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authorEdwin Groothuis <edwin@FreeBSD.org>2008-09-28 10:13:11 +0000
committerEdwin Groothuis <edwin@FreeBSD.org>2008-09-28 10:13:11 +0000
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tree786fa1fbb17c69aa06408624ed3ee94be63be396 /README
parent3e0c556084482bdb8cc32d03a1b57ecd45eb8947 (diff)
downloadsrc-c1dc0a1745ca8959fc4ce61ce026e2a83984c13e.tar.gz
src-c1dc0a1745ca8959fc4ce61ce026e2a83984c13e.zip
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Notes
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+ TOP
+ Version 3.5
+
+ William LeFebvre
+ and a cast of dozens
+
+
+If you do not want to read this entire file, then at least read
+the section at the end entitled "KNOWN PROBLEMS".
+
+If you are having any problems getting top to work, please read the
+file "FAQ" *before* contacting me. Thank you.
+
+"top" is a program that will give continual reports about the state of
+the system, including a list of the top cpu using processes. Version 3
+of "top" has three primary design goals: provide an accurate snapshot of
+the system and process state, not be one of the top processes itself, be
+as portable as possible.
+
+Version 3 has many bug fixes from version 2.5, and it has also been
+reorganized in a major way to make it easy to port to other platforms.
+All system dependent code is now contained in one file.
+
+Top now includes a configuration script called "Configure". It helps
+the installer choose the correct parameters for this particular
+installation. This script MUST be run before attempting to compile top.
+
+Top requires read access to the memory files "/dev/kmem" and "/dev/mem"
+as well as the system image "/vmunix". Some installations have these
+files protected from general access. These sites would have to install
+this program in the same way that programs such as "ps" are installed.
+In addition, on those Unix variants that support the proc filesystem
+(such as SVR4 and Solaris 2), top requires read access to all the files
+in /proc: typically dictating that top be installed setuid to root.
+
+CAVEAT: version 3 of top has internal commands that kill and renice
+processes. Although I have taken steps to insure that top makes
+appropriate checks with these commands, I cannot guarantee that these
+internal commands are totally secure. IF YOU INSTALL top as a SETUID
+program, you do so AT YOUR OWN RISK! I realize that some operating
+systems will require top to run setuid, and I will do everything I can
+to make sure that top is a secure setuid program.
+
+Configure will ask you to input values for certain parameters. Before
+each parameter, Configure will display a description of what the
+parameter does. Read the description and choose an appropriate value.
+Sometimes a default will appear in brackets. Typing just return will
+choose the default.
+
+System support now takes the form of "modules". Adding support for
+a different architecture requires only adding a module. Configure
+asks which module to use when it is configuring top. See the file
+"Porting" for a description of how to write your own module.
+
+To compile and install "top", read the file "INSTALL" and follow the
+directions and advice contained therein.
+
+Once you have created a binary for one particular type of machine, you
+can reconfigure for another type with "./Configure modulename" where
+"modulename" is replaced with the appropriate module name. All other
+parameter values are kept the same. Note that in some cases this may
+not be appropriate.
+
+If you make any kind of change to "top" that you feel would be
+beneficial to others who use this program, or if you find and fix a bug,
+please send me the change.
+
+Be sure to read the FAQ enclosed with the distrubution. It contains
+answers to the most commonly asked questions about the configuration,
+installation, and operation of top.
+
+
+AVAILABILITY
+
+The latest version of "top" is now being made available via anonymous
+FTP from the host "ftp.groupsys.com" in the directory "/pub/top".
+Additional modules will be made available in the directory
+"/pub/top/m". The site "eecs.nwu.edu" will continue to house copies
+of the distribution as well.
+
+Here are HTML links for the four best "top" archive sites:
+
+<A HREF="ftp://ftp.groupsys.com/pub/top">Top archive (groupsys.com)</A>
+<A HREF="ftp://eecs.nwu.edu/pub/top">Top archive (eecs.nwu.edu)</A>
+<A HREF="ftp://pharos.dgim.doc.ca/packages/top"> Top mirror (dgim.doc.ca)</A>
+<A HREF="ftp://uiarchive.uiuc.edu/pub/packages/top/">Top mirror (uiuc.edu)</A>
+
+New releases will be posted to comp.sources.unix as they become
+available. Sites which arhive that newsgroup will also contain copies
+of the distribution.
+
+Announcements about availability will be made to the mailing list
+"top-announce@groupsys.com". This is an open list maintained by
+majordomo. To join the list, send a message containing the word
+"subscribe" to "top-announce-request@groupsys.com". Addresses of
+subscribers to this list are kept confidential and will never be used
+for any purpose other than as recipients of announements concerning
+this software.
+
+
+KNOWN PROBLEMS:
+
+Gnu CC
+
+Compiling via Gnu CC continued to be the source of most of the
+questions I receive. By far the most common mistake made by those
+attempting to compile top with Gnu CC is out of date include files.
+When the operating system is upgraded, the include files that are part
+of the gcc package MUST also be updated. Gcc maintains its own
+include files. Even a minor OS upgrade can involve changes to some of
+the kernel's internal data structures, which are defined in include
+files in "sys". Top is very sensitive to these changes. If you are
+compiling with gcc and experience any sort of strange problems, please
+make sure the include files you are using are up to date BEFORE
+sending me a bug report. Look in the gcc source distribution for the
+shell script "fixincludes".
+
+HP/UX 10.10
+
+In their infinite wisdom, the folks at HP have decided that mere mortals
+such as you and I don't need to know what the kernel's proc structure looks
+like. To that end, they have removed all useful content from the include
+file <sys/proc.h> in version 10.10. As a result, top will not compile
+under 10.10. What HP is trying to accomplish with this move is to force
+iconoclasts such as myself to use "pstat" for collecting all process
+information. I have no immediate solution for this problem, but hope to
+obtain a sufficiently complete definition of "struct proc" at some point in
+the near future. Stay tuned.
+
+DIGITAL UNIX 4.0 (DECOSF/1 V4.0)
+
+A user has reported that idle processes are not displayed regardless
+of the flags used when invoking top. We have not had time to track
+this problem down.
+
+DECOSF/1 V3.0
+
+There is a bug either in the module, in utils.c, or in DEC's optimizer that
+is tickled by the decosf1 module when compiled under V3.0 (and perhaps
+earlier versions). Top compiled using DEC's compiler with optimization
+will consistently produce a segmentation fault (in format_next_process
+while calling sprintf). To work around this problem, either compile top
+with gcc or turn off optimization (compile without -O). We think that
+one of the bugs fixed in utils.c fixed this problem as well, but we are
+not certain.
+
+
+System V R 4.2
+
+Load average and memory displays do not work. The problem has been
+traced down to a potential bug in the "mem" driver. The author
+of the svr42 module is working on a fix.
+
+
+
+GRATITUDE
+
+My perpetual thanks to all the people who have helped me support top
+on so many platforms. Without these people, top would not be what it
+is. Here is a partial list of contributors and other individuals.
+
+ Robert Boucher <boucher@sofkin.ca>
+ Marc Cohen <marc@aai.com>
+ David Cutter <dpc@grail.com>
+ Casper Dik <Casper.Dik@Sun.COM>
+ Charles Hedrick <hedrick@geneva.rutgers.edu>
+ Andrew Herbert <andrew@werple.apana.org.au>
+ Jeff Janvrin <jeff.janvrin@columbiasc.ncr.com>
+ Torsten Kasch <torsten@techfak.uni-bielefeld.de>
+ Petri Kutvonen <kutvonen@cs.helsinki.fi>
+ William L. Jones <jones@chpc>
+ Tim Pugh <tpugh@oce.orst.edu>
+ Steve Scherf <scherf@swdc.stratus.com>
+ Phillip Wu <pwu01@qantek.com.au>
+
+(My apologies if I missed anyone.)
+
+
+AUTHOR
+
+ William LeFebvre
+ Group sys Consulting
+ wnl@groupsys.com
+
+
+ U.S. Mail address:
+ William LeFebvre
+ Group sys Consulting
+ 11585 Jones Bridge Road
+ Suite 420-139
+ Alpharetta, GA 30022
+ (770) 813-3224