![]() Unfortunately, how to evictĬaches is CPU dependent and undocumented and despite Gruss, Maurice & Same method as which systematically accessed memory in a pattern thatĬauses the processor to evict the address of the attacker row from the cacheĬausing the next read to go to physical memory. Aweke posted on a forum he was able toįlip bits without clflush – he did not say how, but it was likely using the Also to prevent the capacitors loose charge overtime they are refreshed regularly (typically every 64 ms) by activating the rows. Reading a row into the row buffer is called activating the row.Īn active row is thus cached in the row buffer. Reading automatically discharges the capacitor and since writes rarely rewrite Row is first read into a so called so called row buffer. When you read or write from/to DRAM an entire Thus a row stores 8kb or 64kb of data depending on the exact kind ofĭRAM you have in front of you. Transistor for control and a capacitor which stores charge to signify bit isĮqual to 1 and no charge when bit is equal to 0 (on some chips the encoding is Each cell stores one bit and consists of a There areģ2k rows in the matrix and 16k or 512k cells per row. Inside a bank you’d find a two dimensional matrix of memory cells. ![]() ![]() The banks are in the physical individual chips you can see. If you look at the DIMM most DIMMs will have chips onīoth sides. If you buy a modern memory module for your ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
December 2022
Categories |