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OSDI 2000 Abstract
Taming the Memory Hogs: Using Compiler-Inserted Releases
to Manage Physical Memory Intelligently
Angela Demke Brown and Todd C. Mowry, Carnegie Mellon University
Abstract
Out-of-core applications consume physical resources at a rapid
rate, causing interactive applications sharing the same machine
to exhibit poor response times. This behavior is the result of default
resource management strategies in the OS that are inappropriate
for memory-intensive applications. Using an approach that
integrates compiler analysis with simple OS support and a run-time
layer that adapts to dynamic conditions, we have shown that
the impact of out-of-core applications on interactive ones can be
greatly mitigated. A combination of prefetching pages that will
soon be needed, and releasing pages no longer in use results in
good throughput for the out-of-core task and good response time
for the interactive one. Each class of application performs well
according to the metric most important to it. In addition, the OS
does not need to attempt to identify these application classes, or
modify its default resource management policies in any way. We
also observe that when an out-of-core application releases pages,
it both improves the response time of interactive tasks, and also
improves its own performance through better replacement decisions
and reduced memory management overhead.
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