changeset cc7a6660c8b7 in /z/repo/gem5
details: http://repo.gem5.org/gem5?cmd=changeset;node=cc7a6660c8b7
description:
mem: Add check if SimpleDRAM nextReqEvent is scheduled
This check covers a case where a retry is called from the SimpleDRAM
causing a new request to appear before the DRAM itself schedules a
nextReqEvent. By adding this check, the event is not scheduled twice.
diffstat:
src/mem/simple_dram.cc | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diffs (17 lines):
diff -r 3f70fc65b14c -r cc7a6660c8b7 src/mem/simple_dram.cc
--- a/src/mem/simple_dram.cc Fri Mar 01 13:20:32 2013 -0500
+++ b/src/mem/simple_dram.cc Fri Mar 01 13:20:33 2013 -0500
@@ -396,8 +396,11 @@
}
// Once you're done emptying the write queue, check if there's
- // anything in the read queue, and call schedule if required
- schedule(nextReqEvent, busBusyUntil);
+ // anything in the read queue, and call schedule if required. The
+ // retry above could already have caused it to be scheduled, so
+ // first check
+ if (!nextReqEvent.scheduled())
+ schedule(nextReqEvent, busBusyUntil);
}
void
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