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authorKe Meng <mengke97@hotmail.com>2008-01-14 11:47:32 -0500
committerKe Meng <mengke97@hotmail.com>2008-01-14 11:47:32 -0500
commit0b6876a0c0a999410311e0397d366a47728d749a (patch)
treec0de8c76dff0105fd0aac13f5896163f1bea0403 /tests/quick/00.hello/ref
parentc08b7802a9caa7823e75a71839bac14a65a3102b (diff)
downloadgem5-0b6876a0c0a999410311e0397d366a47728d749a.tar.xz
The reason is that the event is supposed to put the instructions ready to execute for next cycle. And the FUCompletion event has a lower priority than CPU tick event. It is called after the iew->tick() for current cycle has already been executed and the issueToExecuteQueue has already advanced this time. And assume the issueToExecuteLatency is 1, to catch up, the increasement should be made at access(-1) instead of access(0). Otherwise I found it could increase the actual op_latency of the instructions to execute by 1 cycle and potentially put the simulated CPU into a permanent idle state.
Signed-off by: Ali Saidi <saidi@eecs.umich.edu> --HG-- extra : convert_revision : dafc16814383e8e8f8320845edf6ab2bcfed1e1d
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