Hi , i am using gem5 to get data of cache.now i can get the data ,and i can establish a table which represent the data pattern of cache .For the each entry of the table,i create an index ,so everytime i writeback data,i donnot need to write the whole block back,i only need to write back the different bit.but now i have to first write the index with the data in the read block.so i added a index to the Blk.hh.but every time i want to read the index of the block that from upper level,i always get a null,it means my index is gone,so i am stuck.does anyone konws something about this and how to solve this? thanks!
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