[ns] Maximum number of TCP Sender?

["Young S. Choi" <guru0109@palgong.knu.ac.kr>]

Hi.

I use FreeBSD for ns simulator

tenet2@~/work/afd/tcp> uname -a
FreeBSD tenet2.knu.ac.kr 4.1-STABLE FreeBSD 4.1-STABLE #5: Fri Aug 11
14:08:16 KST 2000     root@tenet2.knu.ac.kr:/usr/src/sys/compile/TENET2
i386
system memeory 256M
Swap : 256M

I use ns-2.1b7a

Unfortunately, A few month ago, I asked same question but haven't receive
any answer yet...

Here is my network configuration


S1----|                                      |-----R1
          |                                      |
S2----|------G0-------G1------|-----R2
.         |                                      |        .
.         |                                      |        .
.         |                                      |        .
S1024---|                                      |-----R1024

S# : TCP Sender R# : TCP Receiver
G0,1 : Gateway

I test some packet scheduling algorithm.

When the number of sender is small, ns works

but number of sender reaches about 1024, ns core dumps.

To reduce memory comsumption, I don't use any queue trace monitor, etc.

But problem stil exiest

here are my error code.============

tenet2@~/work/afd/TCP/afd/1024session> date;ns app.tcl > result;date
Mon May  7 02:19:26 KST 2001
unable to alloc 32 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 24 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
unable to alloc 2400 bytes
Segmentation fault(core dumped)
Mon May  7 02:38:38 KST 2001
======================================================================
tenet2>dmesg

da0: 8761MB (17942584 512 byte sectors: 255H 63S/T 1116C)
link_elf: symbol splash_register undefined
pid 376 (ns), uid 1015: exited on signal 11 (core dumped)
======================================================================

What is my problem? How should I do now?

Thanks a lot in advance,
And with best regards...

--
Young S.Choi
mailto:guru0109@palgong.knu.ac.kr
http://tenet2.knu.ac.kr/~guru0109
/"\ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
\ /   ASCII Ribbon Campaign  . Windows: "Where do you want to go today?"
 X  - NO HTML/RTF in e-mail  . Linux: "Where do you want to go tomorrow?"
/ \ - NO Word docs in e-mail . BSD: "Are you guys coming or what?"