Paul Iadonisi wrote:
On Tue, 2005-02-01 at 15:15 -0500, Eric S. Raymond wrote:
>>Processors are not speeding up at all, to a first approximation.
>>Haven't you noticed? Moore's law stopped operating about two years ago.
>Yes, speed increases in single processors have stalled. Which is why
>there are a lot more SMP and multicore systems deployed now. Clocks
>per dollar seems to be continuing to rise on a roughly 2^n curve, even
>though clocks per processor aren't.
Unless rpm and yum are multi-threaded, this makes little difference.
Are they? Seth? Jeff?
Just , FYI,
yum, being python based might have issues with multi threaded operation.
From what I have seen in my zope digging is that python has a thing
called the GIL (or similar?), that for most applications prevents
efficient use of SMP. For a while, SMP could make things slower, but I
believe now that threaded python apps behave OK on most SMP platforms.
According to the info, a complete re-hash of the python interpreter
would be required to give it the ability to scale well using threads on
SMP architectures. Most folk seem to recommend using a multi process
model for python to exploit SMP.