[TUHS] /dev/drum

ron minnich rminnich at gmail.com
Thu Apr 26 07:30:13 AEST 2018

there's an interesting parallel discussion going on over at riscv about
page size. 4k won the day.

fairly shocking in a world of 4 TiB systems but ...


On Wed, Apr 25, 2018 at 2:21 PM Lawrence Stewart <stewart at serissa.com>

> > 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…
> -L
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