Hi all,
I had some trouble while running Parsec benchmarks with gem5 + Ruby (using MESI
two level protocol). I found out that some of the benchmarks will cause gem5 to
crush because a deadlock was detected. The configuration I use is the follow:
I have 8 nodes connected to a ring. Each node is a core connected with a
private 64KB L1 cache and one channel of High Bandwidth Memory (HBM). Also each
core has one out of 8 banks of the shared 8MB L2 cache connected to them. The
command I run looks like this:
./build/X86/gem5.opt
configs/example/fs.py --disk-image=x86root-parsec.img
--kernel=x86_64-vmlinux-2.6.22.9.smp -n 8 --cpu-type=detailed
--cpu-clock=1GHz --caches --l1d_size=64kB --num-l2caches=8 --l2_size=8MB
--mem-type=HBM_1000_4H_x128 --mem-channels=8 --mem-size=2GB --ruby --num-dirs=8
--topology=Torus --mesh-rows=1 --access-backing-store
--script=a_parsec_script.sh
I use the latest version of gem5 and I have no problem booting or running
commands on the simulated machine. However as i mentioned above some benchmarks
cause gem5 to crush with a message like this:
panic: Possible Deadlock detected. Aborting!version: 1 request.paddr:
0x53d6a000 m_writeRequestTable: 1 current time: 5677053833000 issue_time:
5676227351000 difference: 826482000 @ tick
5677053833000[wakeup:build/X86/mem/ruby/system/Sequencer.cc, line 119]Memory
Usage: 5799824 KBytesProgram aborted at tick 5677053833000--- BEGIN LIBC
BACKTRACE
---./build/X86/gem5.opt(_Z15print_backtracev+0x15)[0x9f8275]./build/X86/gem5.opt(_Z12abortHandleri+0x36)[0xa09536]/lib/x86_64-linux-gnu/libpthread.so.0(+0x10330)[0x7f3dd5cdf330]/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x37)[0x7f3dd4530c37]/lib/x86_64-linux-gnu/libc.so.6(abort+0x148)[0x7f3dd4534028]./build/X86/gem5.opt(_Z15__exit_epilogueiPKcS0_iS0_+0x1ec)[0x9bba6c]./build/X86/gem5.opt(_Z14__exit_messageIIjmmmmmEEvPKciS1_S1_iS1_DpRKT_+0xc7)[0x93ca27]./build/X86/gem5.opt(_ZN9Sequencer6wakeupEv+0x266)[0x93a936]./build/X86/gem5.opt(_ZN10EventQueue10serviceOneEv+0xb1)[0xa018e1]./build/X86/gem5.opt(_Z9doSimLoopP10EventQueue+0x38)[0xa22938]./build/X86/gem5.opt(_Z8simulatem+0x1fb)[0xa22ebb]./build/X86/gem5.opt[0x969d7c]/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x45f7)[0x7f3dd58f7af7]/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7f3dd58f954d]/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x48d8)[0x7f3dd58f7dd8]/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x4b59)[0x7f3dd58f8059]/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x4b59)[0x7f3dd58f8059]/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7f3dd58f954d]/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCode+0x32)[0x7f3dd58f9682]/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x563e)[0x7f3dd58f8b3e]/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7f3dd58f954d]/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x48d8)[0x7f3dd58f7dd8]/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7f3dd58f954d]/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCode+0x32)[0x7f3dd58f9682]/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyRun_StringFlags+0x79)[0x7f3dd58f34b9]./build/X86/gem5.opt(_Z6m5MainiPPc+0x5f)[0xa08caf]./build/X86/gem5.opt(main+0x33)[0x701933]/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)[0x7f3dd451bf45]./build/X86/gem5.opt[0x725e83]---
END LIBC BACKTRACE ---
Anyone can help me figure out what the problem is? Am I missing something? Does
my system configuration match the command I run? I would appreciate any help!
Thanks,George
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