From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chia-Hung Lin Subject: a question about the numa information on my machine Date: Wed, 22 Jun 2011 14:13:13 +0800 Message-ID: References: Mime-Version: 1.0 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type:content-transfer-encoding; bh=BxHoZZ6LFuT9Ycccqq4gxpkItNIz/WlNiJ5iRVsP45A=; b=tW1dD1y0zQJafSeIOaLMoLrr4KHWFAsJ/MUb0VZVi6H9afY289yLdP6Y8NS9oblH2H GJ37UOhRaXcVRdmMskXskaeYfKVT3E5pKRQMXI+VVmoXhSOFSbCJIBUebdpo79jzf3ei bP2ENgVaCtQkyug1WTuwNJJtLF5G+erGMw3lk= In-Reply-To: Sender: linux-numa-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="iso-8859-1" To: linux-numa@vger.kernel.org Hi, I don't know if this post is appropriately for this board. (If not, which forum should I post to?) =A0 I am wondering if my machine is configured right. =A0 =A0My machine equipped with two Intel Xeon =A0E5640 CPUs (each has = 4 cores). =A0 =A0The red hat version is Red Hat Enterprise 5.5 and linux kernel i= s 2.6.18-194.el5 =A0 =A0My question is when I check /sys/devices/system/node, there is o= nly one=A0node0 directory. =A0 =A0The information displayed by "numactl --show" is policy: default preferred node: current physcpubind: 0 1 2 3 4 5 6 7 cpubind: 0 nodebind: 0 membind: 0 =A0 =A0Why there is only one node instead of two? Is there any thing wr= ong with=A0my machine? =A0 =A0Also, I found a message in dmesg : No NUMA configuration found =46aking a node at 0000000000000000-0000000318000000 =A0 =A0What should be a NUMA configuration look like? =A0 =A0Another thing I think strange is the BIOS setting. Its default i= s SMP. =A0 =A0When I try to change it to NUMA, I can only see one CPU after=A0= re-booting. =A0 =A0Is it normal? (the machine model is Dell T5500) =A0 =A0It will be very helpful if you can give me some direction. =A0 =A0Thanks a lot. David Lin