Re: Re: [microblaze-uclinux] Re: Re: [uClinux-dev] Regarding the xmbserial

[anand_12 <anand_12@xxxxxxxxxxxx>]

Hi john,

 I restored the TTY_FLIPBUF_SIZE to 512 bytes and commented out #define ACKNOWLEDGE_AFTER,then compiled the image and ran it...I was not sure about the extent to which I should increase the size of the text file..I used 3 sizes and here are the results :



 file size(of text dumped on prompt)      result observed

  5 kb                                      no problems
 12 kb                                      no problems
 20 kb                                      no problems

where :
 "no problems" -> the entire text is printed pretty fast
 on the console and sometimes inferred as commands(bad command errors..no such command etc)...and after printing the entire text...it returns the prompt..and i am able to continue with the interactive shell session  without any problem...

if it helps...before returning to the prompt again...the last line printed was :


  ......................end of text file..........
 sh 362 : child 524 died
 [524]
 /bin>
 /bin>

I am not sure whether 5/12/20 kb is big enough..if not..then you can accept this as an intermediate result..and also let me know how large is "large text"?..thanks...

besides one more thing that I observed here is the serial console was very fast too in responding to my commands..no sluggishness as was observed before commenting that line in microblaze_intc.c..

how is this action of commenting out that line related to the TTY_FLIPBUF_SIZE(if at all)?..both seem to be achieving the same result...of improved speed(servicing all interrupts in good time)...

thanks for any clarification


Cheers

V.Anand
(www.tenet.res.in)











Hi Anand,
>
>anand_12 wrote:
>
>>  thanks for your prompt clarification again..yeah!!..a better thing would be to fix the bug itself rather than
>> find workarounds...:-)..
>
>Can you try something - in 
>linux/arch/microblaze/kernel/microblaze_intc.c, comment out or remove 
>the line
>
>#define ACKNOWLEDGE_AFTER
>
>Do a rebuild, and try to crash the serial driver with a large text 
>paste.  Make sure you revert the earlier change you made in the linux 
>header.
>
>Thanks,
>
>John
>_______________________________________________
>uClinux-dev mailing list
>uClinux-dev@uclinux.org
>http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
>This message was resent by uclinux-dev@uclinux.org
>
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