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[Posted to the Gnome Mailing List on Fri Aug 21 1998]
About this release:
------------------
LibGTop 0.25 is a stable release.
Of cause it has its bug like any software has, I'm planning
to fix as many bugs as possible in _this_ release and then
re-release it as libgtop-0.26 or even libgtop-0.30.
Especially portings to new operating systems should be made
in this release.
This also means that we can safely use this version of LibGTop
all over the GNOME project.
Currently LibGTop-Apps is still a little bit under development -
especially the LibGTop-Apps GTop does not yet have the full
functionallity of the real GTop.
We should test this extensively and then decide whether to continue
with the `libgtop-apps' module or whether to merge all its code
back into the modules it came from. I'd like to hear some comments
about this from you !
Please look at the release notes below for more details about this
release.
Where to get the sources
------------------------
The sources can be found at:
ftp://ftp.home-of-linux.org/pub/
Tarballs:
libgtop-0.25.0.tar.gz
libgtop-apps-0.25.0.tar.gz
Source RPM:
libgtop-0.25.0-REL.src.rpm
libgtop-apps-0.25.0-REL.src.rpm
Binary RPMS:
libgtop-0.25.0-REL.i386.rpm
libgtop-devel-0.25.0-REL.i386.rpm
libgtop-examples-0.25.0-REL.i386.rpm
libgtop-apps-0.25.0-REL.i386.rpm
There is some little problem with the binary RPMS of `libgtop-apps':
Most of its files will conflict with ones from `gnome-core' and `gnome-utils',
so you'll need to use the `--force' parameter to install it.
Getting the sources from CVS:
----------------------------
You can also fetch the sources from the GNOME CVS tree
(see http://www.gnome.org/ for details).
To get the latest sources:
$ cvs checkout libgtop
$ cvs checkout libgtop-apps
To get the sources of *this* release:
$ cvs checkout -r LIBGTOP_0_25 libgtop
$ cvs checkout -r LIBGTOP_0_25 libgtop-apps
To get the sources of this release with all bug-fixes applied:
$ cvs checkout -r LIBGTOP_0_25_PATCHES libgtop
$ cvs checkout -r LIBGTOP_0_25_PATCHES libgtop-apps
To get a patch to apply to the tarballs to get all bug-fixes:
$ cvs rdiff -r LIBGTOP_0_25 -r LIBGTOP_0_25_PATCHES libgtop
$ cvs rdiff -r LIBGTOP_0_25 -r LIBGTOP_0_25_PATCHES libgtop-apps
[Note for people having write access to the GNOME CVS tree:
Please apply bug fixes to the `LIBGTOP_0_25_PATCHES' branch and
merge them into the main trunk.
After merging, please re-tag the branch `libgtop_0_25_after_merge'.
This will help us to re-release this package when all bugs are
fixed.
]
RELEASE NOTES FOR LIBGTOP 0.25 STABLE
=====================================
OVERVIEW
--------
LibGTop is a library that read information about processes and the running
systems. This information include:
General System Information
cpu - CPU Usage
mem - Memory Usage
swap - Swap Usage (including paging activity)
loadavg - Load average (including nr_running, nr_tasks, last_pid)
uptime - Uptime and Idle time, can be calculated from CPU usage
SYS V IPC Limits:
shm_limits - Shared Memory Limits
msg_limits - Message Queue Limits
sem_limits - Semaphore Set Limits
Process List:
proclist - List of processes
Process information:
proc_state - cmd, state, uid, gid
proc_uid - uid,euid,gid,egid,pid,ppid,pgrp
session,tty,tpgid,priority,nice
proc_mem - size,vsize,resident,share,rss,rss_rlim
proc_time - start_time,rtime,utime,stime,cutime,cstime
timeout,it_real_value,frequency
proc_signal - signal,blocked,sigignore,sigcatch
proc_kernel - k_flags,min_flt,maj_flt,cmin_flt,cmaj_flt
kstk_esp,kstk_eip,nwchan,wchan
proc_segment - text_rss,shlib_rss,data_rss,stack_rss,dirty_size
start_code,end_code,start_stack
Process maps:
proc_map - Process map (/proc/<pid>/maps under Linux)
File system usage:
mountlist - List of currently mounted filesystems
fsusage - File system usage
PORTABILITY:
-----------
LibGtop is designed to be as portable as possible. None of the functions
and retrieved information should be specific to a specific operating
system. So you only need to port the system dependent part of the library
to a new system and all application programs can then use libgtop on this
new system.
CLIENT/SERVER MODEL:
-------------------
Some systems like DEC OSF/1 or BSD require special priviledges for the calling
proces to fetch the required information (SUID root/SGID kmem). To solve this
problem, I designed a client/server model which makes a call to a SUID/SGID
server which fetches the required information whenever it is required. This
server is only called for features that really require priviledges, otherwise
the sysdeps code is called directory (every user can get the CPU usage on
DEC OSF/1, but only root can get information about processes other than the
current one).
There is also some kind of daemon which can be used to fetch information from
remote systems (still experimental). This daemon normally runs as nobody and
calls the SUID/SGID itself when needed.
GNOME APPLETS:
--------------
There are some applets and applications which already use LibGTop. They can
be found in the `libgtop-apps' module in the GNOME CVS tree:
* Applets: cpuload, cpumemusage - they need LibGTop to get their information
on all systems other than Linux.
* Applets: diskusage - just uses the mountlist/fsusage features of LibGTop,
the one in gnome-core also works on other systems.
* Applets: multiload - I enhanced the cpuload applet a little bit, it is
now a multi applet and can display CPU, Memory and
Swap usages.
GTOP:
----
This cool GNOME app has been ported to use LibGTop. It can be found in
`libgtop-apps/gtop' in the GNOME CVS tree.
You can now use nearly the full functionality of GTop on FreeBSD !
PLATTFORM SPECIFIC NOTES FOR LINUX:
==================================
Under Linux, LibGTop should work without problems and read everything
from /proc.
There is also an experimental kernel interface to read this information
directly from the kernel with a system call - but this is still experimental
and not well tested while I made this release.
PLATTFORM SPECIFIC NOTES FOR FREEBSD:
====================================
LibGTop should now work under FreeBSD and give you the full functionality
of GTop.
There are a few caveats:
* You need to manually make the `$(prefix)/bin/libgtop_server' SGID to kmem
after installation and mount the /proc filesystem of FreeBSD
(/proc/<pid>/mem is used withing kvm_uread ()).
* To get the filenames of the process maps displayed in GTop, you need to
configure with the `--with-libgtop-inodedb' option (you need GDBM for this
to work).
* You have then to create an inode database which is used to look up to
filenames. This is done using the `mkinodedb' program which comes along
with libgtop.
See the file src/inodedb/README for details:
The `mkinodedb' program which is build in this directory takes two
command line arguments: the full pathname of the database to be created
and the name of a configuration file consisting of directory and file names
each on a line by itself - see `/etc/ld.so.conf' for an example.
Putting a directory name in this file means all regular files found in this
directory are included in the database, but it will not recursively descend
into subdirectories (for instance, we want everythink in `/usr/lib' but not
every single file in `/usr/lib/sgml'). You can also use filenames to include
a single file.
Have fun,
Martin <martin@home-of-linux.org>
|
