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SubjectRe: Linux can't stay up for more than an hour?
Hi Andrea.

>> I have seen a case of a system with 2xP2/400 CPU's and maxed out
>> with RAM perform faster on a UP kernel than an SMP one, so such
>> is possible

> Maybe you should run `make -j80 zlilo' instead of `make zlilo'
> ;). Do you see my point? If you run only one task the
> performances theorically should be the _same_.

Never having used zlilo, I wouldnae know, but the said system was
distinctly faster under the UP kernel than the SMP one with the
following command:

Q> make -j bzImage

Please advise how that compares with your sample?

> With the difference that in smp a kernel you have the spinlock
> overhead, but in the up kernel all irqs are run over the current
> task.

Meaning ???

Best wishes from Riley.

+----------------------------------------------------------------------+
| There is something frustrating about the quality and speed of Linux |
| development, ie., the quality is too high and the speed is too high, |
| in other words, I can implement this XXXX feature, but I bet someone |
| else has already done so and is just about to release their patch. |
+----------------------------------------------------------------------+
* ftp://ftp.MemAlpha.cx/pub/rhw/Linux
* http://www.MemAlpha.cx/kernel.versions.html

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