On 2014/12/11 11:10, Linhaifeng wrote: > Hi,all > > Yestoday i tested the set_mem_table message found that qemu not send all the > memory info(fd and size) when > VM memory size is 2G and have two numa nodes(two hugepage files).If VM memory > size is 4G and have two numa nodes > will send all the memory info. > > Here is my understand,is this right? > If qemu not send all the memory infomation about hugepage files,vhost-user > couldn't map all the VM memory. > If vhost-user couldn't map all the VM memory vhost-user maybe couldn't read > the packets which allocate by Guest. > > > 1.Information about VM who has 2G and two numa nodes(vhost-user couldn't read > the packets from tx_ring of Guest): > xml: > <cpu> > <numa> > <cell id='0' cpus='0' memory='1048576' memAccess='shared'/> > <cell id='1' cpus='1' memory='1048576' memAccess='shared'/> > </numa> > </cpu> > <memoryBacking> > <hugepages> > <page size="2" unit="M" nodeset="0,1"/> > </hugepages> > </memoryBacking> > <interface type='vhostuser'> > <mac address='52:54:00:3b:83:1a'/> > <source type='unix' path='/var/run/vhost-user/port1' mode='client'/> > <model type='virtio'/> > </interface> > > qemu command: > -m 2048 -smp 2,sockets=2,cores=1,threads=1 > -object > memory-backend-file,prealloc=yes,mem-path=/dev/hugepages/libvirt/qemu,share=on,size=1024M,id=ram-node0 > -numa node,nodeid=0,cpus=0,memdev=ram-node0 > -object > memory-backend-file,prealloc=yes,mem-path=/dev/hugepages/libvirt/qemu,share=on,size=1024M,id=ram-node1 > -numa node,nodeid=1,cpus=1,memdev=ram-node1 > > > memory regions: > gpa = 0xC0000 > size = 2146697216 > ua = 0x2aaaaacc0000 > offset = 786432 > > gpa = 0x0 > size = 655360 > ua = 0x2aaaaac00000 > offset = 0 > > hugepage: > cat /proc/pidof qemu/maps > 2aaaaac00000-2aaaeac00000 rw-s 00000000 00:18 10357788 > /dev/hugepages/libvirt/qemu/qemu_back_mem._objects_ram-node0.MvcPyi (deleted) > 2aaaeac00000-2aab2ac00000 rw-s 00000000 00:18 10357789 > /dev/hugepages/libvirt/qemu/qemu_back_mem._objects_ram-node1.tjAVin (deleted) > > The memory size of each region is not match to the size of each hugepage > file,is this ok?How does vhost-user to mmap all the hugepage? > > 2.Information about VM who has 4G and two numa nodes(vhost-user could read > the packets from tx_ring of Guest): > xml: > <cpu> > <numa> > <cell id='0' cpus='0' memory='2097152' memAccess='shared'/> > <cell id='1' cpus='1' memory='2097152' memAccess='shared'/> > </numa> > </cpu> > > <memoryBacking> > <hugepages> > <page size="2" unit="M" nodeset="0,1"/> > </hugepages> > </memoryBacking> > > qemu command: > -m 4096 -smp 2,sockets=2,cores=1,threads=1 > -object > memory-backend-file,prealloc=yes,mem-path=/dev/hugepages/libvirt/qemu,share=on,size=2048M,id=ram-node0 > -numa node,nodeid=0,cpus=0,memdev=ram-node0 > -object > memory-backend-file,prealloc=yes,mem-path=/dev/hugepages/libvirt/qemu,share=on,size=2048M,id=ram-node1 > -numa node,nodeid=1,cpus=1,memdev=ram-node1 > > memory regions: > gpa = 0xC0000 > size = 3220439040 > ua = 0x2aaaaacc0000 > offset = 786432 > > gpa = 0x100000000 > size = 1073741824 > ua = 0x2aab6ac00000 > offset = 1073741824 > > gpa = 0x0 > size = 655360 > ua = 0x2aaaaac00000 > offset = 0 > > hugepage: > cat /proc/pidof qemu/maps > 2aaaaac00000-2aab2ac00000 rw-s 00000000 00:18 10756623 > /dev/hugepages/libvirt/qemu/qemu_back_mem._objects_ram-node0.If4Qkf (deleted) > 2aab2ac00000-2aabaac00000 rw-s 00000000 00:18 10756624 > /dev/hugepages/libvirt/qemu/qemu_back_mem._objects_ram-node1.jQZPcI (deleted) >
-- Regards, Haifeng
