Just accelerate traps?

Posted Jan 26, 2025 22:35 UTC (Sun) by Sesse (subscriber, #53779)
In reply to: Just accelerate traps? by bushdave
Parent article: The trouble with the new uretprobes

Ironically, in the old days (386), it was the other way round: Traps were faster than syscalls.[1]

[1] To the degree “syscall” was a more sanctioned way to make a syscall, e.g., INT some_value. The SYSCALL instruction didn't exist yet.