Initial NFS Test: Linux vs FreeBSD (769% slower)

[Rick Macklem]

Marc G. Fournier wrote:
> If you want, you can email me startup.pcap as an attachment and I'll
> take
> a look, but wireshark is pretty good at spotting TCP retransmits, etc.
> 
> 
> 'k, at 4.x Gig in size, doubt your mail server will handle me sending
> this to you :) Even compressed, it was going over 400M … I can if you
> want it though …
>
> 
> Baring that, if you want to give me pointers as to what I should be
> looking for? I have Wireshark installed / and the startup.pcap data
> loaded … the only thing that is jumping out at me is a bunch of lines
> where 'Length' is 32982 while most are 218 … highlighted in 'black
> background, red font' … for example:
> 
The big one is a write RPC and it will be a little more than 32768, if
you've set wsize=32768.

This can't be a capture for the "nfsstat" numbers you emailed the last time.
(For one thing, that one didn't have any write RPCs counted.) Try and get
a capture for the case where there are few NFS RPCs. (Did you capture for
the first time doing the startup after doing a mount vs do an "nfsstat"
for a subsequent startup?) Or, is this client doing something else on the
network while the startup is happening?

I may take a look at it, to see if I can spot anything weird, but a capture
when it only does 88 RPCs is going to be much easier to look at.

rick

> 
> 
> 
> 
> i am doing a bzip2 compressed file right now, and will make it
> available via HTTP, if you are interested …
> 
> 
> 
> 
> 
> 
> The only other thing I can suggest is taking the "soft,intr" options
> off
> your mount and see if that has any effect. Maybe some syscall is
> returning
> EINTR and confusing jboss?
> 
> 
> Tried removing soft,intr … no change, still around 240s …