Piling on cores is one way to boost performance, but it's not necessarily the most efficient way -- researchers at North Carolina State University have developed a new prefetching technique for processors that could boost performance by up to 40-percent. As you may know, any data not stored in a CPU's cache must be pulled from RAM, but as more cores are added they can create a bottleneck by competing for memory access. To counter this designers use prefetching to predict what information will be needed and grab it ahead of time, but guessing wrong can hurt performance. Researchers tackled this problem from two fronts: first, by creating a better algorithm for divvying up bandwidth, and second, by selectively turning off prefetching when it might slow the CPU.
Showing posts with label cpus. Show all posts
Showing posts with label cpus. Show all posts
Researchers boost multi-core CPU performance with better prefetching
Piling on cores is one way to boost performance, but it's not necessarily the most efficient way -- researchers at North Carolina State University have developed a new prefetching technique for processors that could boost performance by up to 40-percent. As you may know, any data not stored in a CPU's cache must be pulled from RAM, but as more cores are added they can create a bottleneck by competing for memory access. To counter this designers use prefetching to predict what information will be needed and grab it ahead of time, but guessing wrong can hurt performance. Researchers tackled this problem from two fronts: first, by creating a better algorithm for divvying up bandwidth, and second, by selectively turning off prefetching when it might slow the CPU. 
Intel goes ULV for laptops to combat the oncoming tablet horde
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Intel has been talking up its x86-powered smartphones and battery-sipping Atoms for tablets quite a bit recently, but the company hasn't forgotten its roots in traditional PC form-factors. At an investor event in San Francisco, CEO Paul Otellini announced a significant change to its line of notebook CPUs -- ultra low voltage will be the new norm, not just a niche chip for high-end ultra-portables. The baseline voltage for future CPUs will be in the 10 to 15 watt range, a huge drop from the 35w design of the mainstream Core line and lower than even current-gen ULV chips (which bottom out at 17w). The company also plans to make NVIDIA eat its words by putting the pedal to the metal on die shrinks -- releasing a 22nm Atom next year followed by a 14nm version in 2013. That could mean our fantasy of true all-day battery life in a sleek and sexy laptop will finally come true. Don't crush our dreams Intel!
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