[Qemu-discuss] network latency for virtio-net-pci

2014-09-01 Thread George Shuklin
Hello. We running qemu 1.5, and one of the users complains on high latency on the overlay network of openstack. I done some research and comparation and found those numbers: V - virtual machine with qemu/virtio-net-pci tap device. H - hardware server S - hardware switch O - openvswitch bridge

Re: [Qemu-discuss] network latency for virtio-net-pci

2014-09-02 Thread George Shuklin
On 09/02/2014 06:05 AM, Zhang Haoyu wrote: We running qemu 1.5, and one of the users complains on high latency on the overlay network of openstack. I done some research and comparation and found those numbers: V - virtual machine with qemu/virtio-net-pci tap device. H - hardware server S - hard

Re: [Qemu-discuss] Virtio-blk and trim

2014-10-01 Thread George Shuklin
It's better to name it 'discard', because TRIM a very specific ATA command. It done completely different in SCSI and slightly different in SD cards. But linux call it 'discard', or, to be precise, BLKDISCARD (name of ioctl). On 10/01/2014 02:21 AM, Brian Rak wrote: Are there any plans to bring