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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: eMfG7hgs4n8+Vr+ge0XL7CvbnylnloX0cKjcZytDTzIGCTerwzBlh/Y3s1NAOo6+buIbD82zd5kiaeMrtkRqmw+4kHP+RXivSAu996tyIjlIVWQ2wOpEJS0QKJOCb8wFSdTW1YVfGDjGmqyXXad9fnXmm2FYl+bPnX09hUuX1qivyBZBOz+M7qeFrWUaWD90QUVTo0wEvv1onBCS0Rb4k4aeZ7z6JkLYxTVOTJmc24SXz2xt0A0EnKzv8anDcuLyhLcpwEZIbl/lgZ1oQbpVAE/oXfvq+n4GZiqifUzLvSCY1CMThDoe6utnUHEEyCMLul5VRaCr44ZYfsKGSm/QvSXYSvZiiIlZ/WLcy9uzT70s1aMo3kMlIC0XrsIGy3C8eghk1Z9HKsiYJOjKS6yVQRInymX+Cie//SxE0KaYetNmi/fdxwjINAYCCT5Hxjqr X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Aug 2026 16:35:13.0610 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 848756fb-c0e7-4ac6-c261-08defc7d82f3 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00003AE4.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB9179 Hello Szabina, On 8/17/2026 9:35 PM, Szabina Korbai wrote: > Hello Peter, > > We ran the same benchmarks (schbench, sysbench, hackbench) as Shubhang > has on s390 on an LPAR running fedora 43 with 32 vCPUs. > > We ran the benchmarks for each of the cgroup modes, and for the > baseline, we chose the commit prior to the patches (f666241e6bd5 - > sched/fair: Unify cfs_rq throttling via account_cfs_rq_runtime() ). > > We have also tried running stress-ng in parallel with the benchmarks > (set to generate 50% or 90% utilization for each vCPU). > > Compared to simply running the benchmarks on their own, this has > revealed some performance trade-offs that the move to a single runqueue > can introduce. Are you using tip:sched/core at commit 68e3748781 ("sched/fair: Fix flat hierarchy") for the flat_cg numbers or did you checkout at 85570f10a4c6 ("sched/eevdf: Move to a single runqueue")? There are a couple fixes for vruntime update and Vincent's optimizations for preemption bits which might make a difference to the overall results. -- Thanks and Regards, Prateek