Tenex bandwidth

Interface Message Processors for the ARPA Computer Network

“…There are often hard constraints on the numbers of active Jobs or connections on such a system and, cercainly, processing capability limitations. For instance, it is reported in [4] that it takes 13% CPU utilization on TENEX to keep a 2400-baud terminal printing at top speed.) …”

“…By analogy with our analysis of IMP processing bandwidth in Section 2.1.1 and internal throughput measurements in Section 2.2.1.1, we will begin by presenting some results which calibrate the processing capability of the TENEX system. These results are taken from [4], and the measurements shown in Table 6A were found by a similar procedure to that used for subnetwork measurements. A million bits were sent from TENEX to the IMP and back (using BIN/BOUT and the buffered send mode).…”

“…The magnetic tape transfers between TIPs average about 10 kbs, using a private protocol based on the Host/Host protocol which allows the use of a single link only. Prom the TIP to TENEX, it wa.. reported in [4] that a four hour run averaged 7 kbs. It is noted that this accounted for 30% CPU utilization on an unloaded system, wMch means an ultimate TENEX CPU bandwidth of about 20 kbs for this application.…”

Patterns of geographic variation in Florida snakes / by Steven P. Christman.

“…Natural selection creates different phenotypes in response to these different selective regimes. When the degree of But see Murray (1972) for a discussion of genetic diversity maintained by natural selection. phenotypic divergence includes also reproductive incompatibility, the populations involved are said to have reached the species level.…”