Thanks Mark, That is a very good point.
Just found out I forgot to add "--socket-mem 1024,0" after increasing the page number from 1 to 4. With "sudo ./ovs-vswitchd --dpdk -c 0x1 -n 4 --socket-mem 1024,0 -- unix:$DB_SOCK --pidfile --detach", the problem is gone. Now I got: qemu-system-x86_64: -netdev type=vhost-user,id=net1,chardev=char1,vhostforce: chardev "char1" went up qemu-system-x86_64: -netdev type=vhost-user,id=net2,chardev=char2,vhostforce: chardev "char2" went up Then the terminal is frozen. How can I get into the console of the VM? Regards, Charlie On Wed, Aug 3, 2016 at 9:24 AM, Kavanagh, Mark B <mark.b.kavan...@intel.com> wrote: > > > >Thanks Sugesh for your response. > > > >I have 4 1G hugepages allocated and the VM is requesting 3G memory. > > > >$ cat /proc/cmdline > >BOOT_IMAGE=/vmlinuz-4.5.7-200.fc23.x86_64 > root=/dev/mapper/fedora--desktop-root ro > >rd.lvm.lv=fedora-desktop/root rd.lvm.lv=fedora-desktop/swap > default_hugepagesz=1G > >hugepagesz=1G hugepages=4 rhgb quiet > > > >$ grep Huge /proc/meminfo > >AnonHugePages: 0 kB > >HugePages_Total: 4 > >HugePages_Free: 0 > >HugePages_Rsvd: 0 > >HugePages_Surp: 0 > >Hugepagesize: 1048576 kB > > Hi Charlie, > > Even though you have 4 pages mounted, none are available (see > Hugepages_Free = 0, above). > > Have you tried unmounting and remounting the hugepages? > > Thanks, > Mark > > > > >Regards, > > > >Charlie > > > >On Tue, Aug 2, 2016 at 5:23 PM, Chandran, Sugesh < > sugesh.chand...@intel.com> wrote: > > > > > >Regards > >_Sugesh > > > >From: discuss [mailto:discuss-boun...@openvswitch.org] On Behalf Of > Charlie Li > >Sent: Tuesday, August 2, 2016 4:28 PM > >To: discuss@openvswitch.org > >Subject: [ovs-discuss] unable to map backing store for hugepages: Cannot > allocate memory > > > >Hi All, > > > >I am trying to use dpdkvhostuser to pass traffic to VM. > > > >Here is my basic system configuration. > > > >Host and VM OS: Fedora server 23 > >DPDK 2.2.0 > >OVS 2.50 > >QEMU 2.4.1 > > > >When I tried to start the VM, it got the following error: > > > >qemu-system-x86_64: -object memory-backend-file,id=mem,size=3072M,mem- > >path=/dev/hugepages,share=on: unable to map backing store for hugepages: > Cannot allocate > >memory > > > >I must did some thing wrong. > >Any help is appreciated. > > > >Thanks, > > > >Charlie > > > >More details > > >--------------------------------------------------------------------------------------------- > >---------------------- > > > >[cli@cli-desktop ~]$ grep Huge /proc/meminfo > >AnonHugePages: 0 kB > >HugePages_Total: 4 > >HugePages_Free: 0 > >HugePages_Rsvd: 0 > >HugePages_Surp: 0 > >Hugepagesize: 1048576 kB > > > >[cli@cli-desktop utilities]$ sudo ./ovs-vsctl show > >4fcf27a6-edbd-4770-ab39-f440e3532bcc > > Bridge "br0" > > Port "vhost0" > > Interface "vhost0" > > type: dpdkvhostuser > > Port "vhost1" > > Interface "vhost1" > > type: dpdkvhostuser > > Port "br0" > > Interface "br0" > > type: internal > > Port "dpdk1" > > Interface "dpdk1" > > type: dpdk > > Port "dpdk0" > > Interface "dpdk0" > > type: dpdk > > > >[cli@cli-desktop utilities]$ sudo ./ovs-vsctl list-ports br0 > >dpdk0 > >dpdk1 > >vhost0 > >vhost1 > > > >[cli@cli-desktop utilities]$ sudo ./ovs-ofctl dump-flows br0 > >NXST_FLOW reply (xid=0x4): > > cookie=0x0, duration=61391.667s, table=0, n_packets=0, n_bytes=0, > idle_age=61391, in_port=1 > >actions=output:3 > > cookie=0x0, duration=61391.650s, table=0, n_packets=0, n_bytes=0, > idle_age=61391, in_port=2 > >actions=output:4 > > cookie=0x0, duration=61391.632s, table=0, n_packets=0, n_bytes=0, > idle_age=61391, in_port=3 > >actions=output:1 > > cookie=0x0, duration=61391.616s, table=0, n_packets=0, n_bytes=0, > idle_age=61391, in_port=4 > >actions=output:2 > > > >[cli@cli-desktop utilities]$ sudo qemu-system-x86_64 -m 3072 -cpu host > -hda > >/home/cli/VM1/FC23.qcow2 -boot c -enable-kvm -pidfile > /home/cli/VM1/vm1.pid -monitor > >unix:/home/cli/VM1/vm1monitor,server,nowait -name 'FC23-VM1' -net none > -no-reboot -object > >memory-backend-file,id=mem,size=3072M,mem-path=/dev/hugepages,share=on > -numa node,memdev=mem > >-mem-prealloc -chardev > socket,id=char1,path=/usr/local/var/run/openvswitch/vhost0 -netdev > >type=vhost-user,id=net1,chardev=char1,vhostforce -device virtio-net- > > >pci,netdev=net1,mac=00:00:00:00:00:01,csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ec > >n=off,mrg_rxbuf=off -chardev > socket,id=char2,path=/usr/local/var/run/openvswitch/vhost1 - > >netdev type=vhost-user,id=net2,chardev=char2,vhostforce -device > virtio-net- > > >pci,netdev=net2,mac=00:00:00:00:00:02,csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ec > >n=off,mrg_rxbuf=off --nographic -vnc :14 > > > >qemu-system-x86_64: -object memory-backend-file,id=mem,size=3072M,mem- > >path=/dev/hugepages,share=on: unable to map backing store for hugepages: > Cannot allocate > >m/emory > >[Sugesh] May be you are out of hugepages? How much memory you are > allocating for OVS-DPDK? > > > > > >
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