxNyBTYWx0ZWRfX6ni6Ot2UUMtT rlvkHcmMGYpOAgMpjtf0JXnViL9rZcPvljJaajOJ02zpVvOIxQ81j7F6hEvi6XAFdrOkyLWRPRy YgizG1SBWZRzTeaIFVfpEjU78zhzshNq11LJhV4p2Ioy48waWsMj9APb7r3aaGoJ5fQjUbAe1kx B+fWcC1PDeZdZck1Gj7gd4lkD8PP9r9IgOTuukI6ULlV/6cnkjoBtEVso2QIgi0/rGkV0DfdllH BHSMBAWa+9YNf9PCEknMJgHpRduK26Lug7JquT6DpWrLAp2TMhDhP0sSotzdmjCt3K1aAYzKKCz R2mkO9zXtDbcSs5LGMG9H4KWGOPMyaxHL13RBDGAe/bF+A3wxHZVob8GIBuDQ/vY+mBU04Ih5G/ vyHjXRf7iXwnh79nJVLUarKtwAMSLp7eivtMKqlPjQsYE9EFugHj6x10IUCOXgswJBjL0SPFKie /PPkIhmRYHhNKLCPo6Q== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-28_06,2026-06-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 adultscore=0 priorityscore=1501 clxscore=1015 phishscore=0 bulkscore=0 impostorscore=0 suspectscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606290017 On 6/10/2026 11:13 AM, Yingying Tang wrote: > For WCN7850, MAC buffer ring size is updated to 2048 in > 955df16f2a4c3 ("wifi: ath12k: change MAC buffer ring size to 2048") > to increase peak throughput. > > But during the RX process, a phenomenon can still be observed where > the throughput drops by about 30% from its peak value and then recovers, > and this behavior repeats during RX. > > After increasing MAC buffer ring size to 4096, the data rate drop has > gone. > > Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3 > > Signed-off-by: Yingying Tang Reviewed-by: Baochen Qiang