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 > > Sent: Tuesday, August 3, 2021 1:29 AM > > To: Juraj Linkeš ; thomas@monjalon.net; > > david.marchand@redhat.com; bruce.richardson@intel.com; > > Honnappa.Nagarahalli@arm.com; Ruifeng.Wang@arm.com; > > ferruh.yigit@intel.com; jerinjacobk@gmail.com; jerinj@marvell.com; > > stephen@networkplumber.org; Piotr Kubaj > > 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?