sum_out
sum_out("swap ins", &ss->ss_agg_vm, "swapin");
sum_out("swap outs", &ss->ss_agg_vm, "swapout");
sum_out("pages swapped in", &ss->ss_agg_vm, "pgswapin");
sum_out("pages swapped out", &ss->ss_agg_vm, "pgswapout");
sum_out("page ins", &ss->ss_agg_vm, "pgin");
sum_out("page outs", &ss->ss_agg_vm, "pgout");
sum_out("pages paged in", &ss->ss_agg_vm, "pgpgin");
sum_out("pages paged out", &ss->ss_agg_vm, "pgpgout");
sum_out("total reclaims", &ss->ss_agg_vm, "pgrec");
sum_out("reclaims from free list", &ss->ss_agg_vm, "pgfrec");
sum_out("micro (hat) faults", &ss->ss_agg_vm, "hat_fault");
sum_out("minor (as) faults", &ss->ss_agg_vm, "as_fault");
sum_out("major faults", &ss->ss_agg_vm, "maj_fault");
sum_out("copy-on-write faults", &ss->ss_agg_vm, "cow_fault");
sum_out("zero fill page faults", &ss->ss_agg_vm, "zfod");
sum_out("pages examined by the clock daemon", &ss->ss_agg_vm, "scan");
sum_out("revolutions of the clock hand", &ss->ss_agg_vm, "rev");
sum_out("pages freed by the clock daemon", &ss->ss_agg_vm, "dfree");
sum_out("forks", &ss->ss_agg_sys, "sysfork");
sum_out("vforks", &ss->ss_agg_sys, "sysvfork");
sum_out("execs", &ss->ss_agg_sys, "sysexec");
sum_out("cpu context switches", &ss->ss_agg_sys, "pswitch");
sum_out("device interrupts", &ss->ss_agg_sys, "intr");
sum_out("traps", &ss->ss_agg_sys, "trap");
sum_out("system calls", &ss->ss_agg_sys, "syscall");
sum_out("user cpu", &ss->ss_agg_sys, "cpu_ticks_user");
sum_out("system cpu", &ss->ss_agg_sys, "cpu_ticks_kernel");
sum_out("idle cpu", &ss->ss_agg_sys, "cpu_ticks_idle");
sum_out("wait cpu", &ss->ss_agg_sys, "cpu_ticks_wait");