kstat_lookup_read
if ((ksp = kstat_lookup_read(kc, "cpu", i, "sys")) == NULL)
sys_misc = kstat_lookup_read(kc, "unix", 0, "system_misc");
if ((ksp = kstat_lookup_read(kc, "cpu_info", i, NULL)) == NULL)
if ((ksp = kstat_lookup_read(kc, "cpu", i, "vm")) == NULL)