* [Qemu-devel] Significant slowdown after qemu-kvm-1.2.0
@ 2013-07-01 21:51 jinho hwang
2013-07-01 21:54 ` Paolo Bonzini
0 siblings, 1 reply; 4+ messages in thread
From: jinho hwang @ 2013-07-01 21:51 UTC (permalink / raw)
To: qemu-devel
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Hi Guys,
I am new to kvm development (used to work on Xen). I used qemu-kvm-1.2.0
first, and then due to pci memory size (x64 bit support), I switched from
1.2.0 to qemu-kvm-1.5.0 (same for 1.3.0~). After that, my VM slows down
significantly including booting and execution. Also, sometimes kernel
messages "CPU stuck for x seconds" show in dmesg. I think CPU scheduling
has been changed or should be set up properly, but I have no clue for now.
Can anyone help me to figure out this? I really need some fast VMs as I
used to run with qemu-kvm-1.2.0.
I am currently running ubuntu-12.10_64 in VM, and my configure was
./configure --prefix=/usr --target-list=x86_64-linux-user,x86_64-softmmu
sudo qemu-system-x86_64 -name vm -m 1g -hda /home/jinho/virt/vms/vm1.img
-device e1000,netdev=net0,mac=00:0c:29:f0:bc:33 -netdev tap,id=net0 -vnc
135.207.127.181:1
No particular environmental settings are done.
Thank you,
Jinho
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [Qemu-devel] Significant slowdown after qemu-kvm-1.2.0
2013-07-01 21:51 [Qemu-devel] Significant slowdown after qemu-kvm-1.2.0 jinho hwang
@ 2013-07-01 21:54 ` Paolo Bonzini
0 siblings, 0 replies; 4+ messages in thread
From: Paolo Bonzini @ 2013-07-01 21:54 UTC (permalink / raw)
To: jinho hwang; +Cc: qemu-devel
Il 01/07/2013 23:51, jinho hwang ha scritto:
> Hi Guys,
>
> I am new to kvm development (used to work on Xen). I used qemu-kvm-1.2.0
> first, and then due to pci memory size (x64 bit support), I switched
> from 1.2.0 to qemu-kvm-1.5.0 (same for 1.3.0~).
There is no qemu-kvm 1.5.0. You are using qemu 1.5.0.
> After that, my VM slows
> down significantly including booting and execution. Also, sometimes
> kernel messages "CPU stuck for x seconds" show in dmesg. I think CPU
> scheduling has been changed or should be set up properly, but I have no
> clue for now. Can anyone help me to figure out this? I really need some
> fast VMs as I used to run with qemu-kvm-1.2.0.
>
> I am currently running ubuntu-12.10_64 in VM, and my configure was
>
> ./configure --prefix=/usr --target-list=x86_64-linux-user,x86_64-softmmu
>
> sudo qemu-system-x86_64 -name vm -m 1g -hda /home/jinho/virt/vms/vm1.img
> -device e1000,netdev=net0,mac=00:0c:29:f0:bc:33 -netdev tap,id=net0 -vnc
> 135.207.127.181:1 <http://135.207.127.181:1>
You are not using kvm. Add --enable-kvm to the command line.
Paolo
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Qemu-devel] Re: Significant slowdown after qemu-kvm-1.2.0
@ 2013-07-01 22:24 jinho hwang
2013-07-01 23:48 ` [Qemu-devel] " Andreas Färber
0 siblings, 1 reply; 4+ messages in thread
From: jinho hwang @ 2013-07-01 22:24 UTC (permalink / raw)
To: Paolo Bonzini; +Cc: qemu-devel
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Hi Paolo,
Thank you for your reply. I tried qemu-1.5.0 with --enable-kvm, but there
is still a big difference between qemu-kvm-1.2.0 and qemu-1.5.0. They both
use the same command line to create VM. Am I missing something in the
command-line?
sudo qemu-system-x86_64 -name vm -m 1g -hda /home/jinho/virt/vms/vm1.img
-device e1000,netdev=net0,mac=00:0c:29:f0:bc:33 -netdev tap,id=net0 -vnc :1
Thank you,
Jinho
On Mon, Jul 1, 2013 at 5:54 PM, Paolo Bonzini <pbonzini@redhat.com> wrote:
> Il 01/07/2013 23:51, jinho hwang ha scritto:
> > Hi Guys,
> >
> > I am new to kvm development (used to work on Xen). I used qemu-kvm-1.2.0
> > first, and then due to pci memory size (x64 bit support), I switched
> > from 1.2.0 to qemu-kvm-1.5.0 (same for 1.3.0~).
>
> There is no qemu-kvm 1.5.0. You are using qemu 1.5.0.
>
> > After that, my VM slows
> > down significantly including booting and execution. Also, sometimes
> > kernel messages "CPU stuck for x seconds" show in dmesg. I think CPU
> > scheduling has been changed or should be set up properly, but I have no
> > clue for now. Can anyone help me to figure out this? I really need some
> > fast VMs as I used to run with qemu-kvm-1.2.0.
> >
> > I am currently running ubuntu-12.10_64 in VM, and my configure was
> >
> > ./configure --prefix=/usr --target-list=x86_64-linux-user,x86_64-softmmu
> >
> > sudo qemu-system-x86_64 -name vm -m 1g -hda /home/jinho/virt/vms/vm1.img
> > -device e1000,netdev=net0,mac=00:0c:29:f0:bc:33 -netdev tap,id=net0 -vnc
> > 135.207.127.181:1 <http://135.207.127.181:1>
>
> You are not using kvm. Add --enable-kvm to the command line.
>
> Paolo
>
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [Qemu-devel] Significant slowdown after qemu-kvm-1.2.0
2013-07-01 22:24 [Qemu-devel] " jinho hwang
@ 2013-07-01 23:48 ` Andreas Färber
2013-07-02 12:47 ` jinho hwang
0 siblings, 1 reply; 4+ messages in thread
From: Andreas Färber @ 2013-07-01 23:48 UTC (permalink / raw)
To: jinho hwang; +Cc: Paolo Bonzini, qemu-devel
Hi,
Am 02.07.2013 00:24, schrieb jinho hwang:
> Thank you for your reply. I tried qemu-1.5.0 with --enable-kvm, but
> there is still a big difference between qemu-kvm-1.2.0 and qemu-1.5.0.
> They both use the same command line to create VM. Am I missing something
> in the command-line?
>
> sudo qemu-system-x86_64 -name vm -m 1g -hda /home/jinho/virt/vms/vm1.img
> -device e1000,netdev=net0,mac=00:0c:29:f0:bc:33 -netdev tap,id=net0 -vnc :1
Yes, you are still missing -enable-kvm on the QEMU command line, or
alternatively the more modern -machine accel=kvm.
Regards,
Andreas
P.S. Please avoid top-posting and HTML on the mailing list.
> On Mon, Jul 1, 2013 at 5:54 PM, Paolo Bonzini <pbonzini@redhat.com
> <mailto:pbonzini@redhat.com>> wrote:
>
> Il 01/07/2013 23:51, jinho hwang ha scritto:
> > Hi Guys,
> >
> > I am new to kvm development (used to work on Xen). I used
> qemu-kvm-1.2.0
> > first, and then due to pci memory size (x64 bit support), I switched
> > from 1.2.0 to qemu-kvm-1.5.0 (same for 1.3.0~).
>
> There is no qemu-kvm 1.5.0. You are using qemu 1.5.0.
>
> > After that, my VM slows
> > down significantly including booting and execution. Also, sometimes
> > kernel messages "CPU stuck for x seconds" show in dmesg. I think CPU
> > scheduling has been changed or should be set up properly, but I
> have no
> > clue for now. Can anyone help me to figure out this? I really need
> some
> > fast VMs as I used to run with qemu-kvm-1.2.0.
> >
> > I am currently running ubuntu-12.10_64 in VM, and my configure was
> >
> > ./configure --prefix=/usr
> --target-list=x86_64-linux-user,x86_64-softmmu
> >
> > sudo qemu-system-x86_64 -name vm -m 1g -hda
> /home/jinho/virt/vms/vm1.img
> > -device e1000,netdev=net0,mac=00:0c:29:f0:bc:33 -netdev
> tap,id=net0 -vnc
> > 135.207.127.181:1 <http://135.207.127.181:1>
> <http://135.207.127.181:1>
>
> You are not using kvm. Add --enable-kvm to the command line.
>
> Paolo
>
--
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer; HRB 16746 AG Nürnberg
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [Qemu-devel] Significant slowdown after qemu-kvm-1.2.0
2013-07-01 23:48 ` [Qemu-devel] " Andreas Färber
@ 2013-07-02 12:47 ` jinho hwang
0 siblings, 0 replies; 4+ messages in thread
From: jinho hwang @ 2013-07-02 12:47 UTC (permalink / raw)
To: Andreas Färber; +Cc: Paolo Bonzini, qemu-devel
On Mon, Jul 1, 2013 at 7:48 PM, Andreas Färber <afaerber@suse.de> wrote:
>
> Hi,
>
> Am 02.07.2013 00:24, schrieb jinho hwang:
> > Thank you for your reply. I tried qemu-1.5.0 with --enable-kvm, but
> > there is still a big difference between qemu-kvm-1.2.0 and qemu-1.5.0.
> > They both use the same command line to create VM. Am I missing something
> > in the command-line?
> >
> > sudo qemu-system-x86_64 -name vm -m 1g -hda /home/jinho/virt/vms/vm1.img
> > -device e1000,netdev=net0,mac=00:0c:29:f0:bc:33 -netdev tap,id=net0 -vnc :1
>
> Yes, you are still missing -enable-kvm on the QEMU command line, or
> alternatively the more modern -machine accel=kvm.
>
> Regards,
> Andreas
>
> P.S. Please avoid top-posting and HTML on the mailing list.
> > On Mon, Jul 1, 2013 at 5:54 PM, Paolo Bonzini <pbonzini@redhat.com
> > <mailto:pbonzini@redhat.com>> wrote:
> >
> > Il 01/07/2013 23:51, jinho hwang ha scritto:
> > > Hi Guys,
> > >
> > > I am new to kvm development (used to work on Xen). I used
> > qemu-kvm-1.2.0
> > > first, and then due to pci memory size (x64 bit support), I switched
> > > from 1.2.0 to qemu-kvm-1.5.0 (same for 1.3.0~).
> >
> > There is no qemu-kvm 1.5.0. You are using qemu 1.5.0.
> >
> > > After that, my VM slows
> > > down significantly including booting and execution. Also, sometimes
> > > kernel messages "CPU stuck for x seconds" show in dmesg. I think CPU
> > > scheduling has been changed or should be set up properly, but I
> > have no
> > > clue for now. Can anyone help me to figure out this? I really need
> > some
> > > fast VMs as I used to run with qemu-kvm-1.2.0.
> > >
> > > I am currently running ubuntu-12.10_64 in VM, and my configure was
> > >
> > > ./configure --prefix=/usr
> > --target-list=x86_64-linux-user,x86_64-softmmu
> > >
> > > sudo qemu-system-x86_64 -name vm -m 1g -hda
> > /home/jinho/virt/vms/vm1.img
> > > -device e1000,netdev=net0,mac=00:0c:29:f0:bc:33 -netdev
> > tap,id=net0 -vnc
> > > 135.207.127.181:1 <http://135.207.127.181:1>
> > <http://135.207.127.181:1>
> >
> > You are not using kvm. Add --enable-kvm to the command line.
> >
> > Paolo
> >
>
>
> --
> SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
> GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer; HRB 16746 AG Nürnberg
That works perfect! I only included --enable-kvm to configure, not
qemu-system-x86_64. Now it works very fast. I just registered e-mail
list, and found the qemu development is very active. Very good to be
part of it now. Thanks! - Jinho
^ permalink raw reply [flat|nested] 4+ messages in thread
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