[ns] Scheduler backwards problem

[Lee <yli@gpu.srv.ualberta.ca>]

Hi,

I got the following problem after implementing some timer
ns: scheduler going backwards in time from 10.852830 to 0.000000.

Keep track of the stack using "where", I got the following.
You could see all of them are of the original ns.
And I do not think I try to touch scheduler explicitly.
Would you like to tell me generally what causes 
the scheduler problem? Thanks.

Lee 

#0  0x1 in ?? ()
#1  0x804dbcd in Scheduler::dispatch (this=0x82cfc98, p=0xbfffd54c) at
scheduler.cc:108
#2  0x804db0d in Scheduler::run (this=0x82cfc98) at scheduler.cc:84
#3  0x804dca8 in Scheduler::command (this=0x82cfc98, argc=2,
argv=0xbfffd8ec) at scheduler.cc:138
#4  0x80c179d in TclClass::dispatch_cmd () at gen/ptypes.cc:106
#5  0x80c3a1c in OTclDispatch (cd=0x82b2f00, in=0x8256c80, argc=3,
argv=0xbfffd928) at otcl.c:421
#6  0x80c7ae4 in TclInvokeStringCommand () at gen/ptypes.cc:106
#7  0x80df594 in TclExecuteByteCode () at gen/ptypes.cc:106
#8  0x80c82ec in Tcl_EvalObj () at gen/ptypes.cc:106
#9  0x80df797 in TclExecuteByteCode () at gen/ptypes.cc:106
#10 0x80c82ec in Tcl_EvalObj () at gen/ptypes.cc:106
#11 0x80fad9c in TclObjInterpProc () at gen/ptypes.cc:106
#12 0x80fa9d0 in TclProcInterpProc () at gen/ptypes.cc:106
#13 0x80c3bab in OTclDispatch (cd=0x82b2f00, in=0x8256c80, argc=2,
argv=0xbfffe628) at otcl.c:464
#14 0x80c7ae4 in TclInvokeStringCommand () at gen/ptypes.cc:106
#15 0x80df594 in TclExecuteByteCode () at gen/ptypes.cc:106
#16 0x80c82ec in Tcl_EvalObj () at gen/ptypes.cc:106
#17 0x80fad9c in TclObjInterpProc () at gen/ptypes.cc:106
#18 0x80fa9d0 in TclProcInterpProc () at gen/ptypes.cc:106
#19 0x80c3a1c in OTclDispatch (cd=0x82bf278, in=0x8256c80, argc=2,
argv=0xbfffef4c) at otcl.c:421
#20 0x80c7ae4 in TclInvokeStringCommand () at gen/ptypes.cc:106
#21 0x80df594 in TclExecuteByteCode () at gen/ptypes.cc:106
#22 0x80c82ec in Tcl_EvalObj () at gen/ptypes.cc:106
#23 0x80f08fc in Tcl_EvalFile () at gen/ptypes.cc:106
#24 0x80f2673 in Tcl_Main () at gen/ptypes.cc:106
#25 0x804b4c5 in main (argc=2, argv=0xbffffa24) at tclAppInit.cc:60
(gdb)