Archived/Xen Development Projects: Difference between revisions
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|Outcomes=Expected outcome: |
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* Mainline patches for libxc and libxl |
* Mainline patches for libxc and libxl |
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|Project=CPUID Programming for Humans |
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|Date=02/04/2014 |
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|Contact=Andres Lagar-Cavilla <andres@lagarcavilla.org> |
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|GSoC=Yes |
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|Desc=When creating a VM, a policy is applied to mask certain CPUID features. Right now it's black magic. |
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THe KVM stack has done an excellent job of making this human-useable, and understandable. |
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For example, in a qemu-kvm command-line you may encounter: |
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-cpu SandyBridge,+pdpe1gb,+osxsave,+dca,+pcid,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme |
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And in <qemu>/target-i386.c you find a fairly comprehensive description of x86 processor models, what CPUID features are inherent, and what CPUID feature each of these symbolic flags enables. |
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In the Xen world, there is a libxc interface to do the same, although it's all hex and register driven. It's effective, yet horrible to use. |
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An ideal outcome would have libxl config files and command line absorb a similarly human-friendly description of the CPUID features a user wishes for the VM, and interface appropriately with libxl. Further, autodetection of best CPUID shuold yield a human-readable output to be able to easily understand what the VM thinks about its processor. |
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Finally, interfacing with libvirt should be carefully considered. |
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CPUID management is crucial in a heterogeneous cluster where migrations and save restore require careful processor feature selection to avoid blow-ups. |
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|Skills= A good understanding of C user-land programming, and the ability to dive into qemu/libvirt (for reference code and integration), as well as libxc and libxl (for implementation). |
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|Outcomes=Expected outcome: |
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* Mainline patches for libxl |
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}} |
}} |
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Revision as of 17:11, 5 February 2014
This page lists various Xen related development projects that can be picked up by anyone! If you're interesting in hacking Xen this is the place to start! Ready for the challenge?
To work on a project:
- Find a project that looks interesting (or a bug if you want to start with something simple)
- Send an email to xen-devel mailinglist and let us know you started working on a specific project.
- Post your ideas, questions, RFCs to xen-devel sooner than later so you can get comments and feedback.
- Send patches to xen-devel early for review so you can get feedback and be sure you're going into correct direction.
- Your work should be based on xen-unstable development tree, if it's Xen and/or tools related. After your patch has been merged to xen-unstable it can be backported to stable branches (Xen 4.2, Xen 4.1, etc).
- Your kernel related patches should be based on upstream kernel.org Linux git tree (latest version).
xen-devel mailinglist subscription and archives: http://lists.xensource.com/mailman/listinfo/xen-devel
Before to submit patches, please look at Submitting Xen Patches wiki page.
If you have new ideas, suggestions or development plans let us know and we'll update this list!
List of projects
Domain support
Upstreaming Xen PVSCSI drivers to mainline Linux kernel
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Upstreaming Xen PVUSB drivers to mainline Linux kernel
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Implement Xen PVSCSI support in xl/libxl toolstack
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Implement Xen PVUSB support in xl/libxl toolstack
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Block backend/frontend improvements
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Utilize Intel QuickPath on network and block path.
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perf working with Xen
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PAT writecombine fixup
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Parallel xenwatch
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Enabling the 9P File System transport as a paravirt device
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OVMF Compatibility Support Module support in Xen
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Hypervisor
Introducing PowerClamp-like driver for Xen
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NUMA effects on inter-VM communication and on multi-VM workloads
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Integrating NUMA and Tmem
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Is Xen ready for the Real-Time/Embedded World?
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HVM per-event-channel interrupts
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Userspace Tools
Refactor Linux hotplug scripts
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XL to XCP VM motion
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VM Snapshots
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Allowing guests to boot with a passed-through GPU as the primary display
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Advanced Scheduling Parameters
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CPU/RAM/PCI diagram tool
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KDD (Windows Debugger Stub) enhancements
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Lazy restore using memory paging
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CPUID Programming for Humans
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Performance
Create a tiny VM for easy load testing
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Xen Cloud Platform (XCP) and XAPI projects
There are separate wiki pages about XCP and XAPI related projects. Make sure you check these out aswell!
Fuzz testing Xen with Mirage
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Mirage OS XCP/Xen support
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From simulation to emulation to production: self-scaling apps
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Towards a multi-language unikernel substrate for Xen
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DRBD Integration
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Expose counters for additional aspects of system performance in XCP
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Add support for XCP performance counters to be sampled at varying rates
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XCP backend to Juju/Chef/Puppet/Vagrant
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RBD (Ceph) client support in XCP
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Add connection tracking capability to the Linux OVS
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- XCP and XAPI development projects: XAPI project suggestions
- XCP short-term roadmap: XCP short term roadmap
- XCP monthly developer meetings: XCP Monthly Meetings
- XAPI developer guide: XAPI Developer Guide
Please see XenRepositories wiki page!