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- Changed asynch queue insertion and removal to use a lock free algorithm based only on InterlockedCompareExchangePointer. We can now use this lock free approach on IA64 host systems as well.

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- Removed flawed logic which assumed that sim_interval was meaningful when referenced by an asynchronous thread.
- Adjust the event_time of events removed from the asynch queue to account for the average time spent on the queue before the event was noticed by the instruction execution thread.
- Added a sim_activate_notbefore function which specifies an rtime which is the earliest time the event should fire.
- Changed the 'wakeup from idle' logic to force an immediate asynch queue check if the wakeup was not due to a timeout (i.e. it was due to an asynch queue insertion).
- Fixed the descrip.mms to build asynchronous support on AXP and IA64 VMS with kernel threads enabled
This commit is contained in:
Mark Pizzolato
2012-04-04 11:05:24 -07:00
parent 7ac3557524
commit ab3af3062d
8 changed files with 149 additions and 89 deletions
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4
PDP11/pdp11_rq.c
View File

@@ -1794,15 +1794,13 @@ return 0; /* success! */
void rq_io_complete (UNIT *uptr, t_stat status)
{
MSC *cp = rq_ctxmap[uptr->cnum];
int32 elapsed = sim_grtime()-uptr->iostarttime;
sim_debug (DBG_TRC, rq_devmap[cp->cnum], "rq_io_complete(status=%d)\n", status);
uptr->io_status = status;
uptr->io_complete = 1;
/* Reschedule for the appropriate delay */
if (elapsed <= rq_xtime)
sim_activate_abs (uptr, rq_xtime-elapsed);
sim_activate_notbefore (uptr, uptr->iostarttime+rq_xtime);
}
/* Unit service for data transfer commands */

4
PDP11/pdp11_tq.c
View File

@@ -1280,15 +1280,13 @@ return ST_SUC; /* success! */
void tq_io_complete (UNIT *uptr, t_stat status)
{
struct tq_req_results *res = (struct tq_req_results *)uptr->results;
int32 elapsed = sim_grtime()-uptr->iostarttime;
sim_debug(DBG_TRC, &tq_dev, "tq_io_complete(status=%d)\n", status);
res->io_status = status;
res->io_complete = 1;
/* Reschedule for the appropriate delay */
if (elapsed <= tq_xtime)
sim_activate_abs (uptr, tq_xtime-elapsed);
sim_activate_notbefore (uptr, uptr->iostarttime+tq_xtime);
}