It would be hard for me to say for sure, but it could be that you're running out of memory and an allocation of something (a packet maybe) is failing. When you reduce the size of the simulated memory then you'd also increase the amount of memory for everything else. Are you using a 32 bit host? If so, 32 bit x86 has a 32 bit virtual address space, and I believe only 3/4 or 1/2 of that is available to user processes. In that case moving to a 64 bit machine may solve the problem. Another more ambitious solution would be to set up a sparse physical memory object.
Gabe Quoting Rick Strong <[email protected]>: > Hi all, > > When I try to run a an atomic multicore simulation (2 cores) with 2GB or > more of Physical Memory, there is a segment fault near the beginning of > linux boot. I have M5 output, gdb trace, and the system.terminal output > below. The simulation works fine for < 1GB. Any idea of what the problem > might be? > > Thanks, > -Richard > > > *Output:* > > Program received signal SIGSEGV, Segmentation fault. > [Switching to Thread 140492629079776 (LWP 27435)] > Bus::recvAtomic (this=Variable "this" is not available. > ) at /home/rstrong/build/m5powerfs/build/ALPHA_FS/mem/port.hh:207 > 207 { return peer->recvAtomic(pkt); } > > *Trace:* > #0 Bus::recvAtomic (this=Variable "this" is not available. > ) at /home/rstrong/build/m5powerfs/build/ALPHA_FS/mem/port.hh:207 > #1 0x0000000000424bf3 in AtomicSimpleCPU::read<unsigned long> > (this=0x1b1c700, > addr=18446739710018224128, da...@0x7fffa2f087c8, flags=0) > at /home/rstrong/build/m5powerfs/build/ALPHA_FS/mem/port.hh:207 > #2 0x0000000000429cc8 in AlphaISAInst::Ldq_u::execute (this=0x1c5edf0, > xc=0x1b1c700, > traceData=0x0) > at > /home/rstrong/build/m5powerfs/build/ALPHA_FS/arch/alpha/atomic_simple_cpu_exec.cc:478 > #3 0x000000000041ebaa in AtomicSimpleCPU::tick (this=0x1b1c700) > at /home/rstrong/build/m5powerfs/build/ALPHA_FS/cpu/simple/atomic.cc:678 > #4 0x000000000066ce7b in EventQueue::serviceOne (this=Variable "this" > is not available. > ) > at /home/rstrong/build/m5powerfs/build/ALPHA_FS/sim/eventq.cc:202 > #5 0x00000000009fb222 in simulate (num_cycles=1000000000000000) > at /home/rstrong/build/m5powerfs/build/ALPHA_FS/sim/simulate.cc:73 > #6 0x0000000000a630e4 in _wrap_simulate (self=Variable "self" is not > available. > ) > at > /home/rstrong/build/m5powerfs/build/ALPHA_FS/python/swig/event_wrap.cc:4135 > #7 0x00007fc6fd43fe13 in PyObject_Call (func=0x1b22238, arg=0x0, kw=0x0) > at Objects/abstract.c:1860 > #8 0x00007fc6fd4bcaed in PyEval_EvalFrameEx (f=0x1b60310, > throwflag=Variable "throwflag" is not available. > ) at Python/ceval.c:3844 > #9 0x00007fc6fd4c0048 in PyEval_EvalCodeEx (co=0x7fc6fa454648, > globals=Variable "globals" is not available. > ) at Python/ceval.c:2831 > #10 0x00007fc6fd4be7da in PyEval_EvalFrameEx (f=0x1b5f6a0, > throwflag=Variable "throwflag" is not available. > ) at Python/ceval.c:3660 > #11 0x00007fc6fd4bef85 in PyEval_EvalFrameEx (f=0x12cd990, > throwflag=Variable "throwflag" is not available. > ) at Python/ceval.c:3650 > #12 0x00007fc6fd4c0048 in PyEval_EvalCodeEx (co=0x7fc6f975d300, > globals=Variable "globals" is not available. > ) at Python/ceval.c:2831 > #13 0x00007fc6fd4be7da in PyEval_EvalFrameEx (f=0x12f96b0, > throwflag=Variable "throwflag" is not available. > ) at Python/ceval.c:3660 > #14 0x00007fc6fd4bef85 in PyEval_EvalFrameEx (f=0x13457e0, > throwflag=Variable "throwflag" is not available. > ) at Python/ceval.c:3650 > #15 0x00007fc6fd4bef85 in PyEval_EvalFrameEx (f=0x122c870, > throwflag=Variable "throwflag" is not available. > ) at Python/ceval.c:3650 > #16 0x00007fc6fd4c0048 in PyEval_EvalCodeEx (co=0x7fc6f974adc8, > globals=Variable "globals" is not available. > ) at Python/ceval.c:2831 > #17 0x00007fc6fd4c0162 in PyEval_EvalCode (co=0x1b22238, globals=0x0, > locals=0x0) > at Python/ceval.c:494 > #18 0x00007fc6fd4bec16 in PyEval_EvalFrameEx (f=0x12280c0, > throwflag=Variable "throwflag" is not available. > ) at Python/ceval.c:4168 > #19 0x00007fc6fd4c0048 in PyEval_EvalCodeEx (co=0x7fc6fa4aa4e0, > globals=Variable "globals" is not available. > ) at Python/ceval.c:2831 > #20 0x00007fc6fd4be7da in PyEval_EvalFrameEx (f=0xf52080, > throwflag=Variable "throwflag" is not available. > ) at Python/ceval.c:3660 > #21 0x00007fc6fd4c0048 in PyEval_EvalCodeEx (co=0x7fc6fa347198, > globals=Variable "globals" is not available. > ) at Python/ceval.c:2831 > #22 0x00007fc6fd4c0162 in PyEval_EvalCode (co=0x1b22238, globals=0x0, > locals=0x0) > at Python/ceval.c:494 > #23 0x00007fc6fd4e0c7c in PyRun_StringFlags (str=0xb5db5c "m5.main()", > start=Variable "start" is not available. > ) > at Python/pythonrun.c:1271 > #24 0x000000000077ec61 in m5Main (argc=Variable "argc" is not available. > ) > at /home/rstrong/build/m5powerfs/build/ALPHA_FS/sim/init.cc:194 > #25 0x0000000000409822 in main (argc=3, argv=0x7fffa2f0a938) > at /home/rstrong/build/m5powerfs/build/ALPHA_FS/sim/main.cc:57 > > * > System.terminal:* > Memory cluster 1 [392 - -262536] > Initalizing mdt_bitmap addr 0xFFFFFC0000038000 mem_pages FFFFFFFFFFFC0000 > ConsoleDispatch at virt 100008D8 phys 188D8 val FFFFFC00000100A8 > Bootstraping CPU 1 with sp=0xFFFFFC0000076000 > unix_boot_mem ends at FFFFFC0000078000 > k_argc = 0 > jumping to kernel at 0xFFFFFC0000310000, (PCBB 0xFFFFFC0000018180 pfn 1004) > CallbackFixup 0 18000, t7=FFFFFC00006CC000 > Entering slaveloop for cpu 1 my_rpb=FFFFFC0000018400 > [4194001.852669] Linux version 2.6.18.8 (bink...@blue) (gcc version > 4.0.2) #9 SMP Wed Feb 27 11:50:35 PST 2008 > [4194001.852669] Booting GENERIC on Tsunami variation DP264 using > machine vector DP264 from SRM > [4194001.852669] Major Options: SMP LEGACY_START VERBOSE_MCHECK > [4194001.852669] Command line: root=/dev/hda1 console=ttyS0,9600 > init=/m5/bin/init.sh > [4194001.852669] memcluster 0, usage 1, start 0, end 392 > [4194001.852669] memcluster 1, usage 0, start 392, end > 18446744073709289472 > [4194001.852669] setup: forcing memory size to 33554432K (from -2097152K). > [4194001.852669] freeing pages 1006:4194304 > [4194001.852669] reserving pages 1006:1070 > [4194001.852669] SMP: 2 CPUs probed -- cpu_present_map = 3 > [4194001.852669] Built 1 zonelists. Total pages: 4194304 > [4194001.852669] Kernel command line: root=/dev/hda1 console=ttyS0,9600 > init=/m5/bin/init.sh > [4194001.852669] PID hash table entries: 4096 (order: 12, 32768 bytes) > [4194001.852669] Using epoch = 1900 > [4194001.854623] Console: colour dummy device 80x25 > [4194001.941537] Dentry cache hash table entries: 4194304 (order: 12, > 33554432 bytes) > [4194002.155404] Inode-cache hash table entries: 2097152 (order: 11, > 16777216 bytes) > [4194005.492316] Memory: 33265904k/33554432k available (2914k kernel > code, 284688k reserved, 733k data, 208k init) > [4194005.494269] Mount-cache hash table entries: 512 > [4194005.495246] SMP starting up secondaries. > Slave CPU 1 console command START > SlaveCmd: restart FFFFFC0000310020 FFFFFC0000310020 vptb > FFFFFFFE00000000 my_rpb FFFFFC0000018400 my_rpb_phys 18400 > [4194005.497199] Brought up 2 CPUs > [4194005.497199] SMP: Total of 2 processors activated (8000.15 BogoMIPS). > [4194005.509894] migration_cost=976 > > > > > _______________________________________________ > m5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/m5-users > _______________________________________________ m5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
