[PATCH] scripts/phb-crystal-ball: add new PHB crystal ball

From: Luis R. Rodriguez
Date: Tue Aug 31 2010 - 21:43:15 EST

Tired of guestimating to your bosses when you think Linus will be
releaesing the next kernel? "Its done when its done" often does not work
and often for scheduling purposes we need at least a pretty rough estimate.

This adds support for the kernel for a PHB crystal ball exactly for
this purpose. It has a PHB threshold set to 3 which cannot be modified,
otherwise we should probably panic. You can modify the number of kernels
counted to alter the average hacking days. Below are a few examples.

The first output uses the objects of from history kernel in addition to
Linus' stable kernel, since Linus' tree only keeps track of history down
to 2.6.12. Only 2.6.x kernels are currently supported.

git://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git

Based on these estimates you can at least have a rough idea when
the 2.6.xy-rc1 would roughly be released, about 2 weeks after each release,
and can coordinate regresion testing to be scheduled around that time.

mcgrof@tux ~/wireless-testing (git::master)$ phb-crystal-ball
Kernel Begin-of-hacking - End-of-hacking Hacking-day--average
v2.6.1 2003-12-17 02:56:13 -0800 - 2004-01-08 06:57:32 -0800 22
v2.6.2 2004-01-08 06:57:32 -0800 - 2004-02-03 03:36:36 -0800 26
v2.6.3 2004-02-03 03:36:36 -0800 - 2004-02-17 03:52:37 -0800 14
v2.6.4 2004-02-17 03:52:37 -0800 - 2004-03-10 02:52:41 -0800 22
v2.6.5 2004-03-10 02:52:41 -0800 - 2004-04-03 03:34:07 -0800 24
v2.6.6 2004-04-03 03:34:07 -0800 - 2004-05-09 05:30:37 -0700 36
v2.6.7 2004-05-09 05:30:37 -0700 - 2004-06-15 08:17:47 -0700 37
v2.6.8 2004-06-15 08:17:47 -0700 - 2004-08-13 08:28:28 -0700 59
v2.6.9 2004-08-13 08:28:28 -0700 - 2004-10-17 21:50:06 -0700 65
v2.6.10 2004-10-17 21:50:06 -0700 - 2004-12-23 21:26:21 -0800 67
v2.6.12 2004-12-23 21:26:21 -0800 - 2005-06-17 12:48:29 -0700 176
v2.6.13 2005-06-17 12:48:29 -0700 - 2005-08-28 16:41:01 -0700 72
v2.6.14 2005-08-28 16:41:01 -0700 - 2005-10-27 17:02:08 -0700 60
v2.6.15 2005-10-27 17:02:08 -0700 - 2006-01-02 19:21:10 -0800 67
v2.6.16 2006-01-02 19:21:10 -0800 - 2006-03-19 21:53:29 -0800 76
v2.6.17 2006-03-19 21:53:29 -0800 - 2006-06-17 18:49:35 -0700 90
v2.6.18 2006-06-17 18:49:35 -0700 - 2006-09-19 20:42:06 -0700 94
v2.6.19 2006-09-19 20:42:06 -0700 - 2006-11-29 13:57:37 -0800 71
v2.6.20 2006-11-29 13:57:37 -0800 - 2007-02-04 10:44:54 -0800 67
v2.6.21 2007-02-04 10:44:54 -0800 - 2007-04-25 20:08:32 -0700 80
v2.6.22 2007-04-25 20:08:32 -0700 - 2007-07-08 16:32:17 -0700 74
v2.6.23 2007-07-08 16:32:17 -0700 - 2007-10-09 13:31:38 -0700 93
v2.6.24 2007-10-09 13:31:38 -0700 - 2008-01-24 14:58:37 -0800 107
v2.6.25 2008-01-24 14:58:37 -0800 - 2008-04-16 19:49:44 -0700 83
v2.6.26 2008-04-16 19:49:44 -0700 - 2008-07-13 14:51:29 -0700 88
v2.6.27 2008-07-13 14:51:29 -0700 - 2008-10-09 15:13:53 -0700 88
v2.6.28 2008-10-09 15:13:53 -0700 - 2008-12-24 15:26:37 -0800 76
v2.6.29 2008-12-24 15:26:37 -0800 - 2009-03-23 16:12:14 -0700 89
v2.6.30 2009-03-23 16:12:14 -0700 - 2009-06-09 20:05:27 -0700 78
v2.6.31 2009-06-09 20:05:27 -0700 - 2009-09-09 15:13:59 -0700 92
v2.6.32 2009-09-09 15:13:59 -0700 - 2009-12-02 19:51:21 -0800 84
v2.6.33 2009-12-02 19:51:21 -0800 - 2010-02-24 10:52:17 -0800 84
v2.6.34 2010-02-24 10:52:17 -0800 - 2010-05-16 14:17:36 -0700 81
v2.6.35 2010-05-16 14:17:36 -0700 - 2010-08-01 15:11:14 -0700 77

v2.6.36 release estimate based on the last 35 kernels: Sat Oct 9 15:11:14 PDT 2010
v2.6.37 release estimate based on the last 35 kernels: Fri Dec 17 14:11:14 PST 2010
v2.6.38 release estimate based on the last 35 kernels: Thu Feb 24 14:11:14 PST 2011

mcgrof@tux ~/wireless-testing (git::master)$ phb-crystal-ball -c 10
Kernel Begin-of-hacking - End-of-hacking Hacking-day--average
v2.6.27 2008-07-13 14:51:29 -0700 - 2008-10-09 15:13:53 -0700 88
v2.6.28 2008-10-09 15:13:53 -0700 - 2008-12-24 15:26:37 -0800 76
v2.6.29 2008-12-24 15:26:37 -0800 - 2009-03-23 16:12:14 -0700 89
v2.6.30 2009-03-23 16:12:14 -0700 - 2009-06-09 20:05:27 -0700 78
v2.6.31 2009-06-09 20:05:27 -0700 - 2009-09-09 15:13:59 -0700 92
v2.6.32 2009-09-09 15:13:59 -0700 - 2009-12-02 19:51:21 -0800 84
v2.6.33 2009-12-02 19:51:21 -0800 - 2010-02-24 10:52:17 -0800 84
v2.6.34 2010-02-24 10:52:17 -0800 - 2010-05-16 14:17:36 -0700 81
v2.6.35 2010-05-16 14:17:36 -0700 - 2010-08-01 15:11:14 -0700 77

v2.6.36 release estimate based on the last 10 kernels: Thu Oct 14 15:11:14 PDT 2010
v2.6.37 release estimate based on the last 10 kernels: Mon Dec 27 14:11:14 PST 2010
v2.6.38 release estimate based on the last 10 kernels: Fri Mar 11 14:11:14 PST 2011

mcgrof@tux ~/wireless-testing (git::master)$ phb-crystal-ball -c 3
Kernel Begin-of-hacking - End-of-hacking Hacking-day--average
v2.6.34 2010-02-24 10:52:17 -0800 - 2010-05-16 14:17:36 -0700 81
v2.6.35 2010-05-16 14:17:36 -0700 - 2010-08-01 15:11:14 -0700 77

v2.6.36 release estimate based on the last 3 kernels: Wed Sep 22 15:11:14 PDT 2010
v2.6.37 release estimate based on the last 3 kernels: Sat Nov 13 14:11:14 PST 2010
v2.6.38 release estimate based on the last 3 kernels: Tue Jan 4 14:11:14 PST 2011

Cc: Dan Tian <dan.tian@xxxxxxxxxxx>
Cc: Kevin Hayes <kevin@xxxxxxxxxxx>
Cc: David Miller <davem@xxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxx>
Cc: Luis R. Rodriguez <mcgrof@xxxxxxxxx>
Cc: Zhifeng Cai <zhifeng.cai@xxxxxxxxxxx>
Cc: Kathy Giori <kathy.giori@xxxxxxxxxxx>
Cc: Cliff Holden <cliff.holden@xxxxxxxxxxx>
Cc: John W. Linville <linville@xxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Charles Marker <charles.marker@xxxxxxxxxxx>
Cc: Bernadette Yetso <bernadette.yetso@xxxxxxxxxxx>
Cc: Satagopan Kanthadai <satagopan.kanthadai@xxxxxxxxxxx>
Cc: Senthilkumar Balasubramanian <senthilkumar.balasubramanian@xxxxxxxxxxx>
Signed-off-by: Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx>
---
scripts/phb-crystal-ball | 137 ++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 137 insertions(+), 0 deletions(-)
create mode 100755 scripts/phb-crystal-ball

diff --git a/scripts/phb-crystal-ball b/scripts/phb-crystal-ball
new file mode 100755
index 0000000..1ca6d90
--- /dev/null
+++ b/scripts/phb-crystal-ball
@@ -0,0 +1,137 @@
+#!/bin/bash
+# Copyright (c) 2010 Atheros Communications Inc.
+#
+# Written by: Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx>
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+# Tired of guestimating to your bosses when the next kernel will be released?
+# Yeah, me too! Hope it helps.
+
+# Date calulation stuff is based on:
+# http://www.unix.com/tips-tutorials/31944-simple-date-time-calulation-bash.html
+# Credit to ripat there
+date_to_stamp () {
+ date --utc --date "$1" +%s
+}
+
+stamp_to_date () {
+ date --utc --date "1970-01-01 $1 sec" "+%Y-%m-%d %T"
+}
+
+date_diff () {
+ case $1 in
+ -s) sec=1; shift;;
+ -m) sec=60; shift;;
+ -h) sec=3600; shift;;
+ -d) sec=86400; shift;;
+ *) sec=86400;;
+ esac
+ dte1=$(date_to_stamp $1)
+ dte2=$(date_to_stamp $2)
+ diffSec=$((dte2-dte1))
+ if ((diffSec < 0)); then abs=-1; else abs=1; fi
+ echo $((diffSec/sec*abs))
+}
+# End of date crap
+
+# Pretty colors
+GREEN="\033[01;32m"
+YELLOW="\033[01;33m"
+NORMAL="\033[00m"
+BLUE="\033[34m"
+RED="\033[31m"
+PURPLE="\033[35m"
+CYAN="\033[36m"
+UNDERLINE="\033[02m"
+
+usage() {
+ echo -en "Usage: ${GREEN}$0 ${NORMAL}[ ${CYAN}-c <num-kernels> ${NORMAL}]\n"
+}
+
+if [[ $# -ne 0 && $# -ne 2 ]]; then
+ usage
+ exit
+fi
+
+NUM_KERNELS=0
+
+if [[ $# -eq 2 ]]; then
+ if [[ $2 -lt 0 || $1 != "-c" ]]; then
+ usage
+ exit
+ fi
+ NUM_KERNELS=$2
+fi
+
+LIMIT=""
+
+# 2.6.11 and older are on the history kernel
+if [[ $NUM_KERNELS -ne 0 ]]; then
+ KERNELS=$(git tag -l| grep v2.6.| grep -v rc | perl -i -ne 'print if ( /v2.6.(\d+\d*)$/i ) ' | grep -v 2.6.11 | grep -v "-" | sort --sort=version | tail -${NUM_KERNELS})
+else
+ KERNELS=$(git tag -l| grep v2.6.| grep -v rc | perl -i -ne 'print if ( /v2.6.(\d+\d*)$/i ) ' | grep -v 2.6.11 | grep -v "-" | sort --sort=version)
+fi
+
+LAST_DATE=""
+KERNEL_COUNT=0
+KERNEL_HACKING_DAYS=0
+
+echo -en "${GREEN}Kernel\t${YELLOW} Begin-of-hacking ${NORMAL} - ${YELLOW} End-of-hacking \t${CYAN} Hacking-day-average\n"
+
+for i in $KERNELS; do
+ # Relies on the tag date, note the commit date
+ TAG_DATE=$(git log -2 --pretty=format:%ai $i | head -1)
+
+ if [[ $LAST_DATE = "" ]]; then
+ LAST_DATE="$TAG_DATE"
+ let COUNT=$COUNT+1
+ continue
+ fi
+
+ DAYS=$(date_diff -d "$LAST_DATE" "$TAG_DATE")
+
+ echo -en "${GREEN}$i \t${YELLOW}${LAST_DATE}${NORMAL} - ${YELLOW}${TAG_DATE}\t${CYAN} ${DAYS}\n"
+
+ LAST_DATE="$TAG_DATE"
+ LAST_KERNEL=$(echo $i | sed -e 's|v2.6.||')
+ let COUNT=$COUNT+1
+ let KERNEL_HACKING_DAYS=$KERNEL_HACKING_DAYS+$DAYS
+done
+
+if [[ $LAST_DATE = "" ]]; then
+ echo -en "Not enough kernels"
+fi
+
+echo -en "\n"
+
+# We round off the minutes, etc since date doesn't compute floating point days
+AVERAGE_HACKING_DAYS=$(($KERNEL_HACKING_DAYS / $COUNT))
+
+let NEXT=$LAST_KERNEL+1
+
+
+# http://en.wikipedia.org/wiki/Pointy-haired_Boss
+PHB_TOLERANCE=3
+PHB_LEVEL=0
+
+while [[ $PHB_LEVEL -lt $PHB_TOLERANCE ]]; do
+ PHB_CRYSTAL_BALL=$(date --date "$LAST_DATE +$AVERAGE_HACKING_DAYS days")
+
+ echo -en "${RED}v2.6.${NEXT} ${NORMAL}release estimate based on the "
+ echo -en "last ${GREEN}$COUNT ${NORMAL}kernels: ${CYAN}$PHB_CRYSTAL_BALL${NORMAL}\n"
+ LAST_DATE="$PHB_CRYSTAL_BALL"
+
+ let PHB_LEVEL=$PHB_LEVEL+1
+ let NEXT=$NEXT+1
+done
--
1.7.0.4

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