Re: [Gems-users] GEMS state transition problem

["hongxia sun" <sunhx.seraph@xxxxxxxxx>]

"L2_MigrationDone" is "L2_SomeEvent" or "L2_SomOtherEvent"?

When does the "L2_SomeEvent" and "L2_SomeOtherEvent" happen?

Please pay attention that the transition "1635   1   0    L2Cache  L2_SomeEvent  L2_NP>L2_IM  [0x400, line 0x400]" happened at time 1635.

While the invalid transition also try to happen at time 1635 "Warning: in fn TransitionResult L2Cache_Controller::doTransitionWorker(L2Cache_Event, L2Cache_State, L2Cache_State&, const Ad
dress&) in generated/MSI_MOSI_CMP_directory/L2Cache_Transitions.C:1652: g_eventQueue_ptr->getTime() is 1635".

At cycle 1635, the cache line state keeps as L2_NP but not L2_IM, therefore, event "L2_MigrationDone" cause an invalid transition.




 

在07-1-22，Lei Yang <lya755@xxxxxxxxxxxxxxxxxxxx> 写道：

Dear list,

 

I've been working on a new protocol and I was trying to add new transitions in the MSI_MOSI_CMP_directory protocol like this:

 

transition({L2_I, L2_NP}, L2_SomeEvent, L2_IM) {
    someAction;

}

 

transition(L2_IM, L2_SomeOtherEvent, L2_M) {
    someOtherAction;
  }

However, when testing with a simple trace, I found that although the state of a line appears to have changed from L2_NP to L2_IM, later on when L2_SomeOtherEvent occurs, it refuses to change its state to L2_M and complains about still being in state L2_NP and hence invalid transition, as follows:

 

      1635   1   0    L2Cache  L2_SomeEvent  L2_NP>L2_IM  [0x400, line 0x400]
Warning: in fn TransitionResult L2Cache_Controller::doTransitionWorker(L2Cache_Event, L2Cache_State, L2Cache_State&, const Ad
dress&) in generated/MSI_MOSI_CMP_directory/L2Cache_Transitions.C:1650: m_id is 1
Warning: in fn TransitionResult L2Cache_Controller::doTransitionWorker(L2Cache_Event, L2Cache_State, L2Cache_State&, const Ad
dress&) in generated/MSI_MOSI_CMP_directory/L2Cache_Transitions.C:1651: m_version is 0
Warning: in fn TransitionResult L2Cache_Controller::doTransitionWorker(L2Cache_Event, L2Cache_State, L2Cache_State&, const Ad
dress&) in generated/MSI_MOSI_CMP_directory/L2Cache_Transitions.C:1652: g_eventQueue_ptr->getTime() is 1635
Warning: in fn TransitionResult L2Cache_Controller::doTransitionWorker(L2Cache_Event, L2Cache_State, L2Cache_State&, const Ad
dress&) in generated/MSI_MOSI_CMP_directory/L2Cache_Transitions.C:1653: addr is [0x400, line 0x400]
Warning: in fn TransitionResult L2Cache_Controller::doTransitionWorker(L2Cache_Event, L2Cache_State, L2Cache_State&, const Ad
dress&) in generated/MSI_MOSI_CMP_directory/L2Cache_Transitions.C:1654: event is L2_MigrationDone
Warning: in fn TransitionResult L2Cache_Controller::doTransitionWorker(L2Cache_Event, L2Cache_State, L2Cache_State&, const Ad
dress&) in generated/MSI_MOSI_CMP_directory/L2Cache_Transitions.C:1655: state is L2_NP
Fatal Error: in fn TransitionResult L2Cache_Controller::doTransitionWorker(L2Cache_Event, L2Cache_State, L2Cache_State&, cons
t Address&) in generated/MSI_MOSI_CMP_directory/L2Cache_Transitions.C:1656: Invalid transition

 

I wonder what else is needed to change the state of a line in addition to the transition() statement. Have anyone met with this problem before? Please advice!

 

Thanks a lot!!

 

Lei

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