At 3:31pm -0500 Wed, 02 Feb 2011, Michael Meeks wrote:
On Wed, 2011-02-02 at 13:44 +0000, Wols Lists wrote:
Not quite sure what you mean by "legacy Intel", but if you're
referring to all single-processor CPUs, they still power most of
the budget brand new laptops!
Surely those guys are hyper-threaded by now ? at least the Atom
(which is cheap as chips [sic] ;-) is.
I recognize this comment was in gest, but thought I'd chime in with a
tidbit. I believe that Intel removed HTT after the Pentium 4 chip. Of
note, as well, is that hyperthreading (HTT) is not as "universal" an
upgrade as true multi-core chips. In fact, the general practice in the
High Performance Computing (HPC) community is to turn off hyperthreading
because it degrades performance for most workloads.
A further note is that there is some skepticism as to the security of
HTT, in terms of side-channel monitoring of in-core process data.
Actually, now that I just wrote the above, I seem to recall a discussion
of HTT technology in the Nehalem chip. When I have time, I might
research that ...
Cheers,
Kevin
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