CVS commit: src/sys

["matthew green" <mrg%netbsd.org@localhost>]

Module Name:    src
Committed By:   mrg
Date:           Fri Jan 17 04:11:33 UTC 2025

Modified Files:
        src/sys/kern: kern_cpu.c kern_runq.c sched_4bsd.c
        src/sys/sys: cpu.h

Log Message:
partly prepare for more than 2-level CPU speed scheduler support

put the calls behind looking at SPCF_IDLE and SPCF_1STCLASS mostly
behind functions that can grow support for more than 2 CPU classes.
4 new functions, with 2 of them just simple aliases for the 1st:

    bool cpu_is_type(struct cpu_info *ci, int wanted);
    bool cpu_is_idle_1stclass(struct cpu_info *ci)
    bool cpu_is_1stclass(struct cpu_info *ci)
    bool cpu_is_better(struct cpu_info *ci1, struct cpu_info *ci2);

with this in place, we can retain the desire to run on 1st-class by
preference, while also expanding cpu_is_better() to handle multiple
non 1st-class CPUs.  ultimately, i envision seeing a priority number
where we can mark the fastest turbo-speed cores ahead of others, for
the case we can detect this.

XXX: use struct schedstate_percpu instead of cpu_info?

NFCI.


To generate a diff of this commit:
cvs rdiff -u -r1.97 -r1.98 src/sys/kern/kern_cpu.c
cvs rdiff -u -r1.70 -r1.71 src/sys/kern/kern_runq.c
cvs rdiff -u -r1.46 -r1.47 src/sys/kern/sched_4bsd.c
cvs rdiff -u -r1.54 -r1.55 src/sys/sys/cpu.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.