virtio-net has a sudden high latency

Hi, all. virtio-net  has a sudden high latency when receiving.  i think it is irq related, but i have no idea to fix it. centos 3.10.0-693.21.1.el7.x86_64 ; qemu-kvm-ev-2.6.0-28.el7_3.9.1.x86_64  ;    physical machine has 40 cpus,   the two vms are on the same node,  cpu load is very low. 1

virtio-net has a sudden high latency when receiving

Hi, all. virtio-net has a sudden high latency when receiving. i think it is irq related, but i have no idea to fix it. centos 3.10.0-693.21.1.el7.x86_64 ; qemu-kvm-ev-2.6.0-28.el7_3.9.1.x86_64 ; physical machine has 40 cpus, the two vms are on the same node, cpu load is very low. 1

virtio-net has a sudden high latency when receiving

Hi, all. virtio-net has a sudden high latency when receiving. i think it is irq related, but i have no idea to fix it. 1) pic1: inside vm1(192.168.91.4) , ping 192.168.91.5; please notice seq 20 [1577252450.592441] 64 bytes from 192.168.91.5: icmp_seq=6 ttl=64 time=0.335 ms