Re: APIC errors

Maciej W. Rozycki (macro@ds2.pg.gda.pl)
Wed, 17 Jan 2001 12:22:25 +0100 (MET)


On Wed, 17 Jan 2001, Dominik Kubla wrote:

> Just switched to 2.4.0-ac9 (+crypto patches) on our Dual-Pentium MMX
> webserver yesterday. Works fine so far, except i keep seeing those
> APIC erros (about 14 in 12 hrs) indicating receive, send and CS errors.
>
> Should i be concerned?

At this volume I would treat this as a warning but not a critical issue.
Inter-APIC messages get retransmitted in case of an error, but the
checksum circuit is not sophisticated -- a double-bit error might pass
unnoticed leading to a system unstability under certain conditions. At
such a low volume of errors double-bit ones are not likely to happen.

It's the first report of APIC errors on a P5 system I have seen, so it's
probably not a result of a bad motherboard design. I'd recommend to check
if the system doesn't get overheated. You may also be unlucky to have a
faulty board.

Maciej

-- 
+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+--------------------------------------------------------------+
+        e-mail: macro@ds2.pg.gda.pl, PGP key available        +

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