1# Copyright (c) 2012 ARM Limited 2# All rights reserved. 3# 4# The license below extends only to copyright in the software and shall 5# not be construed as granting a license to any other intellectual 6# property including but not limited to intellectual property relating 7# to a hardware implementation of the functionality of the software 8# licensed hereunder. You may use the software subject to the license --- 56 unchanged lines hidden (view full) --- 65 66 def next(self): 67 self.cur_cpu = (self.cur_cpu + 1) % len(self.cpus) 68 return self.cpus[self.cur_cpu] 69 70 def first(self): 71 return self.cpus[self.first_cpu] 72 |
73def run_test(root, switcher=None, freq=1000, verbose=False): |
74 """Test runner for CPU switcheroo tests. 75 76 The switcheroo test runner is used to switch CPUs in a system that 77 has been prepared for CPU switching. Such systems should have 78 multiple CPUs when they are instantiated, but only one should be 79 switched in. Such configurations can be created using the 80 base_config.BaseFSSwitcheroo class. 81 --- 4 unchanged lines hidden (view full) --- 86 Unlike most other test runners, this one automatically configures 87 the memory mode of the system based on the first CPU the switcher 88 reports. 89 90 Keyword Arguments: 91 switcher -- CPU switcher implementation. See Sequential for 92 an example implementation. 93 period -- Switching frequency in Hz. |
94 verbose -- Enable output at each switch (suppressed by default). |
95 """ 96 97 if switcher == None: 98 switcher = Sequential(root.system.cpu) 99 100 current_cpu = switcher.first() 101 system = root.system 102 system.mem_mode = type(current_cpu).memory_mode() 103 |
104 # Suppress "Entering event queue" messages since we get tons of them. 105 # Worse yet, they include the timestamp, which makes them highly 106 # variable and unsuitable for comparing as test outputs. 107 m5.internal.core.cvar.want_info = verbose 108 |
109 # instantiate configuration 110 m5.instantiate() 111 112 # Determine the switching period, this has to be done after 113 # instantiating the system since the time base must be fixed. 114 period = m5.ticks.fromSeconds(1.0 / freq) 115 while True: 116 exit_event = m5.simulate(period) 117 exit_cause = exit_event.getCause() 118 119 if exit_cause == "simulate() limit reached": 120 next_cpu = switcher.next() 121 |
122 if verbose: 123 print "Switching CPUs..." 124 print "Next CPU: %s" % type(next_cpu) |
125 m5.drain(system) 126 if current_cpu != next_cpu: 127 m5.switchCpus(system, [ (current_cpu, next_cpu) ], |
128 do_drain=False, verbose=verbose) |
129 else: 130 print "Source CPU and destination CPU are the same, skipping..." 131 m5.resume(system) 132 current_cpu = next_cpu 133 elif exit_cause == "target called exit()" or \ 134 exit_cause == "m5_exit instruction encountered": 135 136 sys.exit(0) 137 else: 138 print "Test failed: Unknown exit cause: %s" % exit_cause 139 sys.exit(1) |