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Bug #1182

closed

intr 11 livelock with SMP

Added by mneumann almost 16 years ago. Updated almost 13 years ago.

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

0%

Estimated time:

Description

Hi,

UP works perfectly, SMP has this intr 11 livelock problem, which slows
it pretty down, so that network does not work. I post output of dmesg
for both UP and SMP as well as the output of vmstat -vi. Maybe those
information are helpful to someone :). I also tried SMP with a recent
kernel (the outputs below are of a kernel which is a few month old), but
it's even worse; it stops at "intr 7 livelocked limit engaged" during
ATA probing.

Looking at "vmstat -vi" it's obvious that the problem is with atapci1.
Also notably is the huge difference of "irq0: clk", which is ~1600 for
UP and ~13000 for SMP. I don't know exactly what rate means here, but
if it means interrupts/second and it's the clock interrupt which usually
fires at 1000 Hz, then something is seriously wrong.

Regards,

Michael

Files

Download all files
dmesg.smp (34.3 KB) dmesg.smp mneumann, 12/16/2008 08:18 PM
dmesg.up (31.7 KB) dmesg.up mneumann, 12/16/2008 08:18 PM
vmstat.smp (1.04 KB) vmstat.smp mneumann, 12/16/2008 08:18 PM
vmstat.up (1008 Bytes) vmstat.up mneumann, 12/16/2008 08:18 PM
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