[dpdk-users] Which coremask and "-n" (number of mem channels) should be used for a system with only "node1" (no "node0") and 2 sockets ?
stephen at networkplumber.org
Tue Aug 16 20:05:26 CEST 2016
On Tue, 16 Aug 2016 20:41:42 +0300
Kevin Wilson <wkevils at gmail.com> wrote:
> Thanks Metthew.
> Indeed, something seems broken in that machine,
> Invalid entry length (0). DMI table is broken! Stop
> On Mon, Jul 18, 2016 at 10:13 PM, Matthew Hall <mhall at mhcomputing.net> wrote:
> > On Fri, Jul 15, 2016 at 09:51:42AM +0300, Kevin Wilson wrote:
> >> Hello,
> >> I have a machine on which there is a bit non common setup: I have only
> >> "node1" (no node0) under /sys/devices/system/node:
> >> ls /sys/devices/system/node/
> >> ...
> >> node1
> >> ...
> > If I had to guess then either the BIOS is busted or the CPU is in the wrong
> > socket or the RAM is in the wrong socket.
> > Either way all bets are off how this is going to pan out. Probably badly when
> > it comes to getting the top performance.
> > Some exploration of the dmidecode output on the machine could be valuable.
> > Matthew.
What if you have a two socket machine, and node 0 is not populated?
Also does the kernel have NUMA support enabled?
Long ago there was a bug in DPDK where it got NUMA socket info from /proc/cpuinfo.
On some machines, the 'physical id' starts at 1 because value comes from BIOS.
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