Fw: FAT-FS HD write speed

[Peter Mueller]

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Hi Eugeny,


On Sat, 11 Jan 2003 20:26:56 +0300 (MSK)
"Eugeny S. Mints" <Eugeny.Mints at oktet.ru> wrote:

> 
> I'll forward you the letter which describes ATA architecture offerred 
> by Oktet. I've sent more letters concerning the issue in october of 2002
> to the rtems-user mailing list - please, try to look into archieve.

Ok

> 
> Ok, but I forgot to ask about one more very significiant parameters: 
> what is proiroties of your (user) task and libblock swapout task? And is
> your (user) task preemtable? (it is important because as I remember Init
> task is non-preemtable).

My init task is preemtable. As far as I saw the priority of the swap-out
task is hardcoded. 

bdbuf.c:27

#define SWAPOUT_PRIORITY 15
#define SWAPOUT_STACK_SIZE (RTEMS_MINIMUM_STACK_SIZE * 2)

One of my user tasks has higher priority but does not do any work while
writing to disk.

Eugeny, what write figures do you measure when writing a dummy file to a
real ide disk? Thomas has
measured 78KByte/sec on his 68040 system with flash disk which is
significant higher than my results on
a real ide disk (5.5kb/s).

Peter

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