Messages in this thread | | | From | Nikunj A Dadhania <> | Subject | Re: [RFC PATCH 0/4] Gang scheduling in CFS | Date | Mon, 26 Dec 2011 17:03:07 +0530 |
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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.
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?
> for the guest: > > qemu -cpu ...,+x2apic > I need to try this, i have libvirt setup. Let me dig how to enable this through xml file.
Regards Nikunj
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