Messages in this thread | | | Date | Fri, 4 Dec 1998 19:25:31 +0000 (GMT) | From | Chris Evans <> | Subject | Re: [PATCH] swapin readahead and fixes |
| |
On Thu, 3 Dec 1998, Rik van Riel wrote:
> Hi, > > here is a patch (against 2.1.130, but vs. 2.1.131 should > be trivial) that improves the swapping performance both > during swapout and swapin and contains a few minor fixes.
Hi Rik,
I'm very interested in performance for sequential swapping. This occurs in for example scientific applications which much sweep through vast arrays much larger than physical RAM.
Have you benchmarked booting with low physical RAM, lots of swap and writing a simple program that allocates 100's of Mb of memory and then sequentially accesses every page in a big loop?
This is one area in which FreeBSD stomps on us. Theoretically it should be possible to get swap with readahead pulling pages into RAM at disk speed.
Cheers Chris
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |