Re: native kvm tool hrtimer problem
I tried using the kernel 3.2.11 and i had different results: -one time it worked correctly without errors -one time i had the hrtimer message but the network seemed continue working -one time the network stopped working (during udp test) If you have time, try using these scripts: http://pastebin.com/K4sJq724 for the client on vm with ip address 192.168.0.x http://pastebin.com/xLfR94EZ for the server on a vm with ip address 192.168.0.3 -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: native kvm tool hrtimer problem
On Mon, Mar 12, 2012 at 11:03 PM, Daniele Carollo carollo.d...@gmail.com wrote: The command I use is something like: sudo /home/kvm/linux-kvm/tools/kvm/lkvm run -p root=/dev/vda1 -d /home/kvm/Internato/debian_squeeze_i386_standard.raw -n vhost=on,guest_mac=00:16:35:AF:94:4B,guest_ip=192.168.0.3,host_ip=192.168.0.9 and then in order to connect the tap interface to the host bridge: /usr/bin/sudo /sbin/brctl addif br0 tap0 Usually the error comes up when the vm is sendig udp packets to the second vm. It's possible to reobtain the control of the console by pressing ctrl-z but the network becomes unusable. (even trying pinging the host) The second vm, acting as server on my test, is correctly connected the host. Same story for the stock kernel (3.1.9-1.4-desktop on opensuse 11.2) but here the problems come up in the first part of the test, when it's sending udp packets to the host. To start kvm tool on stock kernel i have to use -p idle=halt due to a kernel bug. I tried both virtio-net/without vhost and virtio-net/with vhost with UDP and TCP stress between two VMs. I did not see any problems. Can you try stable kernel as your guest kernel, e.g. 3.2.X, 3.0.X? -- Asias He -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: native kvm tool hrtimer problem
The command I use is something like: sudo /home/kvm/linux-kvm/tools/kvm/lkvm run -p root=/dev/vda1 -d /home/kvm/Internato/debian_squeeze_i386_standard.raw -n vhost=on,guest_mac=00:16:35:AF:94:4B,guest_ip=192.168.0.3,host_ip=192.168.0.9 and then in order to connect the tap interface to the host bridge: /usr/bin/sudo /sbin/brctl addif br0 tap0 Usually the error comes up when the vm is sendig udp packets to the second vm. It's possible to reobtain the control of the console by pressing ctrl-z but the network becomes unusable. (even trying pinging the host) The second vm, acting as server on my test, is correctly connected the host. Same story for the stock kernel (3.1.9-1.4-desktop on opensuse 11.2) but here the problems come up in the first part of the test, when it's sending udp packets to the host. To start kvm tool on stock kernel i have to use -p idle=halt due to a kernel bug. Daniele -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: native kvm tool hrtimer problem
On 03/08/2012 11:51 PM, Cyrill Gorcunov wrote: On Thu, Mar 08, 2012 at 04:31:17PM +0100, Daniele Carollo wrote: I don't really use the tap interface so lets CC Asias. Which guest kernel are you using, btw? Yup, Asias was using it, if my memory doesn't betray me. Also both -- host and guest kernel versions might be useful to know. iirc we were emulating rtc only while anything else passes through to kvm kernel driver. Cyrill As guest I'm using debian 6.0 squeeze found here http://people.debian.org/~aurel32/qemu/i386/debian_squeeze_i386_standard.qcow2 while on the host I'm using Opensuse 11.2 with kernel 3.3.0-rc1KVM gitted from here http://git.kernel.org/pub/scm/virt/kvm/kvm.git OK, lets see what Asias say. Hi, Daniele The guest should be fine, I use that image as well. Can you post the command line which you started the kvm tool? Is tap/virtio or vhost/virtio working before the iperf stress testing, like ping guestA in guesgB? Can you try it on host with stock kernel from your distro? -- Asias He -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
native kvm tool hrtimer problem
Hi all, for an university study, I'm doing some network test between two vm using native linux kvm tool and connected via tap/virtio/vhost. When I run my script (several consecutive iperf tcp and udp execution), the first vm freeze with a message like: hrtimer: interrupt took * ns. Is this a bug? (In order to complete the test i had to set the number of guest cpu to 1) Do you know what is the expected throughput between two vm using virtio/vhost? Thanks, Daniele -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: native kvm tool hrtimer problem
On Thu, Mar 8, 2012 at 4:32 PM, Daniele Carollo carollo.d...@gmail.com wrote: for an university study, I'm doing some network test between two vm using native linux kvm tool and connected via tap/virtio/vhost. When I run my script (several consecutive iperf tcp and udp execution), the first vm freeze with a message like: hrtimer: interrupt took * ns. Is this a bug? (In order to complete the test i had to set the number of guest cpu to 1) Do you know what is the expected throughput between two vm using virtio/vhost? I don't really use the tap interface so lets CC Asias. Which guest kernel are you using, btw? -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: native kvm tool hrtimer problem
On Thu, Mar 08, 2012 at 05:11:16PM +0200, Pekka Enberg wrote: On Thu, Mar 8, 2012 at 4:32 PM, Daniele Carollo carollo.d...@gmail.com wrote: for an university study, I'm doing some network test between two vm using native linux kvm tool and connected via tap/virtio/vhost. When I run my script (several consecutive iperf tcp and udp execution), the first vm freeze with a message like: hrtimer: interrupt took * ns. Is this a bug? (In order to complete the test i had to set the number of guest cpu to 1) Do you know what is the expected throughput between two vm using virtio/vhost? I don't really use the tap interface so lets CC Asias. Which guest kernel are you using, btw? Yup, Asias was using it, if my memory doesn't betray me. Also both -- host and guest kernel versions might be useful to know. iirc we were emulating rtc only while anything else passes through to kvm kernel driver. Cyrill -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: native kvm tool hrtimer problem
Il giorno 08 marzo 2012 16:13, Cyrill Gorcunov gorcu...@openvz.org ha scritto: On Thu, Mar 08, 2012 at 05:11:16PM +0200, Pekka Enberg wrote: On Thu, Mar 8, 2012 at 4:32 PM, Daniele Carollo carollo.d...@gmail.com wrote: for an university study, I'm doing some network test between two vm using native linux kvm tool and connected via tap/virtio/vhost. When I run my script (several consecutive iperf tcp and udp execution), the first vm freeze with a message like: hrtimer: interrupt took * ns. Is this a bug? (In order to complete the test i had to set the number of guest cpu to 1) Do you know what is the expected throughput between two vm using virtio/vhost? I don't really use the tap interface so lets CC Asias. Which guest kernel are you using, btw? Yup, Asias was using it, if my memory doesn't betray me. Also both -- host and guest kernel versions might be useful to know. iirc we were emulating rtc only while anything else passes through to kvm kernel driver. Cyrill As guest I'm using debian 6.0 squeeze found here http://people.debian.org/~aurel32/qemu/i386/debian_squeeze_i386_standard.qcow2 while on the host I'm using Opensuse 11.2 with kernel 3.3.0-rc1KVM gitted from here http://git.kernel.org/pub/scm/virt/kvm/kvm.git Daniele -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: native kvm tool hrtimer problem
On Thu, Mar 08, 2012 at 04:31:17PM +0100, Daniele Carollo wrote: I don't really use the tap interface so lets CC Asias. Which guest kernel are you using, btw? Yup, Asias was using it, if my memory doesn't betray me. Also both -- host and guest kernel versions might be useful to know. iirc we were emulating rtc only while anything else passes through to kvm kernel driver. Cyrill As guest I'm using debian 6.0 squeeze found here http://people.debian.org/~aurel32/qemu/i386/debian_squeeze_i386_standard.qcow2 while on the host I'm using Opensuse 11.2 with kernel 3.3.0-rc1KVM gitted from here http://git.kernel.org/pub/scm/virt/kvm/kvm.git OK, lets see what Asias say. Cyrill -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
