thread.c (consume_communication_pipe): disarm UBF_TIMER before consume

Same reasoning as the disarm in rb_sigwait_fd_get, the current
thread is already processing signals, so we do not need
UBF_TIMER to continually kick the process, anymore.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64390 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/thread.c b/thread.c
index 90cb1c226e..23a4ebf192 100644
--- a/thread.c
+++ b/thread.c
@@ -4269,6 +4269,14 @@ consume_communication_pipe(int fd)
     ssize_t result;
     int ret = FALSE; /* for rb_sigwait_sleep */
 
+    /*
+     * disarm UBF_TIMER before we read, because it can become
+     * re-armed at any time via sighandler and the pipe will refill
+     * We can disarm it because this thread is now processing signals
+     * and we do not want unnecessary SIGVTALRM
+     */
+    ubf_timer_disarm();
+
     while (1) {
 	result = read(fd, buff, sizeof(buff));
 	if (result > 0) {