From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 09FF61E008B for ; Tue, 17 Jun 2025 07:55:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750146925; cv=none; b=Z1B/vWmpJT0opjW6NjwjFVoPJaZsVsH1g11IB6c5j+m4Raskfs7/bk2lM/gui7aa58XZw0diBsDpfdGkBe7yB/qPb6mdcr3eskr+ALuE4dt+M7xchgNBekzOovPl3Yzzk1+0TipAUtmqtoXTt4xo5x3TzdhpY5c9CQjefhPodeU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750146925; c=relaxed/simple; bh=Slv0MqFG9k/yFce9V5HOd2prSOog3k58GewruivTqvk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=cINT6LGvcYBWgnS3N9I4JpZUvYxaq/ozaCC2GPpY0gOqcI4ssG2hAZpg1/5OGqgd0ucKt4pq50bgTCYAuAdDRTIytDZuQrLb1mlb5fpiOZ1uOKda7A32UvvaudnfUJJKP7eYdzng8gbPE2z7MhjKjPIg9JaV5i9s9vfpykaaswQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Q23gB3VV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Q23gB3VV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D699BC4CEE3; Tue, 17 Jun 2025 07:55:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750146924; bh=Slv0MqFG9k/yFce9V5HOd2prSOog3k58GewruivTqvk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Q23gB3VVHcY32Xiqmh/lTpmENWNAKNEpfilapmC+8vwf4OGjIMIqY8AwU9tF+HSpg jB27SgaLTmY1h9Jw3cv4ZgMc0jKKOtkzQSOkhA3ZWg0NsMHu+oD0qeiuuiQyQgirhq wFjs4SchOkD0TW6htPXE8mBvYDtZ+p+cuy/aOKG8khlS96dQqM23SVNjUGQxUeiKFo uIbbsl1nMLiX56HKUzzmsa2YlcqW+rGxLI1YbFr7c8oV95NiHP15cRMsJb1CgdjL/l xkRqyznDVweOXFm3hQ9JI3tn2n//nM7TxzwhVLZ1a8IJqw7WlEg2XidnZStNFcF6JN k9FgAsmA7Z1mQ== Date: Tue, 17 Jun 2025 10:55:20 +0300 From: Leon Romanovsky To: K Prateek Nayak Cc: Steve Wahl , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , linux-kernel@vger.kernel.org, Vishal Chourasia , samir , Naman Jain , Saurabh Singh Sengar , srivatsa@csail.mit.edu, Michael Kelley , Russ Anderson , Dimitri Sivanich Subject: Re: [PATCH v4 1/2] sched/topology: improve topology_span_sane speed Message-ID: <20250617075520.GH750234@unreal> References: <4110e533-6cab-4845-bd11-11279ebc9150@app.fastmail.com> <20250611060607.GM10669@unreal> <20250612074157.GO10669@unreal> <5a673979-e96c-4dc2-b84b-849c6c8084ae@amd.com> <223b16a5-8532-4f5b-b34a-c7a0448f2454@amd.com> <20250615064207.GA750234@unreal> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Tue, Jun 17, 2025 at 08:34:53AM +0530, K Prateek Nayak wrote: > Hello Steve, <...> > Leon, could you also paste the output of numactl -H from within the > guest please. I'm wondering if the NUMA topology makes a difference > here somehow. [leonro@vm ~]$ sudo numactl -H available: 5 nodes (0-4) node 0 cpus: 0 1 node 0 size: 2927 MB node 0 free: 1603 MB node 1 cpus: 2 3 node 1 size: 3023 MB node 1 free: 3008 MB node 2 cpus: 4 5 node 2 size: 3023 MB node 2 free: 3007 MB node 3 cpus: 6 7 node 3 size: 3023 MB node 3 free: 3002 MB node 4 cpus: 8 9 node 4 size: 3022 MB node 4 free: 2718 MB node distances: node 0 1 2 3 4 0: 10 39 38 37 36 1: 39 10 38 37 36 2: 38 38 10 37 36 3: 37 37 37 10 36 4: 36 36 36 36 10 > > -- > Thanks and Regards, > Prateek >