Messages in this thread |  | | Date | Tue, 20 Nov 2001 16:21:32 -0800 (PST) | Subject | Re: Swap | From | "David S. Miller" <> |
| |
From: Rik van Riel <riel@conectiva.com.br> Date: Tue, 20 Nov 2001 22:19:26 -0200 (BRST)
On Tue, 20 Nov 2001, David S. Miller wrote: > 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. Interesting. I wonder how read() and mmap() compare when the data is in highmem pages and we're facing a kmap()/kunmap() for read() ...
Probably, the performance drops for read() to be equivalent, or slightly below, mmap() peformance. That would be my guess.
Franks a lot, David S. Miller davem@redhat.com - 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/
|  |