On Tue, Mar 26, 2024 at 03:46:29PM +, Will Deacon wrote:
> On Tue, Mar 26, 2024 at 11:43:13AM +, Will Deacon wrote:
> > On Tue, Mar 26, 2024 at 09:38:55AM +, Keir Fraser wrote:
> > > On Tue, Mar 26, 2024 at 03:49:02AM -0400, Michael S. Tsirkin wrote:
> > > > > Secondly, the debugging
On 3/27/24 09:14, Gavin Shan wrote:
On 3/27/24 01:46, Will Deacon wrote:
On Tue, Mar 26, 2024 at 11:43:13AM +, Will Deacon wrote:
Ok, long shot after eyeballing the vhost code, but does the diff below
help at all? It looks like vhost_vq_avail_empty() can advance the value
saved in
On 3/27/24 01:46, Will Deacon wrote:
On Tue, Mar 26, 2024 at 11:43:13AM +, Will Deacon wrote:
Ok, long shot after eyeballing the vhost code, but does the diff below
help at all? It looks like vhost_vq_avail_empty() can advance the value
saved in 'vq->avail_idx' but without the read
On Tue, Mar 26, 2024 at 11:43:13AM +, Will Deacon wrote:
> On Tue, Mar 26, 2024 at 09:38:55AM +, Keir Fraser wrote:
> > On Tue, Mar 26, 2024 at 03:49:02AM -0400, Michael S. Tsirkin wrote:
> > > > Secondly, the debugging code is enhanced so that the available head for
> > > >
On Tue, Mar 26, 2024 at 09:38:55AM +, Keir Fraser wrote:
> On Tue, Mar 26, 2024 at 03:49:02AM -0400, Michael S. Tsirkin wrote:
> > > Secondly, the debugging code is enhanced so that the available head for
> > > (last_avail_idx - 1) is read for twice and recorded. It means the
> > > available
On Tue, Mar 26, 2024 at 03:49:02AM -0400, Michael S. Tsirkin wrote:
> On Mon, Mar 25, 2024 at 05:34:29PM +1000, Gavin Shan wrote:
> >
> > On 3/20/24 17:14, Michael S. Tsirkin wrote:
> > > On Wed, Mar 20, 2024 at 03:24:16PM +1000, Gavin Shan wrote:
> > > > On 3/20/24 10:49, Michael S. Tsirkin
On Mon, Mar 25, 2024 at 05:34:29PM +1000, Gavin Shan wrote:
>
> On 3/20/24 17:14, Michael S. Tsirkin wrote:
> > On Wed, Mar 20, 2024 at 03:24:16PM +1000, Gavin Shan wrote:
> > > On 3/20/24 10:49, Michael S. Tsirkin wrote:>
> > > > diff --git a/drivers/virtio/virtio_ring.c
On 3/20/24 17:14, Michael S. Tsirkin wrote:
On Wed, Mar 20, 2024 at 03:24:16PM +1000, Gavin Shan wrote:
On 3/20/24 10:49, Michael S. Tsirkin wrote:>
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 6f7e5010a673..79456706d0bd 100644
---
On 3/21/24 03:15, Keir Fraser wrote:
On Wed, Mar 20, 2024 at 03:24:16PM +1000, Gavin Shan wrote:
Before this patch was posted, I had debugging code to record last 16
transactions
to the available and used queue from guest and host side. It did reveal the
wrong
head was fetched from the
On Wed, Mar 20, 2024 at 03:24:16PM +1000, Gavin Shan wrote:
>
> Before this patch was posted, I had debugging code to record last 16
> transactions
> to the available and used queue from guest and host side. It did reveal the
> wrong
> head was fetched from the available queue.
>
> [
On Wed, Mar 20, 2024 at 03:24:16PM +1000, Gavin Shan wrote:
> On 3/20/24 10:49, Michael S. Tsirkin wrote:>
> > I think you are wasting the time with these tests. Even if it helps what
> > does this tell us? Try setting a flag as I suggested elsewhere.
> > Then check it in vhost.
> > Or here's
On 3/20/24 10:49, Michael S. Tsirkin wrote:>
I think you are wasting the time with these tests. Even if it helps what
does this tell us? Try setting a flag as I suggested elsewhere.
Then check it in vhost.
Or here's another idea - possibly easier. Copy the high bits from index
into ring itself.
On Wed, Mar 20, 2024 at 09:56:58AM +1000, Gavin Shan wrote:
> On 3/20/24 04:22, Will Deacon wrote:
> > On Tue, Mar 19, 2024 at 02:59:23PM +1000, Gavin Shan wrote:
> > > On 3/19/24 02:59, Will Deacon wrote:
> > > > >drivers/virtio/virtio_ring.c | 12 +---
> > > > >1 file changed, 9
On 3/20/24 04:22, Will Deacon wrote:
On Tue, Mar 19, 2024 at 02:59:23PM +1000, Gavin Shan wrote:
On 3/19/24 02:59, Will Deacon wrote:
drivers/virtio/virtio_ring.c | 12 +---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/virtio/virtio_ring.c
On Tue, Mar 19, 2024 at 02:59:23PM +1000, Gavin Shan wrote:
> On 3/19/24 02:59, Will Deacon wrote:
> > On Thu, Mar 14, 2024 at 05:49:23PM +1000, Gavin Shan wrote:
> > > The issue is reported by Yihuang Yu who have 'netperf' test on
> > > NVidia's grace-grace and grace-hopper machines. The
On Tue, Mar 19, 2024 at 03:36:31AM -0400, Michael S. Tsirkin wrote:
> On Mon, Mar 18, 2024 at 04:59:24PM +, Will Deacon wrote:
> > On Thu, Mar 14, 2024 at 05:49:23PM +1000, Gavin Shan wrote:
> > > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> > > index
On Tue, Mar 19, 2024 at 06:08:27PM +1000, Gavin Shan wrote:
> On 3/19/24 17:09, Michael S. Tsirkin wrote:
> > On Tue, Mar 19, 2024 at 04:49:50PM +1000, Gavin Shan wrote:
> > >
> > > On 3/19/24 16:43, Michael S. Tsirkin wrote:
> > > > On Tue, Mar 19, 2024 at 04:38:49PM +1000, Gavin Shan wrote:
> >
On Tue, Mar 19, 2024 at 04:54:15PM +1000, Gavin Shan wrote:
> On 3/19/24 16:10, Michael S. Tsirkin wrote:
> > On Tue, Mar 19, 2024 at 02:09:34AM -0400, Michael S. Tsirkin wrote:
> > > On Tue, Mar 19, 2024 at 02:59:23PM +1000, Gavin Shan wrote:
> > > > On 3/19/24 02:59, Will Deacon wrote:
> [...]
>
On 3/19/24 17:09, Michael S. Tsirkin wrote:
On Tue, Mar 19, 2024 at 04:49:50PM +1000, Gavin Shan wrote:
On 3/19/24 16:43, Michael S. Tsirkin wrote:
On Tue, Mar 19, 2024 at 04:38:49PM +1000, Gavin Shan wrote:
On 3/19/24 16:09, Michael S. Tsirkin wrote:
diff --git
On 3/19/24 17:04, Michael S. Tsirkin wrote:
On Tue, Mar 19, 2024 at 04:54:15PM +1000, Gavin Shan wrote:
On 3/19/24 16:10, Michael S. Tsirkin wrote:
On Tue, Mar 19, 2024 at 02:09:34AM -0400, Michael S. Tsirkin wrote:
On Tue, Mar 19, 2024 at 02:59:23PM +1000, Gavin Shan wrote:
On 3/19/24
On Mon, Mar 18, 2024 at 04:59:24PM +, Will Deacon wrote:
> On Thu, Mar 14, 2024 at 05:49:23PM +1000, Gavin Shan wrote:
> > The issue is reported by Yihuang Yu who have 'netperf' test on
> > NVidia's grace-grace and grace-hopper machines. The 'netperf'
> > client is started in the VM hosted by
On Tue, Mar 19, 2024 at 04:49:50PM +1000, Gavin Shan wrote:
>
> On 3/19/24 16:43, Michael S. Tsirkin wrote:
> > On Tue, Mar 19, 2024 at 04:38:49PM +1000, Gavin Shan wrote:
> > > On 3/19/24 16:09, Michael S. Tsirkin wrote:
> > >
> > > > > > > diff --git a/drivers/virtio/virtio_ring.c
> > > > > >
On Tue, Mar 19, 2024 at 04:54:15PM +1000, Gavin Shan wrote:
> On 3/19/24 16:10, Michael S. Tsirkin wrote:
> > On Tue, Mar 19, 2024 at 02:09:34AM -0400, Michael S. Tsirkin wrote:
> > > On Tue, Mar 19, 2024 at 02:59:23PM +1000, Gavin Shan wrote:
> > > > On 3/19/24 02:59, Will Deacon wrote:
> [...]
>
On 3/19/24 16:10, Michael S. Tsirkin wrote:
On Tue, Mar 19, 2024 at 02:09:34AM -0400, Michael S. Tsirkin wrote:
On Tue, Mar 19, 2024 at 02:59:23PM +1000, Gavin Shan wrote:
On 3/19/24 02:59, Will Deacon wrote:
[...]
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
On 3/19/24 16:43, Michael S. Tsirkin wrote:
On Tue, Mar 19, 2024 at 04:38:49PM +1000, Gavin Shan wrote:
On 3/19/24 16:09, Michael S. Tsirkin wrote:
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 49299b1f9ec7..7d852811c912 100644
---
On Tue, Mar 19, 2024 at 04:38:49PM +1000, Gavin Shan wrote:
> On 3/19/24 16:09, Michael S. Tsirkin wrote:
>
> > > > > diff --git a/drivers/virtio/virtio_ring.c
> > > > > b/drivers/virtio/virtio_ring.c
> > > > > index 49299b1f9ec7..7d852811c912 100644
> > > > > --- a/drivers/virtio/virtio_ring.c
On 3/19/24 16:09, Michael S. Tsirkin wrote:
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 49299b1f9ec7..7d852811c912 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -687,9 +687,15 @@ static inline int virtqueue_add_split(struct
On Thu, Mar 14, 2024 at 05:49:23PM +1000, Gavin Shan wrote:
> The issue is reported by Yihuang Yu who have 'netperf' test on
> NVidia's grace-grace and grace-hopper machines. The 'netperf'
> client is started in the VM hosted by grace-hopper machine,
> while the 'netperf' server is running on
On Tue, Mar 19, 2024 at 02:09:34AM -0400, Michael S. Tsirkin wrote:
> On Tue, Mar 19, 2024 at 02:59:23PM +1000, Gavin Shan wrote:
> > On 3/19/24 02:59, Will Deacon wrote:
> > > On Thu, Mar 14, 2024 at 05:49:23PM +1000, Gavin Shan wrote:
> > > > The issue is reported by Yihuang Yu who have
On Tue, Mar 19, 2024 at 02:59:23PM +1000, Gavin Shan wrote:
> On 3/19/24 02:59, Will Deacon wrote:
> > On Thu, Mar 14, 2024 at 05:49:23PM +1000, Gavin Shan wrote:
> > > The issue is reported by Yihuang Yu who have 'netperf' test on
> > > NVidia's grace-grace and grace-hopper machines. The
On 3/19/24 02:59, Will Deacon wrote:
On Thu, Mar 14, 2024 at 05:49:23PM +1000, Gavin Shan wrote:
The issue is reported by Yihuang Yu who have 'netperf' test on
NVidia's grace-grace and grace-hopper machines. The 'netperf'
client is started in the VM hosted by grace-hopper machine,
while the
On Thu, Mar 14, 2024 at 05:49:23PM +1000, Gavin Shan wrote:
> The issue is reported by Yihuang Yu who have 'netperf' test on
> NVidia's grace-grace and grace-hopper machines. The 'netperf'
> client is started in the VM hosted by grace-hopper machine,
> while the 'netperf' server is running on
On Mon, Mar 18, 2024 at 09:41:45AM +1000, Gavin Shan wrote:
> On 3/18/24 02:50, Michael S. Tsirkin wrote:
> > On Fri, Mar 15, 2024 at 09:24:36PM +1000, Gavin Shan wrote:
> > >
> > > On 3/15/24 21:05, Michael S. Tsirkin wrote:
> > > > On Fri, Mar 15, 2024 at 08:45:10PM +1000, Gavin Shan wrote:
> >
On 3/18/24 02:50, Michael S. Tsirkin wrote:
On Fri, Mar 15, 2024 at 09:24:36PM +1000, Gavin Shan wrote:
On 3/15/24 21:05, Michael S. Tsirkin wrote:
On Fri, Mar 15, 2024 at 08:45:10PM +1000, Gavin Shan wrote:
Yes, I guess smp_wmb() ('dmb') is buggy on NVidia's grace-hopper platform. I
tried
On Fri, Mar 15, 2024 at 09:24:36PM +1000, Gavin Shan wrote:
>
> On 3/15/24 21:05, Michael S. Tsirkin wrote:
> > On Fri, Mar 15, 2024 at 08:45:10PM +1000, Gavin Shan wrote:
> > > > > Yes, I guess smp_wmb() ('dmb') is buggy on NVidia's grace-hopper
> > > > > platform. I tried
> > > to reproduce it
On 3/15/24 21:05, Michael S. Tsirkin wrote:
On Fri, Mar 15, 2024 at 08:45:10PM +1000, Gavin Shan wrote:
Yes, I guess smp_wmb() ('dmb') is buggy on NVidia's grace-hopper platform. I
tried
to reproduce it with my own driver where one thread writes to the shared buffer
and another thread reads
On Fri, Mar 15, 2024 at 08:45:10PM +1000, Gavin Shan wrote:
>
> + Will, Catalin and Matt from Nvidia
>
> On 3/14/24 22:59, Michael S. Tsirkin wrote:
> > On Thu, Mar 14, 2024 at 10:50:15PM +1000, Gavin Shan wrote:
> > > On 3/14/24 21:50, Michael S. Tsirkin wrote:
> > > > On Thu, Mar 14, 2024 at
+ Will, Catalin and Matt from Nvidia
On 3/14/24 22:59, Michael S. Tsirkin wrote:
On Thu, Mar 14, 2024 at 10:50:15PM +1000, Gavin Shan wrote:
On 3/14/24 21:50, Michael S. Tsirkin wrote:
On Thu, Mar 14, 2024 at 08:15:22PM +1000, Gavin Shan wrote:
On 3/14/24 18:05, Michael S. Tsirkin wrote:
On Thu, Mar 14, 2024 at 10:50:15PM +1000, Gavin Shan wrote:
> On 3/14/24 21:50, Michael S. Tsirkin wrote:
> > On Thu, Mar 14, 2024 at 08:15:22PM +1000, Gavin Shan wrote:
> > > On 3/14/24 18:05, Michael S. Tsirkin wrote:
> > > > On Thu, Mar 14, 2024 at 05:49:23PM +1000, Gavin Shan wrote:
> > > > >
On 3/14/24 21:50, Michael S. Tsirkin wrote:
On Thu, Mar 14, 2024 at 08:15:22PM +1000, Gavin Shan wrote:
On 3/14/24 18:05, Michael S. Tsirkin wrote:
On Thu, Mar 14, 2024 at 05:49:23PM +1000, Gavin Shan wrote:
The issue is reported by Yihuang Yu who have 'netperf' test on
NVidia's grace-grace
On Thu, Mar 14, 2024 at 08:15:22PM +1000, Gavin Shan wrote:
> On 3/14/24 18:05, Michael S. Tsirkin wrote:
> > On Thu, Mar 14, 2024 at 05:49:23PM +1000, Gavin Shan wrote:
> > > The issue is reported by Yihuang Yu who have 'netperf' test on
> > > NVidia's grace-grace and grace-hopper machines. The
On 3/14/24 18:05, Michael S. Tsirkin wrote:
On Thu, Mar 14, 2024 at 05:49:23PM +1000, Gavin Shan wrote:
The issue is reported by Yihuang Yu who have 'netperf' test on
NVidia's grace-grace and grace-hopper machines. The 'netperf'
client is started in the VM hosted by grace-hopper machine,
while
On Thu, Mar 14, 2024 at 05:49:23PM +1000, Gavin Shan wrote:
> The issue is reported by Yihuang Yu who have 'netperf' test on
> NVidia's grace-grace and grace-hopper machines. The 'netperf'
> client is started in the VM hosted by grace-hopper machine,
> while the 'netperf' server is running on
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