Hi,
sorry for the late answer.
I suppose you mean sysctl command, not systemctl.
On dual CPU systems, it returns 2. On single CPU ones, 1.
On 21-08-03 10:21:50, Juraj Linkeš wrote:
>
>
> > -----Original Message-----
> > From: David Christensen <d...@linux.vnet.ibm.com>
> > Sent: Tuesday, August 3, 2021 1:29 AM
> > To: Juraj Linkeš <juraj.lin...@pantheon.tech>; tho...@monjalon.net;
> > david.march...@redhat.com; bruce.richard...@intel.com;
> > honnappa.nagaraha...@arm.com; ruifeng.w...@arm.com;
> > ferruh.yi...@intel.com; jerinjac...@gmail.com; jer...@marvell.com;
> > step...@networkplumber.org; Piotr Kubaj <pku...@freebsd.org>
> > Cc: dev@dpdk.org
> > Subject: Re: [PATCH v5] build: optional NUMA and cpu counts detection
> >
> >
> >
> > On 8/2/21 5:44 AM, Juraj Linkeš wrote:
> > >> +if os.name == 'posix':
> > >> + if os.path.isdir('/sys/devices/system/node'):
> > >> + numa_nodes = glob.glob('/sys/devices/system/node/node*')
> > >> + numa_nodes.sort()
> > >> + print(int(os.path.basename(numa_nodes[-1])[4:]) + 1)
> > >> + else:
> > >> + subprocess.run(['sysctl', '-n', 'vm.ndomains'], check=False)
> > >> +
> > >
> > > Bruce, David, Thomas,
> > >
> > > Is DPDK actually supported on Power9 FreeBSD? Is anyone using this
> > combination? How can we address the open question of what exactly does
> > sysctl -n vm.ndomains return on a Power9 FreeBSD system? Or should we just
> > leave it as is? Or maybe add 1 to the output (as we do in other cases)?
> >
> > Not supported within IBM, but you can buy OpenPOWER boxes from 3rd parties
> > such as Raptor Computing Systems so there may be customers using DPDK on
> > POWER with FreeBSD that I don't track. Adding Piotr Kubaj who has commented
> > on POWER/FreeBSD issues in this past.
> >
> > Dave
>
> Thanks, David.
>
> Piotr, to provide more context, we're trying to figure out what the highest
> NUMA node on a system is.
> On P9 systems, here's how NUMA nodes look like in Linux:
> NUMA node0 CPU(s): 0-63
> NUMA node8 CPU(s): 64-127
> NUMA node252 CPU(s):
> NUMA node253 CPU(s):
> NUMA node254 CPU(s):
> NUMA node255 CPU(s):
> The highest NUMA with CPUs is node8.
>
> We're trying to get the highest NUMA with CPUs on P9 FreeBSD systems, but we
> don't know whether FreeBSD NUMA layout looks the same (does FreeBSD report
> non-contiguous NUMA nodes as Linxu above, or does it renumerate) a what does
> "systemctl -n vm.ndomains" return. Could you check these for us?
