Messages in this thread |  | | From | Daniel Phillips <> | Subject | Re: linux-2.4.10-pre5 | Date | Tue, 11 Sep 2001 19:17:55 +0200 |
| |
On September 11, 2001 05:48 pm, Linus Torvalds wrote: > I actually think that the "start read-ahead for inode blocks when you do > readdir" might be a bigger win, because that would be a _new_ kind of > read-ahead that we haven't done before, and might improve performance for > things like "ls -l" in the cold-cache situation.. > > (Although again, because the inode is relatively small to the IO cache > size, it's probably fairly _hard_ to get a fully cold-cache inode case. So > I'm not sure even that kind of read-ahead would actually make any > difference at all).
Having it all in cache makes a huge difference. For:
ls -R linux >/dev/null
it's about 5 seconds cold, about .1 second the second time. A factor of 50!
-- Daniel - 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/
|  |