[wbsun]

Good to see such bare metal work in HN, I feel there has been fewer this type of work nowadays.

Back to the OS architecture, AFAIK, exokernel tries to get rid of the OS overhead (context switching, abstractions, etc.) to improve performance back in 1995. But I assume with modern computers/workload, the OS overhead only takes a tiny piece. Is that the case? Are people still optimizing OS heavily for today's workload like AI/ML/servers?