From mboxrd@z Thu Jan 1 00:00:00 1970 From: Qingshu Chen Subject: How virtio-blk latency can be measured Date: Sun, 15 Dec 2013 16:06:27 +0800 Message-ID: <1387094787.18543.9.camel@debian.debian.ipads.com> Mime-Version: 1.0 Content-Type: text/plain; charset="GB2312" Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org Return-path: Received: from mail-pa0-f48.google.com ([209.85.220.48]:42917 "EHLO mail-pa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751106Ab3LOIFW (ORCPT ); Sun, 15 Dec 2013 03:05:22 -0500 Received: by mail-pa0-f48.google.com with SMTP id rd3so1686558pab.35 for ; Sun, 15 Dec 2013 00:05:22 -0800 (PST) Received: from [192.168.11.223] ([202.120.40.85]) by mx.google.com with ESMTPSA id sg1sm17347181pbb.16.2013.12.15.00.05.20 for (version=SSLv3 cipher=RC4-SHA bits=128/128); Sun, 15 Dec 2013 00:05:21 -0800 (PST) Sender: kvm-owner@vger.kernel.org List-ID: hi,I want to calculate the latencyof virtio in kvm, I read the document in http://www.linux-kvm.org/page/Virtio/Block/Latency and met some problem. 1. when calculating latency in kvm, the document said kvm_pio and kvm_set_irq can be filtered using command 'lspci -vv -nn' and 'cat /proc/interrupts' , but I don't know how to use the result to filter kvm_pio and kvm_set_irq. 2. Anyone know who is the author of this webpage: http://www.linux-kvm.org/page/Virtio/Block/Latency . Thank you.