Dor Laor wrote: > Haydn Solomon wrote: >> I have a question on guest smp performance. If I have a host with core >> 2 duo, should a kvm guest perform better using -smp 2 as opposed to >> not using -smp 2? >> > Well, it depends: > In general Avi measured 40% performance increase for using a second cpu > in the guest. This was long time ago, > before the in-kernel-apic implementation. It might improve the gain of > the additional cpu. > > On the other hand, for 32 bit windows, using ACPI HAL has pretty big > overhead at the moment. Since it is a must > for smp guest, it might be slower than running non-acpi single cpu VM.
can you tell me what does the HAL means here? and what's kind of HAL exists what are the advantage/disadvantages them. how can i change/configure this? -- Levente "Si vis pacem para bellum!" ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
