PaRSEC TTG: Offload stream reductions #256
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@therault the tests are failing because the madness tag is unavailable. Do you have a tag to use instead? |
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31b2470ca722a6a2d84d4de08d32fb72ae8fdeda
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…On Fri, May 26, 2023 at 2:45 PM Joseph Schuchart ***@***.***> wrote:
@therault <https://github.com/therault> the tests are failing because the
madness tag is unavailable. Do you have a tag to use instead?
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This is needed to work-around missing support for offsetof in virtual classes. Instead we store the pointer to the derived class inside the non-virtual base class. This allows us to store data copies in parsec lifo or lists and get the virtual derived object back. Signed-off-by: Joseph Schuchart <[email protected]>
Signed-off-by: Joseph Schuchart <[email protected]>
When we encounter a streaming terminal we schedule a dedicated reducer task. Subsequent inputs are put into a LIFO. Once the reducer task runs it will process all available inputs for that terminal but will not block waiting for all inputs. In the worst case, we create N tasks (one for each input), likely less. Signed-off-by: Joseph Schuchart <[email protected]>
The thread-local variable was a hack that is not needed anymore, and apparently didn't work properly. Signed-off-by: Joseph Schuchart <[email protected]>
Signed-off-by: Joseph Schuchart <[email protected]>
Signed-off-by: Joseph Schuchart <[email protected]>
Signed-off-by: Joseph Schuchart <[email protected]>
Signed-off-by: Joseph Schuchart <[email protected]>
…puts In the PaRSEC backend, reducer tasks will be treated as any other task and be deferred if there are readers on their first input. All other inputs are read-only and will be handled that way. This avoids extra copies if there are no other writers on these copies. Signed-off-by: Joseph Schuchart <[email protected]>
Signed-off-by: Joseph Schuchart <[email protected]>
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When we encounter a streaming terminal we schedule a dedicated
reducer task. Subsequent inputs are put into a LIFO. Once the
reducer task runs it will process all available inputs for that
terminal but will not block waiting for all inputs. In the
worst case, we create N tasks (one for each input), likely less.
Currently we use the priority of the task we stream into but this should be revisited, maybe a higher priority could be useful.