Department of Information Technology
Uppsala Architecture Research Team

Cache Pirate: Measuring the Curse of the Shared Cache

The Cache Pirate is a low-overhead method for accurately measuring application performance (CPI) and off-chip bandwidth (GB/s) as a function of available shared cache capacity. The method is implemented on real hardware, with no modifications to the application or operating system. We accomplish this by co-running a Pirate application that "steals" cache space with the Target application. By adjusting how much space the Pirate steals during the Target´s execution, and using hardware performance counters to record the Target´s performance, we can accurately and efficiently capture performance data for the Target application as a function of its available shared cache. At the same time we use performance counters to monitor the Pirate to ensure that it is successfully stealing the desired amount of cache.

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Using Pirate Data to predict multicore scaling for cache-bound applications. Poster

The Cache Pirate work received support from the UPMARC research center.

The Cache Pirate was chosen as the Best Paper of ICPP 2011.

Updated  2015-08-19 14:48:03 by David Black-Schaffer.