From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gleb Natapov <gleb@redhat.com>
Subject: Re: performance trouble
Date: Thu, 16 Feb 2012 11:01:26 +0200
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Cc: Avi Kivity <avi@redhat.com>, kvm@vger.kernel.org,
	Vadim Rozenfeld <vrozenfe@redhat.com>
To: David Cure <kvm@cure.nom.fr>
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On Thu, Feb 16, 2012 at 09:55:53AM +0100, David Cure wrote:
> 		hello,
> 
> Le Tue, Feb 14, 2012 at 03:40:30PM +0200, Gleb Natapov ecrivait :
> > 
> > Try to add -no-hpet to qemu command line and see if it helps.
> 
> 	I add this line in my xml definition for libvirt :
> 
> 	<timer name='hpet' present='no'/> in the clock block. And I see
> the -no-hpet in the command line :
> 
> /usr/bin/kvm -S -M pc-1.0 -enable-kvm -m 16384 -smp
> 2,sockets=2,cores=1,threads=1 -name rds1 -uuid
> 4f72a64e-de1a-b3da-adac-5dffdb9eb6aa -nodefconfig -nodefaults -chardev
> socket,id=charmonitor,path=/var/lib/libvirt/qemu/rds1.monitor,server,nowait
> -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime
> -no-hpet -no-shutdown -drive
> file=/dev/drbd1,if=none,id=drive-virtio-disk0,format=raw,cache=none,aio=native
> -device
> virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
> -drive
> file=/Iso/SW_DVD5_Windows_Svr_DC_EE_SE_Web_2008R2_64-bit_French_X15-59758.ISO,if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw
> -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0
> -netdev tap,fd=18,id=hostnet0 -device
> virtio-net-pci,netdev=hostnet0,id=net0,mac=00:16:36:0c:a1:c4,bus=pci.0,addr=0x3
> -chardev pty,id=charserial0 -device
> isa-serial,chardev=charserial0,id=serial0 -usb -device
> usb-tablet,id=input0 -vnc 127.0.0.1:0 -k fr -vga std -device
> virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
> 
> 	But unfortunatly, the result is the same : always 12s to runs
> this function (to remember 8s on ESXi 4).
> 
Can you do the trace again with -no-hpet on the command line?

--
			Gleb.