On Saturday 06 March 2010 11:53:55 pm Ali wrote:
> If you provide us with a back trace of the call we could tell you for
> sure, but I imagine it's either a response coming back from the cache,
> or it could be one of the status change messages (I think the only one
> we support is the range change) that happens at boot and when PCI
> devices get their address ranges assigned by the kernel. If it's the
> latter it should be harmless.
I've pasted the trace of the thread trying to call CpuPort. Classes like
Thread and Resource are mine and they block the completion of the calls. I've
noticed that most of CpuPort recv*() functions are empty so I hope they are in
fact all harmless.
If you need any more information, let me know, will reply tomorrow. Going to
bed now.
Thread 1:
(gdb) backtrace
#0 0x00007ffff656c4e5 in raise () from /lib64/libc.so.6
#1 0x00007ffff656d9b0 in abort () from /lib64/libc.so.6
#2 0x00000000006fb0aa in __exit_message (prefix=0xa06d08 "panic", code=-1,
func=0xa06df0 "findBreakableCycle", file=0xa06c40
"build/ALPHA_SE/pdes/deadlock_detection.cc", line=196,
fmt=0xa06ce0 "Unbreakable dealock cycle detected:\n %s", a01=..., a02=...,
a03=..., a04=..., a05=..., a06=..., a07=..., a08=..., a09=..., a10=...,
a11=..., a12=..., a13=..., a14=...,
a15=..., a16=...) at build/ALPHA_SE/base/misc.cc:90
#3 0x000000000054e2ae in Thread::findBreakableCycle (this=0x13c5d68,
awaited_resource=0x14eb568) at build/ALPHA_SE/pdes/deadlock_detection.cc:196
#4 0x000000000054dccf in ExclusiveResource::lockOnce (this=0x14eb568) at
build/ALPHA_SE/pdes/deadlock_detection.cc:92
#5 0x00000000007f1608 in Port::sendAtomic (this=0x1553bf0, pkt=0x178ed90) at
build/ALPHA_SE/mem/port.cc:184
#6 0x00000000004d58bb in Cache<LRU>::handleSnoop (this=0x1500b10,
pkt=0x178ed90, blk=0x0, is_timing=false, is_deferred=false,
pending_inval=false)
at build/ALPHA_SE/mem/cache/cache_impl.hh:1083
#7 0x00000000004de954 in Cache<LRU>::snoopAtomic (this=0x1500b10,
pkt=0x178ed90) at build/ALPHA_SE/mem/cache/cache_impl.hh:1234
#8 0x00000000004e12b8 in Cache<LRU>::MemSidePort::recvAtomic (this=0x1553d00,
pkt=0x178ed90) at build/ALPHA_SE/mem/cache/cache_impl.hh:1483
#9 0x00000000007f163a in Port::sendAtomic (this=0x1697b00, pkt=0x178ed90) at
build/ALPHA_SE/mem/port.cc:186
#10 0x00000000006ea2b2 in SyncPortProxy::recvAtomic (this=0x1697c38,
pkt=0x178ed90) at build/ALPHA_SE/pdes/mem_port_sync.cc:117
#11 0x00000000007f163a in Port::sendAtomic (this=0x1698ae0, pkt=0x178ed90) at
build/ALPHA_SE/mem/port.cc:186
#12 0x00000000004a4bca in Bus::recvAtomic (this=0x14da500, pkt=0x178ed90) at
build/ALPHA_SE/mem/bus.cc:383
#13 0x00000000004aa973 in Bus::BusPort::recvAtomic (this=0x1698da0,
pkt=0x178ed90) at build/ALPHA_SE/mem/bus.hh:94
#14 0x00000000007f163a in Port::sendAtomic (this=0x16983d8, pkt=0x178ed90) at
build/ALPHA_SE/mem/port.cc:186
#15 0x00000000006ea2b2 in SyncPortProxy::recvAtomic (this=0x16982a0,
pkt=0x178ed90) at build/ALPHA_SE/pdes/mem_port_sync.cc:117
#16 0x00000000007f163a in Port::sendAtomic (this=0x1630920, pkt=0x178ed90) at
build/ALPHA_SE/mem/port.cc:186
#17 0x00000000004d9e68 in Cache<LRU>::atomicAccess (this=0x15dd710,
pkt=0x7fff71541160) at build/ALPHA_SE/mem/cache/cache_impl.hh:626
#18 0x00000000004df833 in Cache<LRU>::CpuSidePort::recvAtomic (this=0x1630810,
pkt=0x7fff71541160) at build/ALPHA_SE/mem/cache/cache_impl.hh:1411
#19 0x00000000007f163a in Port::sendAtomic (this=0x15c8d38,
pkt=0x7fff71541160) at build/ALPHA_SE/mem/port.cc:186
#20 0x000000000041d296 in AtomicSimpleCPU::tick (this=0x15c8ac0) at
build/ALPHA_SE/cpu/simple/atomic.cc:652
#21 0x000000000041849c in AtomicSimpleCPU::TickEvent::process (this=0x15c8ce8)
at build/ALPHA_SE/cpu/simple/atomic.cc:54
#22 0x00000000005aee7c in EventQueue::serviceOne (this=0x139d430) at
build/ALPHA_SE/sim/eventq.cc:200
#23 0x000000000095cb7d in SynchronousSet::serviceOne (this=0x13c5d30) at
build/ALPHA_SE/pdes/synchronous_set.cc:502
#24 0x00000000008e16cf in simulate (.omp_data_i=0x7fffffffc760) at
build/ALPHA_SE/sim/simulate.cc:137
#25 0x00007ffff6ab4872 in ?? () from /usr/lib64/libgomp.so.1
#26 0x00007ffff7bca65d in start_thread () from /lib64/libpthread.so.0
#27 0x00007ffff660ae1d in clone () from /lib64/libc.so.6
#28 0x0000000000000000 in ?? ()
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