Hi everyone,
I am using the --repeat-switch option to switch the cpu's between O3 and timing
modes every N cycles. Now I want to reproduce the same behavior but switching
the cpu's every M instructions (instead of every N cycles). I hope someone
could help me or give me a hint of what is better to do.
I did these few changes on Simulation.py
def repeatSwitch(testsys, repeat_switch_cpu_list, maxtick, switch_freq):
print "starting switch loop"
while True:
exit_event = m5.simulate()
exit_cause = exit_event.getCause()
if exit_cause != "all threads reached the max instruction count":
return exit_event
m5.switchCpus(testsys, repeat_switch_cpu_list)
tmp_cpu_list = []
for old_cpu, new_cpu in repeat_switch_cpu_list:
tmp_cpu_list.append((new_cpu, old_cpu))
repeat_switch_cpu_list = tmp_cpu_list
if (maxtick - m5.curTick()) <= switch_freq:
exit_event = m5.simulate(maxtick - m5.curTick())
return exit_event
...
...
def run(options, root, testsys, cpu_class):
...
...
for i in xrange(np):
repeat_switch_cpus[i].system = testsys
repeat_switch_cpus[i].workload = testsys.cpu[i].workload
repeat_switch_cpus[i].clk_domain = testsys.cpu[i].clk_domain
repeat_switch_cpus[i].max_insts_all_threads = 100000 # Number of O3
instructions
testsys.cpu[i].max_insts_all_threads = 900000 # Number of timing
instructions
My implementation works only in the first iteration, after that I don't have
any control on the number of intruccions simulated by either cpu mode. This is
because those events are scheduled only once in the constructor of the cpu.
I tried to schedule a new event rigth after the cpu's are switched (
comInstEventQueue[tid]->schedule(event, maxInst) ) but maxInst needs to be
greater than curTick(), which is not the case.
Is this the right approach to do this? What am I doing wrong? Any other idea?
Any comments will be helpful and appreciated.
Thanks
--
Alberto Javier Naranjo-Carmona
M.S. Student Computer Engineering
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