>> How wide is a typical cache line?
> 
> 
> Warp said 32 bytes. I thought that was way smaller than I remembered, 
> but I went and variously tracked it down, and indeed, most of the modern 
> machines seem to have 32-byte cache lines.  I think they used to be 
> wider, like 128 bytes, but maybe I'm misremembering, or thinking of 
> mainframes, or something.

Right. So just to make sure I understand this... you're saying the cache 
is managed in chunks of 32 bytes at a time? Like, if you fetch 1 byte of 
data from memory, 32 bytes will be loaded into the least recently used 
cache line? (Or whatever the cache policy is.)

Are the cache lines aligned in any sort of way? (I'm wondering if it 
grabs 32 bytes at the nearest 32-byte boundary or not.)

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

Post a reply to this message