Re: [RFC PATCH 0/4] Gang scheduling in CFS
From: Nikunj A Dadhania
Date: Mon Dec 26 2011 - 06:37:22 EST
On Mon, 26 Dec 2011 11:05:01 +0200, Avi Kivity <avi@xxxxxxxxxx> 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
And booted the kernel with "apic=verbose" command.
[root@krm1 linux-tip]# dmesg | grep -i x2apic
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.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/