Module: xenomai-forge
Branch: next
Commit: 5be3e8439fe7ecbe0035d8caed4c3828d89d2bdd
URL:
http://git.xenomai.org/?p=xenomai-forge.git;a=commit;h=5be3e8439fe7ecbe0035d8caed4c3828d89d2bdd
Author: Philippe Gerum <r...@xenomai.org>
Date: Sat Jul 19 09:51:13 2014 +0200
drivers/autotune: fix wedge detection
---
kernel/drivers/autotune/autotune.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/kernel/drivers/autotune/autotune.c
b/kernel/drivers/autotune/autotune.c
index b1f2ddf..d73d0ac 100644
--- a/kernel/drivers/autotune/autotune.c
+++ b/kernel/drivers/autotune/autotune.c
@@ -427,8 +427,13 @@ static int tune_gravity(struct gravity_tuner *tuner, int
period)
if (ret)
goto fail;
- minlat = state->min_lat;
- if (minlat <= 0) {
+ if (state->min_lat <= 0) {
+ printk(XENO_WARN
+ "auto-tuning[%s]: early shot by %Ld ns"
+ ": disabling gravity\n",
+ tuner->name,
+ xnclock_ticks_to_ns(&nkclock, state->min_lat));
+ gravity = 0;
minlat = 0;
goto done;
}
@@ -445,7 +450,7 @@ static int tune_gravity(struct gravity_tuner *tuner, int
period)
"at wedge (min_ns %Ld => %Ld), gravity reset to
%Ld ns\n",
tuner->name,
xnclock_ticks_to_ns(&nkclock, minlat),
- xnclock_ticks_to_ns(&nkclock, minlat),
+ xnclock_ticks_to_ns(&nkclock, state->min_lat),
xnclock_ticks_to_ns(&nkclock, gravity));
#endif
if (++wedge >= 5)
@@ -459,6 +464,7 @@ static int tune_gravity(struct gravity_tuner *tuner, int
period)
* more, increase the gravity value by a 3rd for next
* round.
*/
+ minlat = state->min_lat;
adjust = (long)xnarch_llimd(minlat, 2, 3);
if (adjust == 0)
goto done;
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