PCTRACK_SIZE
head.pc_ntrack = PCTRACK_SIZE;
for (ntrack = 0; ntrack < PCTRACK_SIZE; ++ntrack) {
struct kinfo_pcheader cputime_pcheader = { PCTRACK_SIZE, PCTRACK_ARYSIZE };
struct kinfo_pctrack cputime_pctrack[MAXCPU][PCTRACK_SIZE];