From: Russ Anderson <rja@sgi.com>
To: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Tejun Heo <tj@kernel.org>, Linux MM <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] memblock, numa: Binary search node id
Date: Thu, 15 Aug 2013 16:37:34 -0500 [thread overview]
Message-ID: <20130815213734.GA28658@sgi.com> (raw)
In-Reply-To: <CAE9FiQUyGpmMP0VPE5ZrvDMLB-sdb0DzajGvB_KDt-ZnoJZhPg@mail.gmail.com>
On Thu, Aug 15, 2013 at 02:06:44PM -0700, Yinghai Lu wrote:
> On Thu, Aug 15, 2013 at 1:43 PM, Andrew Morton
> <akpm@linux-foundation.org> wrote:
> > On Wed, 14 Aug 2013 22:46:29 -0700 Yinghai Lu <yinghai@kernel.org> wrote:
> >
> >> Current early_pfn_to_nid() on arch that support memblock go
> >> over memblock.memory one by one, so will take too many try
> >> near the end.
> >>
> >> We can use existing memblock_search to find the node id for
> >> given pfn, that could save some time on bigger system that
> >> have many entries memblock.memory array.
> >
> > Looks nice. I wonder how much difference it makes.
>
> Russ said he would test on his 256 nodes system, but looks he never
> got chance.
I reserved time tonight on a couple big systems to measure
the performance difference.
Thanks,
--
Russ Anderson, OS RAS/Partitioning Project Lead
SGI - Silicon Graphics Inc rja@sgi.com
WARNING: multiple messages have this Message-ID (diff)
From: Russ Anderson <rja@sgi.com>
To: Yinghai Lu <yinghai@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Tejun Heo <tj@kernel.org>, Linux MM <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] memblock, numa: Binary search node id
Date: Thu, 15 Aug 2013 16:37:34 -0500 [thread overview]
Message-ID: <20130815213734.GA28658@sgi.com> (raw)
In-Reply-To: <CAE9FiQUyGpmMP0VPE5ZrvDMLB-sdb0DzajGvB_KDt-ZnoJZhPg@mail.gmail.com>
On Thu, Aug 15, 2013 at 02:06:44PM -0700, Yinghai Lu wrote:
> On Thu, Aug 15, 2013 at 1:43 PM, Andrew Morton
> <akpm@linux-foundation.org> wrote:
> > On Wed, 14 Aug 2013 22:46:29 -0700 Yinghai Lu <yinghai@kernel.org> wrote:
> >
> >> Current early_pfn_to_nid() on arch that support memblock go
> >> over memblock.memory one by one, so will take too many try
> >> near the end.
> >>
> >> We can use existing memblock_search to find the node id for
> >> given pfn, that could save some time on bigger system that
> >> have many entries memblock.memory array.
> >
> > Looks nice. I wonder how much difference it makes.
>
> Russ said he would test on his 256 nodes system, but looks he never
> got chance.
I reserved time tonight on a couple big systems to measure
the performance difference.
Thanks,
--
Russ Anderson, OS RAS/Partitioning Project Lead
SGI - Silicon Graphics Inc rja@sgi.com
--
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next prev parent reply other threads:[~2013-08-15 21:37 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-15 5:46 [PATCH] memblock, numa: Binary search node id Yinghai Lu
2013-08-15 5:46 ` Yinghai Lu
2013-08-15 20:43 ` Andrew Morton
2013-08-15 20:43 ` Andrew Morton
2013-08-15 21:06 ` Yinghai Lu
2013-08-15 21:06 ` Yinghai Lu
2013-08-15 21:37 ` Russ Anderson [this message]
2013-08-15 21:37 ` Russ Anderson
2013-08-16 19:01 ` Russ Anderson
2013-08-16 19:01 ` Russ Anderson
2013-08-16 19:15 ` Yinghai Lu
2013-08-16 19:15 ` Yinghai Lu
2013-08-16 19:31 ` Russ Anderson
2013-08-16 19:31 ` Russ Anderson
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