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Altera_Forum's avatar
Altera_Forum
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16 years ago

Linux with MMU on NEEK

Hi, all. I'm testing Linux MMU version, on my NEEK. http://www.nioswiki.com/linux It works fine and I can use "bash" shell. This is the evident proof that we are using the true 'fo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Hi,

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So it is not correctly implemented. All Altera example designs use much more cache !

What should we do about that ?

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I'm not sure that Wind River guys had implemented a correct mechanism to deal with the 'alias problem'. So give me some time to check it.

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I feel that 4K cache will degrade performance a lot.. I did not test this thoroughly, but I once did a speed test with a uCLinux vs a fill lunux design and found that the full Linux design was much slower (up to half speed). I'm not sure about the cache sizes, though

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Please take account of the kernel with MMU which must do many tasks compared to no-MMU version and we can enjoy many excellent features instead of its lower performance.

Kazu