Gentoo Archives: gentoo-user

From: Michael <confabulate@××××××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Do I need NUMA set up in my kernel?
Date: Thu, 23 Sep 2021 18:21:04
Message-Id: 4137472.ejJDZkT8p0@lenovo.localdomain
In Reply to: Re: [gentoo-user] Do I need NUMA set up in my kernel? by Peter Humphrey
1 On Thursday, 23 September 2021 17:38:15 BST Peter Humphrey wrote:
2
3 > I've booted a kernel with no NUMA config, and it seems to run fine on this
4 > single-socket Ryzen motherboard. I just get the one entry in dmesg:
5 >
6 > $ dmesg | grep -i numa
7 > [ 0.297998] pci_bus 0000:00: on NUMA node 0
8 >
9 > That's it. I'm running five BOINC projects, some of which run on vbox, so on
10 > this motherboard it seems clear that I don't need NUMA.
11
12 Out of interest, have you tried booting a NUMA enabled kernel to see what
13 dmesg reports? On an old laptop, which definitely has only a single AMD APU,
14 I get:
15
16 $ dmesg | grep -i NUMA -A2
17 [ 0.002078] No NUMA configuration found
18 [ 0.002080] Faking a node at [mem 0x0000000000000000-0x000000042effffff]
19 [ 0.002085] NODE_DATA(0) allocated [mem 0x42effc000-0x42effffff]

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Re: [gentoo-user] Do I need NUMA set up in my kernel? Peter Humphrey <peter@××××××××××××.uk>