Kernel: per-process sleep time

Change-Id: I6e08e7db155ed6d51002f0993dbef29ca6d926d1

diff --git a/minix/kernel/proc.c b/minix/kernel/proc.c
index 7076023cd656dc1dd35210b4b7ebee8670cd4d3f..5ca6474ad25c36a31e47c3e1e3e5442498c80388 100644 (file)
--- a/minix/kernel/proc.c
+++ b/minix/kernel/proc.c
@@ -1774,6 +1774,8 @@ void dequeue(struct proc *rp)
        rp->p_accounting.enter_queue = 0;
   }
 
+  /* For ps(1), remember when the process was last dequeued. */
+  rp->p_dequeued = get_monotonic();
 
 #if DEBUG_SANITYCHECKS
   assert(runqueues_ok_local());

diff --git a/minix/kernel/proc.h b/minix/kernel/proc.h
index 76850cb386047d157d185d5091ca6627aebbbaf2..200c3bdfa9b03a129eda29aeadf659f74c3ec74b 100644 (file)
--- a/minix/kernel/proc.h
+++ b/minix/kernel/proc.h
@@ -54,6 +54,8 @@ struct proc {
        unsigned long preempted;
   } p_accounting;
 
+  clock_t p_dequeued;          /* uptime at which process was last dequeued */
+
   clock_t p_user_time;         /* user time in ticks */
   clock_t p_sys_time;          /* sys time in ticks */