On 03/19/2018 10:02 AM, Tom de Vries wrote:
> On 03/19/2018 03:55 PM, Cesar Philippidis wrote:
>>> Note that this changes ordering of the vector-neutering jump and
>>> worker-neutering jump at the end. In principle, this should not be
>>> harmful, but it violates the invariant that vector-neutering
On 03/19/2018 03:55 PM, Cesar Philippidis wrote:
Note that this changes ordering of the vector-neutering jump and
worker-neutering jump at the end. In principle, this should not be
harmful, but it violates the invariant that vector-neutering
branch-around code should be as short-lived as possible
On 03/19/2018 03:55 PM, Cesar Philippidis wrote:
Is your patch purely for debugging, or are you planning on committing it
to og7 and trunk?
I plan to commit it.
We have no test-cases testing the neutering code order explicitly. So
this check is the only thing that allows us to detect regressi
On 03/19/2018 07:04 AM, Tom de Vries wrote:
> On 03/09/2018 05:55 PM, Cesar Philippidis wrote:
>> On 03/09/2018 08:21 AM, Tom de Vries wrote:
>>> On 03/09/2018 12:31 AM, Cesar Philippidis wrote:
Nvidia Volta GPUs now support warp-level synchronization.
>>>
>>> Well, let's try to make that stat
On 03/09/2018 05:55 PM, Cesar Philippidis wrote:
On 03/09/2018 08:21 AM, Tom de Vries wrote:
On 03/09/2018 12:31 AM, Cesar Philippidis wrote:
Nvidia Volta GPUs now support warp-level synchronization.
Well, let's try to make that statement a bit more precise.
All Nvidia architectures have sup
On 03/09/2018 08:21 AM, Tom de Vries wrote:
> On 03/09/2018 12:31 AM, Cesar Philippidis wrote:
>> Nvidia Volta GPUs now support warp-level synchronization.
>
> Well, let's try to make that statement a bit more precise.
>
> All Nvidia architectures have supported synchronization of threads in a
>
On 03/09/2018 12:31 AM, Cesar Philippidis wrote:
Nvidia Volta GPUs now support warp-level synchronization.
Well, let's try to make that statement a bit more precise.
All Nvidia architectures have supported synchronization of threads in a
warp on a very basic level: by means of convergence (an
Nvidia Volta GPUs now support warp-level synchronization. As such, the
semantics of legacy bar.sync instructions have slightly changed on newer
GPUs. The PTX JIT will now, occasionally, emit a warpsync instruction
immediately before a bar.sync for Volta GPUs. That implies that warps
must be converg
