Thank you to those that responded, and here is the early summary to those
who replied with the same problem. As all the easy stuff has been done, the
solution to this issue may be many months of painstaking work, but I wanted
to share the basics with those having the same problem.
By its very nature the 8400 & GS140 are not optimized for the degpa network
card. The systems have 32 bit PCI bus, and the card will work in a 32 or 64
bit PCI bus. For this reason I never expected true wire speed, but sure
thought something better than 14/16 megabyte/s I am getting can be achieved.
When I installed the degpa's, I left my de500 in and then did a system by
system implementation, and then just left the de500 there.
For this reason, It is strongly recommended to install the degpa in a PCI
bus alone, with no other PCI bus utilizers. Heard this from many. Also on
the hardware side, it is recommended to have plenty of memory available.
Like many of you, I was utilizing FTP to move small, medium, & large files
over the network because FTP reports bytes transferred, time of transfer, &
the transfer rate achieved. I have been told that FTP the best method to
perform this measurement. Jeffery Mogul turned me on to a utility netperf
for performing network benchmarks with. This tool is available from
www.netperf.org. This gets you up to par for performing the measurements
which you can use.
Some responders thought the problem was specific to the compaq 5411 switch
or a specific 4.0f patch kit. I have the same problem on the compaq 5422 &
cisco 3500 switches. There is a new driver in tru64 4.0f patch kit 3 & 4
version 1.0.12. This has no better or any worse for me than the version
1.0.8 in 4.0f patch kit 1. The difficult thing is that this driver has been
optimized for multiple streams, and not a single stream as desired in the
perfect benchmark.
The following sysconfigtab parameters increased gigabit network through-put
by 20%, but the big news was the change produced a 50% improvement in the
network through-put of the de500's.
Sysconfig --> inet stanza
tcp_recievespace = 131072
tcp_sendspace = 131072
udp_recievespace = 131072
udp_sendspace = 16384
Sysconfig --> socket
sb_max = 4194304
Ensure autonegotiate is off
/etc/inet.local
lan_config -i alt0 -a 0
We have not implement jumbo packets yet, but heard from many in the know
that setting mtu to 6000~9000 and corresponding switch changes should make a
significant improvement.
pmob
Received on Fri Dec 08 2000 - 20:34:39 NZDT