PERF_MEM_LVLNUM_NA
data_src->mem_lvl_num = PERF_MEM_LVLNUM_NA;
data_src->mem_lvl_num = PERF_MEM_LVLNUM_NA;
data_src->mem_lvl_num = PERF_MEM_LVLNUM_NA;
[PERF_MEM_LVLNUM_NA] = "N/A",
if (lvl && lvl != PERF_MEM_LVLNUM_NA) {