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《ia-cache-latency-bandwidth-paper》.pdf
Measuring Cache and Memory Latency and CPU to Memory Bandwidth
White Paper Measuring Cache
Joshua Ruggiero
Computer Systems Engineer
Intel Corporation and Memory
Latency and CPU
to Memory
Bandwidth
For use with Intel®
Architecture
December 2008
1 321074
Measuring Cache and Memory Latency and CPU to Memory Bandwidth
Executive Summary
With today’s computer architecture industry focused on clock speed and
processing core count, it is easy to lose sight in other factors that play
important roles in overall system performance. Memory latency and
bandwidth are two major factors of performance. These two key aspects
of system architecture can be broken up into processor cache and system
memory. The open source LMBench Benchmarking suite provides utilities
to accurately measure latency and bandwidth.
Latency and Bandwidth are important measurements to take.
Latency and Bandwidth are important measurements to take. These
measurements are good indicators that describe the impact during the
tuning processes, compare data from one platform to another and
possibly identify other potential performance areas of improvement. The
open source model provides a solution that adds no extra cost of
benchmarking and portable measurements between customers and
manufacturer, different teams within the same organization, or even
separate members of the same team.
§
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