Difference between revisions of "Xen Project 4.11 Acknowledgements"

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(Overview)
(Overview)
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The following table compares Xen 4.10 with Xen 4.11. 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 4.11 Hypervisor Total.  
 
The following table compares Xen 4.10 with Xen 4.11. 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 4.11 Hypervisor Total.  
  
<span style="color:red"><b>Note:</b></span> The data below shows a significant reduction in code review activity. This figure is substantially skewed by a number of large and complex security related code series developed in private under NDAs. In other words, the reduction signifies that we are doing fewer public reviews to satisfy requirements that allow project members to fix issues under security embargoes.  
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<span style="color:red"><b>Note:</b></span> The data below shows a significant reduction in public code review activity. This figure is substantially skewed by a number of large and complex security related code series that were developed in private under security embargoes. In other words, the reduction signifies that we are doing fewer public reviews to satisfy requirements that allow project members to fix issues under security embargoes.  
  
 
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Revision as of 11:03, 18 June 2018

Icon todo.png To Do:

The data is based on staging, snapshot June 18, 2018.


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 4.10 with Xen 4.11. 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 4.11 Hypervisor Total.

Note: The data below shows a significant reduction in public code review activity. This figure is substantially skewed by a number of large and complex security related code series that were developed in private under security embargoes. In other words, the reduction signifies that we are doing fewer public reviews to satisfy requirements that allow project members to fix issues under security embargoes.

Attribute 4.10 Hypervisor Total [ 1 ] 4.11 Hypervisor Total [ 1 ] 4.11 Hypervisor Core [ 2 ] 4.11 Hypervisor Other [ 3 ] Drivers and Devices (other projects) [ 4 ]
Release Cycle 174 days
111 dev window/days [ 6 ]
5.9 months
201 days
129 dev window/days [ 6 ]
6.8 months
Development Velocity
Changesets 1250 1793 (+30.3%) TODO TODO TODO
Series (=Features) [ 5 ] 525 676
Average Size of Feature 2.3 2.7
Changes / Day 7.2 8.9 (+19.5%)
Changes / Dev Day [ 6 ] 11.2 12.9 (+12.7%)
Features / Day [ 5 ] 3.0 3.4
Code Review Statistics
Review Comments [ 5 ] 6527 4525
Review Comments / Day [ 5 ] 37.8 22.5 (-67.8%)
Review Comments / Dev Day [ 6 ] 59.2 32.6 (-81.9%)
Comments / Series [ 5 ] 12.5 6.7 (-87.0%%)
Code Churn
Lines Added 68199 65300 TODO TODO TODO
Lines Removed 25777 21560 TODO TODO TODO
Engagement
Individuals 80 TODO (TODO%)
Employers [ 7 ] 31 TODO (TODO%)


4.11 Hypervisor Only Code Contributions [ 2 ]

Breakdown by Individual

This table is sortable : please click on the Sortable.gif icon besides the column header, to sort by a specific column.

Name Sortable.gif Lines Added Sortable.gif Lines Removed Sortable.gif Changesets Sortable.gif


Code Contributions to Xen Related Drivers and Devices in Linux, NetBSD, FreeBSD [ 4 ]

Breakdown by Individual

This table is sortable : please click on the Sortable.gif icon besides the column header, to sort by a specific column.

Name Sortable.gif Lines Added Sortable.gif Lines Removed Sortable.gif Changesets Sortable.gif


4.11 Hypervisor Reviewers [ 5 ]

This table is sortable : please click on the Sortable.gif 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 Sortable.gif Review Comments (excludes replies to own series) Sortable.gif
240 others (less than 10 review comments each) 555
Jan Beulich 1,177
Andrew Cooper 618
Julien Grall 554
Roger Pau Monne 395
Wei Liu 376
Stefano Stabellini 354
Juergen Gross 282
Boris Ostrovsky 226
Oleksandr Andrushchenko 215
George Dunlap 190
Paul Durrant 142
Andre Przywara 100
Ian Jackson 136
Razvan Cojocaru 68
Kevin Tian 66
Konrad Wilk 56
Tamas K Lengyel 51
Dario Faggioli 50
Mirela Simonovic 50
Daniel Kiper 45
Olaf Hering 45
Chao Gao 41
Alexandru Isaila 39
Anthony Perard 39
Lars Kurth 38
Volodymyr Babchuk 37
Doug Goldstein 34
Paul Semel 29
Manish Jagg 28
Anthony Liguori 26
Michael Tsirkin 26
Takashi Iwai 25
Tim Deegan 23
Simon Gaiser 22
Daniel Vetter 21
Ross Lagerwall 21
Marek Marczykowski 19
Daniel Berrange 18
Sky Liu 15
Govinda Tatti 15
Alexey Gerasimenk 15
Oleksandr Grytsov 14
Igor Druzhinin 14
Maran Wilson 14
Marc Zyngier 14
Ingo Molnar 14
Christian Lindig 13
Brian Woods 12
Sergey Dyasli 12
Andrii Anisov 11
Dmitry Torokhov 11
Dongwon Kim 11
Natarajan Janakarajan 11
homas Garnier 11
Volodymyr Babchuk 11
Zhenzhong Duan 11
Arnd Bergmann 10
David Woodhouse 10
Eric Blak 10
Zhouyang Jia 10


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 ] Only known employers are used. Unknown employers were discounted.