diff options
Diffstat (limited to 'configs/example/apu_se.py')
| -rw-r--r-- | configs/example/apu_se.py | 153 |
1 files changed, 115 insertions, 38 deletions
diff --git a/configs/example/apu_se.py b/configs/example/apu_se.py index 27a26071b..a044c9a43 100644 --- a/configs/example/apu_se.py +++ b/configs/example/apu_se.py @@ -150,6 +150,10 @@ parser.add_option("--numLdsBanks", type="int", default=32, help="number of physical banks per LDS module") parser.add_option("--ldsBankConflictPenalty", type="int", default=1, help="number of cycles per LDS bank conflict") +parser.add_option('--fast-forward-pseudo-op', action='store_true', + help = 'fast forward using kvm until the m5_switchcpu' + ' pseudo-op is encountered, then switch cpus. subsequent' + ' m5_switchcpu pseudo-ops will toggle back and forth') Ruby.define_options(parser) @@ -280,47 +284,67 @@ cp_list = [] # List of CPUs cpu_list = [] -# We only support timing mode for shader and memory +CpuClass, mem_mode = Simulation.getCPUClass(options.cpu_type) +if CpuClass == AtomicSimpleCPU: + fatal("AtomicSimpleCPU is not supported") +if mem_mode != 'timing': + fatal("Only the timing memory mode is supported") shader.timing = True -mem_mode = 'timing' -# create the cpus -for i in range(options.num_cpus): - cpu = None - if options.cpu_type == "detailed": - cpu = DerivO3CPU(cpu_id=i, - clk_domain = SrcClockDomain( - clock = options.CPUClock, - voltage_domain = VoltageDomain( - voltage = options.cpu_voltage))) - elif options.cpu_type == "timing": - cpu = TimingSimpleCPU(cpu_id=i, - clk_domain = SrcClockDomain( - clock = options.CPUClock, - voltage_domain = VoltageDomain( - voltage = options.cpu_voltage))) - else: - fatal("Atomic CPU not supported/tested") - cpu_list.append(cpu) +if options.fast_forward and options.fast_forward_pseudo_op: + fatal("Cannot fast-forward based both on the number of instructions and" + " on pseudo-ops") +fast_forward = options.fast_forward or options.fast_forward_pseudo_op + +if fast_forward: + FutureCpuClass, future_mem_mode = CpuClass, mem_mode + + CpuClass = X86KvmCPU + mem_mode = 'atomic_noncaching' + # Leave shader.timing untouched, because its value only matters at the + # start of the simulation and because we require switching cpus + # *before* the first kernel launch. + + future_cpu_list = [] + + # Initial CPUs to be used during fast-forwarding. + for i in xrange(options.num_cpus): + cpu = CpuClass(cpu_id = i, + clk_domain = SrcClockDomain( + clock = options.CPUClock, + voltage_domain = VoltageDomain( + voltage = options.cpu_voltage))) + cpu_list.append(cpu) + + if options.fast_forward: + cpu.max_insts_any_thread = int(options.fast_forward) + +if fast_forward: + MainCpuClass = FutureCpuClass +else: + MainCpuClass = CpuClass -# create the command processors +# CPs to be used throughout the simulation. for i in xrange(options.num_cp): - cp = None - if options.cpu_type == "detailed": - cp = DerivO3CPU(cpu_id = options.num_cpus + i, - clk_domain = SrcClockDomain( - clock = options.CPUClock, - voltage_domain = VoltageDomain( - voltage = options.cpu_voltage))) - elif options.cpu_type == 'timing': - cp = TimingSimpleCPU(cpu_id=options.num_cpus + i, - clk_domain = SrcClockDomain( - clock = options.CPUClock, - voltage_domain = VoltageDomain( - voltage = options.cpu_voltage))) + cp = MainCpuClass(cpu_id = options.num_cpus + i, + clk_domain = SrcClockDomain( + clock = options.CPUClock, + voltage_domain = VoltageDomain( + voltage = options.cpu_voltage))) + cp_list.append(cp) + +# Main CPUs (to be used after fast-forwarding if fast-forwarding is specified). +for i in xrange(options.num_cpus): + cpu = MainCpuClass(cpu_id = i, + clk_domain = SrcClockDomain( + clock = options.CPUClock, + voltage_domain = VoltageDomain( + voltage = options.cpu_voltage))) + if fast_forward: + cpu.switched_out = True + future_cpu_list.append(cpu) else: - fatal("Atomic CPU not supported/tested") - cp_list = cp_list + [cp] + cpu_list.append(cpu) ########################## Creating the GPU dispatcher ######################## # Dispatcher dispatches work from host CPU to GPU @@ -371,7 +395,16 @@ for cpu in cpu_list: for cp in cp_list: cp.workload = host_cpu.workload +if fast_forward: + for i in xrange(len(future_cpu_list)): + future_cpu_list[i].workload = cpu_list[i].workload + ########################## Create the overall system ######################## +# List of CPUs that must be switched when moving between KVM and simulation +if fast_forward: + switch_cpu_list = \ + [(cpu_list[i], future_cpu_list[i]) for i in xrange(options.num_cpus)] + # Full list of processing cores in the system. Note that # dispatcher is also added to cpu_list although it is # not a processing element @@ -383,10 +416,22 @@ system = System(cpu = cpu_list, mem_ranges = [AddrRange(options.mem_size)], cache_line_size = options.cacheline_size, mem_mode = mem_mode) +if fast_forward: + system.future_cpu = future_cpu_list system.voltage_domain = VoltageDomain(voltage = options.sys_voltage) system.clk_domain = SrcClockDomain(clock = options.sys_clock, voltage_domain = system.voltage_domain) +if fast_forward: + have_kvm_support = 'BaseKvmCPU' in globals() + if have_kvm_support and buildEnv['TARGET_ISA'] == "x86": + system.vm = KvmVM() + for i in xrange(len(host_cpu.workload)): + host_cpu.workload[i].useArchPT = True + host_cpu.workload[i].kvmInSE = True + else: + fatal("KvmCPU can only be used in SE mode with x86") + # configure the TLB hierarchy GPUTLBConfig.config_tlb_hierarchy(options, system, shader_idx) @@ -413,6 +458,9 @@ for i in range(options.num_cpus): system.cpu[i].interrupts[0].pio = system.piobus.master system.cpu[i].interrupts[0].int_master = system.piobus.slave system.cpu[i].interrupts[0].int_slave = system.piobus.master + if fast_forward: + system.cpu[i].itb.walker.port = ruby_port.slave + system.cpu[i].dtb.walker.port = ruby_port.slave # attach CU ports to Ruby # Because of the peculiarities of the CP core, you may have 1 CPU but 2 @@ -466,8 +514,12 @@ dispatcher.dma = system.piobus.slave # Note this implicit setting of the cpu_pointer, shader_pointer and tlb array # parameters must be after the explicit setting of the System cpu list -shader.cpu_pointer = host_cpu -dispatcher.cpu = host_cpu +if fast_forward: + shader.cpu_pointer = future_cpu_list[0] + dispatcher.cpu = future_cpu_list[0] +else: + shader.cpu_pointer = host_cpu + dispatcher.cpu = host_cpu dispatcher.shader_pointer = shader dispatcher.cl_driver = driver @@ -494,7 +546,32 @@ m5.instantiate(checkpoint_dir) # Map workload to this address space host_cpu.workload[0].map(0x10000000, 0x200000000, 4096) +if options.fast_forward: + print "Switch at instruction count: %d" % \ + cpu_list[0].max_insts_any_thread + exit_event = m5.simulate(maxtick) + +if options.fast_forward: + if exit_event.getCause() == "a thread reached the max instruction count": + m5.switchCpus(system, switch_cpu_list) + print "Switched CPUS @ tick %s" % (m5.curTick()) + m5.stats.reset() + exit_event = m5.simulate(maxtick - m5.curTick()) +elif options.fast_forward_pseudo_op: + while exit_event.getCause() == "switchcpu": + # If we are switching *to* kvm, then the current stats are meaningful + # Note that we don't do any warmup by default + if type(switch_cpu_list[0][0]) == FutureCpuClass: + print "Dumping stats..." + m5.stats.dump() + m5.switchCpus(system, switch_cpu_list) + print "Switched CPUS @ tick %s" % (m5.curTick()) + m5.stats.reset() + # This lets us switch back and forth without keeping a counter + switch_cpu_list = [(x[1], x[0]) for x in switch_cpu_list] + exit_event = m5.simulate(maxtick - m5.curTick()) + print "Ticks:", m5.curTick() print 'Exiting because ', exit_event.getCause() sys.exit(exit_event.getCode()) |