Re:Intel Discloses Lakefield CPUs Specifications
by loeg on Wednesday June 10, 2020 @02:13PM
(#23480269)
How would the OS know?
The only mechanism I can come up with is to detect illegal instruction traps on small cores, then flag the thread as big-core-only and re-start the execution at the bad instruction. That's not ideal but maybe workable.
(If it traps on the big core, too, it's just a bad instruction and SIGILL is raised to userspace like usual.)
The only mechanism I can come up with is to detect illegal instruction traps on small cores, then flag the thread as big-core-only and re-start the execution at the bad instruction. That's not ideal but maybe workable.
(If it traps on the big core, too, it's just a bad instruction and SIGILL is raised to userspace like usual.)