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From: "David S. Ahern" <daahern@cisco.com>
To: Mark McLoughlin <markmc@redhat.com>
Cc: Avi Kivity <avi@qumranet.com>, kvm@vger.kernel.org
Subject: Re: [PATCH 5/6] kvm: qemu: virtio-net: handle all tx in I/O thread without timer
Date: Tue, 04 Nov 2008 08:23:25 -0700	[thread overview]
Message-ID: <491068ED.3020902@cisco.com> (raw)
In-Reply-To: <1225389113-28332-6-git-send-email-markmc@redhat.com>



Mark McLoughlin wrote:

> Note also that when tuning for a specific workload, which CPU
> the I/O thread is pinned to is important.
> 

Hi Mark:

Can you give an example of when that has a noticeable affect?

For example, if the guest handles network interrupts on vcpu0 and it is
pinned to pcpu0 where should the IO thread be pinned for best performance?

thanks,

david

  parent reply	other threads:[~2008-11-04 15:23 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-30 17:51 [PATCH 0/6] Kill off the virtio_net tx mitigation timer Mark McLoughlin
2008-10-30 17:51 ` [PATCH 1/6] kvm: qemu: virtio: remove unused variable Mark McLoughlin
2008-10-30 17:51   ` [PATCH 2/6] kvm: qemu: dup the qemu_eventfd() return Mark McLoughlin
2008-10-30 17:51     ` [PATCH 3/6] kvm: qemu: add qemu_eventfd_write() and qemu_eventfd_read() Mark McLoughlin
2008-10-30 17:51       ` [PATCH 4/6] kvm: qemu: aggregate reads from eventfd Mark McLoughlin
2008-10-30 17:51         ` [PATCH 5/6] kvm: qemu: virtio-net: handle all tx in I/O thread without timer Mark McLoughlin
2008-10-30 17:51           ` [PATCH 6/6] kvm: qemu: virtio-net: drop mutex during tx tapfd write Mark McLoughlin
2008-11-04 11:43             ` Avi Kivity
2008-10-30 19:24           ` [PATCH 5/6] kvm: qemu: virtio-net: handle all tx in I/O thread without timer Anthony Liguori
2008-10-31  9:16             ` Mark McLoughlin
2008-11-03 15:07               ` Mark McLoughlin
2008-11-02  9:56           ` Avi Kivity
2008-11-04 15:23           ` David S. Ahern [this message]
2008-11-06 17:02             ` Mark McLoughlin
2008-11-06 17:13               ` David S. Ahern
2008-11-06 17:43               ` Avi Kivity
2008-10-30 19:20 ` [PATCH 0/6] Kill off the virtio_net tx mitigation timer Anthony Liguori
2008-11-02  9:48 ` Avi Kivity
2008-11-03 12:23   ` Mark McLoughlin
2008-11-03 12:40     ` Avi Kivity
2008-11-03 15:04       ` Mark McLoughlin
2008-11-03 15:19         ` Avi Kivity
2008-11-06 16:46           ` Mark McLoughlin
2008-11-06 17:38             ` Avi Kivity
2008-11-06 17:45       ` Mark McLoughlin
2008-11-09 11:29         ` Avi Kivity
2008-11-02  9:57 ` Avi Kivity

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