You can have an Atomic CPU fake stalls by setting the simulate_stalls
parameter on the CPU instance. However, if you're doing anything but
fast forwarding instructions you should use a timing or o3 cpu instead.
Ali
On Apr 3, 2008, at 2:06 AM, Korey Sewell wrote:
if you are running an AtomicSimpleCPU then yes, it is a 1 CPI machine
so what you are seeing is correct,
especially if you aren't assigning any caches to the CPUs to create
any kind of cache miss latency.
On Thu, Apr 3, 2008 at 1:41 AM, bipin kadel
<[EMAIL PROTECTED]> wrote:
Hi,
I am trying to run spec cpu benchmarks on 4 core CMP system in se
mode. I am using ALPHA_SE. I have assigned 100 million
for max_instrs_all_threads for each cpu. When I see the m5stats.txt
file, it shows 100 million for number of cpu cycles simulated and
also, 100 million for number of instructions executed on each cpu.
That
means, it is showing Intructions per cycle equals to 1. I think the
value
obtained is wrong. So could you please help me regarding this matter.
The configuration file is :
process1 = EioProcess()
process1.file = "/speccpu2000/perlbmk/perlbmk.eio.gz"
process2 =3D EioProcess()
process2.file = "/speccpu2000/gap/gap.eio.gz"
process3 =3D EioProcess()
process3.file = "speccpu2000/vortex/vortex.eio.gz"
process4 =3D EioProcess()
process4.file = "/speccpu2000/twolf/twolf.eio.gz"
system = System(cpu = [CPUClass(cpu_id=i) for i in xrange(np)],
physmem = PhysicalMemory(range= AddrRange("512MB")),
membus = Bus(), mem_mode = test_mem_mode)
for i in xrange(np):
system.cpu[i].max_insts_all_threads= 100000000
system.cpu[0].workload =3D process1
system.cpu[1].workload =3D process2
system.cpu[2].workload =3D process3
system.cpu[3].workload =3D process4
The result obtained in m5stats.txt looks like:
system.cpu0.not_idle_fraction 1 # Percentage of non-idle cycles
system.cpu0.numCycles 100000000 # number of cpu cycles simulated
system.cpu0.num_insts 100000000 # Number of instructions executed
system.cpu0.num_refs 34901881 # Number of memory references
.........
system.cpu1.not_idle_fraction 1 # Percentage of non-idle cycles
system.cpu1.numCycles 100000000 # number of cpu cycles simulated
system.cpu1.num_insts 100000000 # Number of instructions executed
system.cpu1.num_refs 32273950 # Number of memory references
...........
system.cpu2.not_idle_fraction 1 # Percentage of non-idle cycles
system.cpu2.numCycles 100000000 # number of cpu cycles simulated
system.cpu2.num_insts 100000000 # Number of instructions executed
system.cpu2.num_refs 38511760 # Number of memory references
.......
system.cpu3.not_idle_fraction 1 # Percentage of non-idle cycles
system.cpu3.numCycles 100000000 # number of cpu cycles simulated
system.cpu3.num_insts 100000000 # Number of instructions executed
system.cpu3.num_refs 28610533 # Number of memory references
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--
----------
Korey L Sewell
Graduate Student - PhD Candidate
Computer Science & Engineering
University of Michigan
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