On 6/8/2012 10:42 AM, Alex Williamson wrote:
On Fri, 2012-06-08 at 10:10 -0700, Chegu Vinod wrote:
On 6/8/2012 9:46 AM, Alex Williamson wrote:
On Fri, 2012-06-08 at 16:29 +0000, Chegu Vinod wrote:
Hello,
I picked up a recent version of the qemu (1.0.92 with some fixes) and tried it
on x86_64 server (with host and the guest running 3.4.1 kernel).
BTW, I observe the same thing if i were to use 1.1.50 version of the
qemu... not sure if this is really
related to qemu...
While trying to boot a large guest (80 vcpus + 512GB) I observed that the guest
took for ever to boot up... ~1 hr or even more. [This wasn't the case when I
was using RHEL 6.x related bits]
Was either case using device assignment? Device assignment will map and
pin each page of guest memory before startup, which can be a noticeable
pause on smallish (<16GB) guests. That should be linear scaling though
and if you're using qemu and not qemu-kvm, not related. Thanks,
I don't have any device assignment at this point . Yes I am using qemu
(not qemu-kvm)...
Just to be safe, are you using --enable-kvm with qemu?
Yes...
-----
/etc/qemu-ifup tap0
/usr/local/bin/qemu-system-x86_64 -enable-kvm \
-cpu
Westmere,+rdtscp,+pdpe1gb,+dca,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pclmuldq,+pbe,+tm,+ht,+s
s,+acpi,+ds,+vme \
-m 524288 -smp 80,sockets=80,cores=1,threads=1 \
-name vm1 \
-chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/vm1.monitor,server,nowait \
-drive
file=/dev/libvirt_lvm/vm.img,if=none,id=drive-virtio-disk0,format=raw,cache=none,aio=native
\
-device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
\
-monitor stdio \
-net nic,macaddr=52:54:00:71:01:01 \
-net tap,ifname=tap0,script=no,downscript=no \
-vnc :4
/etc/qemu-ifdown tap0
----
The issue seems very basic... 'was earlier running RHEL6.3 RC1 on the
host and the guest and the host and the guest seemed to boot fine..
Note that RHEL is based on qemu-kvm. Thanks,
Yep..knew that :)
I was using upstream qemu-kvm and was encouraged to move away from
it...to qemu.
Vinod
Alex
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