From: mst@redhat.com (Michael S. Tsirkin)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC] virtio: use mandatory barriers for remote processor vdevs
Date: Wed, 30 Nov 2011 16:50:04 +0200 [thread overview]
Message-ID: <20111130145004.GD21413@redhat.com> (raw)
In-Reply-To: <CAK=WgbZ5aBFNro3XC0cN+Ao4ZWrBHwwd3d__CSHA=n56gKmKXw@mail.gmail.com>
On Wed, Nov 30, 2011 at 01:55:53PM +0200, Ohad Ben-Cohen wrote:
> On Tue, Nov 29, 2011 at 5:19 PM, Michael S. Tsirkin <mst@redhat.com> wrote:
> > On Tue, Nov 29, 2011 at 03:57:19PM +0200, Ohad Ben-Cohen wrote:
> >> > Is an extra branch faster or slower than reverting d57ed95?
> >>
> >> Sorry, unfortunately I have no way to measure this, as I don't have
> >> any virtualization/x86 setup. I'm developing on ARM SoCs, where
> >> virtualization hardware is coming, but not here yet.
> >
> > You can try using the micro-benchmark in tools/virtio/.
>
> Hmm, care to show me exactly what do you mean ?
make headers_install
make -C tools/virtio/
(you'll need an empty stub for tools/virtio/linux/module.h,
I just sent a patch to add that)
sudo insmod tools/virtio/vhost_test/vhost_test.ko
./tools/virtio/virtio_test
> Though I somewhat suspect that any micro-benchmarking I'll do with my
> random ARM SoC will not have much value to real virtualization/x86
> workloads.
>
> Thanks,
> Ohad.
Real virtualization/x86 can keep using current smp_XX barriers, right?
We can have some config for your kind of setup.
--
MST
next prev parent reply other threads:[~2011-11-30 14:50 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-29 12:31 [RFC] virtio: use mandatory barriers for remote processor vdevs Ohad Ben-Cohen
2011-11-29 13:11 ` Michael S. Tsirkin
2011-11-29 13:57 ` Ohad Ben-Cohen
2011-11-29 15:16 ` Michael S. Tsirkin
2011-11-30 11:45 ` Ohad Ben-Cohen
2011-11-30 14:59 ` Michael S. Tsirkin
2011-11-30 16:04 ` Ohad Ben-Cohen
2011-11-30 16:15 ` Michael S. Tsirkin
2011-11-30 16:24 ` Ohad Ben-Cohen
2011-11-30 23:27 ` Ohad Ben-Cohen
2011-11-30 23:43 ` Michael S. Tsirkin
2011-12-01 6:20 ` Ohad Ben-Cohen
2011-11-29 15:19 ` Michael S. Tsirkin
2011-11-30 11:55 ` Ohad Ben-Cohen
2011-11-30 14:50 ` Michael S. Tsirkin [this message]
2011-11-30 22:43 ` Ohad Ben-Cohen
2011-11-30 23:13 ` Michael S. Tsirkin
2011-12-01 2:28 ` Rusty Russell
2011-12-01 7:15 ` Ohad Ben-Cohen
2011-12-01 8:12 ` Michael S. Tsirkin
2011-12-02 0:26 ` Rusty Russell
2011-12-01 6:14 ` Ohad Ben-Cohen
2011-12-01 9:09 ` Michael S. Tsirkin
2011-12-02 23:09 ` Benjamin Herrenschmidt
2011-12-03 5:14 ` Rusty Russell
2011-12-11 12:25 ` Michael S. Tsirkin
2011-12-11 22:27 ` Benjamin Herrenschmidt
2011-12-12 3:06 ` Amos Kong
2011-12-12 5:12 ` Rusty Russell
2011-12-12 23:56 ` Amos Kong
2011-12-19 2:35 ` Rusty Russell
2011-12-19 2:19 ` Amos Kong
2011-12-19 2:41 ` Benjamin Herrenschmidt
2011-12-19 7:21 ` Amos Kong
2011-12-19 2:50 ` Amos Kong
2011-12-19 8:37 ` Rusty Russell
2011-12-03 6:01 ` Ohad Ben-Cohen
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