[CentOS] HT (Hyper Threading) on CentOS 5.5
John R Pierce
pierce at hogranch.com
Fri Mar 9 02:54:22 EST 2012
On 03/08/12 11:44 PM, Sorin Srbu wrote:
> I know there might be some negative performance issues with certain
> applications, but would you notice it in day-to-day use?
if you're using the server for pure floating point compute, don't run
more threads than you have actual cores. high concurrency server
workloads that aren't IO bound generally benefit quite a lot from using
hyperthreads to double the number of active workers. the HT on the
X5600 and such newer Xeons is quite a lot better than the old
netburst/p4 architecture where the benefits were marginal in many cases.
john r pierce N 37, W 122
santa cruz ca mid-left coast
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