histlog2_print(fp, "sizes histogram (bytes)", p->size_hist, &size_hist);
histlog2_print(fp, "d2c histogram (usec)", p->d2c_hist, &d2c_hist);
fprintf(fp, "bidirectional requests: %ld\n", (unsigned long)p->bidir);
histlog2_print(fp, "sizes histogram (bytes)", p->size_hist, &size_hist);
histlog2_print(fp, "d2c histogram (usec)", p->d2c_hist, &d2c_hist);
fprintf(fp, "bidirectional requests: %ld\n", (unsigned long)p->bidir);