Lisp in Parallel : lparallel

• added function task-categories-running
• new special variable *debug-tasks-p* — setting it to false will transfer errors instead of invoking the debugger inside tasks; default is true
• added convenience function invoke-transfer-error for local control over debugging tasks:
  (task-handler-bind ((error #'invoke-transfer-error)) ...)
(task-handler-bind ((error #'invoke-debugger)) ...)

• new support for fine-grained parallelism with `defpun’
• new work-stealing model with lockless queues and optional spinning; enabled by default on SBCL, others default to central queue
• added pfind, pcount, plet-if, pfuncall
• fixed redundant restart in `chain’
• `fulfill’ now accepts non-promises (never succeeds)
• removed high optimizations exposed in some API functions
• added shell script for unthrottling CPUs in Linux
• renamed *kernel-task-category* -> *task-category*, *kernel-task-priority* -> *task-priority*, kernel-handler-bind -> task-handler-bind, preduce/partial -> preduce-partial; old names are still available

• added function cancel-timeout; submit-timeout now returns a timeout object
• renamed emergency-kill-tasks to kill-tasks; old name is still available
• minor optimization to ptrees
• added type checks to psort arguments
• switched test framework to eos

• added :wait option to end-kernel — blocks until the kernel has shut down
  (please read the documentation for end-kernel before using)
• bound *print-circle* to t when printing a kernel — avoids SBCL + SLIME
  crash when evaluating the single form (setf *kernel* (make-kernel …))

(ql:quickload :lparallel)

lparallel is a new library for parallelism in Common Lisp.

The buttons at the top link to everything you need to know about lparallel.