[LTP] [Patch 1/10]Patch to integrate kernbench to LTP to test sched_mc=2

Poornima Nayak
2009-06-30T14:57:16Z

[Patch 1/10]Patch to integrate kernbench to LTP to test sched_mc=2
To verify CPU consolidation when sched_mc=2 we need kernbench. Hence integrating it
in LTP.

Signed-off-by: poornima nayak <mpnayak@linux.vnet.ibm.com>

diff -uprN ltp_orig/utils/benchmark/kernbench-0.42/COPYING ltp_patched/utils/benchmark/kernbench-0.42/COPYING
--- ltp_orig/utils/benchmark/kernbench-0.42/COPYING 1970-01-01 05:30:00.000000000 +0530
+++ ltp_patched/utils/benchmark/kernbench-0.42/COPYING 2009-06-30 15:05:39.000000000 +0530
@@ -0,0 +1,340 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it. (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.) You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+ To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have. You must make sure that they, too, receive or can get the
+source code. And you must show them these terms so they know their
+rights.
+
+ We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+ Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software. If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+ Finally, any free program is threatened constantly by software
+patents. We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary. To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+ The precise terms and conditions for copying, distribution and
+modification follow.
+\f
+ GNU GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License. The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language. (Hereinafter, translation is included without limitation in
+the term "modification".) Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope. The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+ 1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+ 2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+ a) You must cause the modified files to carry prominent notices
+ stating that you changed the files and the date of any change.
+
+ b) You must cause any work that you distribute or publish, that in
+ whole or in part contains or is derived from the Program or any
+ part thereof, to be licensed as a whole at no charge to all third
+ parties under the terms of this License.
+
+ c) If the modified program normally reads commands interactively
+ when run, you must cause it, when started running for such
+ interactive use in the most ordinary way, to print or display an
+ announcement including an appropriate copyright notice and a
+ notice that there is no warranty (or else, saying that you provide
+ a warranty) and that users may redistribute the program under
+ these conditions, and telling the user how to view a copy of this
+ License. (Exception: if the Program itself is interactive but
+ does not normally print such an announcement, your work based on
+ the Program is not required to print an announcement.)
+\f
+These requirements apply to the modified work as a whole. If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works. But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+ 3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+ a) Accompany it with the complete corresponding machine-readable
+ source code, which must be distributed under the terms of Sections
+ 1 and 2 above on a medium customarily used for software interchange; or,
+
+ b) Accompany it with a written offer, valid for at least three
+ years, to give any third party, for a charge no more than your
+ cost of physically performing source distribution, a complete
+ machine-readable copy of the corresponding source code, to be
+ distributed under the terms of Sections 1 and 2 above on a medium
+ customarily used for software interchange; or,
+
+ c) Accompany it with the information you received as to the offer
+ to distribute corresponding source code. (This alternative is
+ allowed only for noncommercial distribution and only if you
+ received the program in object code or executable form with such
+ an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it. For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable. However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+\f
+ 4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License. Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+ 5. You are not required to accept this License, since you have not
+signed it. However, nothing else grants you permission to modify or
+distribute the Program or its derivative works. These actions are
+prohibited by law if you do not accept this License. Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+ 6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions. You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+ 7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all. For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices. Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+\f
+ 8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded. In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+ 9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation. If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+ 10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission. For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this. Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+ NO WARRANTY
+
+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+ 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+\f
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+ Gnomovision version 69, Copyright (C) year name of author
+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+ `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+ <signature of Ty Coon>, 1 April 1989
+ Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Library General
+Public License instead of this License.
diff -uprN ltp_orig/utils/benchmark/kernbench-0.42/kernbench ltp_patched/utils/benchmark/kernbench-0.42/kernbench
--- ltp_orig/utils/benchmark/kernbench-0.42/kernbench 1970-01-01 05:30:00.000000000 +0530
+++ ltp_patched/utils/benchmark/kernbench-0.42/kernbench 2009-06-30 15:05:39.000000000 +0530
@@ -0,0 +1,233 @@
+#!/bin/sh
+# kernbench by Con Kolivas <kernbench@kolivas.org>
+# based on a benchmark by Martin J. Bligh
+trap 'echo "ABORTING";exit' 1 2 15
+
+VERSION=0.42
+
+num_runs=5
+single_runs=0
+half_runs=1
+opti_runs=1
+max_runs=1
+fast_run=0
+
+while getopts vsHOMn:o:hf i
+do
+ case $i in
+ h) echo "kernbench v$VERSION by Con Kolivas <kernbench@kolivas.org>"
+ echo "Usage:"
+ echo "kernbench [-n runs] [-o jobs] [-s] [-H] [-O] [-M] [-h] [-v]"
+ echo "n : number of times to perform benchmark (default 5)"
+ echo "o : number of jobs for optimal run (default 4 * cpu)"
+ echo "s : perform single threaded runs (default don't)"
+ echo "H : don't perform half load runs (default do)"
+ echo "O : don't perform optimal load runs (default do)"
+ echo "M : don't perform maximal load runs (default do)"
+ echo "f : fast run"
+ echo "h : print this help"
+ echo "v : print version number"
+ exit ;;
+ v) echo "kernbench Version $VERSION by Con Kolivas <kernbench@kolivas.org>" ; exit ;;
+ n) nruns=$OPTARG ;;
+ o) optijobs=$OPTARG ;;
+ s) single_runs=1 ;;
+ H) half_runs=0 ;;
+ O) opti_runs=0 ;;
+ M) max_runs=0 ;;
+ f) fast_run=1 ;;
+ esac
+done
+
+if [[ ! -f include/linux/kernel.h ]] ; then
+ echo "No kernel source found; exiting"
+ exit
+fi
+
+for i in time awk yes date
+do
+ iname=`which $i`
+ if [[ ! -a $iname ]] ; then
+ echo "$i not found in path, please install it; exiting"
+ exit
+ fi
+done
+
+time=`which time`
+
+if [[ $nruns -gt 0 ]] ; then
+ num_runs=$nruns
+elif [[ $fast_run -eq 1 ]]; then
+ echo "Dropping to 3 runs for fast run"
+ num_runs=3
+fi
+
+if (($num_runs < 1)) ; then
+ echo "Nothing to do; exiting"
+ exit
+fi
+
+if (($num_runs > 10)) ; then
+ echo "Are you crazy? trimming number of runs to 10"
+ num_runs=10
+fi
+
+if [[ ! -d /proc ]] ; then
+ echo "Can't find proc filesystem; exiting"
+ exit
+fi
+
+mem=`awk '/MemTotal/ {print $2}' /proc/meminfo`
+if [[ $mem -lt 4000000 && $max_runs -gt 0 ]] ; then
+ echo Less than 4Gb ram detected!
+ echo Maximal loads will not measure cpu throughput and may cause a swapstorm!
+ echo If you did not plan this, -M flag is recommended to bypass maximal load.
+fi
+
+(( single_runs *= $num_runs ))
+(( half_runs *= $num_runs ))
+(( opti_runs *= $num_runs ))
+(( max_runs *= $num_runs ))
+
+cpus=`grep -c ^processor /proc/cpuinfo`
+echo $cpus cpus found
+echo Cleaning source tree...
+make clean > /dev/null 2>&1
+
+if [[ $fast_run -eq 0 ]] ; then
+ echo Caching kernel source in ram...
+ for i in `find -type f`
+ do
+ cat $i > /dev/null
+ done
+fi
+
+if [[ ! -f .config ]] ; then
+ echo No old config found, using defconfig
+ echo Making mrproper
+ make mrproper > /dev/null 2>&1
+ echo Making defconfig...
+ make defconfig > /dev/null 2>&1
+else
+ echo Making oldconfig...
+ yes "" | make oldconfig > /dev/null 2>&1
+fi
+
+halfjobs=$(( $cpus / 2 ))
+optijobs=${optijobs:=$(( $cpus * 4 ))}
+
+if [[ $halfjobs -lt 2 ]] ; then
+ echo "Half load is no greater than single; disabling"
+ half_runs=0
+elif [[ $halfjobs -eq 2 ]] ; then
+ echo "Half load is 2 jobs, changing to 3 as a kernel compile won't guarantee 2 jobs"
+ halfjobs=3
+fi
+
+echo Kernel `uname -r`
+echo Performing $num_runs runs of
+if [[ $single_runs -gt 0 ]] ; then
+ echo make
+fi
+if [[ $half_runs -gt 0 ]] ; then
+ echo make -j $halfjobs
+fi
+if [[ $opti_runs -gt 0 ]] ; then
+ echo make -j $optijobs
+fi
+if [[ $max_runs -gt 0 ]] ; then
+ echo make -j
+fi
+echo
+
+echo All data logged to kernbench.log
+
+if [[ $fast_run -eq 0 ]] ; then
+ echo Warmup run...
+ make -j $optijobs > /dev/null 2>&1
+fi
+
+date >> kernbench.log
+uname -r >> kernbench.log
+
+add_data_point()
+{
+ echo $@ | awk '{printf "%.6f %.6f %d", $1 + $2, $1 * $1 + $3, $4 + 1}'
+}
+
+show_statistics()
+{
+ case $3 in
+ 0)
+ echo "No data"
+ ;;
+ 1)
+ echo $1
+ ;;
+ *)
+ avg=`echo $1 $3 | awk '{print $1 / $2}'`
+ var=`echo $1 $2 $3 | awk '{print ($2 - ($1 * $1) / $3) / ($3 - 1)}'`
+ sdev=`echo $var | awk '{print $1^0.5}'`
+ echo "$avg ($sdev)"
+ ;;
+ esac
+}
+
+do_log()
+{
+ echo "Average $runname Run (std deviation):" > templog
+ echo Elapsed Time `show_statistics $temp_elapsed` >> templog
+ echo User Time `show_statistics $temp_user` >> templog
+ echo System Time `show_statistics $temp_sys` >> templog
+ echo Percent CPU `show_statistics $temp_percent` >> templog
+ echo Context Switches `show_statistics $temp_ctx` >> templog
+ echo Sleeps `show_statistics $temp_sleeps` >> templog
+ echo >> templog
+ cat templog
+ cat templog >> kernbench.log
+}
+
+do_runs()
+{
+ temp_elapsed="a"
+ for (( i=1 ; i <= temp_runs ; i++ ))
+ do
+ echo $runname run number $i...
+ make clean > /dev/null 2>&1
+ sync
+ if [[ $fast_run -eq 0 ]] ; then
+ sleep 5
+ fi
+ $time -f "%e %U %S %P %c %w" -o timelog make -j $tempjobs > /dev/null 2>&1
+ read elapsed_time user_time sys_time percent ctx sleeps <timelog
+ temp_elapsed=`add_data_point $elapsed_time $temp_elapsed`
+ temp_user=`add_data_point $user_time $temp_user`
+ temp_sys=`add_data_point $sys_time $temp_sys`
+ temp_percent=`add_data_point $percent $temp_percent`
+ temp_ctx=`add_data_point $ctx $temp_ctx`
+ temp_sleeps=`add_data_point $sleeps $temp_sleeps`
+ done
+ if [[ $temp_runs -ne 0 ]] ; then
+ do_log
+ fi
+}
+
+temp_runs=$single_runs
+tempjobs=1
+runname="Single threaded"
+do_runs
+
+temp_runs=$half_runs
+tempjobs=$halfjobs
+runname="Half load -j $halfjobs"
+do_runs
+
+temp_runs=$opti_runs
+tempjobs=$optijobs
+runname="Optimal load -j $optijobs"
+do_runs
+
+temp_runs=$max_runs
+tempjobs=""
+runname="Maximal load -j"
+do_runs
diff -uprN ltp_orig/utils/benchmark/kernbench-0.42/Makefile ltp_patched/utils/benchmark/kernbench-0.42/Makefile
--- ltp_orig/utils/benchmark/kernbench-0.42/Makefile 1970-01-01 05:30:00.000000000 +0530
+++ ltp_patched/utils/benchmark/kernbench-0.42/Makefile 2009-06-30 15:05:39.000000000 +0530
@@ -0,0 +1,8 @@
+all:
+
+install:
+ chmod ugo+x kernbench
+
+configure:
+
+clean:
diff -uprN ltp_orig/utils/benchmark/kernbench-0.42/README ltp_patched/utils/benchmark/kernbench-0.42/README
--- ltp_orig/utils/benchmark/kernbench-0.42/README 1970-01-01 05:30:00.000000000 +0530
+++ ltp_patched/utils/benchmark/kernbench-0.42/README 2009-06-30 15:05:39.000000000 +0530
@@ -0,0 +1,81 @@
+Kernbench v0.42
+
+
+What is this?
+
+This is a cpu throughput benchmark originally devised and used by Martin J.
+Bligh. It is designed to compare kernels on the same machine, or to compare
+hardware. To compare hardware you need to be running the same architecture
+machines (eg i386), the same userspace binaries and run kernbench on the same
+kernel source tree.
+
+It runs a kernel at various numbers of concurrent jobs: 1/2 number of cpus,
+optimal (default is 4xnumber of cpus) and maximal job count. Optionally it can
+also run single threaded. It then prints out a number of useful statistics
+for the average of each group of runs and logs them to kernbench.log
+
+You need more than 2Gb of ram for this to be a true throughput benchmark or
+else you will get swapstorms.
+
+Ideally it should be run in single user mode on a non-journalled filesystem.
+To compare results it should always be run in the same kernel tree.
+
+
+How do I use it?
+
+You need a kernel tree (any 2.6 will do) and the applications 'time', 'awk',
+'date' and 'yes' installed. 'time' is different to the builtin time used by
+BASH and has more information desired for this benchmark.
+
+Simply cd into the kernel tree directory and type
+
+/path/to/kernbench
+
+
+Options
+
+kernbench [-n runs] [-o jobs] [-s] [-H] [-O] [-M] [-h] [-v]
+n : number of times to perform benchmark (default 5)
+o : number of jobs for optimal run (default 4 * cpu)
+s : perform single threaded runs (default don't)
+H : don't perform half load runs (default do)
+O : don't perform optimal load runs (default do)
+M : don't perform maximal load runs (default do)
+f : fast run
+h : print this help
+v : print version number
+
+
+Changelog:
+v0.42 Fixed incorrect counting of cpus (thanks Flynn Marquardt)
+ Changed -j to at least 4GB ram.
+
+v0.41 Fixed make oldconfig
+
+v0.40 Made all runs use the oldconfig if it exists. Changed to only do one
+ warmup run before all the benchmarks. Added logging to kernbench.log
+ Cleaned up the code substantially to reuse code where possible.
+ Added standard deviation statistics courtesy of Peter Williams
+
+v0.30 Added fast run option which bypasses caching, warmup and tree
+ preparation and drops number of runs to 3. Modified half loads to
+ detect -j2 and change to -j3. Added syncs. Improved warnings and
+ messages.
+
+v0.20 Change to average of runs, add options to choose which runs to perform
+ remove single threaded run from defaults, do warmup run, lots more
+ sanity checks, drop meaningless runs, add a few warnings, remove fudge
+ factor from no. of jobs.
+
+v0.11 First public release
+
+
+Thanks: M. Bligh for ideas. Others for help with magic incantations to get
+ BASH to work.
+
+
+Con Kolivas <kernbench@kolivas.org>
+Mon Jun 18 18:59:24 2007
+
+License:
+GPL of course. Read COPYING included in this tarball.