Performance variation in ‘identical’ processors

Re:Performance variation in ‘identical’ processors by tyingq on Sunday January 05, 2020 @10:24PM (#21966163)

That was probablematic in the heyday of all the various Unix vendors. It was pretty common for some machines to vent front to back, others back to front, or large differences in depth, etc. So if you weren't paying attention, you could easily make a multi-stage heater stack in a single rack.

Probably still an issue today, though there's a lot fewer vendors and variation.

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Re:Performance variation in ‘identical’ processors by tallanvor on Monday January 06, 2020 @06:57AM (#21968463)

Old supercomputers - those built before the days of rows of racks - had such character, though! I worked at PNNL in the late 90s, and while they did have newer supercomputers that had a more traditional rack design, they also had a number of older ones that were obviously designed to be seen as well as used.

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