Message Of The Day
Dhrystone-Benchmark with GCC
Tested with dhrystone 1.1 from the package "Keil uVision3", C-Compiler ECO-C-arm V2.2b with IDE (based on GCC 3.3.2), library by PAULundSCHERER (replacing newlib).
Dhrystone was compiled for the controllers LPC2106, LPC2194 and LPC2138 and executed on the real hardware. The controllers ran at 60MHz, with MAM (Memory Access Module) active. The programs ran in the internal FLASH.
Below the results:
| SBC | Controller | Dhrystones | Code Size in Bytes |
Mode | Compiler |
|---|---|---|---|---|---|
| LC2138 | LPC2138 | 56818 53763 |
4733 3541 |
ARM Thumb |
GCC 3.3.2 |
| LC2194 | LPC2194 | 61162 55401 |
4733 3541 |
ARM Thumb |
GCC 3.3.2 |
| NET2106 | LPC2106 | 61162 55401 |
4733 3541 |
ARM Thumb |
GCC 3.3.2 |
There are strange differences between LPC2106/LPC2194 and LPC2138.
The program was also compiled with the Keil-Compiler and executed on NET2106.
Below the results:
| SBC | Controller | Dhrystones | Code Size in Bytes |
Mode | Compiler |
|---|---|---|---|---|---|
| NET2106 | LPC2106 | 30211 30487 |
4512 3424 |
ARM Thumb |
Keil 2.40a |
The code sizes are similar. The bad dhrystone results for the Keil-Compiler, compared to GCC are surprising.
For a detailed discussion of this topic see
http://www.compuphase.com/dhrystone.htm.