Sizeof Network stacks

This project determines the sizeof network stacks used in constrained environments. To make sure that the comparison data is fair, the network stacks are compiled using the same ARM cross-compiler and using similar CFLAGS/LDFLAGS.

This work was done to cross-verify the data in draft-ietf-lwig-tcp-constrained-node-networks-04. For understanding how the constrained tcp-stacks differ from each other, do read the draft.

There were two methods used to get the memory sizes for the desired modules:

1. Enable and then disable the relevant module (for example LWIP_TCP, or UIP_CONF_TCP) and get the difference in flash/ram.
2. Use size utility and the linker generated map files to evaluate the memory requirements of the relevant module (based on object files).

Contiki-NG

Platform used CC2538DK, cross-compiling on linux.

Sizeof(TCP_ONLY) stack without IP6/ICMP6 and packet buffers. This was calculated by compiling examples/rpl-border-router with and without TCP support and getting the difference in size.

Contiki-NG: sizeof(TCP_ONLY) text=3112, data=0, bss=596

Sizeof(TCP+IP6+ICMP6+PacketBuffers):

Contiki-NG: with TCP/IP6/ICMP6 (no 6lo)

text	data	bss	dec	hex	filename
172	0	0	172	ac	build/cc2538dk/obj/memb.o
86	0	0	86	56	build/cc2538dk/obj/net-debug.o
128	0	4	132	84	build/cc2538dk/obj/netstack.o
558	0	133	691	2b3	build/cc2538dk/obj/packetbuf.o
1249	16	180	1445	5a5	build/cc2538dk/obj/tcpip.o
1107	16	5	1128	468	build/cc2538dk/obj/tcp-socket.o
4714	0	9	4723	1273	build/cc2538dk/obj/uip6.o
456	0	24	480	1e0	build/cc2538dk/obj/uipbuf.o
820	24	24	868	364	build/cc2538dk/obj/uip-icmp6.o
146	12	2650	2808	af8	build/cc2538dk/obj/uip-packetqueue.o
9436	68	3029	12533	30f5	(TOTALS)

Contiki-NG: sizeof(RPL-Non-Storing-MOP-only)

text	data	bss	dec	hex	filename
2091	0	0	2091	82b	build/cc2538dk/obj/rpl-dag.o
272	0	17	289	121	build/cc2538dk/obj/rpl-dag-root.o
1244	0	0	1244	4dc	build/cc2538dk/obj/rpl-ext-header.o
1838	48	0	1886	75e	build/cc2538dk/obj/rpl-icmp6.o
340	36	0	376	178	build/cc2538dk/obj/rpl-mrhof.o
196	0	10	206	ce	build/cc2538dk/obj/rpl-nbr-policy.o
1210	20	128	1358	54e	build/cc2538dk/obj/rpl-neighbor.o
697	0	1	698	2ba	build/cc2538dk/obj/rpl.o
306	36	0	342	156	build/cc2538dk/obj/rpl-of0.o
1458	0	64	1522	5f2	build/cc2538dk/obj/rpl-timers.o
9652	140	220	10012	271c	(TOTALS)

Contiki-ng full report

LWIP sizeof network stack

Configuration

Config	Value
LWIP version	2.1.2
DEBUG	OFF
Compiler	arm-none-eabi-gcc
CFLAGS	-Os
MEM_SIZE	1600
MEMP_NUM_PBUF	16
MEMP_NUM_NETCONN	32
PBUF_POOL_SIZE	8
MEMP_NUM_TCP_SEG	16
MEMP_NUM_TCP_PCB_LISTEN	4

FULL LWIP with TCP=0

Text size=87060, Data size=25, BSS size=12816

FULL LWIP with TCP=1

Text size=125124, Data size=33, BSS size=14492

LWIP's TCP ONLY size

Text size=38064, Data size=8, BSS size=1676

LWIP2.1.2 map file

Interested in reproducing the data?

Steps to reproduce:

1. Clone/Download the repo
2. run ./sizeof.sh
3. lwip.md is created in lwip-arm folder
4. Contiki-NG related stats are printed in the output of ./sizeof.sh

(TODO: auto-create contiki-ng.md just like lwip.md)