Chapel Wish List

[ronawho]

This is just a meta issue to link to bugs/features that are important to Chapel so that it's easy to see at a glance the things we care about.

High Priority:

• Tune distrib scheduler performance (Tune distrib scheduler performance #39)

Medium Priority:

• Ability to call a function on each worker thread (Call a function on each hardware thread #52)
• Support different yielding policies (Support different yielding policies #140)
• Improve "vector" task spawn performance (Improve "vector" task spawn performance #47)

Low Priority:

• Deschedule sleeping qthreads (Deschedule sleeping qthreads #43)
• Improve performance of "thread-ring" benchmark (Improve performance of "thread-ring" benchmark #48)
• Speed up build times (Speed up build times #44)

---

Done:

• Sleep syscall implementation is buggy (Sleep syscall implementation is buggy #37)
• Have idle workers use a hybrid spin/condwait scheme (Have idle workers use a hybrid spin/condwait scheme #38)
• Add support for custom memory allocators (Add support for custom memory allocators #40)
• Improve hwloc link args configuration (hwloc configure check should use libtool for link args #56)
• Add ability to "reset" task spawn order (Add ability to "reset" task spawn order #42)
• Sync vars serialize execution (Sync vars serialize execution for schedulers w/o work-stealing #63)
• Add ability to specify explicit CPU bindings (Add ability to specify explicit CPU bindings #46)

No longer needed:

• Improve Cygwin portability [Improve Cygwin portability #49]
• Cache guard pages (Cache guard pages #45)
• Improve startup times when topo=hwloc (Improve startup times when hwloc is used #41)