Re:Ask HN: Why did stack-based CPUs lose out?
by toast0 on Saturday December 31, 2022 @01:53PM
(#34199463)
> With modern CPU's having so many cores and threads being so cheap, couldn't NASA use these for redundancy?
Maybe? But CPU cost basically doesn't matter compared to launch cost. Power budget given the required computing needs during critical sections of the mission is probably the biggest priority after reliability. Modern cpus are good at compute/watt, but not necessarily at low watts at low load.
No idea re: feature size, for cosmic rays and dram, it was thought that shrinking beyond some point was going to increase failures dramatically, but then it was fine. But in space radiation is more than cosmic rays.
Maybe? But CPU cost basically doesn't matter compared to launch cost. Power budget given the required computing needs during critical sections of the mission is probably the biggest priority after reliability. Modern cpus are good at compute/watt, but not necessarily at low watts at low load.
No idea re: feature size, for cosmic rays and dram, it was thought that shrinking beyond some point was going to increase failures dramatically, but then it was fine. But in space radiation is more than cosmic rays.