Date: Fri, 23 May 2014 20:07:03 -0600 From: Alan Somers <asomers@freebsd.org> To: Tim Bishop <tim-lists@bishnet.net> Cc: FreeBSD CURRENT <freebsd-current@freebsd.org> Subject: Re: Processor cores not properly detected/activated? Message-ID: <CAOtMX2gyeLYs4nAKOa-u=PQ63TakreG0CW_Fc%2BRrdDv8NtZ3XQ@mail.gmail.com> In-Reply-To: <20140524014713.GF13462@carrick-users.bishnet.net> References: <20140524014713.GF13462@carrick-users.bishnet.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, May 23, 2014 at 7:47 PM, Tim Bishop <tim-lists@bishnet.net> wrote:
> I have a new quad CPU system containing four of these processors:
>
> Intel(R) Xeon(R) CPU E7-4830 v2 @ 2.20GHz (2200.05-MHz K8-class CPU)
>
> I've tried FreeBSD 10.0, stable/10 and head, but all of them only detect
> a maximum of 64 "CPUs". There should be 80. Here's the relevant dmesg
> output (full output attached):
>
> FreeBSD/SMP: Multiprocessor System Detected: 64 CPUs
> FreeBSD/SMP: 3 package(s) x 10 core(s) x 2 SMT threads
> cpu0 (BSP): APIC ID: 0
> cpu1 (AP): APIC ID: 1
> ...
> cpu62 (AP): APIC ID: 98
> cpu63 (AP): APIC ID: 99
> cpu (AP): APIC ID: 100 (disabled)
> cpu (AP): APIC ID: 101 (disabled)
> cpu (AP): APIC ID: 102 (disabled)
> cpu (AP): APIC ID: 103 (disabled)
> cpu (AP): APIC ID: 104 (disabled)
> cpu (AP): APIC ID: 105 (disabled)
> cpu (AP): APIC ID: 112 (disabled)
> cpu (AP): APIC ID: 113 (disabled)
> cpu (AP): APIC ID: 114 (disabled)
> cpu (AP): APIC ID: 115 (disabled)
> cpu (AP): APIC ID: 116 (disabled)
> cpu (AP): APIC ID: 117 (disabled)
> cpu (AP): APIC ID: 118 (disabled)
> cpu (AP): APIC ID: 119 (disabled)
> cpu (AP): APIC ID: 120 (disabled)
> cpu (AP): APIC ID: 121 (disabled)
>
> Firstly, it should say 4 packages, so I'm not sure why its only has 3.
> But then it goes on to detect all the "CPUs", but doesn't enable the
> last 16.
>
> acpidump shows all the "CPUs" as enabled (trimmed output):
>
> APIC: Length=1090, Revision=1, Checksum=115,
> OEMID=DELL, OEM Table ID=PE_SC3, OEM Revision=0x1,
> Creator ID=DELL, Creator Revision=0x1
> Local APIC ADDR=0xfee00000
> Flags={PC-AT}
>
> Type=Local APIC
> ACPI CPU=1
> Flags={ENABLED}
> APIC ID=0
>
> Type=Local APIC
> ACPI CPU=2
> Flags={ENABLED}
> APIC ID=32
>
> ...
>
> Type=Local APIC
> ACPI CPU=79
> Flags={ENABLED}
> APIC ID=89
>
> Type=Local APIC
> ACPI CPU=80
> Flags={ENABLED}
> APIC ID=121
>
> Finally, I've booted Ubuntu 14.04 (Linux 3.13) and it correctly detects
> all 80 "CPUs".
>
> Can anyone shed any light on what's happening?
>
> I'm running head at the moment and I'm happy to fiddle around as much as
> required to debug it.
>
> Thanks,
>
> Tim.
>
> --
> Tim Bishop
> http://www.bishnet.net/tim/
> PGP Key: 0x6C226B37FDF38D55
>
Try setting MAXCPU higher. It's defined by default to 64 in,
sys/amd64/include/param.h
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAOtMX2gyeLYs4nAKOa-u=PQ63TakreG0CW_Fc%2BRrdDv8NtZ3XQ>