Date: Mon, 2 Feb 2015 12:34:21 +0100 From: "Schaich, Alonso" <alonsoschaich@fastmail.fm> To: Peter Ross <Peter.Ross@alumni.tu-berlin.de> Cc: freebsd-virtualization@freebsd.org Subject: Re: Virtualbx and CPU counting Message-ID: <20150202123421.cb100c6611d484847102d9c3@fastmail.fm> In-Reply-To: <alpine.BSF.2.00.1502022203340.30916@localhost> References: <alpine.BSF.2.00.1502022203340.30916@localhost>
next in thread | previous in thread | raw e-mail | index | archive | help
--Signature=_Mon__2_Feb_2015_12_34_21_+0100_oZ4uzLjBx0S61amR Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, 2 Feb 2015 22:09:04 +1100 (EST) Peter Ross <Peter.Ross@alumni.tu-berlin.de> wrote: > Hi, >=20 > I have a question: >=20 > I have a server with >=20 > - 2 Xeon E5-2609, > - 4 cores each > - 4 threads per core >=20 > On OS level, Linux and FreeBSD see 8 processors. >=20 > VirtualBox offers 16 CPUs as the maximal number for a VM. >=20 > I expected 32. How does this work? >=20 > Regards > Peter Hi, The Xeon E5-2609 has 1 Thread per core, resulting in 4 Threads per Socket and 8 Threads in a dual-socket setup. If it had Hyperthreading (like the 2620 and "greater" models do), then it would have 2 Threads per core, i.e. 16 on a dual setup with 4 cores per socket. Alonso --Signature=_Mon__2_Feb_2015_12_34_21_+0100_oZ4uzLjBx0S61amR Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQF8BAEBCgBmBQJUz2C+XxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRGRUQ1N0JDOERFQjk5NEQ5QjUyQzBBMzVG RjhGNkI2RDBBQUNGQzY3AAoJEP+Pa20KrPxnUMgH/A1sui1wG1tWHhC+fdgno4wJ v8gupASQMIXGy0wAFnaDI/7suCvINRbHPJ5hPqrVqtl6xWbBMJHBs5TwtBLtiEDp Ez+OG+JYQKIQMc+1vqU5jNiA1CCgww9L7tiPjxng0Kfd8lddUlftkqpQ/6Rphi8C wmOMLR+ajy5UDKm2REfyy7hmzuTdjOjaNE8rAhqeLUcoJfs6Go24kGS+nmtVxoJz qW67P9ivj24MzIvWBigfum9ZcW/Lx+A8J+wSDAPx2iW4Wjvg6VLRkY1wZKbzSzMR COP4htrHKZeQEb64ecZLumVtJA3nSOuSjABYh0ZIiHX5LzXsol+qUnpJF86qzfI= =qonq -----END PGP SIGNATURE----- --Signature=_Mon__2_Feb_2015_12_34_21_+0100_oZ4uzLjBx0S61amR--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20150202123421.cb100c6611d484847102d9c3>