From aragon at phat.za.net  Fri Sep 26 12:13:51 2008
From: aragon at phat.za.net (Aragon Gouveia)
Date: Fri Sep 26 12:13:57 2008
Subject: Figuring out how many real cpus, cpu cores, and logical cpus
Message-ID: <20080926115645.GA97322@phat.za.net>

Hi,

I'm struggling to figure out if my BSD system is detecting the correct
properties about my CPU.

What I've figured out so far is that FreeBSD is seeing 1 physical CPU, with
1 core, and 2 logical CPUs.  However, I am fairly certain this CPU should
have multiple cores (atleast two).

How do I check how many cores a CPU has vs. how many are actually detected? 
I do not have physical access to the machine nor any record of this
system's purchase invoice, so I need to go on what software tells me.

Bootup dmesg is below.


Thanks,
Aragon



Copyright (c) 1992-2008 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 6.3-RELEASE #1: Tue Mar 25 08:57:59 UTC 2008
    root@pavlov.xxxxx:/usr/obj/usr/src/sys/PAVLOV
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Xeon(TM) CPU 3.40GHz (3391.74-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf4a  Stepping = 10
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x649d<SSE3,RSVD2,MON,DS_CPL,EST,CNXT-ID,CX16,xTPR>
  AMD Features=0x20100000<NX,LM>
  AMD Features2=0x1<LAHF>
  Logical CPUs per core: 2
real memory  = 3757834240 (3583 MB)
avail memory = 3682926592 (3512 MB)
ACPI APIC Table: <DELL   PE BKC  >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
ioapic0: Changing APIC ID to 2
ioapic1: Changing APIC ID to 3
ioapic2: Changing APIC ID to 4
ioapic0 <Version 2.0> irqs 0-23 on motherboard
ioapic1 <Version 2.0> irqs 32-55 on motherboard
ioapic2 <Version 2.0> irqs 64-87 on motherboard
acpi0: <DELL PE BKC> on motherboard
acpi0: Power Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0
acpi_hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
Timecounter "HPET" frequency 14318180 Hz quality 900
cpu0: <ACPI CPU> on acpi0
cpu1: <ACPI CPU> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib1: <ACPI PCI-PCI bridge> at device 2.0 on pci0
pci1: <ACPI PCI bus> on pcib1
pcib2: <ACPI PCI-PCI bridge> at device 0.0 on pci1
pci2: <ACPI PCI bus> on pcib2
amr0: <LSILogic MegaRAID 1.53> mem 0xf80f0000-0xf80fffff,0xfe9e0000-0xfe9fffff irq 46 at device 14.0 on pci2
amr0: delete logical drives supported by controller
amr0: <LSILogic PERC 4e/Si> Firmware 521X, BIOS H430, 256MB RAM
pcib3: <ACPI PCI-PCI bridge> at device 0.2 on pci1
pci3: <ACPI PCI bus> on pcib3
pcib4: <ACPI PCI-PCI bridge> at device 4.0 on pci0
pci4: <ACPI PCI bus> on pcib4
pcib5: <ACPI PCI-PCI bridge> at device 5.0 on pci0
pci5: <ACPI PCI bus> on pcib5
pcib6: <ACPI PCI-PCI bridge> at device 0.0 on pci5
pci6: <ACPI PCI bus> on pcib6
em0: <Intel(R) PRO/1000 Network Connection Version - 6.7.2> port 0xecc0-0xecff mem 0xfe6e0000-0xfe6fffff irq 64 at device 7.0 on pci6
em0: Ethernet address: 00:13:72:5a:cd:6a
pcib7: <ACPI PCI-PCI bridge> at device 0.2 on pci5
pci7: <ACPI PCI bus> on pcib7
em1: <Intel(R) PRO/1000 Network Connection Version - 6.7.2> port 0xdcc0-0xdcff mem 0xfe4e0000-0xfe4fffff irq 65 at device 8.0 on pci7
em1: Ethernet address: 00:13:72:5a:cd:6b
pcib8: <ACPI PCI-PCI bridge> at device 6.0 on pci0
pci8: <ACPI PCI bus> on pcib8
pci0: <serial bus, USB> at device 29.0 (no driver attached)
pci0: <serial bus, USB> at device 29.1 (no driver attached)
pci0: <serial bus, USB> at device 29.2 (no driver attached)
pci0: <serial bus, USB> at device 29.7 (no driver attached)
pcib9: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci9: <ACPI PCI bus> on pcib9
pci9: <display, VGA> at device 13.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH5 UDMA100 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xfc00-0xfc0f at device 31.1 on pci0
ata0: <ATA channel 0> on atapci0
ata1: <ATA channel 1> on atapci0
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
sio0: type 16550A
orm0: <ISA Option ROMs> at iomem 0xc0000-0xcafff,0xcb000-0xcbfff,0xcc000-0xccfff,0xec000-0xeffff on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
atkbd0: [GIANT-LOCKED]
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounters tick every 10.000 msec
acd0: CDROM <TEAC CD-ROM CD-224E-N/3.AB> at ata0-master UDMA33
amr0: delete logical drives supported by controller
amrd0: <LSILogic MegaRAID logical drive> on amr0
amrd0: 69880MB (143114240 sectors) RAID 1 (optimal)
SMP: AP CPU #1 Launched!
From jhb at freebsd.org  Fri Sep 26 14:05:11 2008
From: jhb at freebsd.org (John Baldwin)
Date: Fri Sep 26 14:05:20 2008
Subject: Figuring out how many real cpus, cpu cores, and logical cpus
In-Reply-To: <20080926115645.GA97322@phat.za.net>
References: <20080926115645.GA97322@phat.za.net>
Message-ID: <200809260957.04628.jhb@freebsd.org>

On Friday 26 September 2008 07:56:45 am Aragon Gouveia wrote:
> Hi,
> 
> I'm struggling to figure out if my BSD system is detecting the correct
> properties about my CPU.
> 
> What I've figured out so far is that FreeBSD is seeing 1 physical CPU, with
> 1 core, and 2 logical CPUs.  However, I am fairly certain this CPU should
> have multiple cores (atleast two).

Are you sure this isn't a Xeon processor with 2 hyperthreads?  amr(4) is a 
PERC4 RAID controller, and the dual-core Dell boxes I know of all have 
PERC5/6 (mfi) RAID controllers.

-- 
John Baldwin
From ivoras at freebsd.org  Fri Sep 26 14:06:02 2008
From: ivoras at freebsd.org (Ivan Voras)
Date: Fri Sep 26 14:06:10 2008
Subject: Figuring out how many real cpus, cpu cores, and logical cpus
In-Reply-To: <20080926115645.GA97322@phat.za.net>
References: <20080926115645.GA97322@phat.za.net>
Message-ID: <gbikgq$u09$1@ger.gmane.org>

Aragon Gouveia wrote:
> Hi,
> 
> I'm struggling to figure out if my BSD system is detecting the correct
> properties about my CPU.
> 
> What I've figured out so far is that FreeBSD is seeing 1 physical CPU, with
> 1 core, and 2 logical CPUs.  However, I am fairly certain this CPU should
> have multiple cores (atleast two).
> 
> How do I check how many cores a CPU has vs. how many are actually detected? 
> I do not have physical access to the machine nor any record of this
> system's purchase invoice, so I need to go on what software tells me.
> 
> Bootup dmesg is below.

>   Origin = "GenuineIntel"  Id = 0xf4a  Stepping = 10
>   Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
>   Features2=0x649d<SSE3,RSVD2,MON,DS_CPL,EST,CNXT-ID,CX16,xTPR>
>   AMD Features=0x20100000<NX,LM>
>   AMD Features2=0x1<LAHF>
>   Logical CPUs per core: 2
> real memory  = 3757834240 (3583 MB)
> avail memory = 3682926592 (3512 MB)
> ACPI APIC Table: <DELL   PE BKC  >
> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
>  cpu0 (BSP): APIC ID:  0
>  cpu1 (AP): APIC ID:  1

This is most likely a hyperthreaded CPU from an older NetBurst (pentium
4-style) Xeon generation, so the displayed information is correct: you
have one socket, with single core CPU in it, which supports
hyperthreading so it presents itself as two CPUs. You probably also need
to enable machdep.hyperthreading_allowed sysctl (if you have it).

If you still doubt it, you can send the model number or look it up
yourself in
http://en.wikipedia.org/wiki/List_of_Intel_Xeon_microprocessors .

sysutils/dmidecode utility could also help you.

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From aragon at phat.za.net  Fri Sep 26 21:42:33 2008
From: aragon at phat.za.net (Aragon Gouveia)
Date: Fri Sep 26 21:42:40 2008
Subject: Figuring out how many real cpus, cpu cores, and logical cpus
In-Reply-To: <200809260957.04628.jhb@freebsd.org>
References: <20080926115645.GA97322@phat.za.net>
	<200809260957.04628.jhb@freebsd.org>
Message-ID: <20080926214231.GA38518@phat.za.net>

| By John Baldwin <jhb@freebsd.org>
|                                          [ 2008-09-26 16:05 +0200 ]
> On Friday 26 September 2008 07:56:45 am Aragon Gouveia wrote:
> > Hi,
> > 
> > I'm struggling to figure out if my BSD system is detecting the correct
> > properties about my CPU.
> > 
> > What I've figured out so far is that FreeBSD is seeing 1 physical CPU, with
> > 1 core, and 2 logical CPUs.  However, I am fairly certain this CPU should
> > have multiple cores (atleast two).
> 
> Are you sure this isn't a Xeon processor with 2 hyperthreads?  amr(4) is a 
> PERC4 RAID controller, and the dual-core Dell boxes I know of all have 
> PERC5/6 (mfi) RAID controllers.

I installed dmidecode from ports which was very useful.  It showed only 1
core per chip and got me the Dell service tag for the machine, which I
looked up online to check further.  Your suspicions confirm everything too,
and seems I was wrong - only 1 core per chip. :)

Thanks for responding!


Regards,
Aragon