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Re: What on Earth is JFFS2 GC doing?



They went down to 2.5 seconds but not back to 250ms as in the first
empty case right?

I'd like to know the time change after just a reboot, if there is any.

Vipin Malik wrote:
> 
> David Woodhouse wrote:
> 
> > What if you just delete all the files and start again?
> 
> Ok, after a rm -rf *
> 
> "df" says:
> 
> /dev/mtdblock1            8192      1876      6316  23% /mnt/jffs1
> (why did it not go back to the 16% used?)
> 
> The console said:
> 
> CHIP_ERASE:Erasing_at_address: 0x4c0000
> CHIP_ERASE:Erasing_at_address: 0x480000
> 
> <now starting my jitter test program)
> 
> JitterTest (my program) says:
> 
> <SNIP>
>  100.015000 ms   0.015000 ms
>  109.992000 ms   9.992000 ms
>  100.006000 ms   0.006000 ms
> 
> <SNIP>
> 
>  100.001000 ms   0.001000 ms
>  100.011000 ms   0.011000 ms
> CHIP_ERASE:Erasing_at_address: 0x440000
>  2793.380000 ms   2693.380000 ms!
>  626.668000 ms   526.668000 ms
>  100.011000 ms   0.011000 ms
>  100.217000 ms   0.217000 ms
>  99.764000 ms   -0.236000 ms
> /dev/mtdblock1            8192      1888      6304  23% /mnt/jffs1
>  101.405000 ms   1.405000 ms
>  98.541000 ms   -1.459000 ms
> 
> <SNIP>
> 
>  99.999000 ms   -0.001000 ms
>  100.004000 ms   0.004000 ms
> CHIP_ERASE:Erasing_at_address: 0x400000
>  2622.155000 ms   2522.155000 ms
>  617.953000 ms   517.953000 ms
>  99.972000 ms   -0.028000 ms
>  116.615000 ms   16.615000 ms
>  113.379000 ms   13.379000 ms
> /dev/mtdblock1            8192      1896      6296  23% /mnt/jffs1
>  99.921000 ms   -0.079000 ms
>  99.999000 ms   -0.001000 ms
> 
> <SNIP>
> 
> Ctrl+C detected. Worst Jitter time was:2693.380000ms
> JitterTest exiting.
> /dev/mtdblock1            8192      1896      6296  23% /mnt/jffs1
> 
> So I guess that jitter times went back down.
> 
> >
> > What if you delete all the files, reboot and start again?
> 
> I didn't do this test, as jitter times had gone back down without even a
> reboot (but I can if you want me to).
> 
> Vipin

-- 
Tim Riker - http://rikers.org/ - short SIGs! <g>
All I need to know I could have learned in Kindergarten
... if I'd just been paying attention.

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