FLD_MB_MALIVE
print_fld_size(FLD_MB_MALIVE, mbpool.pr_nget - mbpool.pr_nput);
print_fld_uint(FLD_MB_MALIVE, rxr->rxr_alive);
FLD_MB_LLOCKS, FLD_MB_MSIZE, FLD_MB_MALIVE, FLD_MB_MLWM, FLD_MB_MHWM,