JFFS3 & performance

[jasmine at linuxgrrls.org]

On Fri, 7 Jan 2005, Artem B. Bityuckiy wrote:

> Hmm, why is this better? (I suppose you mean cache line size)

Because ARM926 has a compulsory cache penalty cycle on every line
traversal.  (This is why ARM926 is about 8% slower than ARM925 at
the same clock frequency.)  There is also a penalty on every eighth
page mapped in, because there are only eight microTLB entries and
there are wait states on the main TLB.

> But bake them word-aligned is good.

Not word-aligned, cacheline-aligned.

-J.