[CentOS] HT (Hyper Threading) on CentOS 5.5
John R Pierce
pierce at hogranch.com
Fri Mar 9 09:17:27 UTC 2012
On 03/09/12 12:32 AM, Kaushal Shriyan wrote:
> Not sure i understand about your earlier comment regarding pure floating
> point compute, help me understand with some examples.
mostly, numerical scientific processing, and various sorts of multimedia
work, such as batch converting HDTV video formats, 3D animation
rendering, etc.
most architectures, there's only one FPU (floating point unit) per
core... hyperthreading causes each core to act like two cores, which
works great for integer, character, network, etc sorts of processing,
but if the two threads are both trying to do steady floating point or
MMX/SSE style processing, they have to share the same hardware and run
slower.
--
john r pierce N 37, W 122
santa cruz ca mid-left coast
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