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.cc

diff --git a/src/thread.cc b/src/thread.cc
index 67773a5..0551844 100644
--- a/src/thread.cc
+++ b/src/thread.cc
@@ -555,7 +555,7 @@
   }
 }
 
-bool Thread::RequestCheckpoint(CheckpointFunction* function) {
+bool Thread::RequestCheckpoint(Closure* function) {
   CHECK(!ReadFlag(kCheckpointRequest)) << "Already have a pending checkpoint request";
   checkpoint_function_ = function;
   union StateAndFlags old_state_and_flags = state_and_flags_;