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File:Kernel patches stats.png

Revision as of 19:50, 26 January 2012 by Glic3rinu (talk | contribs) (bugfix: forget to count between 2.6.39 -- 2.3)
Original file(1,600 × 1,200 pixels, file size: 52 KB, MIME type: image/png)


Description

This graph shows how many patches from OpenVZ developers were merged into mainstream Linux kernel, per each kernel version.

It is drawn by gnuplot using the data set obtained from kernel git repository.

Source code

Collect data

Here is the script to produce the data for the graph, called count:

#!/bin/sh
 
# Whose patches to count
PAT='@openvz.org|@parallels.com|@sw.ru|@swsoft.com|@sw.com.sg|adobriyan@|kuznet@'
 
# Return the date of the given tag, in a format usable by gnuplot
get_tag_date() {
	echo $(git show $1 | egrep ^Date: | head -n1) | 
		sed 's/^Date: ... \(.*\) [-+]....$/\1/' |
		sed 's/ ..:..:..//' | sed 's/ /-/g'
}
 
# Count the number of patches whose authors match $PAT,
# for the period between two given git tags
count_patches() {
	git log --pretty=short --no-merges $1..$2 |
		egrep '^Author: ' | egrep $PAT | wc -l
}
 
# Old 2.6 kernel branch
# We start from 2.6.12 -- the first kernel available in git
# and end on 2.6.39 -- the last kernel on 2.6 branch
for f in $(seq 13 40); do
	v1=v2.6.$((f-1))
	d1=$(get_tag_date $v1)
	if [ $f -gt 39 ]; then
		v2=$HEAD
	else
		v2=v2.6.$f
	fi
	d2=$(get_tag_date $v2)
	count=$(count_patches $v1 $v2)
	if test "$count" -gt 0; then
		echo $d2 $v2 " " $count
	fi
 
done | sed 's/ /\t/g'

# New 3.x kernel branch
# Transition: patches from 2.6.39 to 3.0
d2=$(get_tag_date v3.0)
count=$(count_patches v2.6.39 v3.0)
echo $d2 v3.0 " " $count

# What is the latest kernel patch number (i.e. x in 3.x)
latest=$(git tag | grep -v -- -rc | tail -n1 | sed -e 's/^.*\.\(.*\)$/\1/')
 
# Find out if number of patches for HEAD is much more
# than for latest -rc. If yes, use HEAD, otherwise -rc.
last_rc=$(git tag | tail -n 1 | grep -- -rc)
HEAD=$last_rc
if ! test -z "$last_rc"; then
	much_more=15
	count_head=$(count_patches v3.$latest HEAD)
	count_rc=$(count_patches v3.$latest $last_rc)
	if test $count_head -gt $((count_rc+much_more)); then
		HEAD="HEAD   "
	fi
fi

# We start from 3.0
for f in $(seq 1 $((latest+1))); do
	v1=v3.$((f-1))
	d1=$(get_tag_date $v1)
	if [ $f -gt $latest ]; then
		v2=$HEAD
	else
		v2=v3.$f
	fi
	d2=$(get_tag_date $v2)
	count=$(count_patches $v1 $v2)
	if test "$count" -gt 0; then
		echo $d2 $v2 " " $count
	fi
 
done | sed 's/ /\t/g'

Draw the graph

Here is the script to produce the graph. Note it calls the previous script under the name 'count'.

#!/bin/sh

if test "$1" != "-f"; then
	git checkout master
	git pull
	sh count > time.dat
fi

DATE=$(tail -n 1 time.dat | cut -f 1 | awk -F- '{print $2,$1,$3}')
MAXY=$(awk 'BEGIN {max=0}; ($3 > max) {max=$3}; END {print max+50}' < time.dat)
# GNU date is powerful!
MAXX=$(date +%b-1-%Y --date='+2 months')

export GDFONTPATH=/usr/share/fonts/msttcorefonts/
cat << EOF | gnuplot > plot.png
set terminal png enhanced font "verdanab,20" size 1600,1200
#set terminal png enhanced transparent font "verdanab,14" size 1200,600
#set terminal svg enhanced font "verdanab,8" size 800,600

set title "OpenVZ team kernel patches progress as of ${DATE}"

unset xlabel
set xdata time
set timefmt "%b-%d-%Y"
set format x "%b\n%Y"
set grid xtics mxtics noytics

set xrange [ : "${MAXX}" ]
set yrange [ 0 : ${MAXY} ]
set ylabel "Number of patches from OpenVZ team,\n per kernel release, accepted into mainstream"

set border 3		# no lines at right and top
set xtics nomirror	# no tics at top
set ytics nomirror	# no tics at right

plot 'time.dat' using 1:3 with linespoints pt 6 ps 1 lw 2 lt 2 notitle, \
	''	using 1:3:2 with labels left offset 0,1 rotate notitle, \
	''	using 1:3:3 with labels left offset 0.7,0 notitle

EOF

File history

Click on a date/time to view the file as it appeared at that time.

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Date/TimeThumbnailDimensionsUserComment
12:08, 20 March 2011Thumbnail for version as of 12:08, 20 March 20111,600 × 1,200 (47 KB)Glic3rinu (talk | contribs)2.6.38 release
11:48, 2 August 2010Thumbnail for version as of 11:48, 2 August 20101,600 × 1,200 (45 KB)Glic3rinu (talk | contribs)2.6.35 released
17:54, 1 March 2010Thumbnail for version as of 17:54, 1 March 20101,600 × 1,200 (44 KB)Glic3rinu (talk | contribs)
17:52, 1 March 2010Thumbnail for version as of 17:52, 1 March 20101,600 × 1,200 (38 KB)Glic3rinu (talk | contribs)Reverted to version as of 08:50, 14 July 2008
01:59, 30 January 2010Thumbnail for version as of 01:59, 30 January 20101,600 × 1,200 (44 KB)Glic3rinu (talk | contribs)
08:50, 14 July 2008Thumbnail for version as of 08:50, 14 July 20081,600 × 1,200 (38 KB)Kir (talk | contribs)2.6.26 released
12:27, 5 June 2008Thumbnail for version as of 12:27, 5 June 20081,600 × 1,200 (39 KB)Kir (talk | contribs)v2.6.26-rc5
08:46, 19 May 2008Thumbnail for version as of 08:46, 19 May 20081,600 × 1,200 (40 KB)Kir (talk | contribs)
07:14, 4 May 2008Thumbnail for version as of 07:14, 4 May 20081,600 × 1,200 (39 KB)Kir (talk | contribs)Updated to include v2.6.26-rc1
10:15, 17 April 2008Thumbnail for version as of 10:15, 17 April 20081,600 × 1,200 (38 KB)Kir (talk | contribs)updated
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