commit 6400c9f20c3cdab491cd2aec29cfd2ae632d5046
from: Russ Cox <rsc@swtch.com>
date: Tue Jun 03 04:09:29 2014 UTC

acme: increase timer resolution to 10ms

We ran for a long time with 10ms kernel resolution,
so 10ms user space resolution here should be fine.
Some systems actually provide 1ms sleeps, which
makes this polling use a bit more cpu than we'd like.
Since the timers are for user-visible things, 10ms should
still be far from noticeable.

Reduces acme's cpu usage on Macs when plumber is missing
(and plumbproc is sleeping waiting for it to appear).

LGTM=aram, r
R=r, aram
https://codereview.appspot.com/99570043

commit - 113ea95f7b3b8f2af5e57214fe752c187d35aa19
commit + 6400c9f20c3cdab491cd2aec29cfd2ae632d5046
blob - 35982b787e08c320e86e60dc09fc08033c6b886a
blob + e177713173baf1f9962d0c5966cd01853dccf6bd
--- src/cmd/acme/time.c
+++ src/cmd/acme/time.c
@@ -50,7 +50,7 @@ timerproc(void *v)
 	nt = 0;
 	old = msec();
 	for(;;){
-		sleep(1);	/* will sleep minimum incr */
+		sleep(10);	/* longer sleeps here delay recv on ctimer, but 10ms should not be noticeable */
 		new = msec();
 		dt = new-old;
 		old = new;