Linux Kernel Network Subsystem Patching

[Lennart Sorensen]

On Sat, Jan 11, 2014 at 07:48:21PM -0500, Walter Dnes wrote:
>   "Hyperthreading" isn't all it's cracked up to be.  In theory it's
> supposed to help a lot, in practice it can actually slow down a machine,
> as you've seen.

In theory is could help, and in theory it could hurt.  In practice that
is true too.

It is NOT expected to help in general if your two threads are doing the
same kind of thing since then they will usually be trying to use the
same execution units in the CPU.  A thread doing integer work at the
same time as one doing floating point work is probably the best case.
Also the P4 was terribly designed, and really not equiped to handle
extra instructions at a time anyhow.

-- 
Len Sorensen
--
The Toronto Linux Users Group.      Meetings: http://gtalug.org/
TLUG requests: Linux topics, No HTML, wrap text below 80 columns
How to UNSUBSCRIBE: http://gtalug.org/wiki/Mailing_lists