On Tue, 20 Nov 2001, David S. Miller wrote:
> TLB misses add to the cost, and this overhead is more than
> "noise".
Well, this could have something to do with the fact
that our page fault handler only maps in _1_ page at
a time, so we're trapping into the pagefault handler
every 4kB...
The Apache folks were keeping it mapped across requests,
so even if it was "primed" (ie. pre-faulted), a read() into
a static buffer was still significantly faster.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/