Mark Heath, VP Products XenServer, Citrix

Lars Kurth, Xen.org Community Manager, Citrix

Citrix is a cloud

computing

company that

enables mobile

workstyles

Gartner, 2012

m o b i l e w o r k s t y l e s & c l o u d s e r v i c e s

• Efficient resource utilization

• Faster provisioning

• Workload mobility

• Increased uptime

• Enhanced security

Mark Moerdler, Bernstein 2012

• Less Space

• Less Energy

• Reduced Cost

• Even Less Space

• Greener Datacentres

• Even Less Cost

UBS Global Investment Research, August 7, 2012, James F. Hillier.

XenServer

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• GPLv2 with DCO

• Governance similar to Linux Kernel

• Citrix is the steward of Xen.org

• < 30% code developed by Citrix

• > 10M open source users

• Xen powers the largest clouds in production

HW CPUs Memory I/O

VM1

Guest OS

Applications

VM0 (or Dom0)

Dom0 Kernel

Drivers

VM2 VMn

Applications

Guest OS

Applications

Guest OS

Toolstack

Scheduler MMU Timers Interrupts Config

back PV front

• Make optimum use of the ARM SOC

• Supports 32 and 64 bit

• Small code base

• Avoid x86 “baggage”

ARM SOC

GIC

v2 GT

2 stage

MMU

I/O

Device Tree describes …

Template

clash

ARM Architecture Features for Virtualization

Hypervisor mode: EL2

Kernel mode: EL1

User mode: EL0

HVC

ARM Architecture Features for Virtualization ARM SOC

EL2

EL1

EL0

GIC

v2 GT

2 stage

MMU

I/O

Device Tree describes …

Template

clash

HVC

Xen Hypervisor

Dom0

only

Any Xen Guest VM (including Dom0)

Kernel

User Space

• No need for Emulation

• No user space run-time on data path

• One virtualization mode

• Xen is easy to port

Stefano Stabellini, Linux Xen ARM Maintainer,2013

• Fully functional for ARM v7 & v8

• ARM v7: Versatile Express, Arndale & Samsung Chromebook

• ARM v8: Fast Model

• Will be released in Xen 4.3

m o b i l e w o r k s t y l e s & c l o u d s e r v i c e s

m o b i l e w o r k s t y l e s & c l o u d s e r v i c e s

• Good Technology Match

• Platform First

• Creates Opportunities …

– for Citrix

– for the Xen Community

– for the Linaro Community