[ih] booting linux on a 4004

[Brian E Carpenter]

On 02-Oct-24 10:19, Michael Greenwald via Internet-history wrote:
> 
> On 10/1/24 1:11 PM, Greg Skinner via Internet-history wrote:
>> Forwarded for Barbara
>>
>> ====
>>
>> From: Barbara Denny <b_a_denny at yahoo.com>
>> Sent: Tuesday, October 1, 2024 at 10:26:16 AM PDT
>> I think congestion issues were discussed because I remember an ICMP message type called source quench (now deprecated). It was used for notifying a host to reduce the traffic load to a destination.  I don't remember hearing about any actual congestion experiments using this message type.
> Of only academic interest: I believe that, circa 1980 +/- 1-2 years, an
> advisee of either Dave Clark or Jerry Saltzer, wrote an undergraduate
> thesis about the use of Source Quench for congestion control. I believe
> it included some experiments (maybe all artificial, or only through
> simulation).
> I don't think it had much impact on the rest of the world.

Source quench is discussed in detail in John Nagle's RFC 896 (dated 1984).
A trail of breadcrumbs tells me that he has an MSCS from Stanford, so
I guess he probably wasn't an MIT undergrad.

Source quench was effectively deprecated by RFC 1812 (dated 1995). People
had played around with ideas (e.g. RFC 1016) but it seems that basically
it was no use.

A bit more Google found this, however:

"4.3. Internet Congestion Control
Lixia Zhang began a study of network resource allocation techniques suitable for
the DARPA Internet. The Internet currently has a simple technique for resource
allocation, called "Source Quench."
Simple simulations have shown that this technique is not effective, and this work
has produced an alternative which seems considerably more workable. Simulation
of this new technique is now being performed."

[MIT LCS Progress Report to DARPA, July 1983 - June 1984, AD-A158299,
https://apps.dtic.mil/sti/pdfs/ADA158299.pdf ]

Lixia was then a grad student under Dave Clark. Of course she's at UCLA now. If she isn't on this list, she should be!

    Brian Carpenter