From mboxrd@z Thu Jan 1 00:00:00 1970 From: stewart@serissa.com (Lawrence Stewart) Date: Wed, 25 Apr 2018 17:14:14 -0400 Subject: [TUHS] /dev/drum In-Reply-To: <20180425204548.GI15245@mcvoy.com> References: <8225C5DB-27BD-464E-930A-522C30C20EBD@tfeb.org> <25A1FED0-4F8B-408F-B27B-5728C649D8BE@collantes.us> <7wfu3nuqeb.fsf@junk.nocrew.org> <24637D2D-4865-4E45-821B-529CAEEA5589@ronnatalie.com> <20180425204548.GI15245@mcvoy.com> Message-ID: > On 2018, Apr 25, at 4:45 PM, Larry McVoy 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