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Diffstat (limited to 'results/classifier/accel-gemma3:12b/kvm/1829696')
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diff --git a/results/classifier/accel-gemma3:12b/kvm/1829696 b/results/classifier/accel-gemma3:12b/kvm/1829696 new file mode 100644 index 000000000..a8724fac2 --- /dev/null +++ b/results/classifier/accel-gemma3:12b/kvm/1829696 @@ -0,0 +1,260 @@ + +qemu-kvm takes 100% CPU when running redhat/centos 7.6 guest VM OS + +Description +=========== +When running redhat or centos 7.6 guest os on vm, +the cpu usage is very low on vm(100% idle), but on host, +qemu-kvm reports 100% cpu busy usage. + +After searching some related bugs report, +I suspect that it is due to the clock settings in vm's domain xml. +My Openstack cluster uses the default clock settings as follow: + <clock offset='utc'> + <timer name='rtc' tickpolicy='catchup'/> + <timer name='pit' tickpolicy='delay'/> + <timer name='hpet' present='no'/> + </clock> +And in this report, https://bugs.launchpad.net/qemu/+bug/1174654 +it claims that <timer name='rtc' track='guest'/> can solve the 100% cpu usage problem when using Windows Image Guest OS, +but I makes some tests, the solusion dose not work for me. + + +Steps to reproduce +================== +* create a vm using centos or redhat 7.6 image +* using sar tool inside vm and host to check the cpu usage, and compare them + + +Expected result +=============== +host's cpu usage report should be same with vm's cpu usage + + +Actual result +============= +vm's cpu usage is 100% idle, host's cpu usage is 100% busy + + +Environment +=========== +1. Exact version of OpenStack you are running. +# rpm -qa | grep nova +openstack-nova-compute-13.1.2-1.el7.noarch +python2-novaclient-3.3.2-1.el7.noarch +python-nova-13.1.2-1.el7.noarch +openstack-nova-common-13.1.2-1.el7.noarch + +2. Which hypervisor did you use? + (For example: Libvirt + KVM, Libvirt + XEN, Hyper-V, PowerKVM, ...) + What's the version of that? +# libvirtd -V +libvirtd (libvirt) 3.9.0 + +# /usr/libexec/qemu-kvm --version +QEMU emulator version 2.6.0 (qemu-kvm-ev-2.6.0-28.el7_3.6.1), Copyright (c) 2003-2008 Fabrice Bellard + + +Logs & Configs +============== +The VM xml: +<domain type='kvm' id='29'> + <name>instance-00005022</name> + <uuid>7f5a66a5-****-****-****-75dec****bbb</uuid> + <metadata> + <nova:instance xmlns:nova="http://openstack.org/xmlns/libvirt/nova/1.0"> + <nova:package version="13.1.2-1.el7"/> + <nova:name>*******</nova:name> + <nova:creationTime>2019-05-20 03:08:46</nova:creationTime> + <nova:flavor name="2d2dab36-****-****-****-246e9****110"> + <nova:memory>2048</nova:memory> + <nova:disk>12</nova:disk> + <nova:swap>2048</nova:swap> + <nova:ephemeral>0</nova:ephemeral> + <nova:vcpus>1</nova:vcpus> + </nova:flavor> + <nova:owner> + <nova:user uuid="********************">****</nova:user> + <nova:project uuid="********************">****</nova:project> + </nova:owner> + <nova:root type="image" uuid="4496a420-****-****-****-b50f****ada3"/> + </nova:instance> + </metadata> + <memory unit='KiB'>2097152</memory> + <currentMemory unit='KiB'>2097152</currentMemory> + <vcpu placement='static'>1</vcpu> + <cputune> + <shares>1024</shares> + <vcpupin vcpu='0' cpuset='27'/> + <emulatorpin cpuset='27'/> + </cputune> + <numatune> + <memory mode='strict' nodeset='1'/> + <memnode cellid='0' mode='strict' nodeset='1'/> + </numatune> + <resource> + <partition>/machine</partition> + </resource> + <sysinfo type='smbios'> + <system> + <entry name='manufacturer'>Fedora Project</entry> + <entry name='product'>OpenStack Nova</entry> + <entry name='version'>13.1.2-1.el7</entry> + <entry name='serial'>64ab0e89-****-****-****-05312ef66983</entry> + <entry name='uuid'>7f5a66a5-****-****-****-75decaf82bbb</entry> + <entry name='family'>Virtual Machine</entry> + </system> + </sysinfo> + <os> + <type arch='x86_64' machine='pc-i440fx-rhel7.3.0'>hvm</type> + <boot dev='hd'/> + <smbios mode='sysinfo'/> + </os> + <features> + <acpi/> + <apic/> + </features> + <cpu mode='custom' match='exact' check='full'> + <model fallback='forbid'>IvyBridge</model> + <topology sockets='1' cores='1' threads='1'/> + <feature policy='require' name='hypervisor'/> + <feature policy='require' name='arat'/> + <feature policy='require' name='xsaveopt'/> + <numa> + <cell id='0' cpus='0' memory='2097152' unit='KiB'/> + </numa> + </cpu> + <clock offset='utc'> + <timer name='pit' tickpolicy='delay'/> + <timer name='rtc' tickpolicy='catchup'/> + <timer name='hpet' present='no'/> + </clock> + <on_poweroff>destroy</on_poweroff> + <on_reboot>restart</on_reboot> + <on_crash>destroy</on_crash> + <devices> + <emulator>/usr/libexec/qemu-kvm</emulator> + <disk type='file' device='disk'> + <driver name='qemu' type='raw' cache='none'/> + <source file='/data/instances/7f5a66a5-****-****-****-75decaf82bbb/disk'/> + <backingStore/> + <target dev='vda' bus='virtio'/> + <alias name='virtio-disk0'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> + </disk> + <disk type='file' device='disk'> + <driver name='qemu' type='raw' cache='none'/> + <source file='/data/instances/7f5a66a5-****-****-****-75decaf82bbb/disk.swap'/> + <backingStore/> + <target dev='vdb' bus='virtio'/> + <alias name='virtio-disk1'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> + </disk> + <disk type='file' device='cdrom'> + <driver name='qemu' type='raw' cache='none'/> + <source file='/data/instances/7f5a66a5-****-****-****-75decaf82bbb/disk.config'/> + <backingStore/> + <target dev='hdd' bus='ide'/> + <readonly/> + <alias name='ide0-1-1'/> + <address type='drive' controller='0' bus='1' target='0' unit='1'/> + </disk> + <controller type='usb' index='0' model='piix3-uhci'> + <alias name='usb'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> + </controller> + <controller type='pci' index='0' model='pci-root'> + <alias name='pci.0'/> + </controller> + <controller type='ide' index='0'> + <alias name='ide'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> + </controller> + <interface type='bridge'> + <mac address='fa:16:3e:a6:ea:4f'/> + <source bridge='brq52c66dc3-64'/> + <bandwidth> + <inbound average='102400'/> + <outbound average='102400'/> + </bandwidth> + <target dev='tapa29e94e5-42'/> + <model type='virtio'/> + <alias name='net0'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> + </interface> + <serial type='file'> + <source path='/data/instances/7f5a66a5-****-****-****-75decaf82bbb/console.log'/> + <target type='isa-serial' port='0'> + <model name='isa-serial'/> + </target> + <alias name='serial0'/> + </serial> + <serial type='pty'> + <source path='/dev/pts/10'/> + <target type='isa-serial' port='1'> + <model name='isa-serial'/> + </target> + <alias name='serial1'/> + </serial> + <console type='file'> + <source path='/data/instances/7f5a66a5-****-****-****-75decaf82bbb/console.log'/> + <target type='serial' port='0'/> + <alias name='serial0'/> + </console> + <input type='tablet' bus='usb'> + <alias name='input0'/> + <address type='usb' bus='0' port='1'/> + </input> + <input type='mouse' bus='ps2'> + <alias name='input1'/> + </input> + <input type='keyboard' bus='ps2'> + <alias name='input2'/> + </input> + <graphics type='vnc' port='5910' autoport='yes' listen='0.0.0.0' keymap='en-us'> + <listen type='address' address='0.0.0.0'/> + </graphics> + <video> + <model type='cirrus' vram='16384' heads='1' primary='yes'/> + <alias name='video0'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> + </video> + <memballoon model='virtio'> + <stats period='10'/> + <alias name='balloon0'/> + <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> + </memballoon> + </devices> + <seclabel type='dynamic' model='dac' relabel='yes'> + <label>+107:+107</label> + <imagelabel>+107:+107</imagelabel> + </seclabel> +</domain> + +CPU Usage Report inside VM: +# sar -u -P 0 1 5 +Linux 3.10.0-957.el7.x86_64 (******) 05/20/2019 _x86_64_ (1 CPU) + +11:34:40 AM CPU %user %nice %system %iowait %steal %idle +11:34:41 AM 0 0.00 0.00 0.00 0.00 0.00 100.00 +11:34:42 AM 0 0.00 0.00 0.00 0.00 0.00 100.00 +11:34:43 AM 0 0.00 0.00 0.00 0.00 0.00 100.00 +11:34:44 AM 0 0.00 0.00 0.00 0.00 0.00 100.00 +11:34:45 AM 0 0.00 0.00 0.00 0.00 0.00 100.00 +Average: 0 0.00 0.00 0.00 0.00 0.00 100.00 + +CPU Usage Report ON HOST(the vm's cpu is pinned on host's no.27 physic cpu): +# sar -u -P 27 1 5 +Linux 3.10.0-862.el7.x86_64 (******) 05/20/2019 _x86_64_ (48 CPU) + +11:34:40 AM CPU %user %nice %system %iowait %steal %idle +11:34:41 AM 27 100.00 0.00 0.00 0.00 0.00 0.00 +11:34:42 AM 27 100.00 0.00 0.00 0.00 0.00 0.00 +11:34:43 AM 27 100.00 0.00 0.00 0.00 0.00 0.00 +11:34:44 AM 27 100.00 0.00 0.00 0.00 0.00 0.00 +11:34:45 AM 27 100.00 0.00 0.00 0.00 0.00 0.00 +Average: 27 100.00 0.00 0.00 0.00 0.00 0.00 + +clocksource inside VM: +# cat /sys/devices/system/clocksource/clocksource0/current_clocksource +kvm_clock \ No newline at end of file |