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Bug #609

closed

Kernel build slower in SMP than in UP

Added by andrew_atrens over 17 years ago. Updated almost 16 years ago.

Status:
Closed
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
Start date:
Due date:
% Done:

0%

Estimated time:

Description

nata works fine for me with a UP kernel, and now with SMP, too.

It does not work with SMP + IO_APIC ..

Heh, thanks for the tip!

With just SMP bge and sound are now both working too! :)

Something is still wrong though .. this time perhaps with the scheduler .. :(

doing a kernel build takes almost TWICE as long (wall clock) with an SMP kernel vs
a UP kernel ... and when I watch 'top' during the compile the combined idle times
for the two cores hovers around 90% ..

I can improve things by using -j 4, but it's still slower than building kernel while
running a UP kernel.

Help! :)

Andrew

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