gdb won't be that helpful here. When "fatal" is called, it doesn't cause the program to immediately exit with an error with the stack intact, it returns more gracefully and unwinds the stack. If you change it to "panic" you'd be able to get a stack. But really, I don't think the stack will be very useful since the error message is telling you most of what you need to know, that a port wasn't connected that should have been. The only thing you might still need to know is -which- port is unconnected, and it should be pretty easy to add that to the call to fatal. In fact, it's probably a good idea to add that information to the message in the main repository since it would almost always be useful. Would you mind making that change and submitting it to review board?
Gabe On 05/07/11 12:34, reena panda wrote: > Hi Korey, > > Thanks for replying. I tried doing a backtrace on gdb, but it says no > stack. > 0: system.remote_gdb.listener: listening for remote gdb #0 on port 7002 > fatal: default_port: Unconnected port! > @ cycle 0 > [blowUp:build/ALPHA_SE/mem/port.cc, line 47] > Memory Usage: 2160736 KBytes > For more information see: http://www.m5sim.org/fatal/a98d4a8d > > Program exited with code 01. > (gdb) backtrace > No stack. > > Why is it so? > > Thanks > > On Sat, May 7, 2011 at 1:47 PM, Korey Sewell <[email protected] > <mailto:[email protected]>> wrote: > > I havent done anything with InOrder and switchcpus so unless > someone has a patch you'll have to look into adding that code. > > I anticipate it's the same (or similar code) from O3CPU's > "takeOverFrom" function. You need to figure out what's the > function call causing that fatal command (gdb backtrace) and then > figure out how to implement the takeOverFrom function in InOrder. > If you try, and have some problems, forward those emails to m5-dev. > > Typically, what needs to happen is the cache ports in the > AtomicCPU needs to be reconnected to the ports in the InOrder so > you can run successfully after the switch. It sounds like this may > be a symptom of that not working. > > On Sat, May 7, 2011 at 2:05 PM, reena panda <[email protected] > <mailto:[email protected]>> wrote: > > Hi, > I am trying to run m5 in the SE mode, for inorder CPU model. I > am trying to run SPEC2k6 benchmarks. If I run the benchmark, > with only max-insts option set like follows, it runs to the > max insts and quits. > ./build/ALPHA_SE/m5.opt ./configs/spec2006/se.py --inorder > --caches --l2cache -n 1 --maxinsts 100 --bench mcf > > But, I want to be able to fast forward some number of > instructions in atomic mode, then warm up in timing mode and > then switch to inorder mode for simulation. If I use the > command line :- > ./build/ALPHA_SE/m5.opt --stats-file=mcf_inorder > ./configs/spec2006/se.py --inorder --caches --l2cache -n 1 > --fast-forward=5000 --maxinsts 100 -s --bench mcf > > I get the following error:- What might be the issue or what I > am doing wrong here? > > *Global frequency set at 1000000000000 ticks per second > 0: system.remote_gdb.listener: listening for remote gdb #0 on > port 7002 > fatal: default_port: Unconnected port! > @ cycle 0 > [blowUp:build/ALPHA_SE/mem/port.cc, line 47] > Memory Usage: 2159556 KBytes > For more information see: http://www.m5sim.org/fatal/a98d4a8d* > > The following changes were made to the Simulation.py file:- > > if options.standard_switch: > switch_cpus = [TimingSimpleCPU(defer_ > registration=True, cpu_id=(np+i)) > for i in xrange(np)] > switch_cpus_1 = [InOrderCPU(defer_registration=True, > cpu_id=(2*np+i)) > for i in xrange(np)] > > for i in xrange(np): > switch_cpus[i].system = testsys > switch_cpus_1[i].system = testsys > > ..... > > # simulation period > if options.maxinsts: > switch_cpus_1[i].max_insts_all_threads = > options.maxinsts > > Thanks, > Reena > > _______________________________________________ > m5-users mailing list > [email protected] <mailto:[email protected]> > http://m5sim.org/cgi-bin/mailman/listinfo/m5-users > > > > > -- > - Korey > > _______________________________________________ > m5-users mailing list > [email protected] <mailto:[email protected]> > http://m5sim.org/cgi-bin/mailman/listinfo/m5-users > > > > _______________________________________________ > m5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
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