commit 0e4627e593bc39f8e3d89c31f8977d55054c07cc
author Mathieu Chartier <mathieuc@google.com> Tue Oct 23 16:13:36 2012 -0700
committer Mathieu Chartier <mathieuc@google.com> Fri Oct 26 12:00:03 2012 -0700
tree 1d69558732c0c916e51a530985a26d4235ef0e6c
parent 9281f004db3f194930ef34d31e5d80c98341f38f

Add thread pool class

Added a thread pool class loosely based on google3 code.

Modified the compiler to have a single thread pool instead of creating new threads in ForAll.

Moved barrier to be in top level directory as it is not GC specific code.

Performance Timings:

Reference:
boot.oat: 14.306596s
time mm oat-target:
real    2m33.748s
user    10m23.190s
sys 5m54.140s

Thread pool:
boot.oat: 13.111049s
time mm oat-target:
real    2m29.372s
user    10m3.130s
sys 5m46.290s

The speed increase is probably just noise.

Change-Id: If3c1280cbaa4c7e4361127d064ac744ea12cdf49

src/thread_list.h

diff --git a/src/thread_list.h b/src/thread_list.h
index a41fa57..d64183b 100644
--- a/src/thread_list.h
+++ b/src/thread_list.h
@@ -57,7 +57,7 @@
 
   // Run a checkpoint on threads, running threads are not suspended but run the checkpoint inside
   // of the suspend check. Returns how many checkpoints we should expect to run.
-  size_t RunCheckpoint(Thread::CheckpointFunction* checkpoint_function);
+  size_t RunCheckpoint(Closure* checkpoint_function);
       LOCKS_EXCLUDED(Locks::thread_list_lock_,
                      Locks::thread_suspend_count_lock_);