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From: Juraj Linkeš <juraj.linkes@pantheon.tech>
To: David Christensen <drc@linux.vnet.ibm.com>,
	Bruce Richardson <bruce.richardson@intel.com>
Cc: "thomas@monjalon.net" <thomas@monjalon.net>,
	"david.marchand@redhat.com" <david.marchand@redhat.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>,
	"dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v4] build: optional NUMA and cpu counts detection
Date: Wed, 21 Jul 2021 12:41:49 +0000
Message-ID: <5312a6eae817498dbe05df719ae5ca41@pantheon.tech> (raw)
In-Reply-To: <ce143540-3237-9ed3-ce2e-552590b42470@linux.vnet.ibm.com>

> >>> [However, we also would need to find out how BSD numbers the
> >>> domains, too, as it's possible an OS could just call them 0 and 1,
> >>> rather than
> >>> 0 and 8 if it wanted to.]
> >>>
> >>> In short, we'd need to test to be sure. Is FreeBSD on P9 a supported
> >>> config, and if so can the P9 maintainer perhaps help out with testing?
> >>
> >> Results of the v4 patch on an IBM AC922 P9 system with Linux:
> >>
> >
> > Can you get results from FreeBSD as well?
> 
> I can't help with FreeBSD here, I only have Linux on systems within IBM.
> 

This is an open question still then. I guess we'll have to go with sysctl -n vm.ndomains.

> >
> >> $ python3 get-numa-count.py
> >> 8
> >> NUMA node0 CPU(s):   0-63
> >> NUMA node8 CPU(s):   64-127
> > <snip>
> > Is this the right number for your case, i.e. are you able to use both numa nodes
> when RTE_MAX_NUMA_NODES=8?
> 
> node8 above is the ninth NUMA node so I'd need to use
> RTE_MAX_NUMA_NODES=9 as a minimum so that any arrays using that value
> are adequately sized.
> 
> Dave

Ok, the proper value to return is highest numa node + 1 then.

  reply	other threads:[~2021-07-21 12:41 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 [this message]
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
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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