vBNS Performance Sampling
Von Welch
Last Update:
Wed Jul 3 09:38:02 1996 by Von Welch
vBNS Performance as Measured 6/14/96-6/20/96
| Source |
Destination |
Window Size |
MSS |
Write Performance |
Read Performance |
| NCSA - PSC |
| NCSA Dec Alpha |
PSC Dec Alpha |
512 KB |
2048 bytes |
55.6 Mb/s |
57.1 Mb/s |
| vor.ncsa.uiuc.edu |
PSC DEC Alpha |
512 KB |
512 bytes |
8.0 Mb/s |
11.9 Mb/s |
| vor.ncsa.uiuc.edu |
PSC DEC Alpha |
512 KB |
2048 bytes |
41.0 Mb/s |
50.6 Mb/s |
| NCSA - SDSC |
| NCSA Dec Alpha |
SDSC Dec Alpha |
512 KB |
4312 bytes |
58.0 Mb/s |
49.2 Mb/s |
| NCSA Dec Alpha |
SDSC Dec Alpha |
512 KB |
536 bytes |
18.4 Mb/s |
13.7 Mb/s |
| jim.beckman.uiuc.edu |
monty.scripps.edu |
512 KB |
500 bytes |
0.8 Mb/s |
1.2 Mb/s |
| jim.beckman.uiuc.edu |
monty.scripps.edu |
512 KB |
1460 bytes |
0.8 Mb/s |
3.5 Mb/s |
| vor.ncsa.uiuc.edu |
monty.scripps.edu |
512 KB |
1448 bytes |
0.9 Mb/s |
4.2 Mb/s |
| PSC - SDSC |
| PSC Dec Alpha |
SDSC Dec Alpha |
512 KB |
2048 bytes |
46.1 Mb/s |
35.7 Mb/s |
| NCSA - NCSA |
| vor.ncsa.uiuc.edu |
NCSA DEC Alpha |
512 KB |
4096 bytes |
65.3 Mb/s |
43.4 Mb/s |
| jim.beckman.uiuc.edu |
NCSA DEC Alpha |
512 KB |
4300 bytes |
11.8 Mb/s |
9.5 Mb/s |
| jim.beckman.uiuc.edu |
vor.ncsa.uiuc.edu |
512 KB |
4300 bytes |
10.6 Mb/s |
8.8 Mb/s |
| jim.beckman.uiuc.edu |
vor.ncsa.uiuc.edu |
Default |
4300 bytes |
6.2 Mb/s |
6.4 Mb/s |
| SDSC - SDSC |
| monty.scripps.edu |
SDSC DEC Alpha |
512 KB |
512 bytes |
6.3 Mb/s |
1.2 Mb/s |
| fenwick.scripps.edu |
SDSC DEC Alpha |
512 KB |
512 bytes |
1.2 Mb/s |
0.9 MB/s |
| monty.scripps.edu |
fenwick.scripps.edu |
Default |
1460 bytes |
6.4 Mb/s |
6.3 Mb/s |
Host Descriptions
- jim.beckman.uiuc.edu
- A FDDI-attached RS6000 located on the UIUC campus.
- vor.ncsa.uiuc.edu
- A FDDI-attached SGI Challenge located one hop away from the vBNS Cisco.
- monty.scripps.edu
- An ethernet-attached SGI (250 MHz IP22 processor) at Scripps
- fenwick.scripps.edu
- An ethernet-attached SGI (100 MHz IP20 processor) at Scripps
Testing Procedure
The throughputs were measures by running nettest five times betweeb the
host pairs and taking the average read and write throughputs as returned
by nettest. nettest sent and received 1000 60 KB buffers (except when
performance was very poor in which case 100 60 KB buffers were used).