From: Andi Kleen <andi@firstfloor.org>
To: tfjellstrom@shaw.ca
Cc: kvm@vger.kernel.org
Subject: Re: Virtualization Performance: Intel vs. AMD
Date: Mon, 16 Nov 2009 13:02:23 +0100 [thread overview]
Message-ID: <877htq65kg.fsf@basil.nowhere.org> (raw)
In-Reply-To: <200911151603.40453.tfjellstrom@shaw.ca> (Thomas Fjellstrom's message of "Sun, 15 Nov 2009 16:03:40 -0700")
Thomas Fjellstrom <tfjellstrom@shaw.ca> writes:
> Hardware context switches aren't free either.
FWIW, SMT has no "hardware context switches", the 'S' stands for
simultaneous: the operations from the different threads are travelling
simultaneously through the CPU's pipeline.
You seem to confuse it with 'CMT' (Coarse-grained Multi Threading),
which has context switches.
-Andi
next prev parent reply other threads:[~2009-11-16 12:02 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-15 12:22 Virtualization Performance: Intel vs. AMD Andreas Winkelbauer
2009-11-15 13:05 ` Neil Aggarwal
2009-11-15 15:55 ` Thomas Treutner
2009-11-16 10:12 ` Avi Kivity
2009-11-17 10:23 ` Thomas Treutner
2009-11-15 15:56 ` Thomas Treutner
2009-11-15 17:33 ` Neil Aggarwal
2009-11-15 17:54 ` Thomas Fjellstrom
2009-11-15 17:59 ` Neil Aggarwal
2009-11-15 22:29 ` Gordan Bobic
2009-11-15 23:03 ` Thomas Fjellstrom
2009-11-15 23:50 ` Gordan Bobic
2009-11-16 12:02 ` Andi Kleen [this message]
2009-11-16 12:10 ` Avi Kivity
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