Fri, July 24, 2009, 05:26 PM under
Windows
As you know by now,
Windows 7 supports up to 256 logical processors (a
4-fold increase from previous versions). A few months ago I
posted my screenshot of a system with 128 cores and reader kotsoft asked why the CPU utilization was at 50%.
The reason is that I was running a straightforward .NET 4 app that used TPL and the CLR 4 ThreadPool does not take advantage of more than 64 cores. Digging deeper reveals that there are certain
new (native obviously) APIs that an application must use to go beyond the 64-core support and specifically the ones
described here about processor groups – the CLR is not utilizing them in this release.
I wonder who will be the first to wrap these functions from managed code and show an example of their usage…