From: Piotr Kubaj <pkubaj@anongoth.pl>
To: "Juraj Linkeš" <juraj.linkes@pantheon.tech>
Cc: David Christensen <drc@linux.vnet.ibm.com>,
"thomas@monjalon.net" <thomas@monjalon.net>,
"david.marchand@redhat.com" <david.marchand@redhat.com>,
"bruce.richardson@intel.com" <bruce.richardson@intel.com>,
"Honnappa.Nagarahalli@arm.com" <Honnappa.Nagarahalli@arm.com>,
"Ruifeng.Wang@arm.com" <Ruifeng.Wang@arm.com>,
"ferruh.yigit@intel.com" <ferruh.yigit@intel.com>,
"jerinjacobk@gmail.com" <jerinjacobk@gmail.com>,
"jerinj@marvell.com" <jerinj@marvell.com>,
"stephen@networkplumber.org" <stephen@networkplumber.org>,
"dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v5] build: optional NUMA and cpu counts detection
Date: Tue, 31 Aug 2021 02:54:38 +0200 [thread overview]
Message-ID: <YS19zhZhzq6V6VM1@KGPE-D16> (raw)
In-Reply-To: <93e6576242a24380b83d8ca82359c28e@pantheon.tech>
[-- Attachment #1: Type: text/plain, Size: 2541 bytes --]
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 <drc@linux.vnet.ibm.com>
> > Sent: Tuesday, August 3, 2021 1:29 AM
> > To: Juraj Linkeš <juraj.linkes@pantheon.tech>; 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 <pkubaj@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?
next prev parent reply other threads:[~2021-08-31 8:02 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-20 12:55 [dpdk-dev] [PATCH v1 1/1] " Juraj Linkeš
2020-12-23 11:32 ` Juraj Linkeš
2021-03-31 9:06 ` [dpdk-dev] [PATCH v2] " Juraj Linkeš
2021-03-31 19:07 ` David Christensen
2021-04-16 12:43 ` Juraj Linkeš
2021-04-19 10:18 ` [dpdk-dev] [PATCH v3] " Juraj Linkeš
2021-04-28 19:33 ` David Christensen
2021-06-29 10:55 ` [dpdk-dev] [PATCH v4] " Juraj Linkeš
2021-06-29 11:28 ` Bruce Richardson
2021-07-06 8:56 ` Juraj Linkeš
2021-07-06 9:08 ` Bruce Richardson
2021-07-06 18:10 ` David Christensen
2021-07-16 13:53 ` Juraj Linkeš
2021-07-16 14:24 ` Bruce Richardson
2021-07-20 20:49 ` David Christensen
2021-07-21 12:41 ` Juraj Linkeš
2021-06-29 18:00 ` Stephen Hemminger
2021-07-21 13:04 ` [dpdk-dev] [PATCH v5] " Juraj Linkeš
2021-08-02 12:44 ` Juraj Linkeš
2021-08-02 23:29 ` David Christensen
2021-08-03 10:21 ` Juraj Linkeš
2021-08-31 0:54 ` Piotr Kubaj [this message]
2021-08-31 7:54 ` Juraj Linkeš
2021-08-31 8:02 ` Bruce Richardson
2021-09-09 7:20 ` Juraj Linkeš
2021-09-09 8:01 ` Bruce Richardson
2021-09-09 8:08 ` Thomas Monjalon
2021-09-09 8:42 ` Juraj Linkeš
2021-09-09 16:44 ` David Christensen
2021-08-31 12:32 ` Piotr Kubaj
2021-08-17 10:45 ` [dpdk-dev] [PATCH v6] " Juraj Linkeš
2021-09-16 7:46 ` Thomas Monjalon
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