Charm++ parallel programming system

[Xuehan Xu <xxhdx1985126 AT gmail.com>]

Dear sirs:
       I tried to run the example code Cjacobi3D on bigsim, and came up with the following error:

[root@localhost Cjacobi3D]# ./charmrun jacobi +x2 +y2 +z2 ++remote-shell ssh
Charmrun> started all node programs in 10.196 seconds.
Warning> Randomization of stack pointer is turned on in kernel, thread migration may not work! Run 'echo 0 > /proc/sys/kernel/randomize_va_space' as root to disable it, or try run with '+isomalloc_sync'.  
Charm++: scheduler running in netpoll mode.
woailaopo
woailaopo
BG info> Simulating 2x2x2 nodes with 1 comm + 1 work threads each.
BG info> Network type: bluegene.
alpha: 1.000000e-07     packetsize: 1024        CYCLE_TIME_FACTOR:1.000000e-03.
CYCLES_PER_HOP: 5       CYCLES_PER_CORNER: 75.
BG info> cpufactor is 1.000000.
BG info> floating point factor is 0.000000.
BG info> Using WallTimer for timing method. 
LB> Load balancer ignores processor background load.
------------- Processor 0 Exiting: Caught Signal ------------
Signal: segmentation violation
Suggestion: Try running with '++debug', or linking with '-memory paranoid' (memory paranoid requires '+netpoll' at runtime).
[0] Stack Traceback:
  [0:0] [0x968420]
  [0:1] _ZN10CkArrayMap6homePeEiRK12CkArrayIndex+0x26  [0x81bb6c6]
  [0:2] _ZNK8CkLocMgr6homePeERK12CkArrayIndex+0x39  [0x81bb7ff]
  [0:3] _ZN8CkLocMgr10informHomeERK12CkArrayIndexi+0x19  [0x81b5ac3]
  [0:4] _ZN8CkLocMgr11createLocalERK12CkArrayIndexbbb+0xc7  [0x81ba039]
  [0:5] _ZN8CkLocMgr10addElementE9CkArrayIDRK12CkArrayIndexP12CkMigratableiPv+0x99  [0x81ba4b1]
  [0:6] _ZN7CkArray13insertElementEP9CkMessage+0x139  [0x81c52d9]
  [0:7] _ZN7CkArray13insertInitialERK12CkArrayIndexPvi+0x5f  [0x81c55d5]
  [0:8] _ZN8BlockMap15populateInitialEiR15CkArrayIndexMaxPvP8CkArrMgr+0x1c1  [0x81beecb]
  [0:9] _ZN8CkLocMgr15populateInitialER15CkArrayIndexMaxPvP8CkArrMgr+0x47  [0x81c8b73]
  [0:10] _ZN7CkArrayC1ER14CkArrayOptionsR19CkMarshalledMessage10_ckGroupID+0x31e  [0x81c5f34]
  [0:11] _ZN15CkIndex_CkArray23_call_CkArray_marshall1EPvP7CkArray+0xc0  [0x81c6a88]
  [0:12] CkDeliverMessageFree+0x44  [0x8199f06]
  [0:13] /root/laoposim/charm/net-linux-bigemulator-smp/examples/ampi/Cjacobi3D/jacobi [0x8199fa6]
  [0:14] CkCreateLocalGroup+0x319  [0x819bba9]
  [0:15] _Z12_createGroup10_ckGroupIDP8envelope+0x22c  [0x819c268]
  [0:16] /root/laoposim/charm/net-linux-bigemulator-smp/examples/ampi/Cjacobi3D/jacobi [0x819c32e]
  [0:17] CkCreateGroup+0x153  [0x819c48b]
  [0:18] _ZN14CProxy_CkArray5ckNewERK14CkArrayOptionsRK19CkMarshalledMessageRK10_ckGroupIDPK14CkEntryOptions+0x119  [0x81c6f1d]
  [0:19] _ZN16CProxy_ArrayBase13ckCreateArrayEP14CkArrayMessageiRK14CkArrayOptions+0xff  [0x81c7053]
  [0:20] _ZN19CProxy_ArrayElement13ckCreateArrayEP14CkArrayMessageiRK14CkArrayOptions+0x2a  [0x814212e]
  [0:21] _ZN13CProxy_TCharm13ckCreateArrayEP14CkArrayMessageiRK14CkArrayOptions+0x2a  [0x816a94a]
  [0:22] _ZN13CProxy_TCharm5ckNewEP13TCharmInitMsgRK14CkArrayOptions+0x2e  [0x81661c6]
  [0:23] /root/laoposim/charm/net-linux-bigemulator-smp/examples/ampi/Cjacobi3D/jacobi [0x8166e28]
  [0:24] TCHARM_Create_data+0x82  [0x8169bdc]
  [0:25] _Z14ampiCreateMainPFviPPcEPKci+0x77  [0x8136dc7]
  [0:26] AMPI_Setup_Switch+0x40  [0x8136f9a]
  [0:27] TCHARM_Call_fallback_setup+0x16  [0x81659bc]
  [0:28] TCHARM_User_setup+0xb  [0x828e987]
  [0:29] tcharm_user_setup_+0xb  [0x828e96f]
  [0:30] _ZN10TCharmMainC1EP8CkArgMsg+0x31  [0x8117e2d]
  [0:31] _ZN18CkIndex_TCharmMain25_call_TCharmMain_CkArgMsgEPvP10TCharmMain+0x2f  [0x8117adf]
  [0:32] _Z10_initCharmiPPc+0xda1  [0x818e24d]
  [0:33] _ZN14workThreadInfo3runEv+0x347  [0x8174371]
  [0:34] _Z10run_threadP10threadInfo+0x2e  [0x816b812]
  [0:35] /root/laoposim/charm/net-linux-bigemulator-smp/examples/ampi/Cjacobi3D/jacobi [0x8187f04]
  [0:36] /root/laoposim/charm/net-linux-bigemulator-smp/examples/ampi/Cjacobi3D/jacobi [0x828e7ad]
  [37] Charm++ Runtime: Converse thread (qt_args+0x70  [0x828e83e])
Fatal error on PE 0> segmentation violationde

I built the system like this:
./build bgampi net-linux bigemulator smp -g -O0

I debugged the program, and it seems that the problem exists at the line 222 in cklocation.C. The pointer Cpv_startedEvac_ is NULL when being derefernced. 
How should I deal with it ? And what is the pointer used for?

Thanks everyone.