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Re: zero filling pages

On Wednesday, July 23, 2003, at 17:50, Nat! wrote:
"Clark S. Cox III" <email@hidden>

Zero filling is my bottleneck currently.

Are you sure? how did you determine this.

Using sample. The first routine to touch a page is really expensive.

That doesn't mean that it's the zero-filling that's at fault. Even without zero-filling, the first access to the page would be the most expensive. When you first allocate a page, that page is only logical, it hasn't necessarily been mapped to any physical memory. Only after you first access an address inside that page can you know that the page has been mapped in.
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 >Re: zero filling pages (From: Nat! <email@hidden>)



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