* thread_pthread.c: Stop polling in the timer thread when there are

  no waiting thread.  If there are 2 or more runnable threads,
  the timer thread does polling.  Avoid polling makes power save
  for several computers (0.2W per a Ruby process, when I measured).
  If outside-event such as signal or Thread#kill was occuerred
  when the timer thread does not do polling, then wake-up
  the timer thread using communication-pipe (the timer thread
  waits this communication-pipe with select(2)).
  The discussion about this modification can be found from the post
  [ruby-core:33456] and other related posts.
  Note that Eric Wong and KOSAKI Motohiro give us the huge
  contributions for this modification.  Thanks.
* thread_pthread.c (rb_thread_wakeup_timer_thread): add a function.
  This function wakes up the timer thread using communication-pipe.
* thread.c (rb_thread_stop_timer_thread): add a parameter which
  specify closing communication-pipe or not.
* thread.c (rb_thread_terminate_all): do not stop timer thread here
  (ruby_cleanup() terminate timer thread).
* signal.c: wake up timer thread using
  rb_thread_wakeup_timer_thread() from signal handler.
* eval.c (ruby_cleanup): use rb_thread_stop_timer_thread(1).
* process.c: use rb_thread_stop_timer_thread(0)
  (reuse communication-pipe).
* thread_win32.c (rb_thread_wakeup_timer_thread): add a dummy
  function.
* vm_core.h: add and fix decl. of functions.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32244 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/signal.c b/signal.c
index 2e9f4f5aff..774cdad303 100644
--- a/signal.c
+++ b/signal.c
@@ -507,6 +507,7 @@ sighandler(int sig)
 {
     ATOMIC_INC(signal_buff.cnt[sig]);
     ATOMIC_INC(signal_buff.size);
+    rb_thread_wakeup_timer_thread();
 #if !defined(BSD_SIGNAL) && !defined(POSIX_SIGNAL)
     ruby_signal(sig, sighandler);
 #endif