Bristol Digest, Vol 585, Issue 6

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Today's Topics:

1. Re: Processors (David Fear)
2. Re: Processors (Martin Moore)
3. Re: Processors (Alex Butcher)
4. Re: Processors (Shane McEwan)


----------------------------------------------------------------------

Message: 1
Date: Thu, 15 Jan 2015 22:48:06 +0000
From: David Fear <david@dfear.co.uk>
To: martinm@it-helps.co.uk, Bristol and Bath Linux User Group
<bristol@mailman.lug.org.uk>
Subject: Re: [bristol] Processors
Message-ID: <54B843A6.3080605@dfear.co.uk>
Content-Type: text/plain; charset=windows-1252; format=flowed

On 15/01/15 20:53, Martin Moore wrote:
> I?m speccing some new servers and checking the existing ones they report
> 8 Xeon processors.
>
> As far as I can find out, Xeon?s have up to 4 cores ? am I right in
> thinking they have 2 physical 4 core processors?
>
> Ta.
>
>
>
> _______________________________________________
> Bristol mailing list
> Bristol@mailman.lug.org.uk
> https://mailman.lug.org.uk/mailman/listinfo/bristol
>
Hi

They could either have 2 physical 4 core Xeons or 1x 4 core Xeon with
hyperthreading.

--
Regards

-----------------------------------
Dave Fear :: david@dfear.co.uk

Order your free giffgaff SIM card through my page and get 5 pounds free
credit http://t.co/z1KJF5y



------------------------------

Message: 2
Date: Fri, 16 Jan 2015 09:16:30 -0000
From: "Martin Moore" <martinm@it-helps.co.uk>
To: "'Bristol and Bath Linux User Group'" <bristol@mailman.lug.org.uk>
Subject: Re: [bristol] Processors
Message-ID: <04cf01d0316d$1f7f5820$5e7e0860$@co.uk>
Content-Type: text/plain; charset="utf-8"

OK, that returns 4, so I guess that points to 2 devices.

But threads per core = 2 and sockets =1

So are we at 1 device with 4 cores and hyperthreading? The model is E31240 which appears to support that!

Cheers all.


lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 8
On-line CPU(s) list: 0-7
Thread(s) per core: 2
Core(s) per socket: 4
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 42
Stepping: 7
CPU MHz: 1600.000
BogoMIPS: 6584.99
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 8192K

-----Original Message-----
From: bristol-bounces@mailman.lug.org.uk [mailto:bristol-bounces@mailman.lug.org.uk] On Behalf Of D J Stewart
Sent: 15 January 2015 21:23
To: Bristol and Bath Linux User Group
Subject: Re: [bristol] Processors

On Thu, 15 Jan 2015, Martin Moore wrote:

> As far as I can find out, Xeon?s have up to 4 cores ? am I right in
> thinking they have 2 physical 4 core processors?

What does /proc/cpuinfo say? You are interested mostly in the "cpu cores"
and "core id" fields.

--
Dave Stewart




------------------------------

Message: 3
Date: Fri, 16 Jan 2015 11:13:15 +0000 (GMT)
From: Alex Butcher <lug@assursys.co.uk>
To: martinm@it-helps.co.uk, Bristol and Bath Linux User Group
<bristol@mailman.lug.org.uk>
Subject: Re: [bristol] Processors
Message-ID:
<alpine.LFD.2.11.1501161110550.12605@sbhezbfg.of5.nffheflf.cev>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

On Thu, 15 Jan 2015, Martin Moore wrote:

> As far as I can find out, Xeon?s have up to 4 cores ? am I right in thinking
> they have 2 physical 4 core processors?

Current state of the art is that some Xeon parts have 18 physical cores,
which show up as 36 threads, e.g. <http://ark.intel.com/products/81061>

Get your chequebook out, as they're over ?3K each!

Best Regards,
Alex

------------------------------

Message: 4
Date: Fri, 16 Jan 2015 11:33:57 +0000
From: Shane McEwan <shane@mcewan.id.au>
To: bristol@mailman.lug.org.uk
Subject: Re: [bristol] Processors
Message-ID: <54B8F725.6080900@mcewan.id.au>
Content-Type: text/plain; charset=utf-8

On 15/01/15 20:53, Martin Moore wrote:
> I?m speccing some new servers and checking the existing ones they report
> 8 Xeon processors.
>
>
>
> As far as I can find out, Xeon?s have up to 4 cores ? am I right in
> thinking they have 2 physical 4 core processors?

Xeons can have more than 4 cores. I think 12 is the current limit? Big
bikkies! The latest HP Proliant servers I have are dual-hex-core with
hyperthreading: 2 sockets, 6 cores per socket, 2 threads per core giving
a total of 24 "CPUs".

Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 24
On-line CPU(s) list: 0-23
Thread(s) per core: 2
Core(s) per socket: 6
Socket(s): 2
NUMA node(s): 2
Vendor ID: GenuineIntel
CPU family: 6
Model: 62
Stepping: 4
CPU MHz: 1200.000
BogoMIPS: 5189.17
Virtualisation: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 15360K
NUMA node0 CPU(s): 0-5,12-17
NUMA node1 CPU(s): 6-11,18-23

Shane.



------------------------------

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End of Bristol Digest, Vol 585, Issue 6
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