The tricky thing about parallelizing workflow apps is that most workflow happens in a pipeline, which fits single cores really well.
It's tricky to find problems that fit into grids.
Pictures are grids, And for computationally intensive tasks that are isolated gpus work greate. But you still have to find a way to make your sums work in a grid if they don't.
Last time I was writing OpenCL the ability for threads to chat with each other was at the entry and exit points which made fitting some problems through parallel architecture very hard.
I think most trouble today comes from the low level imperative & error prone way of expressing computation, it's just prohibitively hard to ensure correctness with today's languages.
If we continue with the aaa games example, we can see that on consoles programmers do manage to extract parallelism even from cpu side work, it just requires a lot of work, debugging grit, tools, talent and budget along with a specific application with limited parameters.
We just need to make this kind of work easier and PLT seems to me the solution.
Comments
The tricky thing about parallelizing workflow apps is that most workflow happens in a pipeline, which fits single cores really well. It's tricky to find problems that fit into grids.
Pictures are grids, And for computationally intensive tasks that are isolated gpus work greate. But you still have to find a way to make your sums work in a grid if they don't. Last time I was writing OpenCL the ability for threads to chat with each other was at the entry and exit points which made fitting some problems through parallel architecture very hard.
I think most trouble today comes from the low level imperative & error prone way of expressing computation, it's just prohibitively hard to ensure correctness with today's languages.
If we continue with the aaa games example, we can see that on consoles programmers do manage to extract parallelism even from cpu side work, it just requires a lot of work, debugging grit, tools, talent and budget along with a specific application with limited parameters.
We just need to make this kind of work easier and PLT seems to me the solution.