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* Reduced the effects of "priority boost on sem release" to a minimum;

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the thread priority is now increased by one, we'll see how that turns
  out for real (I'm not even convinced that this feature is a good idea
  at all yet).
* Enabled debugging the last semaphore acquirer by default.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16744 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2006-03-12 17:24:31 +00:00
parent f025cd8b72
commit b0976eac74
1 changed files with 3 additions and 4 deletions
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7
src/system/kernel/sem.c
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@ -36,7 +36,7 @@
# define TRACE(x) ;
#endif
//#define DEBUG_LAST_ACQUIRER
#define DEBUG_LAST_ACQUIRER
struct sem_entry {
sem_id id;
@ -713,10 +713,9 @@ release_sem_etc(sem_id id, int32 count, uint32 flags)
GRAB_THREAD_LOCK();
while ((thread = thread_dequeue(&releaseQueue)) != NULL) {
// temporarily place thread in a run queue with high priority to boost it up
// TODO: isn't realtime priority a bit too much??
// temporarily place thread in a run queue with a higher priority to boost it up
thread->next_priority = thread->priority >= B_FIRST_REAL_TIME_PRIORITY ?
thread->priority : B_FIRST_REAL_TIME_PRIORITY - 1;
thread->priority : thread->priority + 1;
scheduler_enqueue_in_run_queue(thread);
}
if ((flags & B_DO_NOT_RESCHEDULE) == 0)