RE: [avr-gcc-list] Whetstone Benchmark

[Weddington, Eric]

> -----Original Message-----
> From: 
> address@hidden 
> [mailto:address@hidden
> org] On Behalf Of Dmitry K.
> Sent: Sunday, January 20, 2008 3:12 PM
> To: address@hidden
> Subject: [avr-gcc-list] Whetstone Benchmark
> 
> Hi.
> 
> A table from 'TI Competitive Benchmark': slaa205b.pdf (July 2006).
> Whetstone Code Size (in bytes) and Cycle Counts.
> IAR C Compiler used (4.12A for AVR), full optimization.
> 
> MCU           Code size  Cycles
> ------------  ---------  ------
> MSP430FG4619       6544  107040
>  MSP430F149        6524  109837
> PIC24FJ128GA       4605  108619
>      8051          8723  291836
>    H8/300H         4656  205910
>    MaxQ20          5392  158945
> ARM7TDMI/Thumb    10532   60444
>     HCS12          7370  787635
>    ATmega8         4694  270991
> 
> avr-gcc 4.1.2 & avr-libc CVS HEAD (Jan 2008) gives:
> MCU           Code size  Cycles  Optimization
> ------------  ---------  ------  ------------
>    ATmega8         4020   88563  -Os -morder1
>    ATmega8         4030   88565  -Os
>    ATmega8         5310   71743  -O3 -morder1
>    ATmega8         5332   71751  -O3
> 
> The dummy functions are added to prevent GCC optimization.
> 
> I am not sure in TI's accuracy. Results for both MSP430-es
> are practicaly equal, despite the fact thar FG4619 has
> considerable enhanced core. Also run time for ATmega8 is
> too big.  Can everbody to make any measurements with
> IAR compiler?

This is fantastic! Thank you so much for doing this!

A couple of quick comments/suggestions:
- Please drop -morder1. We generally don't recommend this to users, and
it looks like it really doesn't affect the results that much
- Can you also try with avr-gc 4.2.2 and avr-libc 1.6.1? These are the
latest released versions.

Thanks,
Eric Weddington