Displaying 20 results from an estimated 1322 matches for "coherently".
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coherent
2017 Feb 01
4
[PATCH] virtio: Try to untangle DMA coherency
...,8 @@ Required properties:
- compatible: "virtio,mmio" compatibility string
- reg: control registers base address and size including configuration space
- interrupts: interrupt generated by the device
+- dma-coherent: required if the device (or host emulation) accesses memory
+ cache-coherently, absent otherwise
Example:
@@ -14,4 +16,5 @@ Example:
compatible = "virtio,mmio";
reg = <0x3000 0x100>;
interrupts = <41>;
+ dma-coherent;
}
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 7e38ed79c3fc..961af25b385c 100644
--- a/...
2017 Feb 01
4
[PATCH] virtio: Try to untangle DMA coherency
...,8 @@ Required properties:
- compatible: "virtio,mmio" compatibility string
- reg: control registers base address and size including configuration space
- interrupts: interrupt generated by the device
+- dma-coherent: required if the device (or host emulation) accesses memory
+ cache-coherently, absent otherwise
Example:
@@ -14,4 +16,5 @@ Example:
compatible = "virtio,mmio";
reg = <0x3000 0x100>;
interrupts = <41>;
+ dma-coherent;
}
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 7e38ed79c3fc..961af25b385c 100644
--- a/...
2017 Feb 01
3
[PATCH] virtio: Try to untangle DMA coherency
On Wed, Feb 01, 2017 at 08:09:21PM +0200, Michael S. Tsirkin wrote:
> On Wed, Feb 01, 2017 at 12:25:57PM +0000, Robin Murphy wrote:
> > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> > index 7e38ed79c3fc..961af25b385c 100644
> > --- a/drivers/virtio/virtio_ring.c
> > +++ b/drivers/virtio/virtio_ring.c
> > @@ -20,6 +20,7 @@
> >
2017 Feb 01
3
[PATCH] virtio: Try to untangle DMA coherency
On Wed, Feb 01, 2017 at 08:09:21PM +0200, Michael S. Tsirkin wrote:
> On Wed, Feb 01, 2017 at 12:25:57PM +0000, Robin Murphy wrote:
> > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> > index 7e38ed79c3fc..961af25b385c 100644
> > --- a/drivers/virtio/virtio_ring.c
> > +++ b/drivers/virtio/virtio_ring.c
> > @@ -20,6 +20,7 @@
> >
2017 Feb 01
0
[PATCH] virtio: Try to untangle DMA coherency
...:
> - compatible: "virtio,mmio" compatibility string
> - reg: control registers base address and size including configuration space
> - interrupts: interrupt generated by the device
> +- dma-coherent: required if the device (or host emulation) accesses memory
> + cache-coherently, absent otherwise
So QEMU is getting with not providing this property at the moment and this
patch continues to ensure that works coherently, which is the right thing
to do. However, if QEMU ever emulates devices with VIRTIO_F_IOMMU_PLATFORM,
then it will need to provide this property for coherent...
2017 Feb 01
0
[PATCH] virtio: Try to untangle DMA coherency
On Wed, Feb 01, 2017 at 06:27:09PM +0000, Will Deacon wrote:
> On Wed, Feb 01, 2017 at 08:09:21PM +0200, Michael S. Tsirkin wrote:
> > On Wed, Feb 01, 2017 at 12:25:57PM +0000, Robin Murphy wrote:
> > > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> > > index 7e38ed79c3fc..961af25b385c 100644
> > > --- a/drivers/virtio/virtio_ring.c
2005 Dec 01
1
squared coherency and cross-spectrum
Hi All,
I have two time series, each has length 354. I tried to calculate the
coherency^2 between them, but the value I got is always 1. On a website,
it says: " Note that if the ensemble averaging were to be omitted, the
coherency (squared) would be 1, independent of the data". Does any of
you know how to specify properly in R in order to get more useful
coherency? The examples in
2017 Feb 08
2
[PATCH] virtio: Try to untangle DMA coherency
On 02/01/2017 08:19 PM, Michael S. Tsirkin wrote:
> On Wed, Feb 01, 2017 at 06:27:09PM +0000, Will Deacon wrote:
>> On Wed, Feb 01, 2017 at 08:09:21PM +0200, Michael S. Tsirkin wrote:
>>> On Wed, Feb 01, 2017 at 12:25:57PM +0000, Robin Murphy wrote:
>>>> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
>>>> index
2017 Feb 08
2
[PATCH] virtio: Try to untangle DMA coherency
On 02/01/2017 08:19 PM, Michael S. Tsirkin wrote:
> On Wed, Feb 01, 2017 at 06:27:09PM +0000, Will Deacon wrote:
>> On Wed, Feb 01, 2017 at 08:09:21PM +0200, Michael S. Tsirkin wrote:
>>> On Wed, Feb 01, 2017 at 12:25:57PM +0000, Robin Murphy wrote:
>>>> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
>>>> index
2017 Feb 01
0
[PATCH] virtio: Try to untangle DMA coherency
...:
> - compatible: "virtio,mmio" compatibility string
> - reg: control registers base address and size including configuration space
> - interrupts: interrupt generated by the device
> +- dma-coherent: required if the device (or host emulation) accesses memory
> + cache-coherently, absent otherwise
>
> Example:
>
> @@ -14,4 +16,5 @@ Example:
> compatible = "virtio,mmio";
> reg = <0x3000 0x100>;
> interrupts = <41>;
> + dma-coherent;
> }
> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_rin...
2015 Dec 17
1
[PATCH] virtio_ring: use smp_store_mb
On Thu, Dec 17, 2015 at 04:09:17PM +0100, Peter Zijlstra wrote:
> On Thu, Dec 17, 2015 at 04:34:57PM +0200, Michael S. Tsirkin wrote:
> > On Thu, Dec 17, 2015 at 03:02:12PM +0100, Peter Zijlstra wrote:
>
> > > > commit 9e1a27ea42691429e31f158cce6fc61bc79bb2e9
> > > > Author: Alexander Duyck <alexander.h.duyck at redhat.com>
> > > > Date:
2015 Dec 17
1
[PATCH] virtio_ring: use smp_store_mb
On Thu, Dec 17, 2015 at 04:09:17PM +0100, Peter Zijlstra wrote:
> On Thu, Dec 17, 2015 at 04:34:57PM +0200, Michael S. Tsirkin wrote:
> > On Thu, Dec 17, 2015 at 03:02:12PM +0100, Peter Zijlstra wrote:
>
> > > > commit 9e1a27ea42691429e31f158cce6fc61bc79bb2e9
> > > > Author: Alexander Duyck <alexander.h.duyck at redhat.com>
> > > > Date:
2010 Oct 09
2
[PATCH 1/2] Ocfs2: Add a mount option "coherency=*" for O_DIRECT writes.
Currently, default behavior of O_DIRECT writes was allowing
concurrent writing among nodes, no cluster coherency guaranteed
(no EX locks was taken), it hurts buffered reads on other nodes
by reading stale data from cache.
The new mount option introduce a chance to choose two different
behaviors for O_DIRECT writes:
* coherency=full, as the default value, will disallow
concurrent
2015 Dec 17
2
[PATCH] virtio_ring: use smp_store_mb
On Thu, Dec 17, 2015 at 03:02:12PM +0100, Peter Zijlstra wrote:
> On Thu, Dec 17, 2015 at 03:26:29PM +0200, Michael S. Tsirkin wrote:
> > > Note that virtio_mb() is weirdly inconsistent with virtio_[rw]mb() in
> > > that they use dma_* ops for weak_barriers, while virtio_mb() uses
> > > smp_mb().
> >
> > It's a hack really. I think I'll clean it
2015 Dec 17
2
[PATCH] virtio_ring: use smp_store_mb
On Thu, Dec 17, 2015 at 03:02:12PM +0100, Peter Zijlstra wrote:
> On Thu, Dec 17, 2015 at 03:26:29PM +0200, Michael S. Tsirkin wrote:
> > > Note that virtio_mb() is weirdly inconsistent with virtio_[rw]mb() in
> > > that they use dma_* ops for weak_barriers, while virtio_mb() uses
> > > smp_mb().
> >
> > It's a hack really. I think I'll clean it
2011 Jul 11
1
Spectral Coherence
Greetings,
I would like to estimate a spectral coherence between
two timeseries. The stats : spectrum() returns a coh matrix
which estimates coherence (squared).
A basic test which from which i expect near-zero coherence:
x = rnorm(500)
y = rnorm(500)
xts = ts(x, frequency = 10)
yts = ts(y, frequency = 10)
gxy = spectrum( cbind( xts, yts ) )
plot( gxy $ freq, gxy $
2017 Feb 09
2
[PATCH] virtio: Try to untangle DMA coherency
On Thu, Feb 09, 2017 at 06:31:18PM +0000, Will Deacon wrote:
> On Thu, Feb 09, 2017 at 08:17:16PM +0200, Michael S. Tsirkin wrote:
> > On Thu, Feb 02, 2017 at 04:40:49PM +0000, Will Deacon wrote:
> > > On Thu, Feb 02, 2017 at 06:30:28PM +0200, Michael S. Tsirkin wrote:
> > > > I am inclined to say, for 4.10 let's revert
> > > >
2017 Feb 09
2
[PATCH] virtio: Try to untangle DMA coherency
On Thu, Feb 09, 2017 at 06:31:18PM +0000, Will Deacon wrote:
> On Thu, Feb 09, 2017 at 08:17:16PM +0200, Michael S. Tsirkin wrote:
> > On Thu, Feb 02, 2017 at 04:40:49PM +0000, Will Deacon wrote:
> > > On Thu, Feb 02, 2017 at 06:30:28PM +0200, Michael S. Tsirkin wrote:
> > > > I am inclined to say, for 4.10 let's revert
> > > >
2017 Feb 09
3
[PATCH] virtio: Try to untangle DMA coherency
On Thu, Feb 02, 2017 at 04:40:49PM +0000, Will Deacon wrote:
> On Thu, Feb 02, 2017 at 06:30:28PM +0200, Michael S. Tsirkin wrote:
> > I am inclined to say, for 4.10 let's revert
> > c7070619f3408d9a0dffbed9149e6f00479cf43b since what it fixes is not a
> > regression in 4.10.
>
> No complaints there, as long as we can keep working to fix this for 4.11
> and
2017 Feb 09
3
[PATCH] virtio: Try to untangle DMA coherency
On Thu, Feb 02, 2017 at 04:40:49PM +0000, Will Deacon wrote:
> On Thu, Feb 02, 2017 at 06:30:28PM +0200, Michael S. Tsirkin wrote:
> > I am inclined to say, for 4.10 let's revert
> > c7070619f3408d9a0dffbed9149e6f00479cf43b since what it fixes is not a
> > regression in 4.10.
>
> No complaints there, as long as we can keep working to fix this for 4.11
> and