[Gems-users] Is GEMS deterministic or NOT?

[Guoqiang Yang <nkyangguoqiang@xxxxxxxxx>]

Hi there,

I guess I have a question about whether GEMS is deterministic or NOT. To 
be precise, if I run exactly the same simulation multiple times, will I 
get the same result all the time?
Also, when I try to run the SPEC OpenMP benchmark suite, applu benchmark 
ends up with Invalid Transition. And the debugging information is given 
below, I am kind of wondering why that particular directory entry state 
is not defined? I would really really appreciate it if someone could 
kindly help me to figure this out.
===========================================
Warning: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:284: m_id is 0
Warning: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:284: m_id is 0
Warning: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:285: m_version is 0
Warning: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:285: m_version is 0
Warning: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:286: 
g_eventQueue_ptr->getTime() is 29912381
Warning: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:286: 
g_eventQueue_ptr->getTime() is 29912381
Warning: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:287: addr is 
[0x70de1800, line 0x70de1800]
Warning: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:287: addr is 
[0x70de1800, line 0x70de1800]
Warning: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:288: event is 
PUTX_Owner
Warning: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:288: event is 
PUTX_Owner
Warning: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:289: state is
Warning: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:289: state is
Fatal Error: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:290: Invalid 
transition
Fatal Error: in fn TransitionResult 
Directory_Controller::doTransitionWorker(Directory_Event, 
Directory_State, Directory_State&, const Address&) in 
generated/MSI_MOSI_CMP_directory/Directory_Transitions.C:290: Invalid 
transition
Abort (SIGABRT) in main thread
The simulation state has been corrupted. Simulation cannot continue.
Please restart Simics.
===========================================

Many thanks,

Guoqiang Yang