Hi,
These numbers don't look correct at all. Overhead of a bridge should be virtually nothing on latency, and zero on bandwidth. Are you sure you don't have autonegotiation messing up somewhere? cheers, Lennert On Tue, Oct 09, 2001 at 03:05:19PM -0500, Cannon, Mike R. wrote: > bridge overhead information and question: > > I am still running my original bridge configuration with the experimentally > patch on the 2.4.10 kernel. I have done some initial performance testing. > I did 4 test with two different servers to the same workstation: > > no bridge > UNIX ftp > 38164563 bytes sent in 6.3 seconds (5.9e+03 Kbytes/s) same 36.3 MB > file below for NT SSL transfer > 38164563 bytes sent in 6.2 seconds (6e+03 Kbytes/s) same 36.3 MB > file below for NT SSL transfer > 672202181 bytes sent in 1.2e+02 seconds (5.6e+03 Kbytes/s) > 672202181 bytes sent in 1.3e+02 seconds (5.2e+03 Kbytes/s) > NT SSL file transfer > 36.3 MB in 15 sec 2.42 MB/sec > 36.3 MB in 15 sec 2.42 MB/sec > 36.3 MB in 15 sec 2.42 MB/sec > > > > bridge with 3Com switch > UNIX ftp > 38164563 bytes sent in 10 seconds (3.7e+03 Kbytes/s) same 36.3 MB > file below for NT SSL transfer > 38164563 bytes sent in 9.9 seconds (3.8e+03 Kbytes/s) same 36.3 MB > file below for NT SSL transfer > 672202181 bytes sent in 1.8e+02 seconds (3.6e+03 Kbytes/s) > 672202181 bytes sent in 1.8e+02 seconds (3.6e+03 Kbytes/s) > NT SSL file transfer > 36.3 MB in 21 sec 1.73 MB/sec > 36.3 MB in 22 sec 1.65 MB/sec > 36.3 MB in 17 sec 2.14 MB/sec > > > for ftp on the 36.2 MB file we add 4 sec when using the bridge > for ssl on the 36.2 MB file we add 2 to 7 sec when using the bridge > > Do these figures look accurate for the over head that is added to packets > moving through the bridge? I realize that there are lots of variables like > machine speed and NIC drivers/settings, but just initially might these look > correct? > > > -- > Mike Cannon > Infrastructure Systems Administrator > Management Information > Purdue University > 1061 Freehafer Hall (FREH) > West Lafayette, IN 47907-1061 > > office phone: 765.494.6357 > office fax: 765.496.1380 > email: [EMAIL PROTECTED] -- I are sigfile disease!! All your quote are belong to us. Copy us every "sig"! _______________________________________________ Bridge mailing list [EMAIL PROTECTED] http://www.math.leidenuniv.nl/mailman/listinfo/bridge
