y**b
发帖数: 10166 | 1 就是说i7的QPI只是连接到IOH，不能连接到其他CPU(也没有双i7主板)，
因而不支持NUMA。
是不是只有多路Xeon才支持NUMA，而多路Xeon工作站的bios通常可以
打开或关闭NUMA选项(比如Dell Precision T7500)。
新一点的超级计算机的节点默认就是NUMA模式吧，比如
Dual Hex-core Intel Xeon X5660 (Westmere)
而旧一点的可能还是FSB模式，比如
Dual Quad-core Intel Xeon E5472 (Harpertown)。 | s*******s
发帖数: 1250 | 2 Afaik i7 processors have it, however you wont probably ever use it on
single processor machine.
Intel Xeon 5500 processor series, the Intel Core i7 series (Nehalem), and the AMD Opteron processor series | y**b
发帖数: 10166 | 3 那样的话，i7是不是有点浪费了呢(支持QPI连接多路处理器(?)却又没有相应主板)？
我发这个贴的原意倒是想问这个问题。因为板上用i7的不少，网上也有人问为什么
没有双路i7主板。
http://en.wikipedia.org/wiki/Intel_QuickPath_Interconnect
The QPI is an element of a system architecture that Intel calls the QuickPat
h architecture that implements what Intel calls QuickPath technology.[4] In
its simplest form on a single-processor motherboard, a single QPI is used to
connect the processor to the IO Hub (e.g., to connect an Intel Core i7 to a
n X58). In more complex instances of the architecture, separate QPI link pai
rs connect one or more processors and one or more IO hubs or routing hubs in
a network on the motherboard, allowing all of the components to access othe
r components via the network. As with HyperTransport, the QuickPath Architec
ture assumes that the processors will have integrated memory controllers, an
d enables a non-uniform memory access (NUMA) architecture. It was first rele
ased in Xeon processors in March 2009 and Itanium processors in February 201
0.
Although some Core i7 processors use QPI, other Nehalem desktop and mobile p
rocessors (e.g. Core i3, Core i5, and other Core i7 processors) do not - at
least in any externally accessible fashion. These processors cannot
participat
e in a multiprocessor system. Instead, they directly implement the DMI and P
CI-e interfaces, obviating the need for a "northside" device or a processor
bus of any type.
我猜想即使是支持QPI的i7也不支持多处理器互联，也就不支持NUMA。
the AMD Opteron processor series
【在 s*******s 的大作中提到】
: Afaik i7 processors have it, however you wont probably ever use it on
: single processor machine.
: Intel Xeon 5500 processor series, the Intel Core i7 series (Nehalem), and the AMD Opteron processor series
|
|
