On Mon, 2012-11-12 at 01:30 +0100, Karsten Suehring wrote: > > Can you also measure the speed at which the client can write, > when the > server is running each of the two kernel versions? If the > client can > write twice as fast (for example) then it should be OK to use > twice as > high a percentage of CPU time on the server, as the total CPU > time > needed for a data transfer will be the same. > > I tested the following combinations with 2 GB writes: > > Server Client > Debian testing kernel 2.6 Debian stable ~60 seconds > Debian testing kernel 3.2 Debian stable ~60 seconds > > Debian testing kernel 2.6 Ubuntu 12.04.1 ~65 seconds > Debian testing kernel 3.2 Ubuntu 12.04.1 ~67 seconds > > It seems the speed is comparable in all cases although the load > differs. In general my load number looked a bit smaller this time, > maybe because the host system was freshly booted. So I guess, I should > collect some numbers on an actual machine tomorrow. I also did not > have a Debian testing client yet. > > Do you know if the patch mentioned above also affect the client? I don't think it does. Ben. -- Ben Hutchings For every complex problem there is a solution that is simple, neat, and wrong.
Attachment:
signature.asc
Description: This is a digitally signed message part