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Thursday, October 24
 

9:00am

Welcome & Community Roundup - Lars Kurth, Citrix
Speakers
avatar for Lars Kurth

Lars Kurth

Director, Xen Project / Citrix
Lars Kurth had his first contact with the open source community in 1997 when he worked on various parts of the ARM toolchain. This experience led Lars to become a passionate open source enthusiast who worked with and for many open source communities over the past 19 years. Lars contributed to projects such as GCC, Eclipse, Symbian and Xen and became the open source community manager for Xen.org in 2011 and later chairman of the Xen Project... Read More →


Thursday October 24, 2013 9:00am - 9:15am
Moorfoot Hall Edinburgh International Conference Centre

9:00am

Hack and Meeting Space
Thursday October 24, 2013 9:00am - 12:30pm
Kilsyth Hall Edinburgh International Conference Centre

9:15am

Xen Project Development Update - George Dunlap, Citrix
Includes other development updates, aka NUMA, FreeBSD, Xen and Libvirt.

Xen 4.3 was the first release with our new "release coordinator" role during the whole development cycle. This talk will review some ways in which the process worked well for 4.3, and some ways it could have been better, and then go on to talk about the 4.4 release. 

Speakers
avatar for George Dunlap

George Dunlap

Staff Software Engineer, Citrix
George Dunlap worked with the Xen project while a graduate student at the University of Michigan before receiving his PhD in 2006. He is currently working as Staff Software Engineer for Citrix on the open-source Xen team in Cambridge, England. He has done work in many areas of Xen, including performance analysis, scheduling, and memory management. He writes technical articles regularly for the xenproject.org blog, including one describing in... Read More →


Thursday October 24, 2013 9:15am - 10:30am
Moorfoot Hall Edinburgh International Conference Centre

10:30am

Break
Thursday October 24, 2013 10:30am - 11:00am
Moorfoot Hall Edinburgh International Conference Centre

11:00am

HVM Dom0: Any unmodified OS as Dom0 - Will Auld, Intel
It should be great if we can use an unmodified guest for dom0 or the driver domain. We found a way to achieve that. Since Xen's inception, the first guest on Xen is always a para-virtualized domain, and it can be modified Linux, NetBSD, and Solaris etc. In this way, dom0 can achieve near-native performance, so it is commonly used in the server market. However, modifications to guest kernels also implies limitations. For example, it can't support Windows OS as the dom0 or the driver domain. With the rapid evolution of hardware-assisted virtualization (e.g. VMX, VT-d technologies), HVM domains also can achieve comparable performance with para-virtualization. And, it's high time for Xen to such an unmodified guest as the dom0. In the presentation, we discuss its architectural changes and its benefits compared with the traditional PV or HVM dom0, and we also introduce what we have done.

Speakers
WA

Will Auld

Performance Architect, Principal Engineer, Intel


Thursday October 24, 2013 11:00am - 11:30am
Moorfoot Hall Edinburgh International Conference Centre

11:30am

"Unlimited" Event Channels - David Vrabel, Citrix
Event Channels are Xen's mechanism for paravirtualized interrupts. These were limited to only 4096 which then limits the number of guests that a host may support to around 300 to 500. This presentation will give a brief introduction to event channels, a detailed look at the new, innovative FIFO-based event channel ABI that increases the limit to over 100,000 as well as having several other useful features (e.g., multiple priorties). Some of the key performance measurments of the new ABI will be shown.

Speakers
DV

David Vrabel

Citrix
David Vrabel is a member of the XenServer Engineering team at Citrix and spends most of his time on Linux kernel and Xen development. He is also a co-maintainer for the Xen (x86) subsystem in the Linux kernel.


Thursday October 24, 2013 11:30am - 12:00am
Moorfoot Hall Edinburgh International Conference Centre

12:00pm

On Paravirualizing TCP: Congestion Control on Xen VMs - Luwei Cheng, Student, University of Hong Kong
While datacenters are increasingly adopting VMs to provide elastic cloud services, they still rely on traditional TCP for congestion control. In this talk, I will first show that VM scheduling delays can heavily contaminate RTTs sensed by VM senders, preventing TCP from correctly learning the physical network condition. Focusing on the incast problem, which is commonly seen in large-scale distributed data processing such as MapReduce and web search, I find that the solutions that have been developed for *physical* clusters fall short in a Xen *virtual* cluster. Second, I will provide a concrete understanding of the problem, and reveal that the situations that when the sending VM is preempted versus when the receiving VM is preempted, are different. Third, I will introduce my recent attempts on paravirtualizing TCP to overcome the negative effect caused by VM scheduling delays.

Speakers
LC

Luwei Cheng

PhD student, Department of Computer Science, The University of Hong Kong
I am a 2nd-year PhD student, in Department of Computer Science, the University of Hong Kong. My research interest is mainly about virtualization technologies for cloud computing, including but not limited to VM scheduling, I/O models, and guest OS design. I have been using/researching Xen since 2009 and have published several papers about Xen’s I/O performance in reputable conferences. I have the speaking experience in several international... Read More →


Thursday October 24, 2013 12:00pm - 12:30pm
Moorfoot Hall Edinburgh International Conference Centre

12:30pm

Lunch
Thursday October 24, 2013 12:30pm - 1:45pm
Kilsyth Hall Edinburgh International Conference Centre

1:45pm

BoF Announcements
Thursday October 24, 2013 1:45pm - 2:00pm
Moorfoot Hall Edinburgh International Conference Centre

2:00pm

Test-as-a-Service and XenRT - Alex Brett, Citrix
In this presentation, Alex Brett will show how Citrix has constructed a Test-as-a-Service environment which is used by the wider XenServer engineering team, highlighting the benefits the approach provides, together with an introduction to the (recently open sourced) XenRT automation framework which powers it, and discuss how this could be applied within the Xen Project community.

Speakers
AB

Alex Brett

Citrix
Alex Brett is a Staff Software Engineer in the XenServer QA team at Citrix Systems, working on the XenRT test automation framework.


Thursday October 24, 2013 2:00pm - 2:30pm
Moorfoot Hall Edinburgh International Conference Centre

2:00pm

BoF: GlusterFS Integration: libgfapi and the block device translator, John Mark Walker, RedHat
Running through the QEMU/KVM integration with libgfapi and the block device translator to see if there are any potential parallels to Xen hypervisor integration

Speakers
avatar for John Mark Walker

John Mark Walker

Open Source Ecosystems Leader, Red Hat, Inc
John Mark is the ManageIQ Community Leader. For three years prior to his ManageIQ role, he was the Gluster Community Leader and is a long-time Open Source community advocate and strategist.


Thursday October 24, 2013 2:00pm - 2:45pm
Kilsyth Hall Edinburgh International Conference Centre

2:30pm

"osstest" Xen testing system - Ian Jackson, Citrix
osstest is the system which does the Xen.org automatic tests of Xen. The push gates, which try to prevent important regressions from reaching the main stable and evelopment trees, are managed by osstest.

In this talk I will give a brief overview of the system, focussed on how to add new tests.

Speakers
IJ

Ian Jackson

Citrix
Ian Jackson is a long time free software author, Xen and Debian developer. Jackson is Xen committer and wrote dpkg (replacing a more primitive Perl tool with the same name), SAUCE (Software Against Unsolicited Commercial Email), userv and debbugs. He used to maintain the Linux FAQ.


Thursday October 24, 2013 2:30pm - 2:45pm
Moorfoot Hall Edinburgh International Conference Centre

2:45pm

Zero-copy display of guest framebuffers using GEM - John Baboval, Citrix
The current state-of-the-art in displaying guest video is to copy pixel data from domU memory into a buffer in the device model domain, and then to render the display using something like X, or VNC. The quantity of data copied is partially mitigated by dirty page tracking. However when using the VM to play video or other other tasks that require frequent full-screen updates, copying is a significant drag on system performance and power consumption. By using the DRM subsystem in dom0 on systems with a unified memory architecture, it is possible to make arbitrary pages available for direct scanout by the graphics hardware. The in-kernel graphics drivers make this relatively straight forward and maintainable. This presentation explains how the current display path works, and how to use DRM to improve it.

Speakers
JB

John Baboval

Citrix
John Baboval is Principal Software Engineer at Citrix. John is working on XenClient and has worked on Graphics Virtualization, Power Management and Paravirtualized devices and drivers. John is also the maintainer of QEMU based device models for XenClient.


Thursday October 24, 2013 2:45pm - 3:15pm
Moorfoot Hall Edinburgh International Conference Centre

2:45pm

BoF: "osstest" coding sessions - Ian Jackson, Citrix
Hands-on osstest coding session

Speakers
IJ

Ian Jackson

Citrix
Ian Jackson is a long time free software author, Xen and Debian developer. Jackson is Xen committer and wrote dpkg (replacing a more primitive Perl tool with the same name), SAUCE (Software Against Unsolicited Commercial Email), userv and debbugs. He used to maintain the Linux FAQ.


Thursday October 24, 2013 2:45pm - 3:45pm
Kilsyth Hall Edinburgh International Conference Centre

3:15pm

Virtual Disk Integrity in Real Time - JP Blake, Assured Information Security & Chris Rogers, Student at SUNY Binghamton
This paper introduces the Virtual Disk Integrity in Real Time (vDIRT) monitor, a mechanism to measure virtual hard disks in real time from the Dom0 trusted computing base. vDIRT is an improvement over traditional methods for auditing file integrity which rely on a service in a potentially compromised host. It also overcomes the limitations of existing methods for assuring disk integrity that are coarse grained and do not scale to large disks. vDIRT is a capability to measure disk reads and writes in real time, allowing for fine grained tracking of sectors within files, as well as the overall disk. The vDIRT implementation and its impact on performance is discussed to show that disk operation monitoring from Dom0 is practical.

Speakers
JB

JP Blake

Assured Information Security
JP Blake is a researcher at Assured Information Security in Rome, NY. His work focuses on trusted computing, Xen, and XenClient XT. | | Chris Rogers is a masters student at SUNY Binghamton.
CR

Chris Rogers

Chris Rogers is a masters student at SUNY Binghamton.


Thursday October 24, 2013 3:15pm - 3:45pm
Moorfoot Hall Edinburgh International Conference Centre

3:45pm

Break
Thursday October 24, 2013 3:45pm - 4:15pm
Moorfoot Hall Edinburgh International Conference Centre

4:15pm

PVH Technical Deep Dive, George Dunlap, Citrix
PVH is a new guest type that is designed to take the best features of both PV and HVM guests. This talk will be a technical deep-dive: explaining exactly which features of HVM and PV guests are used, and which ones are discarded, and why. The primary goal will be to inform developers about the details of PVH to make it easier for them to interact with the code.

Speakers
avatar for George Dunlap

George Dunlap

Staff Software Engineer, Citrix
George Dunlap worked with the Xen project while a graduate student at the University of Michigan before receiving his PhD in 2006. He is currently working as Staff Software Engineer for Citrix on the open-source Xen team in Cambridge, England. He has done work in many areas of Xen, including performance analysis, scheduling, and memory management. He writes technical articles regularly for the xenproject.org blog, including one describing in... Read More →


Thursday October 24, 2013 4:15pm - 4:45pm
Moorfoot Hall Edinburgh International Conference Centre

4:15pm

BoF Slot 3
Thursday October 24, 2013 4:15pm - 5:00pm
Kilsyth Hall Edinburgh International Conference Centre

4:45pm

Gnome outreach: Destination Xen - Elena Ufimtseva
In this talk I plan to describe my first impression from working on
open source project, how the community is organized and what can be gained by contributing to open source community. As a supporting fact of positive outcome from participating in similar projects, I will provide an example from my personal experience. It demonstrates how anyone can dive into open source development and work on project of choice. I introduce my work on virtual NUMA within XenProject and OPW program. It will demonstrate the challenges that newbie will face diving into mature development product and process, the necessity of discipline, commitment and self-organization. I will show what I had to learn in order to move forward, what I had to focus on and how to progress. The work what was done at this moment would not be possible without help of project mentors, source code knowledge, learning how to extract information from patches and ask right questions. I hope this example will bring more passionate developers into the community of open source software and hacking.

Speakers
avatar for Elena Ufimtseva

Elena Ufimtseva

Software Engineer, Oracle
I am a former OPW intern of 2013 program and my project was vNUMA work for Xen hypervisor.  After OPW I realized that I like to continue to contribute to Xen Project and Linux kernel. I had given a talk at 2013 LinuxCon in Europe and at Xen Project summit of the same year about my experience as OPW intern, as open source project contributor and what I have learned and what skills I got during that time.  Currently I work at Oracle on... Read More →


Thursday October 24, 2013 4:45pm - 5:00pm
Moorfoot Hall Edinburgh International Conference Centre

5:00pm

Increasing XenServer's VM density, Jonathan Davies, Citrix
As the number of CPU cores in server-class hardware increases, the demand on a virtualisation platform increases for greater VM density. Most commercial virtualisation platforms now support several hundred VMs per host. This talk will describe the scalability challenges that were overcome in Citrix XenServer 6.2 to enable support for up to 500 fully virtualised or 650 paravirtualised VMs per host. These include limits with event channels, blktap, xenstored and consoled. It will also discuss how dom0 CPU utilisation was reduced in order to make a large number of VMs responsive and thus usable, and will present benchmark measurements quantifying these improvements.

Speakers
JD

Jonathan Davies

Citrix
Jonathan is the System Performance Lead for XenServer at Citrix. His responsibilities include optimisation of performance and scalability. Has presented at international academic conferences.


Thursday October 24, 2013 5:00pm - 5:30pm
Moorfoot Hall Edinburgh International Conference Centre

5:00pm

BoF: PV Audio on Xen, Stefano Panella, Citrix
Developing a good PV audio solution for Xen is not as simple as it seems. On Xen the audio data bandwidth is not a problem, but the synchronization and the Real Time nature of a real audio card is difficult to workaround. Stefano Panella would like to share some lessons learned developing a PV Audio solution compatible with linux and windows guests, showing the differences in the required guest API (alsa driver for linux, WaveCyclic and WaveRT drivers for Windows). Using a PV audio solution it would be possible to have Acoustic Echo Cancellation working, difficult to achieve with a pure audio emulation. Stefano would also like to discuss about what would be needed to upstream a PV Audio solution, which would involve changes in Xen, qemu and linux.

Speakers
SP

Stefano Panella

Stefano Panella comes from an embedded programming background and has previously worked on wireless technologies and graphic remoting. He is currently working for Citrix in the XenClient team and he is leading the development in the audio subsystem on Xen. Stefano has also done some work in the linux qemu stubdomain area to improve security in XenClient and that work has highlighted the need for a general PV audio solution.


Thursday October 24, 2013 5:00pm - 6:00pm
Kilsyth Hall Edinburgh International Conference Centre

5:30pm

Open Source Citrix Windows PV Drivers - Paul Durrant, Citrix
Citrix has recently spent several months making sure all the key parts of XenServer are open source. Part of this effort made the XenServer Windows Paravirtual (PV) drivers available in source form under a BSD 2 clause license on GitHub.

Building these drivers outside of the internal Citrix XenServer build environment was quite hard and the resulting binaries would only run correctly in a XenServer host environment.
I have recently spent many weeks modifying the drivers so that they should work on any recent upstream Xen host environment thus making it much easier for anyone outside of Citrix to build and deploy the drivers. I would therefore like to give a brief tour of all the drivers, their source, what each of them does, and how they all interact. I will also discuss plans for posting signed versions of these drivers onto Windows Update for general use by the community.

Speakers
avatar for Paul Durrant

Paul Durrant

Senior Principal Software Engineer, Citrix Systems Inc
My name is Paul Durrant. I am a Senior Principal Software Engineer in the XenServer platform group of Citrix Systems UK, based in Cambridge. My chief responsibilities are Windows Paravirtual drivers, Virtual GPU subsystem, and the guest storage and network data-paths. My work has given me broad experience of Xen (hypervisor, tools and firmware), PV protocols and QEMU. I have been a kernel level programmer since I graduated from the University... Read More →


Thursday October 24, 2013 5:30pm - 6:00pm
Moorfoot Hall Edinburgh International Conference Centre

6:30pm

Evening Reception
Join fellow attendees for dinner and drinks at Hyde Out. This is a great opportunity to relax, network with fellow attendees, continue conversations outside of the conference center, and see a bit of the local area!

Thursday October 24, 2013 6:30pm - 9:30pm
Hyde Out
 
Friday, October 25
 

9:00am

Xen on ARM Update - Stefano Stabellini, Citrix
Many significant improvements have been made to Xen and Linux for the ARM architecture since September 2012, when initial support for Xen on ARM was introduced in the kernel. The number of contributors considerably increased as the number of different companies behind them. Xen on ARM has become a true multivendor project. Today Linux 3.11 can run on Xen on ARM as a DomU or Dom0, 32-bit or 64-bit, with one or more CPUs. Xen 4.3, out since July 2013, is the first hypervisor release to support ARMv7 and ARMv8 platforms. This talk will discuss the current status of the project, the principal technical advancements achieved during the last year of development and the problems still left unsolved. It will relate the experience of porting Xen to many new ARM SoCs and working with multiple hardware vendors in the ARM ecosystem, within and outside the Linaro Enterprise working Group.

Speakers
SS

Stefano Stabellini

Senior Principal Software Engineer, Citrix
Stefano Stabellini is a Senior Principal Software Engineer at Citrix, working on the Open Source Xen Platform team. He has been working on Xen since 2007, focusing on several different projects, spanning from Qemu to Xen and the Linux kernel. He co-created libxenlight in November 2009 and two years later started with Ian Campbell the Xen port to ARMv7 with virtualization extensions. He currently maintains Xen support in Qemu, libxenlight, and Xen... Read More →


Friday October 25, 2013 9:00am - 9:30am
Moorfoot Hall Edinburgh International Conference Centre

9:30am

Status Update of COLO Project - Xiaowei Yang, Huawei and Will Auld, Intel
We have presented the idea of coarse grain lock-stepping (COLO) virtual machiens for non-stop service in last year's xen summit. We have made significant progress in the past year and submitted the patch series to the community. It is a good time for us to present the latest status to the community and call for participation.

Speakers
WA

Will Auld

Performance Architect, Principal Engineer, Intel
XY

Xiaowei Yang

Xiaowei Yang, Huawei. Xiaowei is an architect of Huawei Virtualzation Platform. He is responsible for the technical development of virutalization projects.


Friday October 25, 2013 9:30am - 10:00am
Kilsyth Hall Edinburgh International Conference Centre

9:30am

Dual-Android on Nexus 10, Lovene Bhatia, Samsung
Samsung will present the challenges of creating a dual-Android platform on the Nexus 10 using Xen on ARM. Running two copies of Android is a strong use-case to satisfy the security needs for BYOD (Bring Your Own Device), where one Android can be designated as “work” and is secure and isolated from the users “home” Android. Achieving a good user-experience in both Android is essential for this technology to succeed commercially. The Nexus 10 has ARM Cortex A15 processors. For a good user-experience, both Android need high-performance GPU-accelerated graphics which demand high throughput and low latency. Samsung will discuss the issues encountered using Xen on a mobile device in this demanding use-case, and how the changes for Xen for mobile can be contributed into the community.

Speakers
LB

Lovene Bhatia

Samsung
I am working for Samsung Electronics in Samsung Research UK (SRUK). Samsung has been working on Xen on ARM for many years, leading the Xen A9 project. SRUK is researching using Xen on mobile devices on ARM A15 processors.


Friday October 25, 2013 9:30am - 10:00am
Moorfoot Hall Edinburgh International Conference Centre

10:00am

Xen in OSS based In–Vehicle Infotainment Systems, Artem Mygaiev, GlobalLogic
Xen role, details of implementation and problems in a sample solution based on OSS (Android, Linux and Xen) that addresses Automotive requirements such as ultra-fast RVC boot time, quick IVI system boot time, cloud connectivity and multimedia capabilities, reliability and security through hardware virtualization. Secure CAN/LIN/MOST bus integration handled by Linux on Dom0 while Android runs customizable QML-based HMI in a sandbox of DomU. These case studies will include but not be limited to: computing power requirements, memory requirements, virtualization, stability, boot-time sequence and optimization, video clips showing results of the work done. Case study is built on TexasInstruments OMAP5 SoC.

Speakers
AM

Artem Mygaiev

GlobalLogic
Mr. Mygaiev is holding the position of Associate VP in GlobalLogic Inc. and responsible for Embedded Software domain in Ukrainian branch of GlobalLogic. He has accumulated over eleven years of hardware engineering and embedded software development experience in wired and wireless telecommunications & networking, multimedia systems and mobile devices. Mr. Mygaiev received both MSEE and BSEE from the Odessa National Polytechnic University in... Read More →


Friday October 25, 2013 10:00am - 10:30am
Moorfoot Hall Edinburgh International Conference Centre

10:00am

Mirage OS & XAPI project update, Anil M, Cambridge University and Jonatham Ludlam, Citrix
The creation of the Linux Foundation Labs Xen Project has been a big step forward for the Xen hypervisor community. But the Xen hypervisor isn't the only project that's been accepted into the Linux Foundation: The Xapi Project is the umbrella project for the open development of the
Xapi Toolstack, the set of software that powers XenServer and XCP. In this talk a status update for the project will be given, discussing therelationship between the Xapi project and the newly forming XenServer development community and the convergence of XCP and XenServer. The use of libraries and technology co-developed with the Mirage project will be highlighted.

Mirage is a unikernel that allows us to build applications which can be compiled to very diverse environments: the same code can be linked to run as a regular Unix app, relinked to run as a FreeBSD kernel module, and also linked into a self-contained kernel which can run on the Xen hypervisor.

Since the talk last year, we have developed around 40 new libraries that implement significant stub domain functionality; vchan, blkfront/netfront that compile in UNIX *and* Xen with similar interfaces, a message switch
that coordinates fault-tolerant communication, and an interactive fbdev. In a nutshell, it makes moving to stub domains practical where previously it was for single VM appliances. As part of this effort, we have also identified several possible improvements in hypervisor interfaces.

We would also like to announce the first 1.0 public release here!

Speakers
JL

Jonathan Ludlam

Jon Ludlam works as an Architect and Dev Lead at Citrix and has worked on XenServer and in particular the Xapi project for the last 6 years. He is also an external partner at the OCaml Labs, and spoke on XCP at | XenSummit 2010.
AM

Anil Madhavapeddy

Senior Research Fellow, University of Cambridge
Anil Madhavapeddy is a Senior Research Fellow at the University of Cambridge, based in the Systems Research Group. He was on the original team that developed the Xen hypervisor, and helped develop an industry-leading cloud management toolstack written entirely in OCaml. This XenServer product has been deployed on hundreds of thousands of physical hosts, and drives critical infrastructure for many Fortune 500 companies. Prior to obtaining his... Read More →


Friday October 25, 2013 10:00am - 10:30am
Kilsyth Hall Edinburgh International Conference Centre

10:30am

Break
Friday October 25, 2013 10:30am - 11:00am
Kilsyth Hall Edinburgh International Conference Centre

11:00am

Performance Optimization on Xen-based Android Device, Jack Ren, Intel and Xiantao Zhang, Intel
Mobile devices, such as smart phones and tablets, are becoming de-facto everyday computing and communication devices, virtualization can bring additional benfits to mobile devices for both security and manageability. IT department may use hypervisor, as a highly secure solution, to manage autherized mobile devices, such as for network traffic monitoring, filtering, scan (for virus detection), and/or OS update/patching even when the guest OS becomes completely dead. We insert Xen to the mobile OS Android to deprivilege Android as guest for security and manageability purpose. However, the usage case of mobile device is quit different with that of server, for example mobile devices runs completely different benchmarks (mostly multimedia focused) vs. that in server (mostly responsiveness focused). We analyze the gap of Xen as a mobile hypervisor and present how we improve the performance.

Speakers
JR

Jack Ren

Intel OTC Android architect, Intel
Jack Ren: Android architect from Intel, now focusing on utilizing the virtualization technology in IA-based Android devices.
XZ

Xiantao Zhang

Xiantao Zhang is the senior engineer & engineer manager of virtualization team from Intel Open Source Technology Center, and has been working on Xen since 2005. Xiantao has worked on various areas in virtualization, including Xen/IA64 support, interrupt virtualization, IOMMU, nested virtualization, HVM dom0, Xen mobile projects etc. Xiantao received his Phd Degree in 2008 on Information Security from Wuhan University.


Friday October 25, 2013 11:00am - 11:30am
Moorfoot Hall Edinburgh International Conference Centre

11:00am

Xenserver-core: What it is, how it is built and how to get involved, Euan Harris, Citrix
XenServer is open source and freely available, but it is packaged as an appliance image which must be installed on dedicated hardware. xenserver-core repackages the core components of XenServer so they can easily be built and installed on a standard Linux distribution. Its main goals are: * to make it easy to download, modify and build XenServer components, or just learn how they work; * to help upstream distributions to include up-to-date XenServer packages; * to provide an environment for experimentation. This talk will explain the motivations behind xenserver-core and how it relates to the open-sourcing of XenServer. For developers, it will cover how to get the code, how to build it and how to contribute back to the project. For packagers, it will explain the project's development and release processes and what an upstream maintainer can expect from it.

Speakers
EH

Euan Harris

Citrix
Euan Harris is an engineer at Citrix, where he works on OpenStack, the XenServer toolstack and xenserver-core. He has been particularly involved in building and packaging xenserver-core. | | Prior speaking experience: academic conferences/seminars, graduate recruiting events


Friday October 25, 2013 11:00am - 11:30am
Kilsyth Hall Edinburgh International Conference Centre

11:30am

SecureServe: A Multi-level Secure Server Virtualization Platform on Xen, Jason Sonnek, Adventium Labs
Due to the rapid shift toward cloud computing, virtual desktop infrastructure (VDI) and thin client computing, many organizations in the government desire a high assurance, multi-level secure server virtualization platform that is low-cost, open and enterprise ready. In this presentation, Jason Sonnek will present SecureServe, a recently launched effort to develop such a platform by building on the open-source Citrix XenServer. The SecureServe project will draw upon research in a number of areas, including dom0 disaggregation, Xen Security Modules mandatory access controls and static/dynamic attestation. In this presentation, Jason will describe the project objectives and requirements, the project's relation to Citrix XenClient XT and XenServer Windsor, current development status and plans for moving forward.

Speakers
JS

Jason Sonnek

Adventium Labs
Mr. Jason Sonnek is a principal research scientist at Adventium Labs, a research lab in Minneapolis, MN. His interests include virtualization, cloud computing, operating systems and computer security. His current research is primarily focused on leveraging virtualization to build secure systems. Mr. Sonnek is the principal investigator on the on-going SecureServe project, a recently launched effort to build a secure server virtualization platform... Read More →


Friday October 25, 2013 11:30am - 12:00am
Kilsyth Hall Edinburgh International Conference Centre

11:30am

Performance Evaluation of Live Migration based on Xen ARM PVH, Jaeyong Yoo, Samsung
Electricity charge for operating data centers is reaching approximately 27% of total operation cost. For this reason, ARM servers have been getting more attention for future energy-efficient data centers and the performance of ARM processors keeps increasing (i.e., almost 3GHz). For efficiently utilizing ARM cores, ARM PVH has been introduced in Xen 4.3, and based on this, we have implemented live migration feature and evaluated on top of dualcore ARM board. More specifically, we choose multimedia streaming workload, measure the maximum concurrent clients, and calculate clients per watt (CPW) as the performance metric. From this, we have found out that even dualcore ARM processor (with virtualization) gives higher CPW (7 CPW) over x86 case (6 CPW). In addition we could reduce the energy consumption around 70% (4-to-1 consolidation for low-loaded servers) by using server consolidation.

Speakers
JY

Jaeyong Yoo

Samsung
Jaeyong Yoo received M.S. and Ph.D. in Networked Computing Systems Lab. in GIST, Korea, in 2006 and 2012, respectively. From 2012, he has joined Cloud OS Lab. in Software center, Samsung Electronics. In Cloud OS Lab. he is one of the members of ARM virtualization project and working on live migration and virtual switch development for ARM virtual environments.


Friday October 25, 2013 11:30am - 12:00pm
Moorfoot Hall Edinburgh International Conference Centre

12:00pm

Erlang on Xen: Redefining the Software Stack, Viktor Sovietov
Today the software stack inside cloud instances closely follows the traditional pattern, the pattern optimised for a completely different settings. The emerging OS-less software technologies promise to radically simplify the software inside virtual servers. Erlang on Xen is one of such technologies. It is a highly-compatible reimplementation of the Erlang VM that run directly on Xen. The super-elastic services based on Erlang on Xen adhere to 7 'commandments': 1) Do not assume the presence of OS underneath; 2) Software must be oblivious to boundaries of physical nodes 3) All services share the same auto-scalable infrastructure 4) Run computations near the data they process 5) Child nodes get configuration from the parent only 6) Avoid “administration” at all costs 7) SMP is abomination of cloud computing.

Speakers
VS

Viktor Sovietov

CEO, Cloudozer LLP
Viktor Sovietov is the architect and strategist in Erlang On Xen project. Viktor has two decades of IT experience and is an entrepreneur who has founded a number of software companies specialising in distributed and parallel processing and management as well as in artificial intelligence.


Friday October 25, 2013 12:00pm - 12:30pm
Kilsyth Hall Edinburgh International Conference Centre

12:00pm

Enabling Fast, Dynamic Network Processing with ClickOS, Joao Martins, NEC
While virtualization technologies like Xen have been around for a long time, it is only in recent years that they have started to be targeted as viable systems for implementing middlebox processing (e.g., firewalls, NATs). But can they provide this functionality while yielding the high performance expected from hardware-based middlebox offerings? In this talk Joao Martins will introduce ClickOS, a tiny, MiniOS-based virtual machine tailored for network processing. In addition to the vm itself, Joao Martins will describe performance improvements done to the entire Xen I/O pipe. Finally, Joao Martins will discuss an evaluation showing that ClickOS can be instantiated in 30 msecs, can process traffic at 10Gb/s for almost all packet sizes, introduces delay of 40 microseconds and can run middleboxes at rates of 5 Mp/s.

Speakers
JM

Joao Martins

NEC
NEC Europe Ltd. established the NEC Laboratories Europe in 1994. Today, the laboratories are located in Heidelberg, Germany and Acton, UK. Research and development functions are integrated into the same organization to shorten the time to market of cutting-edge ICT technologies. Ongoing European projects include CHANGE and Trilogy2, with topics including fast packet I/O and software switching, MPTCP, middlebox processing, and virtualized... Read More →


Friday October 25, 2013 12:00pm - 12:30pm
Moorfoot Hall Edinburgh International Conference Centre

12:30pm

Lunch
Friday October 25, 2013 12:30pm - 1:45pm
Moorfoot Hall Edinburgh International Conference Centre

1:45pm

BoF Announcement
Friday October 25, 2013 1:45pm - 2:00pm
Moorfoot Hall Edinburgh International Conference Centre

2:00pm

Delivering continuous deployment of xen-api at cloud scale, John Garbutt, Rackspace
Currently xen-api is really only installed today as part of XenServer. It has traditional enterprise style releases, with controlled upgrades and hotfixes when required.

When deploying OpenStack Rackspace, with the help of the OpenStack community, have adopted an approach where any check-in could be deployed, and the system upgraded, from any other checkin from that last release, or earlier in the current release.

It would be interesting to see if xen-api could move towards a model. At a minimum having more regular check points where an upgrade would be possible.

When running a cloud, a very small amount of control plane downtime is possible, but ideally there should be zero downtime for user's virtual machines. We should explore the ability to only upgrade Xen as a last resort, but still be able to update as much the control and data plane as possible, while keeping VMs alive.

Speakers
avatar for John Garbutt

John Garbutt

Principal Engineer, Rackspace
John is currently a Principal Engineer at Rackspace, Nova PTL for the Liberty and Mitaka releases, and has been involved with OpenStack as a Software Developer since late 2010. He started with Citrix's Project Olympus private cloud packaging of OpenStack, and soon after working upstream to help maintain OpenStack's support for XenServer. In early 2013 I started working on the Rackspace Public Cloud. He has spoken at many events including the... Read More →


Friday October 25, 2013 2:00pm - 2:30pm
Kilsyth Hall Edinburgh International Conference Centre

2:00pm

In-Guest Mechanism to Strengthen Guest Separation, Philip Tricca, Citrix
Terms related to security like 'disaggregation' and 'stubdom' have found their way into the standard Xen vernacular. Implementations of these architectures still require heavy lifting but examples have made their way into both the open source and commercial products. In this talk Philip presents a lesser known but complimentary method to confine QEMU processes using SELinux type enforcement. This architecture alone is interesting but Philip believes its utility extends beyond QEMU and SELinux. Future problems like inter-VM communication mechanisms hold unique challenges with regard to access control and policy semantics. Philip will argue that an approach influenced by sVirt and user-space object managers will be useful here. As always, attendees should expect tangents into abstract topics like the nature of trust and the utopic world that strong security mechanisms will bring about.

Speakers
PT

Philip Tricca

Philip has been working at the intersection of OSS, security and virtualization for 5 years. He got his start in a US government research lab which turned out to be the ideal environment for tinkering with Linux and some of the more interesting security infrastructure therein. He went on to contribute to the construction of a client virtualization system. This system is unique in its embedded nature and focus on security. It proved to be a... Read More →


Friday October 25, 2013 2:00pm - 2:30pm
Moorfoot Hall Edinburgh International Conference Centre

2:30pm

BoF: XAPI, continous deployment and OpenStack, John Garbutt, Rackspace
Speakers
avatar for John Garbutt

John Garbutt

Principal Engineer, Rackspace
John is currently a Principal Engineer at Rackspace, Nova PTL for the Liberty and Mitaka releases, and has been involved with OpenStack as a Software Developer since late 2010. He started with Citrix's Project Olympus private cloud packaging of OpenStack, and soon after working upstream to help maintain OpenStack's support for XenServer. In early 2013 I started working on the Rackspace Public Cloud. He has spoken at many events including the... Read More →


Friday October 25, 2013 2:30pm - 3:00pm
Kilsyth Hall Edinburgh International Conference Centre

2:30pm

Multiple Device Emulators for HVM Guests, Paul Durrant, Citrix
Currently Xen only allows a single device emulator to be attached to each HVM guest in a system and, to date,
this has been QEMU generally running as a process in the same domain as the toolstack, or in a stub domain.

To enable the deployment of virtual GPUs to HVM guests in XenServer, patches were created to allow multiple device emulators to be attached to each HVM guest. QEMU continues to be used to emulate the majority of the devices, but a second process is spawned to handle the virtual GPU. This opens up the possibility of the GPU vendors supplying 'appliance' driver domains in future.

I'd like to give an overview of the changes that we've made to Xen and QEMU to enable the use of multiple emulators, the potential benefits to driver domains, plus the knock on effect of emulator disaggregation on the 'unplug' protocol and what we could do about this.

Speakers
avatar for Paul Durrant

Paul Durrant

Senior Principal Software Engineer, Citrix Systems Inc
My name is Paul Durrant. I am a Senior Principal Software Engineer in the XenServer platform group of Citrix Systems UK, based in Cambridge. My chief responsibilities are Windows Paravirtual drivers, Virtual GPU subsystem, and the guest storage and network data-paths. My work has given me broad experience of Xen (hypervisor, tools and firmware), PV protocols and QEMU. I have been a kernel level programmer since I graduated from the University... Read More →


Friday October 25, 2013 2:30pm - 3:00pm
Moorfoot Hall Edinburgh International Conference Centre

3:00pm

BoF Slot 6
Friday October 25, 2013 3:00pm - 3:45pm
Kilsyth Hall Edinburgh International Conference Centre

3:00pm

XenGT: A software based Intel Graphics Virtualization Solution, Haitao Shan, Intel
GPU virtualization has become an increasingly important requirement for client virtualization and cloud. Significant challenges exists realizing the multiplexing of graphics, media and compute workloads from multiple VMs and achieving the goals of being fully functional, high performance and secure. In this presentation, we will first review existing graphics virtualization technologies, and then introduce how XenGT - an open source solution from Intel - approaches differently. Broad functionality and good performance is achieved by accelerating the native OS graphics stack in each VM with minimum hypervisor intervention. A software mediator ensures the secure multiplexing of workloads from the multiple VMs by managing the scheduling of VMs on the GPU and controlling access to privileged resources and operations.

Speakers
HS

Haitao Shan

Intel
Haitao joined Intel from April 2007, after graduation from Shanghai Jiao Tong University. Haitao had worked as a Xen developer, Parallels technical supporter inside Intel. Working area covers most of VT related features. Currently, Haitao is a manager, managing the graphics virtualization project.


Friday October 25, 2013 3:00pm - 3:45pm
Moorfoot Hall Edinburgh International Conference Centre

3:45pm

Break
Friday October 25, 2013 3:45pm - 4:15pm
Kilsyth Hall Edinburgh International Conference Centre

4:15pm

Perf Support in Xen, Boris Ostrovsky, Oracle
Hardware performance monitoring facilities such as counters can provide invaluable information about system behavior. In recent years, Linux 'perf' has become the standard tool for managing these facilities and interpreting data that they generate. In this talk we will discuss changes to Xen and Linux that will allow PV guests (including dom0) use perf for profiling themselves and, in the case of dom0, the hypervisor.

Speakers
BO

Boris Ostrovsky

Oracle
Boris Ostrovsky is currently at Oracle working on various Linux and Xen projects.


Friday October 25, 2013 4:15pm - 4:45pm
Moorfoot Hall Edinburgh International Conference Centre

4:15pm

BoF: Bootstrapping an Android on Xen and Embedded eco-system
Speakers
avatar for Lars Kurth

Lars Kurth

Director, Xen Project / Citrix
Lars Kurth had his first contact with the open source community in 1997 when he worked on various parts of the ARM toolchain. This experience led Lars to become a passionate open source enthusiast who worked with and for many open source communities over the past 19 years. Lars contributed to projects such as GCC, Eclipse, Symbian and Xen and became the open source community manager for Xen.org in 2011 and later chairman of the Xen Project... Read More →


Friday October 25, 2013 4:15pm - 5:15pm
Kilsyth Hall Edinburgh International Conference Centre

4:45pm

Xen and XenServer Storage Performance, Felipe Franciosi, Citrix
The development of low latency storage media such as modern Solid State Drives (SSD) brings new challenges to virtualisation platforms. For the first time, we are witnessing storage back ends which are so fast that the CPU time spent in processing data significantly impacts the delivered throughput. This is aggravated by CPU speeds remaining largely constant while storage solutions get faster by orders of magnitude. To meet user demands and fully exploit SSD performance under Xen, new technologies are necessary. This talk will discuss the Xen storage virtualisation data path when using various back ends (e.g. blkback, tapdisk, qemu). It will explain why it is hard to exploit SSD performance with current technologies and present measurement data for a variety of workloads. Finally, it will show how techniques such as persistent grants and indirect I/O can help to mitigate the problem.

Speakers
avatar for Felipe Franciosi

Felipe Franciosi

Software Performance Engineer, Citrix
I have been a Software Performance Engineer working for Citrix since October 2011, specifically on XenServer Storage Virtualisation. Previously, I finished a PhD at Imperial College London on performance of virtualised storage. | | My experience with Xen dates back to 2006 during my MSc, when I wrote a framework for deploying Xen hosts and VMs over multicast. Xen Site Manager (XSM, presented at Euro-Par 2007) also supported VM migration... Read More →


Friday October 25, 2013 4:45pm - 5:15pm
Moorfoot Hall Edinburgh International Conference Centre