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In this work we investigate the sources of error in gem5—a state-of-the-art computer simulator—by validating it against a real hardware platform: the ARM Versatile Express TC2 development board. We design a custom gem5 configuration and make several changes to the simulator itself in order to more closely match the Versatile Express TC2 board. With the modifications we make to the simulator, we are...
Full-system simulators are invaluable tools for designing new architectures due to their ability to simulate full applications as well as capture operating system behavior, virtual machine or hypervisor behavior, and interference between concurrently-running applications. However, the systems under investigation and applications under test have become increasingly complicated leading to prohibitively...
Diverse IP cores are integrated on a modern system-on-chip and share resources. Off-chip memory bandwidth is often the scarcest resource and requires careful allocation. Two of the most important cores, the CPU and the GPU, can both simultaneously demand high bandwidth. We demonstrate that conventional quality-of-service allocation techniques can severely constrict GPU performance by allowing the...
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