On 21-08-31 07:54:16, Juraj Linkeš wrote: > > > > -----Original Message----- > > From: Piotr Kubaj > > Sent: Tuesday, August 31, 2021 2:55 AM > > To: Juraj Linkeš > > Cc: David Christensen ; 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; dev@dpdk.org > > Subject: Re: [PATCH v5] build: optional NUMA and cpu counts detection > > > > Hi, > > > > sorry for the late answer. > > Thanks for the answer anyway, better late than never. > > > > > I suppose you mean sysctl command, not systemctl. > > > > That's right. What does lscpu say? Are the NUMA nodes non-contiguous like this?: > 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): > > > On dual CPU systems, it returns 2. On single CPU ones, 1. > > I asked the previous question so that we know the actual numa node number of the second CPU. If it's 8, then sysctl does some renumeration and we can't use it. > > Bruce, maybe we should just parse lscpu output? That introduces a dependency, but that may not be such a big deal as lscpu is pretty common. There's no lscpu on FreeBSD in the base system. There is one in packages, but it's written only for amd64 / i386 since it uses CPUID. https://github.com/NanXiao/lscpu > > > > > 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? --