Hi,
I'm getting started with Marssx86 doing some simulation of MPI codes in a
single node with large numbers of cores. When doing some initial runs, I ran
into a segfault in the simulator (marss 0.2.1)
(qemu) simconfig -run -quiet -machine shared_l2
simulation options received:-run -quiet -machine shared_l2
(qemu)
root@ubuntu:~/svn/afriedle/miniMD-0.1# mpirun -np 1 ./md
qemu-system-x86_64: ptlsim/build/core/ooo-core/ooo.cpp:1301: bool
ooo::ThreadContext::handle_exception(): Assertion `ctx.page_fault_addr != 0'
failed.
Aborted (core dumped)
I'll paste the gdb backtrace at the end of the email. This occurs with just 1
MPI rank and appears to die early in the program. I can run w/o the cycle
accurate simulation, and everything works. I compiled marss with c=4 cores and
using the provided splash.img, though I updated ubuntu to lucid and am using
their stock kernel and Open MPI. I can reproduce the segfault with marss 0.2.1
and the current git.
Any idea what is going on?
Thanks,
Andrew
Program terminated with signal 6, Aborted.
#0 0x00002aaaadc4e265 in raise (sig=<value optimized out>)
at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
64 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
(gdb) bt
#0 0x00002aaaadc4e265 in raise (sig=<value optimized out>)
at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1 0x00002aaaadc4fd10 in abort () at abort.c:88
#2 0x00002aaaadc476e6 in __assert_fail (
assertion=0x7b223a "ctx.page_fault_addr != 0",
file=0x7b2cf0 "ptlsim/build/core/ooo-core/ooo.cpp", line=1301,
function=0x7b3900 "bool ooo::ThreadContext::handle_exception()")
at assert.c:78
#3 0x00000000005c1913 in ooo::ThreadContext::handle_exception (this=0x2f38a60)
at ptlsim/build/core/ooo-core/ooo.cpp:1301
#4 0x00000000005c28ba in ooo::OooCore::runcycle (this=0x2f23bd0)
at ptlsim/build/core/ooo-core/ooo.cpp:749
#5 0x000000000065ea6b in BaseMachine::run (this=0x123bfc0, config=...)
at ptlsim/build/sim/machine.cpp:164
#6 0x000000000066b337 in ptl_simulate () at ptlsim/build/sim/ptlsim.cpp:1244
#7 0x000000000057bfc8 in sim_cpu_exec () at qemu/cpu-exec.c:310
#8 0x000000000041a96e in main_loop (argc=10, argv=<value optimized out>,
envp=<value optimized out>) at qemu/vl.c:1451
#9 main (argc=10, argv=<value optimized out>, envp=<value optimized out>)
at qemu/vl.c:3186
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