[clug] Canberra Linux Users Group meeting
u4123459 at anu.edu.au
Tue Feb 20 07:15:35 GMT 2007
Canberra Linux Users Group Meeting - 22nd February 2007
Date: 22nd February 2007 (Fourth Thursday of the month)
Time: 19:00 - 21:00 (or when it finishes)
Speaker: Jeremy Kerr, Hugh Blemings and Nick Piggin
IBM's OzLabs team Open Source Software hackers Hugh Blemings and
Jeremy Kerr will
share this opportunity to offer us a talk on running Linux on the
CELL processor and PS3.
Followed by Nick Piggin, who is currently working for Novell/Suse,
will be giving us a presentation
on his NUMA replicated page-cache for Linux.
Hugh Blemings and Jeremy Kerr¿s talk will explain the new Cell
Broadband Engine (CBE), collaboratively
developed by Sony, Toshiba and IBM. The CBE's novel design aims to
provide a new level of performance
for its most well-known application, the PlayStation 3.
Linux has been a key part of the CBE development process, and is
under constant development within the IBM
Linux on Cell team.
Topics covered include:
* An introduction to the Cell hardware
* State of the Linux on Cell effort
* The Cell programming model, interfaces and methods
* Current applications and performance
* Linux on the Playstation 3
* How to get involved
* Live demonstrations of the above on a Playstation3
Followed is Nick¿s NUMA page-cache replication talk, which is
based on the following:
In a NUMA system, blocks of memory are divided up in nodes, and
the memory throughput and latency depends
on the proximity of the node to the CPU operating on that memory.
A CPU has a local node, in which it achieves the
optimal memory performance, and remote nodes, which are slower.
In the most ideal situation, each CPU in the system would operate
only on its local memory. Linux tries to achieve
this goal by allocating local memory by default. This is a
reasonable strategy, but what happens if memory needs to be
accessed by different CPUs with different local nodes?
One approach is to replicate the shared memory. That is, make a
copy of that memory which is local to each
CPU that accesses it. This can be achieved by replicating pages
that are only being read from, and discard the replicas
when the memory is written to. Despite the limitation to read-only
memory, replication is applicable to a number of
important cases such as shared libraries, program files, and
common data files.
Venue: Room N101
Computer Science and Information Technology Building
The Australian National University
See http://clug.org.au/ for more directions and a map
Food/drink: Pizza, Sushi and soft drink/juice. Come hungry and bring
about $6 for Pizza or $8 for Sushi(booking required) to cover the
cost of your share if you want
If you would like to give a talk at a future meeting, please email me.
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