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
diff --git a/src/cmd/acme/time.c b/src/cmd/acme/time.c
index 35982b7..e177713 100644
--- a/src/cmd/acme/time.c
+++ b/src/cmd/acme/time.c
@@ -50,7 +50,7 @@
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;
