Red Hat Bugzilla – Full Text Bug Listing
|Summary:||qemu virtualization extremely slow|
|Product:||[Fedora] Fedora||Reporter:||Rui Mota <rmomota>|
|Component:||qemu||Assignee:||Fedora Virtualization Maintainers <virt-maint>|
|Status:||CLOSED NOTABUG||QA Contact:||Fedora Extras Quality Assurance <extras-qa>|
|Version:||17||CC:||amit.shah, berrange, cfergeau, dwmw2, itamar, knoel, pbonzini, rjones, scottt.tw, virt-maint|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2012-08-04 11:07:23 EDT||Type:||Bug|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description Rui Mota 2012-08-04 10:59:29 EDT
qemu is extremely slow when running a CPU that does not support virtualization. The virtual machine performance makes it impossible to work with. But when using another product like vmware the virtual machine performs very good. My laptop is not that old but unfortunately it does not support virtualization. The command: egrep '^flags.*(vmx|svm)' /proc/cpuinfo brings nothing. It would be very useful for my daily work if qemu works as well as vmware. How reproducible: Never worked fine as long as I remember. I keep switching to vmware every release of qemu I try hoping that some day some one will look at vmware code and implement the same algorithm. Steps to Reproduce: 1. create a vm in a CPU that doest not support virtualization. Actual results: Super slow virtual machine and impossible to work with. Expected results: Should work as well as vmware as the system configuration is the same.
Comment 1 Richard W.M. Jones 2012-08-04 11:07:23 EDT
There's no possible way we can solve this in Fedora. I won't even suggest that you take it up with upstream qemu unless you have a huge set of patches and/or a radical new approach.