Messages in this thread |  | | Date | Tue, 20 Aug 1996 12:11:30 -0400 | Subject | Re: SMP locks up when NFS times out | From | Lee Hetherington <> |
| |
Just to follow up to my own problem.
I should have pointed out that my NFS mounts were with rsize=4096 and wsize=4096. Without that my NFS speed is horrifically slow. An 8MB file takes about 25s to read. With the 4k parameters that goes down to about 8.6s (on an unloaded ethernet). I get these bad speeds with both 3c509 and 3c590. Note that our NetworkAppliance fileserver uses 4k blocks, so this might be a factor. Maybe this should be a separate thread. Should I expect decent NFS performance with NFS 1k?
OK. If I mount NFS with the default 1k packet sizes, Linux SMP does not lock up on me!!! This sounds like a big clue to the problem.
So, could some of you out there try my crash method (pulling the ethernet wire during a big NFS read) after mounting with rsize=4096 and wsize=4096? I'll bet you'll lock up Linux SMP!
Lee Hetherington ilh@lcs.mit.edu
|  |