I wonder if the numbers are still this good if you consider more supercomputers.
Great question. My guess is not terribly different.
“Top 500 Supercomputers” is arguably a self-referential term. I’ve seen the term “super-computer” defined whether it was among the 500 fastest computer in the world, on the day it went live.
As new super-computers come online, workloads from older ones tend to migrate to the new ones.
So there usually aren’t a huge number of currently operating supercomputers outside of the top 500.
When a super-computer falls toward the bottom of the top 500, there’s a good chance it is getting turned off soon.
That said, I’m referring here only to the super-computers that spend a lot of time advertising their existence.
I suspect there’s a decent number out there today that prefer not to be listed. But I have no reason to think those don’t also run Linux.
Oh yes! To be clear - trying to put any version of Windows on a super-computer is every bit as insane as you might imagine. By what I heard in the rumor mill, it went every bit as badly as anyone might have guessed.
But I like to root for an underdog, and it was neat to hear about Microsoft engineers trying to take the Windows kernel somewhere it had no rational excuse to run, perhaps by sheer force of will and hard work.