<h2>Welcome</h2>
<p><i>We will open XenSummit with a brief update on the hightlights of the last year. And we are planning a couple of surprises. Stay posted.</i></p>
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+ <br />Download <a href="http://www.slideshare.net/xen_com_mgr/xensummit-2012-na-opening">original</a>
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<p>Gianluca Guida is a Senior Software Engineer at Citrix. He started working on Xen in 2007,
when he joined the soon-to-be-acquired XenSource. He has joined back Citrix in 2011, working
in the XenClient Team.</p>
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<p><b>Anil Madhavapeddy, University of Cambridge</b></p>
<p><p>Anil Madhavapeddy is a Senior Research Fellow at Wolfson College Cambridge, based in the Systems Research Group in the Computer Laboratory. He tackles on the problem of constructing efficient, large-scale secure systems, often via advances in formal methods, pro- gramming language and operating systems. Dr. Madhavapeddy was on the original team at Cambridge that developed Xen, and subsequently commercialised XenServer as the senior architect and product director for XenSource/Citrix.</p></p>
- <p><b>Richard Mortier, University of Nottingham</b></p>
- <p><p>Richard Mortier is a Horizon Transitional Fellow in Computer Science at the University of Nottingham. His research interests are currently focused around systems and networked technologies connected with the Digital Economy. Specific current topics include rebuilding home network infrastructure to better address user needs; building infrastructure to support privacy-preserving personal data processing; and tools to support better use of cloud computing. Prior to joining Nottingham he spent two years as founder at Vipadia Limited designing and building the Clackpoint and Karaka products acquired by Voxeo Corp., six years as a researcher at Microsoft Research Cambridge, and seven months as a visiting researcher at Sprint ATL, CA. He received a Ph.D. from the Systems Research Group at the University of Cambridge Computer Laboratory, and a B.A. in Mathematics, also from the University of Cambridge.</p></p>
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<p><b>Xiantao Zhang, Senior Software Engineer, Intel Open Source Technology Center</b></p>
<p>Xiantao Zhang is a Senior Software Engineer from Intel Open Source Technology Center, and has been working on Xen since 2005. Xiantao has worked on various areas, including Xen/IA64 support, interrupt virtualization, IOMMU, nested virtualization etc. Xiantao received his Phd Degree in 2008 on Information Security from Wuhan University. </p>
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- <h2>Linux Stubdomain
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<p><i><p>As the current stubdomain based on minios is difficult to maintain, we have worked on a stubdomain based on Linux. This helps to use QEMU upsteam in the stubdom with little change.</p><p>So first I will present how a Linux based stubdomain is built and lauched, and the difficulties around it. Then, to see if this is a viable option, I will show disk and network benchmarks to compare it with a traditional QEMU in dom0 configuration. </p><p>To finish, I will present the current limitations of this type of stubdomains.</p></i></p>
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<p><b>Anthony PERARD</b></p>
<p>Anthony PERARD is a Software Development Engineer at Citrix since 2 year. His main task was to upstream the Xen's fork of QEMU.</p>
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currently working as Senior Software Engineer for Citrix on the
Xen team. His main area of responsibility is performance analysis
for issues relating to the hypervisor.</p>
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<p><b>Konrad Rzeszutek Wilk, Oracle</b></p>
<p>Konrad is an engineer working since 2009 with Jeremy on upstreaming in the Linux kernel the Xen components. It has been quite fantastic and he is looking forward to share the roadmap with the community!</p>
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<p><b>John Garbutt, Senior Software Developer, Citrix</b></p>
<p>John Garbutt is a Senior Software Developer with Citrix. Since October 2010, John has been contributing to OpenStack, with a particular focus on the XenServer support. In his spare time, John plays the Tuba.</p>
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<p><p>Cherry G. Mathew is a BSD hacker. His contributions to the Xen BSD ecosystem are the NetBSD balloon driver and multiprocessor support for NetBSD domU. He is currently working on FreeBSD dom0 support, under sponsorship of Spectralogic corporation.</p></p>
<p><b>Roger Pau Monné, Citrix</b></p>
<p><P>Roger Pau Monné is a Software Engineer and BSD enthusiast. He has contributed to porting libxl to NetBSD and is working closely with NetBSD on Xen under the Citrix umbrella.</P></p>
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currently working as Senior Software Engineer for Citrix on the
Xen team. His main area of responsibility is performance analysis
for issues relating to the hypervisor.</p>
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<p><b>Wei Huang, AMD, Operating System Research Center</b></p>
<p>Wei Huang is a member of AMD Operating System Research Center. He is an active member of Xen community.
His interests include OS, CPU virtualization and cloud computing.</p>
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<h2>From printk to QEMU: Xen/Linux Kernel debugging</h2>
<p><i>Current experience shows that a lot of developers working on Xen/Linux kernel use mainly only small set of debugging tools. Often they are sufficient for generic work. However, when unusual problem arises which could not be easily debugged using known tools sometimes they are trying to reinvent the wheel. Goal of this session is to present wide range of debugging tools starting from simplest one to most feature reach solutions in context of Xen/Linux kernel debugging. It will describe pros and cons of printk (serial, debug console, etc.), gdb, gdbsx, kgdb, QEMU, kdump and others. Additionally, there will be some information about possible new solutions and current kexec/kdump developments for Xen.</i></p>
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- <p><b>Daniel Kiper, Software Developer V, Oracle</b></p>
+ <p><b>Daniel Kiper, Software Developer, Oracle</b></p>
<p>Daniel Kiper was Google Summer of Code 2010 (memory hotplug/balloon driver) and Google Summer of Code 2011 (kexec/kdump) student. He is involved in *NIX administration/development since 1994. Currently his work and interests focuses on kexec/kdump implementation for Xen.</p>
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<p><i>CloudStack, the world's leading open-source cloud infrastructure platform, was recently donated to the Apache Foundation, and is now an incubated Apache project. Ewan Mellor, Director of Engineering in the Citrix Cloud Platforms Group will describe the CloudStack project and explain why Xen is the pre-eminent hypervisor in public clouds today. He will describe the changes coming in CloudStack in the next 12 months, and how they are going to change the way that Xen is consumed in public and private clouds next year.</i></p>
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<p><b>Ewan Mellor, Director of Development, Citrix</b></p>
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<p><i><p>In this session we examined the Xen PV performance on the latest platforms in a few cases that covers CPU/memory intensive, disk intensive and network intensive workloads. We compared Xen PV guest vs. HVM/PVOPS to see whether PV guest still have advantage over HVM on a system with state-of-the-art VT features. KVM was also compared as a reference. We also compared PV driver performance against bare-metal and pass-through/SR-IOV. The identified issues were discussed and we presented our proposal on fixing those issues.</p></i></p>
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<p><b>Zhidong Yu, Intel</b></p>
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<p><b>John Garbutt, Senior Software Developer, Citrix,</b></p>
<p><p>John Garbutt is a Senior Software Developer with Citrix. Since October 2010, John has been contributing to OpenStack, with a particular focus on the XenServer support. In his spare time, John plays the Tuba.</p></p>
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<p><i>PV guest in HVM container is needed for 64bit performance. The system call overhead is eliminated when running in HVM container as the kernel can run in ring 0. </i></p>
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<p><b>Mukesh Rathor, Oracle</b></p>
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<p><b>Adam Wick, Galois</b></p>
<p>Adam Wick currently works for Galois, Inc., a small research and development company in Portland, OR. At Galois, Adam runs the secure networking and network defense group, trying to use cutting-edge technology and out-of-the-box thinking to protect critical networks. Previously, Adam has performed research in the related areas of operating systems and programming language runtimes. Adam received his B.S. in Computer Science from Indiana University in 2000, and his Ph.D. from the University of Utah in 2006.</p>
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