thread_pthread.c: reduce ubf_timer arming for non-signal wakeups

We do not need to rely on SIGVTALRM for non-sighandler wakeups.
This will reduce spurious wakeups in cases where sigwait_fd
is not grabbed again, soon.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64389 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 0 deletions

diff --git a/process.c b/process.c
index 5c099acb89..462a239d5e 100644
--- a/process.c
+++ b/process.c
@@ -1162,6 +1162,10 @@ waitpid_nogvl(void *x)
             /* another thread calling rb_sigwait_sleep will process
              * signals for us */
             if (SIGCHLD_LOSSY) {
+                /*
+                 * XXX this may not be needed anymore with new GVL
+                 * and sigwait_fd usage
+                 */
                 rb_thread_wakeup_timer_thread(0);
             }
             rb_native_cond_wait(w->cond, &th->interrupt_lock);