[linux-cifs-client] smbclient 8 times faster than cifs

[Steven French]

One quick thing to try when I post the slightly newer code is to mount 
with the "direct" option on the client which will bypass the page cache. 

I will need to look at why smbclient is much faster - off the top of my 
head - the only reason I can think of larger read and write size - the 4K 
page size caused by writing through the clients page cache made worse  by 
serialized access.  I know how to address this but only part of the code 
for it is checked in (but disabled) - fortunately mounting with the 
"direct" option helps (at least in the path writing to the server).


Steve French
Senior Software Engineer
Linux Technology Center - IBM Austin
phone: 512-838-2294
email: sfrench at-sign us dot ibm dot com



Kenneth Porter <shiva at sewingwitch.com> 
Sent by: linux-cifs-client-bounces+sfrench=us.ibm.com at lists.samba.org
12/07/2004 07:44 AM

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[linux-cifs-client] smbclient 8 times faster than cifs






I'm trying to get the connection to my Win2k box fast enough that I can 
get 
reasonable dump times for a large filesystem. Alas, smbfs gives me about 
550 kBps, and cifs gives me about 1.25 MBps. Writing a 602 MByte file with 

cifs takes 8 minutes. But with smbclient, I can copy the same file in 
about 
a minute. I get comparable times pulling the file from a smbd share on the 

Linux side.

System is Fedora Core 2 with 2.6.9-1.6_FC2 kernel. modinfo cifs reports:

version:        1.20 BD05AA287A833DA8A57BDC6
vermagic:       2.6.9-1.6_FC2 686 REGPARM 4KSTACKS gcc-3.3

What can I look at to help bring cifs up to smbclient performance? What 
debugging trace do you need?
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