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Date: Thu, 21 Jan 2021 18:21:32 +0000 From: Valentin Schneider <valentin.schneider@....com> To: Meelis Roos <mroos@...ux.ee>, LKML <linux-kernel@...r.kernel.org> Cc: Peter Zijlstra <peterz@...radead.org>, Vincent Guittot <vincent.guittot@...aro.org>, Barry Song <song.bao.hua@...ilicon.com>, Mel Gorman <mgorman@...e.de>, Dietmar Eggemann <dietmar.eggemann@....com> Subject: Re: 5.11-rc4+git: Shortest NUMA path spans too many nodes On 21/01/21 19:39, Meelis Roos wrote: >> Could you paste the output of the below? >> >> $ cat /sys/devices/system/node/node*/distance > > 10 12 12 14 14 14 14 16 > 12 10 14 12 14 14 12 14 > 12 14 10 14 12 12 14 14 > 14 12 14 10 12 12 14 14 > 14 14 12 12 10 14 12 14 > 14 14 12 12 14 10 14 12 > 14 12 14 14 12 14 10 12 > 16 14 14 14 14 12 12 10 > Thanks! > >> Additionally, booting your system with CONFIG_SCHED_DEBUG=y and >> appending 'sched_debug' to your cmdline should yield some extra data. > > [ 0.000000] Linux version 5.11.0-rc4-00015-g45dfb8a5659a (mroos@...00m2) (gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1) #55 SMP Thu Jan 21 19:23:10 EET 2021 > [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.11.0-rc4-00015-g45dfb8a5659a root=/dev/sda1 ro quiet This is missing 'sched_debug' to get the extra topology debug prints (yes it needs an extra cmdline argument on top of having CONFIG_SCHED_DEBUG=y), but I should be able to generate those locally by feeding QEMU the above distance table.
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