From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe Subject: Re: Limited IOP/s on Dual Xeon KVM Host Date: Sun, 11 Nov 2012 13:04:58 +0100 Message-ID: <509F946A.7030004@profihost.ag> References: <509E0A65.1040903@profihost.ag> <509E5979.3070508@inktank.com> <509E5B57.1050004@profihost.ag> <509EC544.3030000@profihost.ag> <24E144B8C0207547AD09C467A8259F75577EFDD0@lisa.maurer-it.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.profihost.ag ([85.158.179.208]:33552 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751456Ab2KKME6 (ORCPT ); Sun, 11 Nov 2012 07:04:58 -0500 In-Reply-To: <24E144B8C0207547AD09C467A8259F75577EFDD0@lisa.maurer-it.com> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Dietmar Maurer Cc: Andrey Korolyov , Mark Nelson , "pve-devel@pve.proxmox.com" , "ceph-devel@vger.kernel.org" Am 11.11.2012 10:14, schrieb Dietmar Maurer: >> Got it fixed by Bios update... crazy. > > So you can't see any regression in IOPS with more cores? In this subject i wasn't talking about simply more cores in VM but about having a Dual Xeon instead of a Single Xeon as host. It seems Supermicro just had a bug in their X9 Dual Socket mainboard bios... > Can you speedup things with process pinning? > Just want to make sure that NUMA does not play any role here. Yes i still can speed up with pinning but this also applies to a Single Xeon. When i pin the fio process inside VM i get 18.000 instead of 15.000 iops. Greets, Stefan