From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752610Ab2BTK1t (ORCPT ); Mon, 20 Feb 2012 05:27:49 -0500 Received: from e23smtp02.au.ibm.com ([202.81.31.144]:55775 "EHLO e23smtp02.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752364Ab2BTK1s (ORCPT ); Mon, 20 Feb 2012 05:27:48 -0500 Message-ID: <4F42201D.4080807@linux.vnet.ibm.com> Date: Mon, 20 Feb 2012 18:27:41 +0800 From: Xiao Guangrong User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: Pradeep Kumar Surisetty CC: LKML , KVM Subject: Re: KVM: perf: a smart tool to analyse kvm events References: <20120216155248.6865.47935.sendpatchset@localhost.localdomain> <4F3DBCD8.2020505@linux.vnet.ibm.com> <20120220102029.GC8666@linux.vnet.ibm.com> In-Reply-To: <20120220102029.GC8666@linux.vnet.ibm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit x-cbid: 12022000-5490-0000-0000-000000C59A5F Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/20/2012 06:20 PM, Pradeep Kumar Surisetty wrote: > * Xiao Guangrong [2012-02-17 10:35:04]: > >> On 02/16/2012 11:52 PM, Pradeep Kumar wrote: >> >>> Xiao, >>> >>> i tried your perf events patch set on RHEL 6.1 host and failed to trace kvm-events with below error message. >>> >>> [root@kvm perf]# ./perf kvm-events report >>> Warning: unknown op '{' >>> Warning: Error: expected type 5 but read 1 >>> Warning: failed to read event print fmt for hrtimer_start >>> Warning: unknown op '{' >>> Warning: Error: expected type 5 but read 1 >>> Warning: failed to read event print fmt for hrtimer_expire_entry >>> Analyze events for all VCPUs: >>> VM-EXIT Samples Samples% Time% Avg time >>> Total Samples:0, Total events handled time:0.00us. >>> [root@kvm perf]# >>> >> >> >> Thanks for your try, Pradeep! >> >> It seems that kvm events do not be recorded. >> >> Do your guest was running when kvm-events was executed? > > Hello Xiao > > my guest was not running when i executed. > kvm-events only analyse kvm events and this events are generated only when kvm guest is running. :) >> What is the output of "./perf script | grep kvm_*"? > > [root@phx3 perf]# ./perf script | grep kvm_* > Warning: unknown op '{' > Warning: Error: expected type 5 but read 1 > Warning: failed to read event print fmt for hrtimer_start > Warning: unknown op '{' > Warning: Error: expected type 5 but read 1 > Warning: failed to read event print fmt for > hrtimer_expire_entry > # cmdline : /home/patch/linux/tools/perf/perf record -a -R > # -f -m 1024 -c 1 -e kvm:kvm_entry -e kvm:kvm_exit -e > # kvm:kvm_mmio -e kvm:kvm_pio -e timer:* > # event : name = kvm:kvm_entry, type = 2, config = 0x2ef, > # config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, > # id = { 6241, 6242, 6243, 6244, 6245, 6246, 6247, 6248 } > # event : name = kvm:kvm_exit, type = 2, config = 0x2ea, > # config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, > # id = { 6249, 6250, 6251, 6252, 6253, 6254, 6255, 6256 } > # event : name = kvm:kvm_mmio, type = 2, config = 0x2dd, > # config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, > # id = { 6257, 6258, 6259, 6260, 6261, 6262, 6263, 6264 } > # event : name = kvm:kvm_pio, type = 2, config = 0x2ed, > # config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, > # id = { 6265, 6266, 6267, 6268, 6269, 6270, 6271, 6272 } > no symbols found in /sbin/killall5, maybe install a debug > package? > That means no kvm event is recorded, please try it again when your kvm guest is running. Thanks, Pradeep!