Date: Mon, 3 Mar 2003 18:28:57 -0600 From: "Cagle, John (ISS-Houston)" <john.cagle@hp.com> To: "Spencer Minear" <spencer_minear@securecomputing.com> Cc: <freebsd-smp@freebsd.org> Subject: RE: Compaq 370/380/580 G3 SMP problem details? Message-ID: <C50AB9511EE59B49B2A503CB7AE1ABD10440E41D@cceexc19.americas.cpqcorp.net>
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Spencer,
Peter Wemm checked in a new version of mpapic.c around the end of
January to fix this issue. I have verified that SMP with RELENG_4 now
works with our latest G3 architecture servers, including hyperthreading.
Which version of FreeBSD are you using? Also, can you point me to the
spec that discusses the TPR? I haven't been able to find that one...
Thanks,
John
--------------------------------
John Cagle john.cagle@hp.com
Principal Member Technical Staff
Industry Standard Servers
Hewlett-Packard Company
> -----Original Message-----
> From: Spencer Minear [mailto:spencer_minear@securecomputing.com]=20
> Sent: Monday, March 03, 2003 5:52 PM
> To: freebsd-smp@freebsd.org
> Subject: Compaq 370/380/580 G3 SMP problem details?
>=20
>=20
>=20
> I'm told that there may have been some discussion in a=20
> FreeBSD mail list about the real details behind the problems=20
> with new Compaq G3 servers not running in MP mode. The root=20
> problem appears to be that on these systems, placing a value=20
> of 0x10 in the Local APIC TPR register results in blocking=20
> all interrupts. The spec clearly says that this should not=20
> block interrupts with priorty greater than 1, but it sure=20
> appears to be happening.
>=20
> As mentioned I've been lead to belive that there are some=20
> entries in the FreeBSD mail archive discussing the details=20
> behind the problem, but I cannot find them. I have had one=20
> customer report that upgrading the BIOS on a 370 to the=20
> lastest reve resolved the problem on that system. I have=20
> upgraded the BIOS on the 380 to the lastest available from=20
> Compaq and found that did not provide any change in behavior.
>=20
> If anyone is can point me to the details that may have been=20
> discussed or have more details on the solutions available=20
> from Compaq I would appreciate hearing from you.
>=20
> Thanks,
>=20
> -- Spence Minear
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