[ARROW-8847] [C++] Pass task size / metrics in Executor API

• Type: Wish
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/24986
• Assignee: Antoine Pitrou
• Reporter: Antoine Pitrou
• Created: 18/May/20 16:28
• Updated: 11/Jan/23 08:02
• Resolved: 21/May/20 11:56

Description

For now, our ThreadPool implementation would ignore those metrics, but other implementations may use it for custom ordering.

Example metrics:

• IO size (number of bytes)
• CPU cost (~ number of instructions)
• Priority (opaque integer? lower is more urgent)

Issue Links

• links to: GitHub Pull Request #7225