“This paper examines the performance of the Linux kernel
when the system is running a Java program using the IBM Developer
Kit for Linux, Java Technology Edition, Version 1.1.8. The
Java program is the VolanoMark benchmark, a communication-intensive
benchmark that creates a large number of Java threads. This
implementation of the Java technology uses a native-threading
model; each Java thread is supported by an underlying Linux
process. Our measurements show that 20% or more of total system
time spent running this benchmark is spent running the Linux kernel
scheduler. We examine some simple modifications to the scheduler
and their impact on the time spent in the scheduler. Finally, we
suggest changes to the Linux kernel that may more effectively
support applications of this type. In particular, the Linux
scheduler needs to be modified to more efficiently support large
numbers of processes, for which we offer a patch here.
Additionally, we conclude that Linux kernel needs ultimately to be
able to support a many-to-many threading model.”
“One of the most common uses for Linux today is to provide an
effective and load-tolerant platform for a Web server. When
combined with Apache (or another Web server such as AOLServer),
Linux can be the basis for a powerful and inexpensive Web
server.”
“Just as Linux is important for hosting Web servers, Java is an
important component for building scalable, Web-based application
servers. By writing the server-side applications in Java, you can
move the application from platform to platform with relative
ease.”
Web Webster has more than 20 years of writing and editorial experience in the tech sector. He’s written and edited news, demand generation, user-focused, and thought leadership content for business software solutions, consumer tech, and Linux Today, he edits and writes for a portfolio of tech industry news and analysis websites including webopedia.com, and DatabaseJournal.com.
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