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Mon, 12 Oct 2026 14:14:33 +0000 (GMT) Received: from [9.124.214.197] (unknown [9.124.214.197]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 12 Oct 2026 14:14:33 +0000 (GMT) Message-ID: Date: Mon, 12 Oct 2026 19:44:32 +0530 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] powerpc/topology: Introduce llc_override debugfs To: Srikar Dronamraju Cc: maddy@linux.ibm.com, linuxppc-dev@lists.ozlabs.org, peterz@infradead.org, tim.c.chen@linux.intel.com, christophe.leroy@csgroup.eu, linux-kernel@vger.kernel.org, ritesh.list@gmail.com, kprateek.nayak@amd.com, yu.c.chen@intel.com, vineethr@linux.ibm.com, vincent.guittot@linaro.org, npiggin@gmail.com, mpe@ellerman.id.au References: <20261012102037.2477378-1-sshegde@linux.ibm.com> Content-Language: en-US From: Shrikanth Hegde In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-GUID: yPdxMBPrbcYv-xVpP5DYG2SaviyOF7R0 X-Proofpoint-ORIG-GUID: KEof3A7tF05NuSUDuOscKlfq1zk3eMJA X-Authority-Analysis: v=2.4 cv=aqInmiZV c=1 sm=1 tr=0 ts=6acceb51 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=jaEAVqPHSARQqII2670A:9 a=QEXdDO2ut3YA:10 a=ZXulRonScM0A:10 a=zZCYzV9kfG8A:10 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDEyMDA1NiBTYWx0ZWRfXzFwW0OkYCtXA XWBJw8zU9SXsRUaYuaon8JRp+wiXx7pNnhkYzl4v0+DLWrRASsWdVtr46qg6BdSqvv0gXyh2xdW 2EvSN4UC6/OpKy3xr7DFc8vd6yBBn+w= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDEyMDA1NiBTYWx0ZWRfX54YNnjNeMuvS cD8is9WWS4DM41RT3+p5b7QgtsqJDMwmzvRPE65xeOmE5Ez3zxU09PYILNz9r3cijrxPhu5fE63 +xotzyo1BpQ+xXmdmJC5PlT0Zf/AIuSVth9yjpnmRFGARSStIin+h5ymGdiu7O9hymauEYDm8Yg /XdCqLrEEKd6i11P1qvWSwb4FBRep6XZuo+ZhdniGUVvoRNPt/+fgsQx0OrGf1a3Sp7Ide3GWKU wG8MggQ/kNbodePgu6qKzD1jaAhjB0YFK+FtThwX/VFxJzKEqKGrZY1zgABG1UQ4uXY4utAMQIg uE3sRy+HbXY5nm/x2mPKBWTuE7S93JHSNSrchtHLrKRaWSWu6lGiOQpHJxE7I6v2CZhh1aLPOW8 SMIayCy2tU8awO1ntoWLvAQK1AfHfMSXZbXTfjmPW0Zy9AuSqITvifAFnln19NLOTdm82wJnsby d42PTB1vEPhgqv15PnQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-12_04,2026-10-09_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 clxscore=1015 spamscore=0 malwarescore=0 suspectscore=0 bulkscore=0 adultscore=0 impostorscore=0 priorityscore=1501 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610080000 definitions=main-2610120056 On 10/12/26 5:49 PM, Srikar Dronamraju wrote: > * Shrikanth Hegde [2026-10-12 15:50:33]: > > > Hi Shrikanth, > >> There is a new feature in scheduler called as Cache Aware Scheduling [1]. >> It tries to keep related tasks within the same LLC domain while >> keeping the system reasonably balanced. >> >> Cache Aware Scheduling assumes that the scheduler LLC domain is large enough >> to be a useful placement target. This is true on many systems where an LLC spans >> several cores, but not on PowerPC systems where the scheduler-visible LLC is at >> the SMT level. In that case, sd_llc_size is effectively the SMT width. >> > > Can we add a reference to the earlier attempt to try MCLLC a few years back. > Ah yes. will add it. It is this one. https://lore.kernel.org/all/1617341874-1205-1-git-send-email-ego@linux.vnet.ibm.com/ But I couldn't find an email id of Gautham which won't bounce. Based on what i know :)