code size problem ,reduce the code size

[cathychang]

hi everyone,

       I  want to reduce the code size . i reduced the code of psp/bsp and so on ,but the changed of the .s19'code  is so  small. i dont know which one is the improtant about code size?

1. in CodeWarrior Tools ,we can see code and data.
    for example:
        File                              code             data
      -MQX libraries              99k             8554
      -RTCS libraries           80172       15992
      -Source                         13592        5691
2. the size of intflash.elf.s19
      intflash.elf.s19           266KB 
3. read the MQX Code Size Report be created by codesize.exe about intflash.elf.xMAP.
       

MQX Code Size Report

MAP File	intflash.elf.xMAP
Compiler	cwcf7
MQX Core Components Code (ROM)
MQX Core Code	1297
MQX String Code	-
MQX Scheduler Code	2606
Interrupt Management Code	918
Lightweight Memory Manager Code	1328
Lightweight Semaphore Code	776
Memory Manager Code	506
Processor Support Code	940
Queue Management Code	298
Task Management Code	2622
Time Management Code	3825
Task Queues Component Code	612
MQX Optional Components
Event Component Code	-
Idle Task Code	-
I/O Subsystem Code	5338
Kernel Log Component Code	-
Lightweight Event Component Code	-
Lightweight Log Component Code	-
Lightweight Message Component Code	-
Lightweight Timer Component Code	-
Log Component Code	-
Message Component Code	4498
Mutex Component Code	-
Semaphore Component Code	-
Name Component Code	-
Partition Component Code	1422
Command-line TAD Code	-
MPU Support Code	-
Other PSP Code	420
Total of MQX PSP Code	27406
MQX BSP Code (ROM)
BSP Vector Table	1024
BSP Bootstrap Loader Code	-
Board Initialization Code	355
BSP Interrupt Management Code	620
Clock Management Code	-
Low Power Management Code	-
A/D Driver Code	-
APC Flash Driver Code	-
Ethernet Driver Code	1932
Ethernet Phy Driver Code	492
Ethernet FEC Driver Code	5186
NAND Flash Driver Code	-
FLASH Driver Code	-
GPIO Driver Code	-
I2C Driver Code	-
PC-Card Driver Code	-
Real Time Clock Driver Code	-
Serial Port Driver Code	3978
SPI Driver Code	-
FlexCan Driver Code	-
msCan Driver Code	-
Display Driver Code	-
DIU Driver Code	-
Trivial File System Code	-
Timer Driver Code	312
SD Card Driver Code	-
eSDHC Driver Code	-
Other BSP Code	652
Total of BSP Code	14551
Summary of MQX Libraries Code (ROM)
Total of MQX PSP Code	27406
Total of BSP Code	14551
Total of MFS Code	-
Total of RTCS Code	62989
Total of USB Host Code	-
Total of USB Device Data	-
Total of Shell Code	-
System Libraries Code (ROM)
System Library Code (MSL/EWL...)	1554
User Application-related Code (ROM)
Application-specific Code	17697
Overall Total
All ROM Code and Initialized Data sections	124197

  i want to reduce code size, but i dont know which one is  the key factor about code size.

The size (the size of MAX lib + the size of RTCS lib + the size of the Source) is not the same as the size of .s19 ,i want to know what is different about  there kinds of size?

[DavidS · Accepted solution]

Hi cathychang,

Our FTF2012 (Freescale technology Forum) had a class that covered optimization and configuration of MQX:

Hands-on Workshop: Tower System Solutions, Part 3: Optimizing and Configuring an MQX™ RTOS, Intermed...

http://www.freescale.com/webapp/Download?colCode=FTF12_ENT_F0081PDF&location=null&Parent_nodeId=1209...

I find that I do not tune the default configuration much but chaning from the debug target to the release target gives the fastest results as the release target turn more compiler optimizations on.

Hope this helps.

Regards,

David

[c0170]

Hello cathychang,

If you are willing to reduce code size, your concern is  .text section in your map file.

To get familiar with ELF files, read wikipedia article named Executable and Linkable Format and google a bit. You will find out there are more section in ELF file, not only data and code.

How much kB reduction is your goal ?

Regards,

MartinK

[cathychang]

i want to reduce code size into 128KB (this is the upper limit).

The size of .s19 file in my project  is 303KB after added the USB cdc function .

Summary of MQX Libraries Code (ROM)
Total of MQX PSP Code	27568
Total of BSP Code	14799
Total of MFS Code	-
Total of RTCS Code	58595
Total of USB Host Code	512
Total of USB Device Data	18640
Total of Shell Code	-
System Libraries Code (ROM)
System Library Code (MSL/EWL...)	1554
User Application-related Code (ROM)
Application-specific Code	19645
Overall Total
All ROM Code and Initialized Data sections	141313

If it only have  MQX  and RTCS SNMP , the size of .s19 file is about 265KB;

Summary of MQX Libraries Code (ROM)
Total of MQX PSP Code	27406
Total of BSP Code	14551
Total of MFS Code	-
Total of RTCS Code	62989
Total of USB Host Code	-
Total of USB Device Data	-
Total of Shell Code	-
System Libraries Code (ROM)
System Library Code (MSL/EWL...)	1554
User Application-related Code (ROM)
Application-specific Code	17697
Overall Total
All ROM Code and Initialized Data sections	124197

i  want to know how to reduce this code --"All ROM Code and Initialized Data sections" ?