diff options
Diffstat (limited to 'sys/kern/sched_shim.c')
| -rw-r--r-- | sys/kern/sched_shim.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/sys/kern/sched_shim.c b/sys/kern/sched_shim.c index 079d7d73ec45..2dbb6b928961 100644 --- a/sys/kern/sched_shim.c +++ b/sys/kern/sched_shim.c @@ -15,6 +15,7 @@ #include <sys/proc.h> #include <sys/runq.h> #include <sys/sched.h> +#include <sys/sysctl.h> #include <machine/ifunc.h> const struct sched_instance *active_sched; @@ -92,3 +93,51 @@ DEFINE_SHIM0(sizeof_thread, int, sched_sizeof_thread) DEFINE_SHIM1(tdname, char *, sched_tdname, struct thread *, td) DEFINE_SHIM1(clear_tdname, void, sched_clear_tdname, struct thread *, td) DEFINE_SHIM0(init_ap, void, schedinit_ap) + +static char sched_name[32] = "ULE"; + +SET_DECLARE(sched_instance_set, struct sched_selection); + +void +sched_instance_select(void) +{ + struct sched_selection *s, **ss; + int i; + + TUNABLE_STR_FETCH("kern.sched.name", sched_name, sizeof(sched_name)); + SET_FOREACH(ss, sched_instance_set) { + s = *ss; + for (i = 0; s->name[i] == sched_name[i]; i++) { + if (s->name[i] == '\0') { + active_sched = s->instance; + return; + } + } + } + + /* + * No scheduler matching the configuration was found. If + * there is any scheduler compiled in, at all, use the first + * scheduler from the linker set. + */ + if (SET_BEGIN(sched_instance_set) < SET_LIMIT(sched_instance_set)) { + s = *SET_BEGIN(sched_instance_set); + active_sched = s->instance; + for (i = 0;; i++) { + sched_name[i] = s->name[i]; + if (s->name[i] == '\0') + break; + } + } +} + +void +schedinit(void) +{ + if (active_sched == NULL) + panic("Cannot find scheduler %s", sched_name); + active_sched->init(); +} + +SYSCTL_STRING(_kern_sched, OID_AUTO, name, CTLFLAG_RD, sched_name, 0, + "Scheduler name"); |