From: Avi Kivity <avi@redhat.com>
To: Nikola Ciprich <nikola.ciprich@linuxbox.cz>
Cc: kvm@vger.kernel.org, Gleb Natapov <gleb@redhat.com>
Subject: Re: KVM got slow after adding more physical memory to host
Date: Tue, 06 Sep 2011 19:06:55 +0300 [thread overview]
Message-ID: <4E66451F.2040204@redhat.com> (raw)
In-Reply-To: <4E66450A.8070302@redhat.com>
On 09/06/2011 07:06 PM, Avi Kivity wrote:
> On 09/06/2011 07:01 PM, Nikola Ciprich wrote:
>> > 404
>> ouch, dumb me :-/
>> http://nelide.cz/downloads/nik/trace.dat.bz2
>> sorry
>> n.
>>
>
> qemu-kvm-4618 [000] 13698.803169: kvm_emulate_insn:
> 0:806edb12: rep outsw
> qemu-kvm-4618 [000] 13698.803170: kvm_pio:
> pio_write at 0x1f0 size 2 count 1
> qemu-kvm-4618 [000] 13698.803171: kvm_userspace_exit:
> reason KVM_EXIT_IO (2)
> qemu-kvm-4618 [000] 13698.803186: kvm_entry: vcpu 0
> qemu-kvm-4618 [000] 13698.803189: kvm_exit:
> reason IO_INSTRUCTION rip 0x806edb12 info 1f00031 0
>
> qemu-kvm-4618 [000] 13698.803191: kvm_emulate_insn:
> 0:806edb12: rep outsw
> qemu-kvm-4618 [000] 13698.803192: kvm_pio:
> pio_write at 0x1f0 size 2 count 1
> qemu-kvm-4618 [000] 13698.803193: kvm_userspace_exit:
> reason KVM_EXIT_IO (2)
> qemu-kvm-4618 [000] 13698.803195: kvm_entry: vcpu 0
> qemu-kvm-4618 [000] 13698.803198: kvm_exit:
> reason IO_INSTRUCTION rip 0x806edb12 info 1f00031 0
>
>
> One of your guests is using IDE PIO instead of DMA. Switch it back to
> DMA.
Even better, switch it to virtio.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2011-09-06 16:06 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-06 14:02 KVM got slow after adding more physical memory to host Nikola Ciprich
2011-09-06 15:13 ` Avi Kivity
2011-09-06 15:38 ` Nikola Ciprich
2011-09-06 15:45 ` Avi Kivity
2011-09-06 16:01 ` Nikola Ciprich
2011-09-06 16:06 ` Avi Kivity
2011-09-06 16:06 ` Avi Kivity [this message]
2011-09-06 16:10 ` Gleb Natapov
2011-09-06 16:30 ` Nikola Ciprich
2011-09-06 17:01 ` Avi Kivity
2011-09-06 19:22 ` KVM got slow after adding more physical memory to host - SOLVED Nikola Ciprich
2011-09-08 14:58 ` Michael Tokarev
2011-09-06 16:08 ` KVM got slow after adding more physical memory to host Avi Kivity
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