sum_credit 378 samples/bpf/hbm.c (qstats.sum_credit / sum_credit 382 samples/bpf/hbm.c (int)(qstats.sum_credit / sum_credit 37 samples/bpf/hbm.h long long sum_credit; sum_credit 200 samples/bpf/hbm_kern.h __sync_add_and_fetch(&(qsp->sum_credit), credit);