FYI: For compute shaders, we have a bit in INTERFACE_DESCRIPTOR_DATA
for this which we can set from userspace without whitelisting a
register. If drivers can't handle mid-thread, they should just set
that bit. Unless we can mid-thread preempt media or 3D which don't
have such a bit in which case
Quoting Chris Wilson (2019-03-05 21:10:42)
> Quoting Rafael Antognolli (2019-03-05 17:30:00)
> > On Tue, Mar 05, 2019 at 01:48:26PM +0100, Michał Winiarski wrote:
> > > We assumed that the default preemption granularity is fine for ICL.
> > > Unfortunately, it turns out that some drivers don't
Quoting Rafael Antognolli (2019-03-05 17:30:00)
> On Tue, Mar 05, 2019 at 01:48:26PM +0100, Michał Winiarski wrote:
> > We assumed that the default preemption granularity is fine for ICL.
> > Unfortunately, it turns out that some drivers don't support mid-thread
> > preemption for compute
Fixes multiple gpu hangs in piglit and vulkancts.
Both patches are:
Tested-by: Anuj Phogat
On Tue, Mar 5, 2019 at 4:48 AM Michał Winiarski
wrote:
>
> We assumed that the default preemption granularity is fine for ICL.
> Unfortunately, it turns out that some drivers don't support mid-thread
>
On Tue, Mar 05, 2019 at 01:48:26PM +0100, Michał Winiarski wrote:
> We assumed that the default preemption granularity is fine for ICL.
> Unfortunately, it turns out that some drivers don't support mid-thread
> preemption for compute workloads.
> If a workload that doesn't support mid-thread
We assumed that the default preemption granularity is fine for ICL.
Unfortunately, it turns out that some drivers don't support mid-thread
preemption for compute workloads.
If a workload that doesn't support mid-thread preemption gets mid-thread
preempted, we're going to observe a GPU hang.
While
Quoting Rodrigo Vivi (2019-02-28 22:32:35)
> On Thu, Feb 28, 2019 at 11:02:54AM -0800, Rodrigo Vivi wrote:
> (What I' wondering now is that how this behaviour can change with GuC...
> I heard some media folks were using i915 directly and facing some
> strange gpu hangs but no gpu hang when using
On Thu, Feb 28, 2019 at 11:02:54AM -0800, Rodrigo Vivi wrote:
> On Wed, Feb 27, 2019 at 04:51:08PM +0100, Michał Winiarski wrote:
> > We assumed that the default preemption granularity is fine for ICL.
> > Unfortunately, it turns out that some drivers don't support mid-thread
> > preemption for
On Wed, Feb 27, 2019 at 04:51:08PM +0100, Michał Winiarski wrote:
> We assumed that the default preemption granularity is fine for ICL.
> Unfortunately, it turns out that some drivers don't support mid-thread
> preemption for compute workloads.
> If a workload that doesn't support mid-thread
Tested both the patches with drm-tip kernel. Fixes multiple gpu hangs
in vulkan cts and piglit. I will do more thorough testing with updated
version of these patches based on review.
On Wed, Feb 27, 2019 at 7:52 AM Michał Winiarski
wrote:
>
> We assumed that the default preemption granularity
We assumed that the default preemption granularity is fine for ICL.
Unfortunately, it turns out that some drivers don't support mid-thread
preemption for compute workloads.
If a workload that doesn't support mid-thread preemption gets mid-thread
preempted, we're going to observe a GPU hang.
While
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