Messages in this thread | | | Date | Mon, 26 Dec 2011 13:41:04 +0200 | From | Avi Kivity <> | Subject | Re: [RFC PATCH 0/4] Gang scheduling in CFS |
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On 12/26/2011 01:33 PM, Nikunj A Dadhania wrote: > On Mon, 26 Dec 2011 11:05:01 +0200, Avi Kivity <avi@redhat.com> wrote: > > On 12/26/2011 05:14 AM, Nikunj A Dadhania wrote: > > > > > > > > btw you can get an additional speedup by enabling x2apic, for > > > > default_send_IPI_mask_logical(). > > > > > > > In the host? > > > > > > > In the host, > > > The machine(IBM x3650 M2, Nehalem) does not seem to support x2apic.
It's emulated.
> I have enabled the following in my config; > > [root@krm1 linux-tip]# grep X2APIC .config > CONFIG_X86_X2APIC=y > [root@krm1 linux-tip]# > > And booted the kernel with "apic=verbose" command. > > [root@krm1 linux-tip]# dmesg | grep -i x2apic > [root@krm1 linux-tip]# > > Does not give anything. I safely assumed that x2apic is not > supported. Is there something to do in the bios to enable this?
Sorry, I was imprecise. Boot the guest, it will recognize the emulated x2apic.
-- error compiling committee.c: too many arguments to function
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