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I worked in Solaris internals for a while at Sun during the early java era, and Solaris threading definitely did multiplexing of userspace onto os, and then os

I worked in Solaris internals for a while at Sun during the early java era, and Solaris threading definitely did multiplexing of userspace onto os, and then os onto cores. Do you have a citation (because I can't find one) specifying your assertion that original Java green threads were not analogous to Solaris user -> os -> hardware multiplexing?

dragonwriter 5y ago
> Do you have a citation (because I can't find one) specifying your assertion that original Java green threads were not analogous to Solaris user -> os -> hardware multiplexing? I was writing from memory of second-hand after-the-fact recitations of the history. Doing some followup research prompted by your question, if I understand this document [0] correctly, Java initially had N:1 green threads on Solaris, then M:N green threads on Solaris with 1:1 native threads on Unix and Windows. [0] https://docs.oracle.com/cd/E19455-01/806-3461/6jck06gqe/ https://docs.oracle.com/cd/E19455-01/806-3461/6jck06gqe/
- jjtheblunt 5y ago
  thank you!