Hi, Kevin
Very thank your reply!
My command line is : ./build/ALPHA_FS/m5.opt configs/example/mytest-fs.py -d
And the mytest-fs.py is a copy from fs.py with a litter modification.
It is like that as bellow:
import optparse, os, sys
import m5
from m5.objects import *
m5.AddToPath('../common')
from FSConfig import *
from SysPaths import *
from Benchmarks import *
parser = optparse.OptionParser()
parser.add_option("-d", "--detailed", action="store_true")
parser.add_option("-t", "--timing", action="store_true")
parser.add_option("-m", "--maxtick", type="int")
parser.add_option("--maxtime", type="float")
parser.add_option("--dual", action="store_true",
help="Simulate two systems attached with an ethernet link")
parser.add_option("-b", "--benchmark", action="store", type="string",
dest="benchmark",
help="Specify the benchmark to run. Available benchmarks: %s"\
% DefinedBenchmarks)
parser.add_option("--etherdump", action="store", type="string",
dest="etherdump",
help="Specify the filename to dump a pcap capture of the
ethernet"
"traffic")
parser.add_option("-p", "--cpunum", type="int")
parser.add_option("-l", "--L1", action="store_true")
parser.add_option("-L", "--L2", action="store_true")
(options, args) = parser.parse_args()
if args:
print "Error: script doesn't take any positional arguments"
sys.exit(1)
n_cpus = 1
if options.cpunum:
n_cpus = options.cpunum
if options.detailed:
cpu_server = [ DetailedO3CPU(defer_registration=True) for i in
xrange(n_cpus) ]
cpu_client = [ DetailedO3CPU() for i in xrange(n_cpus) ]
mem_mode = 'timing'
elif options.timing:
cpu_server = [ TimingSimpleCPU(defer_registration=True) for i in
xrange(n_cpus) ]
cpu_client = [ TimingSimpleCPU() for i in xrange(n_cpus) ]
mem_mode = 'timing'
else:
cpu_server = [ AtomicSimpleCPU(defer_registration=True) for i in
xrange(n_cpus) ]
cpu_client = [ AtomicSimpleCPU() for i in xrange(n_cpus) ]
mem_mode = 'atomic'
BaseCPU.clock = '2GHz'
if options.benchmark:
if options.benchmark not in Benchmarks:
print "Error benchmark %s has not been defined." % options.benchmark
print "Valid benchmarks are: %s" % DefinedBenchmarks
sys.exit(1)
bm = Benchmarks[options.benchmark]
else:
if options.dual:
bm = [Machine(), Machine()]
else:
bm = [Machine()]
class L1(BaseCache):
latency = 1
block_size = 64
mshrs = 8
tgts_per_mshr = 8
class L2(BaseCache):
block_size = 64
latency = 100
mshrs = 92
tgts_per_mshr = 16
write_buffers = 8
if len(bm) == 1:
# modify the makeLinuxAlphaSystem func take a cpus vector as a
parameter[FSConfig.py]
root = Root(clock = '1THz',
system = makeLinuxAlphaSystem(cpu_server, mem_mode, bm[0]))
for cpu in cpu_server:
if options.L1:
cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
L1(size = '32kB', assoc = 4))
cpu.mem = cpu.dcache
cpu.connectMemPorts(root.system.membus)
elif options.L2:
cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
L1(size = '32kB', assoc = 4))
cpu.mem = cpu.dcache
# l2cache & bus
root.system.toL2Bus = Bus()
root.system.l2c = L2(size='4MB', assoc=8)
root.system.l2c.cpu_side = root.system.toL2Bus.port
# connect l2c to membus
root.system.l2c.mem_side = root.system.membus.port
# connect cpu level-1 caches to shared level-2 cache
cpu.connectMemPorts(root.system.toL2Bus)
else:
cpu.mem = root.system.physmem
cpu.connectMemPorts(root.system.membus)
else:
print "Error I don't know how to create more than 2 systems."
sys.exit(1)
m5.instantiate(root)
if options.maxtick:
maxtick = options.maxtick
elif options.maxtime:
simtime = int(options.maxtime * root.clock.value)
print "simulating for: ", simtime
maxtick = simtime
else:
maxtick = -1
exit_event=m5.simulate(maxtick)
while exit_event.getCause() == "checkpoint":
m5.checkpoint(root, "cpt.%d")
exit_event = m5.simulate(maxtick - m5.curTick())
print 'Exiting @ cycle', m5.curTick(), 'because', exit_event.getCause()
I have compiled the m5.opt and m5.debug with command: scons
build/ALPHA_FS/m5.opt(m5.debug) CPU_MODELS=AtomicSimpleCPU,TimingSimpleCPU,O3CPU
I don't know whether the above information is enough, if any questions, please
tell me.
Best Regards to You!
------------------
xiaojun
[EMAIL PROTECTED]
2006-11-29
-------------------------------------------------------------
Sender£ºKevin Te-Ming Lim
Sending Date£º2006-11-29 04:30:35
Receiver£º
Copy To£º
subject£ºRe: [m5-users] Problem about DetailO3CPU on FS mode
Hi Xiaojun, sorry for the slow reply. You're correct that the segfault
is because activeThreads isn't being checked to be empty, and is getting
a garbage value back when accessing the front of the list. The
underlying problem is that the activeThreads object should not be made
empty on the same cycle that the CPU is still running, which
unfortunately happens in a few cases in our 2.0 beta 1 release. What
command line are you running to get this error? I've fixed problems
related to activeThreads being deallocated improperly in the code that
will be released shortly, but I want to make sure your exact case has
been fixed.
Kevin
xiaojun.chen wrote:
> Hi,m5-users,
> When I use DetailedO3CPU on FS mode, there is always a segmentation fault.
> And gdb infomation as bellow:
>
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread -1208240448 (LWP 900)]
> 0x082b85bb in DefaultFetch<AlphaSimpleImpl>::getFetchingThread
> (this=0x9da9564,
> [EMAIL PROTECTED]) at build/ALPHA_FS/cpu/o3/fetch_impl.hh:1334
> 1334 if (fetchStatus[tid] == Running ||
> (gdb) p tid
> $1 = 165293664
> (gdb) p (*activeThreads).size()
> $6 = 0
> (gdb) bt
> #0 0x082b85bb in DefaultFetch<AlphaSimpleImpl>::getFetchingThread
> (this=0x9da9564,
> [EMAIL PROTECTED]) at build/ALPHA_FS/cpu/o3/fetch_impl.hh:1334
> #1 0x082b8614 in DefaultFetch<AlphaSimpleImpl>::fetch (this=0x9da9564,
> [EMAIL PROTECTED])
> at build/ALPHA_FS/cpu/o3/fetch_impl.hh:1007
> #2 0x082ba28d in DefaultFetch<AlphaSimpleImpl>::tick (this=0x9da9564)
> at build/ALPHA_FS/cpu/o3/fetch_impl.hh:834
> #3 0x082c95c2 in FullO3CPU<AlphaSimpleImpl>::tick (this=0x9da9160)
> at build/ALPHA_FS/cpu/o3/cpu.cc:414
>
> build/ALPHA_FS/cpu/o3/fetch_impl.hh:
> int tid = *((*activeThreads).begin());
> if (fetchStatus[tid] == Running ||
> fetchStatus[tid] == IcacheAccessComplete ||
> fetchStatus[tid] == Idle) {
> return tid;
> } else {
> return -1;
> }
>
> It seems that there didn't check whether the activeThreads is empty or not.
> Is that the exact reason for this error?
> Thanks and BestRegards!
>
>
> xiaojun.chen
> [EMAIL PROTECTED]
> 2006-11-22
> ------------------------------------------------------------------------
>
> _______________________________________________
> m5-users mailing list
> [email protected]
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