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Bill Buros: Improving Performance on Linux

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Various thoughts on the process of improving performance on a Linux system - in a mode of discovering just how much there is to learn. Customers use their systems uniquely - some care passionately about performance, some just want and expect the best "out-of-the-box" experience with no tweaking. I have observed that people in search of performance answers generally want the simple answer, but the practiced answer to any real performance question is: "Well, it depends..." - Bill BurosBill Buroshttp://www.blogger.com/profile/12400195581044294765noreply@blogger.comBlogger26125
URL: http://well-itdepends.blogspot.com/2007/10/linux-is-ready-linux-scalability.html
Updated: 10 min 12 sec ago

IBM and the Jeopardy Challenge

Tue, 06/15/2010 - 13:21
Check out this youtube video. Nice introduction on having a super-computer competing in series of example Jeopardy game shows.

This is just one of numerous fun and still seriously challenging projects being worked these days. The IBM Research teams are amazing. They have found some very interesting performance challenges. The project drives advanced technologies, product improvements, system improvements, performance tool improvements, but most of the work is in the realm of demonstrating complex natural language processing in a time-constrained answer and question world.

Busy time for 2.6.32 kernel on Power7

Fri, 05/21/2010 - 08:48
As things move forward with the launches of IBM's POWER7 systems this year, there's a flurry of activities on many fronts. In particular, we've been pretty busy with the 2.6.32 kernel in many places. Red Hat has a new RHEL Version 6 in beta, the BlueBioU project of course is using 2.6.32, and Novell has announced the latest service pack for SLES 11 which is based on 2.6.32.

Red Hat's RHEL 6 is already in beta (from last month):

* http://press.redhat.com/2010/04/21/red-hat-enterprise-linux-6-beta-available-today-for-public-download/

Novell just announced their latest service pack for SLES 11 which among other things upgrades the kernel to 2.6.32:

* http://www.novell.com/promo/suse/sle11sp1.html

A key proof point at BlueBioU continues to be worked on collaboratively across many teams. Being based on the 2.6.32 enables the easy availability of a number of latest Linux technologies.

* http://bluebiou.rice.edu/

For some example performance FAQs emerging with the work on the 2.6.32 kernel base, check out:

* http://www.ibm.com/developerworks/wikis/display/LinuxP/Performance+FAQs

To check on current questions being posed see the Linux on Power architecture forum at:

* http://www.ibm.com/developerworks/forums/forum.jspa?forumID=375

Some recent questions address the holes in CPU numbering on POWER7 when SMT=2 or SMT=1 is used, how to control the DSCR settings with the ppc64_cpu command, various tools questions, how to dynamically control the SMT settings on a system, page sizes on Linux, etc. Some of the questions are driving functional updates to the commands or approaches in development, so asking a leading question there is always a good thing.