Hello, The concerned file is configs/common/Simulation.py. Probably the mix "--repeat-switch=1000000000 --cpu-type=atomic --restore-with-cpu=timing" is not well supported/tested.
Regards, -- Fernando A. Endo, Post-doc INRIA Rennes-Bretagne Atlantique France 2016-05-04 12:26 GMT+02:00 Tanmay Gangwani <[email protected]>: > Hi, > > I have a multi-threaded program which runs great on GEM5 with : > > --cpu-type=timing, or > > --cpu-type=atomic > > I have now been trying to run the same code, but with periodic repeated > switching between the timing and atomic type CPUs. Here's my command line - > > *./build/X86/gem5.opt configs/example/se.py --repeat-switch=1000000000 > --cpu-type=atomic --restore-with-cpu=timing --checkpoint-restore=1 --caches > -n64 --mem-size=8GB -c <application-64-threads>* > > The code runs for a while, but then I get a segmentation fault. A run > under GDB tells me that this happens at - > > *0x000000000068ee86 in MasterPort::sendAtomic(Packet*) () at > build/X86/mem/port.cc:168* > > *168 return _slavePort->recvAtomic(pkt);* > > > *(gdb) bt* > > *#0 0x000000000068ee86 in MasterPort::sendAtomic(Packet*) () at > build/X86/mem/port.cc:168* > > *#1 0x00000000005736ef in AtomicSimpleCPU::tick() () at > build/X86/cpu/simple/atomic.cc:615* > > *#2 0x00000000008000c1 in EventQueue::serviceOne() () at > build/X86/sim/eventq.cc:228* > > *#3 0x0000000000820c18 in doSimLoop(EventQueue*) () at > build/X86/sim/simulate.cc:218* > > > Could someone confirm if this is the best way to switch between timing and > atomic models? > > Any pointers on which source files to start from to debug this? > > Also, I sometimes get the following print on the console when the > simulator switches from atomic to timing: > > *WARNING: Bank is already active!* > > *Command: 0, Timestamp: 6448, Bank: 4* > > *WARNING: Bank is already active!* > > *Command: 0, Timestamp: 8074, Bank: 2* > > *WARNING: Bank is already active!* > > *Command: 0, Timestamp: 6860, Bank: 1* > > > Thanks. > > _______________________________________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >
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