[TUHS] /dev/drum

Lawrence Stewart stewart at serissa.com
Thu Apr 26 07:14:14 AEST 2018

> On 2018, Apr 25, at 4:45 PM, Larry McVoy <lm at mcvoy.com> wrote:
>>> Our comment was that ???It ain???t VIRTUAL memory if it isn???t all there??? as
>>> opposed to virtual addressing.
>> Gene Amdahl was not a fan of paging.  He said that virtual memory
>> merely magnifies the need for real memory.
> Wasn't that a Seymour Cray quote?  Seems like he was also not a fan of VM.

My favorite is due to Dave Clark at MIT: “Anytime someone says ‘virtual’ you should think ‘slow’”

followed closely by “Any problem in computer science can be solved by adding a layer of abstraction” and “Any performance problem can be solved by removing a layer of abstraction.”

As one converted to the HPC cults, I am naturally opposed to small pages, virtual anything, and interrupts…


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