From: Andi Kleen <ak@muc.de>
To: Yinghai Lu <yhlu@tyan.com>
Cc: "'Mikael Pettersson'" <mikpe@csd.uu.se>,
jamesclv@us.ibm.com, Matt_Domsch@dell.com, discuss@x86-64.org,
linux-kernel@vger.kernel.org, suresh.b.siddha@intel.com
Subject: Re: 256 apic id for amd64
Date: 10 Jan 2005 19:44:37 +0100
Date: Mon, 10 Jan 2005 19:44:37 +0100 [thread overview]
Message-ID: <20050110184437.GA74665@muc.de> (raw)
On Mon, Jan 10, 2005 at 10:32:42AM -0800, Yinghai Lu wrote:
> Resend
>
> Andi,
>
> I want to repeat the request:
> Please consider to compute the phy_proc_id with x86_apicid (or the initial
> apic id).
Not sure what you want me to do exactly.
The phys_proc_id[] array? First that isn't really used for anything and then
it is filled from CPUID 1 anyways. Or phys_pkg_id()? That uses cpuid too.
If you think something is wrong best you send a patch that makes it
clear what you're talking about.
>
> The reason is
> Phy_proc_id will be used in smpboot.c to produce cpu_siblings_map.
>
> The two systems I mentioned really exist.
> System 1. 8 ways dual core opteron system and with 3 io apic.
> System 2. 4 ways dual core opteron system and with 15 io apic (7 amd 8131
> and 1 amd 8111).
>
> We have to lift the apicid of cpus to make io apic to use 0-15.
I don't understand why you want to do that. The IO-APIC and the local APIC ID
space should separate as far as I know, so you could use 0 for both a CPU
and an IO-APIC. But in theory it should work anyways even with an BSP
CPU ID != 0.
> Case 1: lift core0/node0 to use 16, and core1/node0 to use 17.....
> Case 2: core0/node0-->0, core1/node0-->1, core0/node1-->18,
> core1/node1-->19...
> Case 3: core0/node0-->0, core1/node0-->17, core0/node1-->18,
> core1/node1-->19...
>
> Case 1 will make jiffies not happy and it will hang on calibrate_dalay. (
> jiffies is not changing).
That's because it needs physical APIC mode to handle CPU IDs >7, and that is
not implemented in the flat case. I added it now, but you likely don't need
it anyways.
-Andi
next reply other threads:[~2005-01-10 18:52 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-10 18:44 Andi Kleen [this message]
2005-01-11 4:04 ` 256 apic id for amd64 Siddha, Suresh B
2005-01-11 4:39 ` Andi Kleen
2005-01-11 17:50 ` Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2005-01-11 19:11 YhLu
2005-01-11 19:04 YhLu
2005-01-10 20:48 YhLu
2005-01-10 20:46 YhLu
2005-01-11 5:36 ` Andi Kleen
2005-01-10 20:37 YhLu
2005-01-10 20:09 YhLu
2005-01-10 20:18 ` Andi Kleen
2005-01-10 19:41 YhLu
2005-01-10 19:43 ` Andi Kleen
2005-01-11 0:42 ` James Cleverdon
2005-01-11 3:28 ` Siddha, Suresh B
2005-01-11 4:42 ` Andi Kleen
2005-01-10 18:48 YhLu
2005-01-10 18:45 ` Andi Kleen
2005-01-08 2:53 YhLu
2005-01-09 23:56 ` James Cleverdon
2005-01-08 2:37 Mikael Pettersson
2005-01-08 15:46 ` Andi Kleen
2005-01-08 1:50 YhLu
2005-01-08 0:50 YhLu
2005-01-08 0:42 ` Andi Kleen
2005-01-08 0:28 YhLu
2005-01-08 0:26 ` James Cleverdon
2005-01-08 0:34 ` Andi Kleen
2005-01-08 0:04 YhLu
2005-01-08 0:12 ` James Cleverdon
2005-01-07 21:44 YhLu
2005-01-07 22:18 ` Andi Kleen
2005-01-07 21:14 YhLu
2005-01-07 21:12 ` Andi Kleen
2005-01-07 19:43 YhLu
2005-01-07 19:40 ` Andi Kleen
2005-01-07 18:27 YhLu
2005-01-07 19:29 ` Andi Kleen
2005-01-07 18:19 YhLu
2005-01-07 19:29 ` Andi Kleen
2005-01-07 2:53 YhLu
2005-01-07 12:24 ` Andi Kleen
2005-01-08 1:30 ` James Cleverdon
2005-01-07 1:06 YhLu
2005-01-07 12:44 ` Andi Kleen
2004-12-30 23:19 YhLu
2004-12-30 23:16 YhLu
2004-12-29 4:43 YhLu
2004-12-30 18:45 ` Andi Kleen
2004-12-30 22:56 ` Matt Domsch
2004-12-30 23:26 ` Andi Kleen
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