Difference between revisions of "File:Kernel patches stats.png"

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Revision as of 01:59, 30 January 2010


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
}

# What is the latest kernel patch number (i.e. x in 2.6.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 v2.6.$latest HEAD)
	count_rc=$(count_patches v2.6.$latest $last_rc)
	if test $count_head -gt $((count_rc+much_more)); then
		HEAD="HEAD   "
	fi
fi

# We start from 2.6.12 -- the first kernel available in git
for f in $(seq 13 $((latest+1))); do
	v1=v2.6.$((f-1))
	d1=$(get_tag_date $v1)
	if [ $f -gt $latest ]; then
		v2=$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'

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

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Date/TimeThumbnailDimensionsUserComment
current05:47, 28 March 2022Thumbnail for version as of 05:47, 28 March 20221,600 × 1,200 (52 KB)Vvs (talk | contribs)v5.17+
15:00, 8 May 2021Thumbnail for version as of 15:00, 8 May 20211,600 × 1,200 (49 KB)Vvs (talk | contribs)v5.12+
13:27, 3 May 2020Thumbnail for version as of 13:27, 3 May 20201,600 × 1,200 (50 KB)Vvs (talk | contribs)3.Mai 2020
10:21, 31 January 2020Thumbnail for version as of 10:21, 31 January 20201,600 × 1,200 (49 KB)Vvs (talk | contribs)v5.5+
07:36, 30 October 2019Thumbnail for version as of 07:36, 30 October 20191,600 × 1,200 (49 KB)Vvs (talk | contribs)v5.3+
07:16, 23 August 2019Thumbnail for version as of 07:16, 23 August 20191,600 × 1,200 (49 KB)Vvs (talk | contribs)v5.2+
06:26, 27 May 2019Thumbnail for version as of 06:26, 27 May 20191,600 × 1,200 (49 KB)Vvs (talk | contribs)26 may 2019, v5.2-rc2
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11:10, 30 November 2018Thumbnail for version as of 11:10, 30 November 20181,600 × 1,200 (47 KB)Vvs (talk | contribs)
11:18, 27 August 2018Thumbnail for version as of 11:18, 27 August 20181,600 × 1,200 (48 KB)Vvs (talk | contribs)4.18+
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