Texas Instruments SPRAA56 appendix Memory Footprint Details

SPRAA56

A.3 Memory Footprint

The total additional code size added to the application for the debugging features was 29 KB of external memory. This was calculated from the size of the .out file with benchmarking added (518 KB) and without benchmarking (491 KB).

All the footprint numbers in this appendix were obtained under the following conditions (expect where noted):

• Platform: EVMDM624

•Debug flags:

-g –ml3 -d"UTL_DBGLEVEL=70" -d"_DEBUG" -d"RTA_INCLUDED" -d"_NTSC" -d"CHIP_DM642" -ml3 -mv6400

•	Optimization:	-o2
•	DSP/BIOS:	version 4.90.27
•	RDTX:	enabled
•	LOG buffers:	2 * 4096(buffer size) + 1 * 256(buffer size) = 8448(8-bit bytes)

The real-time analysis footprint numbers in Table 4 were obtained using the setup described in Section 5.1, Requirements. All sizes are in 8-bit bytes.

	Table 4.	Memory Footprint Details
	All RTA Features	Remove	Remove UTL Calls	Remove Both
	Enabled (as	–D"RTA_INCLUDED"	(Set	–D"RTA_INCLUDED"
	shipped)	Build Option	UTL_DEBUGLEVEL=0)	Build Option and
				UTL Calls
Code Size	11,406,788	11,405,076	11,402,856	11,401,272
Data Size	3347	3347	2643	2643
Bss + Stack	5392	5392	5392	5392
Total	11,415,527	11,413,815	11,410,891	11,409,307
Code Reduction	----	1712	3932	5516
Relative to Case # 1		(0.015% reduction)	(0.034% reduction)	(0.048% reduction)
Data Reduction	----	0 (0%)	704 (21% reduction)	704 (21% reduction)
Relative to Case # 1

Each STS object adds a one-time code size of 128 bytes plus an additional 16 bytes of data space. The STS objects are not removed in any cases in the table above. In this application, the total footprint impact due to STS objects is 496 bytes. (All bytes here are 8-bit bytes.)

Table 4 shows that the impact on space, especially code space, by real-time analysis instrumentation is negligible relative to the application size.

28DSP/BIOS Real-Time Analysis (RTA) and Debugging Applied to a Video Application