Re: lots of APIC_TMICT exit on VM with assigned NIC

From: Avi Kivity
Date: Sun Jul 15 2012 - 04:04:51 EST


On 07/12/2012 08:32 PM, sheng qiu wrote:
> thanks for your reply.
> the value is very large.

Can you provide samples?

If it's large and fairly constant it means a timer keeps being pushed
back by the interrupts/


> is there anyway that i can avoid such
> frequent exits due to APIC_TMICT? do i need to modify some codes in
> kvm kernel module or adapt some parameters?
>

No, a guest change is needed. You need to find out what timer is
involved at modify it to set some slack, with
hrtimer_set_expires_range() or similar.
--
error compiling committee.c: too many arguments to function


--
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/