Hi,
I am getting floating point exception when doing emulation tests with ns2
version 2.33 on a Fedora 8 x86 machine. After debugging, I traced the problem
to the "width_" field of CalendarScheduler class, which is extended by
RealTimeScheduler that I use during emulation (nse). width_ field takes very
large values like 7.8181674907623326e+307 on one test and
3.2030480282798705e+307 on another test, which causes overflow and therefore
SIGFPE. Below are the debug outputs from two separate tests:
test1:
TapAgent(_o70): linked sock 7 as READABLE
TapAgent(_o76): linked sock 10 as READABLE
17:57:31 Started ns2 for test_0042
Program received signal SIGFPE, Arithmetic exception.
0x0818a993 in CalendarScheduler::reinit (this=0xa0ed020, nbuck=8,
bwidth=7.8181674907623326e+307, start=82.553562974804962)
at common/scheduler.cc:859
859 diff1_ = diff0_ + bwidth;
test2:
TapAgent(_o70): linked sock 7 as READABLE
TapAgent(_o76): linked sock 10 as READABLE
18:40:22 Started ns2 for test_0042
Program received signal SIGFPE, Arithmetic exception.
0x0818a21d in CalendarScheduler::insert2 (this=0x9e67020, e=0x9e902f8)
at common/scheduler.cc:668
668 int i = CALENDAR_HASH(e->time_);
(gdb) print e->time_
$1 = 100
(gdb) print width_
$2 = 3.2030480282798705e+307
Any comments?
Thanks
--
Burak
