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=== Performace === |
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=== Performance === |
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==== Performance tools overhaul ==== |
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|Project=Performance tools overhaul |
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'''Date of insert''': 02/08/2012
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|Date=02/08/2012 |
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|Contact=Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
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'''Technical contact''': Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
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Generally, works on the performance tool themselves should be listes separately to the [[Xen_Profiling:_oprofile_and_perf]] wiki page. |
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Generally, works on the performance tool themselves should be listes separately to the [[Xen_Profiling:_oprofile_and_perf]] wiki page. |
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=== Xen Cloud Platform (XCP) and XAPI projects === |
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=== Xen Cloud Platform (XCP) and XAPI projects === |
Revision as of 13:00, 6 August 2012
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Needs Refactor
This should be moved to the relevant's a project overview page (or at least be accessible from it). This is basically our "Get Involved" page
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Xen Development Projects
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.
- 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 4.0, Xen 3.4, etc).
- Your kernel related patches should be based on either upstream kernel.org git tree (latest version), or xen/stable-2.6.32.x tree, depending if it's upstream or xen dom0 related work.
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.
List of projects
If you have new ideas, suggestions or development plans let us know and we'll update this list!
Domain support
Upstreaming Xen PVSCSI drivers to mainline Linux kernel
| Date of insert: 01/08/2012; Verified: Not updated in 2020; GSoC: Unknown |
| Technical contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Mailing list/forum for project: xen-devel@ |
| IRC channel for project: #xen-devel |
| Difficulty: Unknown |
| Skills Needed: Unknown |
| Description: PVSCSI drivers needs to be upstreamed yet. Necessary operations may include:
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| Outcomes: Not specified, project outcomes |
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Upstreaming Xen PVUSB drivers to mainline Linux kernel
| Date of insert: 01/08/2012; Verified: Not updated in 2020; GSoC: Unknown |
| Technical contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Mailing list/forum for project: xen-devel@ |
| IRC channel for project: #xen-devel |
| Difficulty: Unknown |
| Skills Needed: Unknown |
| Description: PVUSB drivers needs to be upstreamed yet. Necessary operations may include:
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| Outcomes: Not specified, project outcomes |
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Blkback improvements
| Date of insert: 02/08/2012; Verified: Not updated in 2020; GSoC: Unknown |
| Technical contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Mailing list/forum for project: xen-devel@ |
| IRC channel for project: #xen-devel |
| Difficulty: Unknown |
| Skills Needed: Unknown |
Description: Blkback requires a number of improvements, some of them being:
- Multiple disks in a guest cause contention in the global pool of pages.
- There is only one ring page and with SSDs nowadays we should make this larger, implementing some multi-page support.
- With multi-page it becomes apparent that the segment size ends up wasting a bit of space on the ring. BSD folks fixed that by negotiating a new parameter to utilize the full size of the ring.
- Add DIF/DIX support [1]
- Further perf evaluation needs to be done to see how it behaves under high load.
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| Outcomes: Not specified, project outcomes |
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Netback overhaul
| Date of insert: 02/08/2012; Verified: Not updated in 2020; GSoC: Unknown |
| Technical contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Mailing list/forum for project: xen-devel@ |
| IRC channel for project: #xen-devel |
| Difficulty: Unknown |
| Skills Needed: Unknown |
| Description: Wei Liu posted RFC patches that make the driver be multi-page, multi-event channel and with a page-pool. However not all the issues have been addressed yet, meaning that the patches need to be finished and cleaned up yet. Additively, a zero-copy implementation can be considered. Patch serie and discussions:
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| Outcomes: Not specified, project outcomes |
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PAT writecombine fixup
| Date of insert: 02/08/2012; Verified: Not updated in 2020; GSoC: Unknown |
| Technical contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Mailing list/forum for project: xen-devel@ |
| IRC channel for project: #xen-devel |
| Difficulty: Unknown |
| Skills Needed: Unknown |
| Description: The writecombine feature (especially for graphic adapters) is turned off due to stability reasons. More specifically, the code involved in page transition from WC to WB gets confused about the PSE bit state in the page, resulting in a set of repeated warnings.
For more informations please check:
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| Outcomes: Not specified, project outcomes |
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ACPI S3-state investigation and fixup
| Date of insert: 02/08/2012; Verified: Not updated in 2020; GSoC: Unknown |
| Technical contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Mailing list/forum for project: xen-devel@ |
| IRC channel for project: #xen-devel |
| Difficulty: Unknown |
| Skills Needed: Unknown |
| Description: During Linux-3.3 release the the S3-state was supposed to work including these patches:
But now it is not working anymore. Scope of the project is understanding the reasons for the issues and fix them. |
| Outcomes: Not specified, project outcomes |
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PUD L3 - big memory - fixup
| Date of insert: 02/08/2012; Verified: Not updated in 2020; GSoC: Unknown |
| Technical contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Mailing list/forum for project: xen-devel@ |
| IRC channel for project: #xen-devel |
| Difficulty: Unknown |
| Skills Needed: Unknown |
| Description: Right now guests don't boot with a huge amount of requested kernel memory (tries report failing with certainly 384GB). Scope of the project is understanding the reasons and fix them. This likely involves digging into the toolstack too. |
| Outcomes: Not specified, project outcomes |
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Parallel xenwatch
| Date of insert: 01/08/2012; Verified: Not updated in 2020; GSoC: Unknown |
| Technical contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Mailing list/forum for project: xen-devel@ |
| IRC channel for project: #xen-devel |
| Difficulty: Unknown |
| Skills Needed: Unknown |
| Description: Xenwatch is locked with a coarse lock. For a huge number of guests this represents a scalability issue. The need is to rewrite the xenwatch locking in order to support full scalability. |
| Outcomes: Not specified, project outcomes |
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Hypervisor
Microcode uploader implementation
| Date of insert: 02/08/2012; Verified: Not updated in 2020; GSoC: Unknown |
| Technical contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Mailing list/forum for project: xen-devel@ |
| IRC channel for project: #xen-devel |
| Difficulty: Unknown |
| Skills Needed: Unknown |
| Description: Intel is working on early implementation where the microcode blob would be appended to the initrd image. The kernel would scan for the appropiate magic constant and load the microcode very early.
The Xen hypervisor can do this similary. |
| Outcomes: Not specified, project outcomes |
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Performance
Performance tools overhaul
| Date of insert: 02/08/2012; Verified: Not updated in 2020; GSoC: Unknown |
| Technical contact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
| Mailing list/forum for project: xen-devel@ |
| IRC channel for project: #xen-devel |
| Difficulty: Unknown |
| Skills Needed: Unknown |
| Description: Generally, works on the performance tool themselves should be listes separately to the Xen_Profiling:_oprofile_and_perf wiki page. |
| Outcomes: Not specified, project outcomes |
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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!
Quick links to changelogs of the various Xen related repositories/trees
Please see XenRepositories wiki page!
