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KVM can take better advantage of hardware acceleration than Xen. Xen requires a modified guest, which traps back to the host more frequently.
by abdulla 9y ago
KVM can take better advantage of hardware acceleration than Xen. Xen requires a modified guest, which traps back to the host more frequently.
- wmf 9y agoIs that true with the newer modes? https://wiki.xen.org/wiki/Understanding_the_Virtualization_Spectrum https://wiki.xen.org/wiki/Understanding_the_Virtualization_S...
- abdulla 9y agoThis is based on a cursory examination of [1], so I may be off-base. But Xen appears to rely on the host for many things that can be, and often are, hardware accelerated in KVM. Searching for CONFIG_XEN_PVHVM, it doesn't appear to cover much. [1] https://github.com/torvalds/linux/blob/master/arch/x86/xen/ https://github.com/torvalds/linux/blob/master/arch/x86/xen/