RE: [m5-users] Using the SwitchCpu function

Sat, 02 Sep 2006 22:29:29 -0700

I believe the problem here is that cpu and cpu2 need to be part of the system (somewhere) in order to be instantiated by m5’s configuration parsing.  The error that it’s giving you means that you didn’t have those two CPUs as part of the configuration that actually gets instantiated.  Thus when it tries to switch between the CPUs, it finds that the CPUs have no corresponding object within the running instance of m5.  Try making your switch_cpu_list as a child of either the root object or a system object (I believe you should just be able to do “root.switch_cpus = switch_cpu_list” or something along those lines).  I’ll try to clean up the Wiki to clarify that when I get a better example.

 

Kevin

 

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of James Anon
Sent: Friday, September 01, 2006 2:35 PM
To: [email protected]
Subject: [m5-users] Using the SwitchCpu function

 

I am trying to use the m5.switchCpus function to quickly simulate pass the linux booting stage, and then switch to detailed mode after the full system is booted.  I followed the wiki page and have made minor modifications to the fs.py example script including:

cpu = AtomicSimpleCPU()
cpu2 = DetailedO3CPU()
mem_mode = 'timing'
.
.
.

switch_cpu_list = [(cpu,cpu2)]
m5.simulate(3663496423522)
m5.switchCpus(switch_cpu_list)
exit_event = m5.simulate(maxtick)


Most other options I've left the same from the fs.py script, but when I run the simulator, it works perfectly until the switch point and then dies with:

Switching CPUs
Traceback (most recent call last):
  File "<string>", line 1, in ?
  File "build/ALPHA_FS/python/m5/main.py", line 314, in main
    execfile(sys.argv[0], scope)
  File "configs/example/fsSwap.py", line 86, in ?
    m5.switchCpus(switch_cpu_list)
  File "build/ALPHA_FS/python/m5/__init__.py", line 206, in switchCpus
    new_cpu.takeOverFrom(old_cpus[index])
  File "build/ALPHA_FS/python/m5/config.py", line 570, in takeOverFrom
    self._ccObject.takeOverFrom(cpu_ptr)
AttributeError: 'NoneType' object has no attribute 'takeOverFrom'


Is there something I'm forgetting to instantiate?  Any help would be greatly appreciate.

Ps.  Thanks for setting up the WIKI page.  It has been a tremendous help, and in my opinion a great improvement over the documentation that was available for the previous version of m5.  I hope the community continues to add to it! 

_______________________________________________
m5-users mailing list
[email protected]
http://m5sim.org/cgi-bin/mailman/listinfo/m5-users

Reply via email to