***Thursday
October 6
***3:00 - 3:50pm PLEASE NOTE THE SPECIAL TIME !!
Covell 216
Paul McKenney
IBM
Portland
Exploiting Deferred Destruction: An Analysis of Read-Copy-Update
Techniques in Operating System Kernels
In an abstract sense, CPUs have changed very little over
the past couple of decades -- in many cases, 20-year-old
binaries will run on new machines. However, the performance
characteristics of computers systems has changed dramatically
over this period of time, particularly for SMP operating-system
kernels such as Linux. This talk will summarize some of
these changes, and will give an overview of how a recent
synchronization mechanism, namely RCU ("read-copy update")
has greatly improved performance of algorithms involving
read-mostly data structures in the Linux kernel.
Biography
Paul E. McKenney is a Distinguished Engineer at the Linux
Technology Center at IBM Beaverton. He obtained his Ph.D.
in Computer Science and Engineering from the Oregon Health
and Sciences Univerity. His research interests are in the
intersection of SMP performance and scalability and realtime
response. He has authored more than 20 research papers in
SMP algorithms, communications congestion control algorithms,
realtime response, and synchronization primitives. He is a
member of the IBM Academy of Technology, and has been invited
to the Linux Kernel Summit three times (2003-2005). He is
a co-inventor of RCU, but given that something resembling
RCU has been invented independently at least five times,
this might not count for all that much. He holds 19 patents.
His hobbies include running and the usual house-wife-and-kids
habit.
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