Xen Project 4.9 Acknowledgements
Note that the acknowledgements have been created based on 4.9.0-rc7, which is expected to be the final RC for Xen 4.9.0 (with the exception of some security fixes under embargo). If there is another release candidate, data needs to be updated.
Overview
As we have made significant changes to the xen source tree structure, we will count acknowledgements in line with RFC Xen 4.6 Acknowledgements.
The following table compares Xen 4.8 with Xen 4.9. We also cover changes to Xen only components in Linux, FreeBSD, NetBSD and QEMU in the "Drivers and Devices" column, which are primarily made by Xen Project developers. Note that the number is not part of the 4.9 Hypervisor Total.
| Attribute | 4.8 Hypervisor Total [ 1 ] | 4.9 Hypervisor Total [ 1 ] | 4.9 Hypervisor Core [ 2 ] | 4.9 Hypervisor Other [ 3 ] | Drivers and Devices (other projects) [ 4 ] |
|---|---|---|---|---|---|
| Release Cycle | 161 days 124 dev window/days [ 6 ] 5.3 months |
176 days [ 7 ] 128 dev window/days [ 6 ] 5.9 months |
|||
| Development Velocity | |||||
| Changesets | 1245 | 1500 (+17.0%) | 1275 | 225 | 275 |
| Series (=Features) [ 5 ] | 575 | 470 (-22.3%) | |||
| Average Size of Feature | 2.17 | 3.19 (+32%) | |||
| Changes / Day | 7.7 | 8.5 (+8.7%) | |||
| Changes / Dev Day [ 6 ] | 10.0 | 11.7 (+14.7%) | |||
| Features / Day [ 5 ] | 3.6 | 2.7 (-34.8%) | |||
| Code Review Statistics | |||||
| Review Comments [ 5 ] | 6960 | 7374 (+5.6%) | |||
| Review Comments / Day [ 5 ] | 43.6 | 41.9 (-4.1%) | |||
| Comments / Series [ 5 ] | 11.9 | 15.7 (+24.2%) | |||
| Code Churn | |||||
| Lines Added | 78899 | 80728 (+2.3%) | 75763 | 4965 | 18189 |
| Lines Removed | 62325 | 46291 (-70.4%) | 44726 | 1565 | 12500 |
| Engagement | |||||
| Individuals | 68 | 84 (+19.1%) | 82 | 10 | 78 |
| Employers [ 8 ] | 25 | 28 (+10.7%) | 27 | 6 | 25 |
4.9 Hypervisor Only Code Contributions [ 2 ]
Breakdown by Individual
|
To Do:
Insert data - will have to do this post the 4.9 release |
This table is sortable : please click on the 
icon besides the column header, to sort by a specific column.
| Name
|
Lines Added
|
Lines Removed
|
Changesets
|
|---|
4.9 Hypervisor Related Code Contributions [ 3 ]
Breakdown by Individual
Note that the table below does not cover contributions to Linux, NetBSD, FreeBSD, QEMU, libvirt and other related projects. It lists contributors to mini-os (formerly part of xen.git), osstest (our test code and test cases), raisin (a deployment and test tool), xtf.git and livepatch-build-tools (tools to builld livepatch payloads).
This table is sortable : please click on the icon besides the column header, to sort by a specific column.
| Name
|
Lines Added
|
Lines Removed
|
Changesets
|
|---|
Code Contributions to Xen Related Drivers and Devices in Linux, NetBSD, FreeBSD [ 4 ]
Breakdown by Individual
|
|
To Do:
Insert data - will have to do this post the 4.9 release |
This table is sortable : please click on the icon besides the column header, to sort by a specific column.
| Name
|
Lines Added
|
Lines Removed
|
Changesets
|
|---|
4.9 Hypervisor Reviewers [ 5 ]
This table is sortable : please click on the icon besides the column header, to sort by a specific column. Note that in the table below, we only count review comments by community members other than comments by the author of a patch. We do not count replies and clarifications by the author of a patch that are made in response to review comments by others.
| Name
|
Review Comments
|
|---|---|
| 119 others (less than 10 review comments each) | 345 |
| Alistair Francis | 14 |
| Andre Przywara | 71 |
| Andrew Cooper | 792 |
| Andy Lutomirski | 11 |
| Anthony Perard | 13 |
| Bhupinder Thakur | 22 |
| Boris Ostrovsky | 286 |
| Cedric Bosdonnat | 11 |
| Chao Gao | 41 |
| Dan Streetman | 10 |
| Daniel De Graaf | 16 |
| Daniel Kiper | 100 |
| Dario Faggioli | 69 |
| Doug Goldstein | 82 |
| Elena Reshetova | 13 |
| Fu Wei | 10 |
| George Dunlap | 144 |
| Géza Gémes | 10 |
| Greg Kurz | 24 |
| Grek KH | 17 |
| Haozhong Zhang | 46 |
| Ian Jackson | 225 |
| Jacob Shin | 13 |
| Jan Beulich | 1634 |
| Juergen Gross | 222 |
| Julien Grall | 534 |
| Kevin Tian | 133 |
| Konrad Wilk | 179 |
| Luis R. Rodriguez | 74 |
| Luwei Kang | 11 |
| Olaf Hering | 14 |
| Oleksandr Andrushchenko | 64 |
| Oleksandr Grytsov | 11 |
| Oleksandr Tyshchenko | 24 |
| Paul Durrant | 172 |
| Peter Zijlstra | 14 |
| Praveen Kumar | 19 |
| Quan Xu | 24 |
| Razvan Cojocaru | 66 |
| Roger Pau Monné | 167 |
| Ronald Rojas | 21 |
| Ross Lagerwall | 11 |
| Sergey Dyasli | 17 |
| Shanker Donthineni | 11 |
| Stefano Stabellini | 628 |
| Suravee Suthikulpanit | 26 |
| Tamas Lengyel | 60 |
| Thomas Garnier | 28 |
| Tim Deegan | 68 |
| Vijay Kilari | 10 |
| Waiman Long | 13 |
| Wei Liu | 532 |
| Yi Y Sun | 119 |
| Yu Zhang | 51 |
| Zhang Chen | 18 |
| Zhongze Liu | 14 }} |
Footnotes
[ 1 ] Includes the following repos: xen, mini-os, osstest, raisin, livepatch-build-tools, xtf
[ 2 ] Includes the following repos: xen
[ 3 ] Includes the following repos: mini-os, osstest, raisin, livepatch-build-tools, xtf
[ 4 ] Includes commits to the following Xen specific directories of the following upstream projects: linux: arch/*/xen/ arch/*/include/asm/xen/ drivers/xen/ drivers/*/*xen* include/xen/ arch/*/pci/*xen* ; netbsd: sys/arch/xen; freebsd: sys/dev/xen/ sys/x86/xen sys/xen/; qemu: xen* hw/i386/xen hw/xenpv hw/*/xen* hw/xen include/*/xen*, xen windows pv drivers
[ 5 ] This data was extracted from the Xen Project Code Review Dashboard
[ 6 ] These are the days/months during which we were not in code freeze
[ 7 ] Calculated using 4.9.0-rc7
[ 8 ] Only known employers are used. Unknown employers were discounted. Note that in [1] that clean-up did not happen
