2.4.20rc1 NFS V3 UDP client problems

[Eric Whiting <ewhiting@amis.com>]

I'm seeing some 2.4.20rc1 client problems.

25 seconds to write a 1G file
13 minutes to read that file back

CLIENT 2.4.20rc1 NFSV3 UDP HIGHMEM SUPPORT ON
gigE card with jumbo frames enabled 
Tested with both netgear and intel -- same result

SERVER
Netapps 825 ontap 6.3
gigE card with jumbo frames enabled

private point-to-point connection.

Is this a HIGHMEM problem? Or is it related to jumbo frames? I'll test
with both disabled.

I'm seeing network errors on the client -- dropped and overruns are both
the same.

Anything I should try?
 
eric


# time dd if=/dev/zero of=file1 bs=1G count=1
1+0 records in
1+0 records out

real    0m25.881s
user    0m0.000s
sys     0m4.220s


(run a program to calloc 1G of RAM and clear some buffer cache)


# time dd if=file1  of=/dev/null

2097152+0 records in
2097152+0 records out

real    13m7.445s
user    0m0.370s
sys     0m2.160s

 # ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:02:B3:AC:52:F5
          inet addr:10.0.0.2  Bcast:10.255.255.255  Mask:255.0.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:9000  Metric:1
          RX packets:1534585 errors:10240 dropped:10240 overruns:10240
frame:0
          TX packets:5332748 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:2069590604 (1973.7 Mb)  TX bytes:587855320 (560.6 Mb)
          Interrupt:12 Base address:0xc000 Memory:ea020000-ea040000


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