http://www.linux-mag.com/id/6868/ Open Source, Open Standards Sun, 21 Mar 2010 06:26:54 +0000 http://wordpress.org/?v=2.0.11 http://www.linux-mag.com/id/6868/#comment-3159 Sun, 31 Jan 2010 19:01:56 +0000 http://www.linux-mag.com/id/6868/#comment-3159 [...] Supporting NUMA in a contemporary (i.e.: Intel centric) SMP-enabled operating system requires following a bunch of standards, two of which are parsing of two tables, the System Resource Affinity Table (SRAT) and the System Locality Information Table (SLIT). Both tables are accessible via the Advanced Configuration and Power Interface (ACPI), and according to the German-language Wikipedia, the SRAT is used to assign local memory to local threads to boost their performance, and the SLIT defines the “distance” of the nodes among themselves, which is used to determine the “nearest” memory if local memory is not enough. [...] […] Supporting NUMA in a contemporary (i.e.: Intel centric) SMP-enabled operating system requires following a bunch of standards, two of which are parsing of two tables, the System Resource Affinity Table (SRAT) and the System Locality Information Table (SLIT). Both tables are accessible via the Advanced Configuration and Power Interface (ACPI), and according to the German-language Wikipedia, the SRAT is used to assign local memory to local threads to boost their performance, and the SLIT defines the “distance” of the nodes among themselves, which is used to determine the “nearest” memory if local memory is not enough. […]

]]> http://www.linux-mag.com/id/6868/#comment-2566 Thu, 07 May 2009 16:46:30 +0000 http://www.linux-mag.com/id/6868/#comment-2566 [...] #4 Linux Scalability in a NUMA World [...] […] #4 Linux Scalability in a NUMA World […]

]]> http://www.linux-mag.com/id/6868/#comment-1822 Mon, 01 Dec 2008 15:46:12 +0000 http://www.linux-mag.com/id/6868/#comment-1822 [...] #4 Linux Scalability in a NUMA World [...] […] #4 Linux Scalability in a NUMA World […]

]]> http://www.linux-mag.com/id/6868/#comment-1484 Tue, 16 Sep 2008 01:56:20 +0000 http://www.linux-mag.com/id/6868/#comment-1484 I'm curious if there is any support in the Linux kernel for an application to be profiled so that the NUMA model it uses is based on some kind of empirical data. It seems that right now it is up to the application writer to have some understanding of the memory usage behavior the application has in advance. I suppose that each application could provide command-line parameters to select a model, but it would be really great for the application to "observe itself" use memory and adapt dynamically. Do such things exist right now? I’m curious if there is any support in the Linux kernel for an application to be profiled so that the NUMA model it uses is based on some kind of empirical data. It seems that right now it is up to the application writer to have some understanding of the memory usage behavior the application has in advance. I suppose that each application could provide command-line parameters to select a model, but it would be really great for the application to “observe itself” use memory and adapt dynamically. Do such things exist right now?

]]> http://www.linux-mag.com/id/6868/#comment-1483 Tue, 16 Sep 2008 01:00:14 +0000 http://www.linux-mag.com/id/6868/#comment-1483 [...] Linux Scalability in a NUMA World [...] […] Linux Scalability in a NUMA World […]

]]> http://www.linux-mag.com/id/6868/#comment-1481 Mon, 15 Sep 2008 18:41:03 +0000 http://www.linux-mag.com/id/6868/#comment-1481 Excellent introductory article. I will be keeping this in mind while designing a new application. I always wondered if there was a way to control aspects of NUMA. I now have a starting point for researching these NUMA control techniques. Excellent introductory article.
I will be keeping this in mind while designing a new application.
I always wondered if there was a way to control aspects of NUMA.
I now have a starting point for researching these NUMA control techniques.

]]> http://www.linux-mag.com/id/6868/#comment-1478 Mon, 15 Sep 2008 06:50:16 +0000 http://www.linux-mag.com/id/6868/#comment-1478 [...] Go to the author’s original blog: Linux Scalability in a NUMA World [...] […] Go to the author’s original blog: Linux Scalability in a NUMA World […]

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