Xen Project 4.10 Acknowledgements

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Revision as of 13:23, 5 December 2017 by Lars.kurth (talk | contribs) (4.10 Hypervisor Reviewers [ 5 ])

Note that the acknowledgements have been created based on 4.10.0-rc7, which are provisional. The table assumes we release on December 13th, 2017 based on 4.10.0-rc7 including some security fixes that are currently under embargo. These fixes are not included in these statistics.

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 4.9 with Xen 4.10. 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 4.10 Hypervisor Total.

Attribute 4.9 Hypervisor Total [ 1 ] 4.10 Hypervisor Total [ 1 ] 4.10 Hypervisor Core [ 2 ] 4.10 Hypervisor Other [ 3 ] Drivers and Devices (other projects) [ 4 ]
Release Cycle 203 days
128 dev window/days [ 6 ]
6.3 months
174 days [ 7 ]
111 dev window/days [ 6 ]
5.9 months
Development Velocity
Changesets 1549 1250 1143 107 164
Series (=Features) [ 5 ] 807 525
Average Size of Feature 3.2 2.4
Changes / Day 7.6 7.2 (-6.2%)
Changes / Dev Day [ 6 ] 12.1 11.2 (-7.5%)
Features / Day [ 5 ] 4.0 3.0
Code Review Statistics
Review Comments [ 5 ] 8349 6527
Review Comments / Day [ 5 ] 41.1 37.8 (-8.9%)
Review Comments / Dev Day [ 6 ] 65.2 59.2 (-10.2%)
Comments / Series [ 5 ] 17.4 12.5 (-38.7%)
Code Churn
Lines Added 82336 68199 (-20.7%) 44135 24064 8577
Lines Removed 47014 25777 (-82.4%) 23965 1812 6602
Engagement
Individuals 85 80 (-7.5%)
Employers [ 8 ] 29 31 (+6.5%)


4.10 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

Icon Info.png Note that names from e-mail addresses from the FreeBSD and NetBSD communities have not resolved properly


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


4.10 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 Sortable.gif
314 others (less than 10 review comments each) 534
Alexandru Stefan 15
Andre Przywara 42
Andrew Cooper 388
Anthony Perard 44
Boris Ostrovsky 239
Brian Gerst 10
Bruce Richardson 10
Chao Gao 39
Chao P Peng 19
Daniel De Graaf 26
Daniel Kiper 24
Dario Faggioli 97
Dongli Zhang 13
Dou Liyang 13
Doug Goldstein 15
George Dunlap 17
Govinda Tatti 13
Haozhong Zhang 13
Ian Jackson 247
Igor Druzhinin 22
Ingo Molnar 10
Jan Beulich 1167
Jiri Slaby 13
Joao M Martins 16
Josh Poimboeuf 16
Juergen Gross 527
Julien Grall 429
Kevin Tian 76
Konrad Wilk 100
Manish Jaggi 16
Marek Marczykowski-Górecki 17
Meng Xu 22
Olaf Hering 43
Oleksandr Andrushchenko 10
Oleksandr Grytsov 53
Oleksandr Tyshchenko 21
Paolo Bonzini 11
Paul Durrant 207
Peter Zijlstra 11
Petre Pircalabu 23
Praveen Kumar 10
Razvan Cojocaru 43
Roger Pau Monne 357
Ross Lagerwall 26
Sergej Proskurin 50
Sergey Dyasli 21
Stefano Stabellini 439
Tamas K Lengyel 52
Thomas Gleixner 15
Thomas Lendacky 10
Tianyu Lan 52
Tim Deegan 22
Venu Busireddy 11
Volodymyr Babchuk 35
Waiman Long 14
Wei Chen 14
Wei Liu 698
Yi Y Sun 123
Zhongze Liu 21


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 4.10.0-rc7. Note that the code freeze for this release was 4 weeks longer than expected, due to several security issues being fixed towards the end of the release cycle and were held under embargo.
[ 8 ] Only known employers are used. Unknown employers were discounted.