Banshee Makes DRAM Cache up to 50 percent more efficient

Researchers from MIT, Intel, and ETH Zurich have developed a new cache-management scheme that improves the data rate of in-package DRAM caches by 33 to 50 percent. "The bandwidth in this in-package DRAM can be five times higher than off-package DRAM," says Xiangyao Yu, a postdoc in MIT's Computer Science and Artificial Intelligence Laboratory and first author on the new paper. "But it turns out that previous schemes spend too much traffic accessing metadata or moving data between in- and off-package DRAM, not really accessing data, and they waste a lot of bandwidth. The performance is not the best you can get from this new technology."

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