Messages in this thread |  | | From | Anton Blanchard <> | Date | Tue, 9 Jan 2001 22:08:10 +1100 | Subject | Re: Benchmarking 2.2 and 2.4 using hdparm and dbench 1.1 |
| |
> Where is the size defined, and is it easy to modify?
Look in fs/buffer.c:buffer_init()
> I noticed that /proc/sys/vm/freepages is not writable any more. Is there > any reason for this?
I am not sure why.
> Hmm... I'm still using samba 2.0.7. I'll try 2.2 to see if it > helps. What are tdb spinlocks?
samba 2.2 uses tdb which is an SMP safe gdbm like database. By default it uses byte range fcntl locks to provide locking, but has the option of using spinlocks (./configure --with-spinlocks). I doubt it would make a difference on your setup.
> Have you actually compared the same setup with 2.2 and 2.4 kernels and a > single client transferring a large file, preferably from a slow server > with little memory? Most samba servers that people benchmark are fast > computers with lots of memory. So far, every major kernel upgrade has > given me a performance boost, even for slow computers, and I would hate to > see that trend break for 2.4...
I havent done any testing on slow hardware and the high end stuff is definitely performing better in 2.4, but I agree we shouldn't forget about the slower stuff.
Narrowing down where the problem is would help. My guess is it is a TCP problem, can you check if it is performing worse in your case? (eg ftp something against 2.2 and 2.4)
Anton - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
|  |