Fix: Incorrectly expressed PGM adjustment thresh.

PGM release/deadline adjustment is ignored if the difference between
an adjusted time and current time falls below a given threshold.
This threshold is supposed to be 200us, but was actually 200ns.
This patch resolves this--threshold is now propertly 200us.

1 files changed, 5 insertions, 5 deletions

diff --git a/litmus/pgm.c b/litmus/pgm.c
index 2bfa8d0843c1..0bc190851718 100644
--- a/litmus/pgm.c
+++ b/litmus/pgm.c
@@ -9,8 +9,8 @@
 /* Only readjust release/deadline if difference is over a given threshold.
    It's a weak method for accounting overheads. Ideally, we'd know the last
    time t was woken up by its last predecessor, rather than having to look
-   at 'now'. */
-#define ADJUSTMENT_THRESH_US 200
+   at 'now'. Adjustment threshold currently set to 200us. */
+#define ADJUSTMENT_THRESH_NS (200*1000LL)
 
 void setup_pgm_release(struct task_struct* t)
 {
@@ -29,8 +29,8 @@ void setup_pgm_release(struct task_struct* t)
            This is possible since PGM jobs are early-released. Don't shift our
            deadline if we got the tokens earlier than expected. */
         if (now > tsk_rt(t)->job_params.release) {
-                long long diff = now - tsk_rt(t)->job_params.release;
-                if (diff > ADJUSTMENT_THRESH_US) {
+                long long diff_ns = now - tsk_rt(t)->job_params.release;
+                if (diff_ns > ADJUSTMENT_THRESH_NS) {
                         lt_t adj_deadline = now + get_rt_relative_deadline(t);
 
                         TRACE_TASK(t, "adjusting PGM release time from (r = %llu, d = %llu) "
@@ -44,7 +44,7 @@ void setup_pgm_release(struct task_struct* t)
                 }
                 else {
                         TRACE_TASK(t, "adjustment falls below threshold. %lld < %lld\n",
-                                diff, ADJUSTMENT_THRESH_US);
+                                diff_ns, ADJUSTMENT_THRESH_NS);
                 }
         }
         else {