On Fri, May 03, 2019 at 03:12:01PM +0100, Chris Wilson wrote:
> Quoting Ville Syrjälä (2019-05-03 15:04:57)
> > On Mon, Apr 29, 2019 at 07:00:19PM +0100, Chris Wilson wrote:
> > > Asking the GPU to busywait on a memory address, perhaps not unexpectedly
> > > in hindsight for a shared system, leads
Quoting Ville Syrjälä (2019-05-03 15:04:57)
> On Mon, Apr 29, 2019 at 07:00:19PM +0100, Chris Wilson wrote:
> > Asking the GPU to busywait on a memory address, perhaps not unexpectedly
> > in hindsight for a shared system, leads to bus contention that affects
> > CPU programs trying to
On Mon, Apr 29, 2019 at 07:00:19PM +0100, Chris Wilson wrote:
> Asking the GPU to busywait on a memory address, perhaps not unexpectedly
> in hindsight for a shared system, leads to bus contention that affects
> CPU programs trying to concurrently access memory. This can manifest as
> a drop in
On 29/04/2019 19:00, Chris Wilson wrote:
Asking the GPU to busywait on a memory address, perhaps not unexpectedly
in hindsight for a shared system, leads to bus contention that affects
CPU programs trying to concurrently access memory. This can manifest as
a drop in transcode throughput on
Quoting Tvrtko Ursulin (2019-04-30 09:55:59)
>
> On 29/04/2019 19:00, Chris Wilson wrote:
> So I am still leaning towards being cautious and just abandoning
> semaphores for now.
Fwiw, we have another 4 weeks to pull the plug for 5.2.
-Chris
___
Quoting Tvrtko Ursulin (2019-04-30 09:55:59)
>
> On 29/04/2019 19:00, Chris Wilson wrote:
> > Asking the GPU to busywait on a memory address, perhaps not unexpectedly
> > in hindsight for a shared system, leads to bus contention that affects
> > CPU programs trying to concurrently access memory.
On 29/04/2019 19:00, Chris Wilson wrote:
Asking the GPU to busywait on a memory address, perhaps not unexpectedly
in hindsight for a shared system, leads to bus contention that affects
CPU programs trying to concurrently access memory. This can manifest as
a drop in transcode throughput on
Asking the GPU to busywait on a memory address, perhaps not unexpectedly
in hindsight for a shared system, leads to bus contention that affects
CPU programs trying to concurrently access memory. This can manifest as
a drop in transcode throughput on highly over-saturated workloads.
The only clue
