From mboxrd@z Thu Jan 1 00:00:00 1970 From: Erich Focht Date: Mon, 08 Nov 2004 17:26:16 +0000 Subject: Re: removing mm->rss and mm->anon_rss from kernel? Message-Id: <200411081826.16550.efocht@hpce.nec.com> List-Id: References: <4189EC67.40601@yahoo.com.au> <200411081730.37906.efocht@hpce.nec.com> <20041108175710.72e76064.diegocg@teleline.es> In-Reply-To: <20041108175710.72e76064.diegocg@teleline.es> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: Diego Calleja Cc: clameter@sgi.com, mbligh@aracnet.com, nickpiggin@yahoo.com.au, benh@kernel.crashing.org, hugh@veritas.com, linux-mm@kvack.org, linux-ia64@vger.kernel.org On Monday 08 November 2004 17:57, Diego Calleja wrote: > El Mon, 8 Nov 2004 17:30:37 +0100 Erich Focht escri= bi=F3: >=20 > > You're talking about clusters, i.e. multiple running instances of the > > operating system. I don't think anybody really wants to go far beyond > > 512 nowadays. Application-wise 512 cpus/node isn't really needed (but >=20 > >=20 > SGI is already building one of 1024 CPUs according to some sources: > http://www.computerworld.com/hardwaretopics/hardware/story/0,10801,94564,= 00.html >=20 > but... >=20 > "Initially, Pennington said, the system will use two images of Linux -- o= ne > per 512 processors -- while it's being tested and configured. Later, all = 1,024 > processors will address one image of the SGI Advanced Linux operating sys= tem > being used." 1k is not really "far beyond" 512. I'm sure it's doable, but I doubt that this (or bigger machines) will spread too much. The progress in cluster interconnect technology and software is just too fast. Think of price/performance and stability (MTBF accumulation) and judge yourself. Sure, if Linux could survive breaking hardware, the story might change. > Also here -> > http://www.sgi.com/company_info/newsroom/press_releases/2004/november/jae= ri.html > it talks about another supercomputer of 2048 CPUs, but I don't find clear > if it's a cluster, or several images.=20 That was advertised to be a fraction of the Columbia machine, so a cluster of big machines. Erich