linux-kernel - Re: [PATCH v4 1/2] sched/topology: improve topology_span

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250617075520.GH750234@unreal>
Date: Tue, 17 Jun 2025 10:55:20 +0300
From: Leon Romanovsky <leon@...nel.org>
To: K Prateek Nayak <kprateek.nayak@....com>
Cc: Steve Wahl <steve.wahl@....com>, Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Juri Lelli <juri.lelli@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
	Valentin Schneider <vschneid@...hat.com>,
	linux-kernel@...r.kernel.org,
	Vishal Chourasia <vishalc@...ux.ibm.com>,
	samir <samir@...ux.ibm.com>,
	Naman Jain <namjain@...ux.microsoft.com>,
	Saurabh Singh Sengar <ssengar@...ux.microsoft.com>,
	srivatsa@...il.mit.edu, Michael Kelley <mhklinux@...look.com>,
	Russ Anderson <rja@....com>, Dimitri Sivanich <sivanich@....com>
Subject: Re: [PATCH v4 1/2] sched/topology: improve topology_span_sane speed

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
>