Yissum - Research Development Company of the Hebrew University

Knowhow - Improved Cache Performance with Reduced Energy Consumption

Posted by Yissum - Research Development Company of the Hebrew UniversityResponsive · Research Services and Capabilities · Israel

Summary of the technology

•Saves up to 10% of CPU working time
•The patent is a design add-on to the chip
•The estimated price for insertion of the add-on is relatively not significant and one time fee by the chip manufacturers
•There is a consequent reduction in CPU energy drain from 10-40%
•According to the researcher they provide a general solution to other associative searches

Project ID : 10-2007-1832

Yissum - Research Development Company of the Hebrew University

Description of the technology

Available Knowhow

Using Probabilistic Cache Filtering and Set Look-Aside Buffers


Computer science, Computer Architecture

Development Stage

Concept proven


Available Knowhow

Market Size



  • Cache design improves performance by ~10%

  • Win-win situation: design that improves performance also reduces power consumption

  • Consists of a main cache structure preceded by a small, highly associative filter

  • Blocks inserted into the cache are far more likely to be frequently reused, resulting in more efficient utilization of cache space

  • Random sampling cache has better overall performance than larger, more expensive caches

Our Innovation

  • Random sampling of references is used to identify locality and select the memory blocks to be inserted into the cache

  • Selection is completely stateless: No need to maintain any data about previous memory usage

  • Set look-aside buffer (SLB) augments classic CAM tag-store / SRAM data-store design to offer a fast, low-power lookup

The Opportunity

  • Attractive to chip designers seeking improved performance and reduced power consumption

  • Addresses an ever-expanding industry with a state-of-the-art solution

Additional Information

Yoav Etsion and Dror G. Feitelson, "L1 Cache Filtering Through Random Selection of Memory References." In 16th Intl. Conf. Parallel Architectures and Compilation Techniques, Sep 2007. (http://www.cs.huji.ac.il/~etsman/papers/CorePact.pdf)

Project manager

Tamir Huberman
VP Business Dev. Computer Science & IT Director

Project researchers

Yoav Etsion
HUJI, School of Computer Science and Engineering

Dror Feitelson
HUJI, School of Computer Science and Engineering
CS - Machine Learning

Related keywords

  • Information Processing, Information System, Workflow Management
  • IT and Telematics Applications
  • Multimedia
  • Computers
  • Computer Graphics Related
  • Specialised Turnkey Systems
  • Scanning Related
  • Peripherals
  • Computer Services
  • Computer Software Market
  • Other Computer Related
  • Computer Science & Engineering
  • Available Knowhow
  • Computer Architecture

About Yissum - Research Development Company of the Hebrew University

Technology Transfer Office from Israel

Yissum Research Development Company of the Hebrew University of Jerusalem Ltd. Founded in 1964 to protect and commercialize the Hebrew University’s intellectual property. Ranked among the top technology transfer companies, Yissum has registered over 8,900 patents covering 2,500 inventions; has licensed out 800 technologies and has spun-off 90 companies. Products that are based on Hebrew University technologies and were commercialized by Yissum generate today over $2 Billion in annual sales.

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