Jim Warner [Sat, 30 Nov 2013 06:00:00 +0000 (00:00 -0600)]
top: follow usual name conventions for global variable
A recent change involving a one cycle stderr redirect,
to handle a libnuma potential transgression, failed to
follow normal global variable naming conventions. This
patch will capitalize the 1st letter of 'Stderr_save'.
Jim Warner [Fri, 29 Nov 2013 06:00:00 +0000 (00:00 -0600)]
top: do not lie about purported alphabetical orderings
Excluding those special X_XON/X_XOF enums, which might
not even be present, restore strict collating order of
all the case labels in the task_show switch statement.
Also, adjust a few sort callbacks for the same reason.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jaromir Capik [Mon, 25 Nov 2013 16:39:14 +0000 (17:39 +0100)]
vmstat: support for time stolen from virtual machines
Surprisingly the code for the 'st' column was added in the past,
but wasn't enabled. The vmstat manual already contains the 'st'
column and this commit finally enables the feature.
Jaromir Capik [Mon, 25 Nov 2013 15:56:10 +0000 (16:56 +0100)]
vmstat: -w switch for wider output
This is a rework of the merge request #5 that unconditionally
forced the output to cross the 80 chars border.
With this commit users can switch to the wide output mode
with the -w option.
Jim Warner [Wed, 13 Nov 2013 06:00:00 +0000 (00:00 -0600)]
top: increase the maximum number of displayable fields
The recent addition of namespaces, combined with those
potential suse out-of-memory fields, means that we are
close to the maximum number of fields poor ol' top can
display. Imagine, the really old top was limited to 26
fields (28 with the suse hack) and this top had neared
the version 'g' rcfile limits which were a healthy 55.
This patch adds another 15 fields to the maximum while
making it even easier to increase in the future. Also,
top still silently accommodates older config files all
the way back to the original pre-ng version top-3.2.8!
Signed-off-by: Jim Warner <james.warner@comcast.net>
While 'invisible' thread subdirectories are accessible
under /proc/ with stat/opendir calls, they have always
been treated as non-existent, as is true with readdir.
This patch trades the /proc/#/ns access convention for
the more proper /proc/#/task/#/ns approach when thread
access is desired. In addition some namespace code has
been simplified and made slightly more efficient given
the calloc nature of proc_t acquisition and its reuse.
Jim Warner [Sat, 9 Nov 2013 06:00:00 +0000 (00:00 -0600)]
top: eliminate yet more gcc subscript resolution bloat
This patch is inspired by the 'minimize numa overhead'
patch. It trades the use of subscripts for pointers to
avoid gcc repeated subscript offset calculation bloat.
Now, throughout the cpus_refresh function, a subscript
will be resolved just once & this will (dramatically?)
reduce the path-length taken for each and every frame!
For example, a non-optimized compilation could produce
400+ fewer machine instructions through pointer usage.
[ ok, optimized compiles only save 18+ instructions! ]
Lastly, any residual 'symmetry only' crap is now gone!
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Fri, 8 Nov 2013 06:00:00 +0000 (00:00 -0600)]
top: minimize the statistics overhead for numa support
A recent libnuma potential corruption problem solution
has caused me to reevaluate some associated numa logic
for efficiency. Here is a summary of the problems that
exist with current libnuma/user possible interactions:
. Whenever the numa library was present extra overhead
would always be incurred in maintaining the node stats
even when the '2' or '3' commands were not being used.
. As part of such overhead a separate loop was used to
reinitialize each cpu/node structure with each display
cycle so that prior accumulated totals were preserved.
Again, it didn't matter if numa data was really shown.
This commit attempts to refocus on the 'critical path'
costs in a running top by optimizing for the occasions
when numa node data is not being displayed. Under such
conditions, no extra overhead will be incurred whether
or not a distribution has the libnuma library present.
To achieve this goal, some additional overhead will be
incurred, but only when actually displaying numa data.
And all such new costs have been minimized in spite of
the gcc inclination to duplicate subscript resolution.
Jim Warner [Thu, 7 Nov 2013 06:00:00 +0000 (00:00 -0600)]
top: add some flexibility to dlopen() for numa support
A recent libnuma potential corruption problem solution
suggests that libnuma could change in the future so as
to not spew to stderr. This then raises a question how
top could exploit any such library change since we are
currently locked into version #1 of the library by way
of our dlopen("libnuma.so.1", RTLD_LAZY) runtime call.
While not an ultimate solution, this commit will first
try for the most recent version of that library during
top's startup before trying the original libnuma.so.1.
We do this via the unqualified library soname symlink.
For this new dlopen() call to succeed, technically the
numa 'devel' package would usually have been required,
but that's not always true with every distro. And when
the libnuma.so symlink isn't present, it can always be
manually added should a newer & better behaved library
arrive & users tire of the stderr warning at top exit.
Jim Warner [Wed, 6 Nov 2013 06:00:00 +0000 (00:00 -0600)]
top: expand on column highlight quirks in man document
Confession is supposed to be good for the sole, right?
After a senior moment regarding the 'x' toggle quirks,
and thinking top had somehow regressed, I concluded an
additional explanatory note might well be appropriate.
Those quirks were already documented under the 5d & 5e
topics. But there was no such caution documented under
the 'x' command explanation itself, found in topic 4c.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Sun, 3 Nov 2013 05:00:00 +0000 (00:00 -0500)]
top: address some potential libnuma display corruption
There is a chance that the libnuma library may corrupt
top's display with some stderr warning messages in the
event something under /sys/devices/system/node/ cannot
be accessed. And, while 2 overridable 'weak' functions
are provided to alter such behavior, we can't use them
since top dynamically links to the library via dlopen.
This commit will redirect stderr to '/dev/null' during
just the first screen display cycle. Thus we can avoid
the corruption which would have remained visible until
the underlining screen row's data had finally changed.
Lastly, this patch should allow such a library warning
to actually appear when one finally exits our program.
[ i think the libnuma folks should consider changing ]
[ the error/warning interfaces to accommodate dlopen ]
[ rather than forcing something like the ugly kludge ]
[ we have employed or libnuma dependency on everyone ]
Jaromir Capik [Mon, 14 Oct 2013 13:38:33 +0000 (15:38 +0200)]
pidof: support for omitted %PPID and additional separators
This commit introduces support for special %PPID value that
can be passed to the -o option as a substitution for parent
PID. It also allows users to use two additional separators
for omitted PIDs - colon and semicolon.
Craig Small [Thu, 10 Oct 2013 23:07:10 +0000 (10:07 +1100)]
Update options to single strings
To assist the translators, each option is a separate string.
This means if we add/change/delete an option the remaining ones
will just keep working and only the impacted option needs some
translation work on it.
Jaromir Capik [Fri, 4 Oct 2013 18:35:01 +0000 (20:35 +0200)]
pidof: reimplemented from scratch (replacing sysvinit pidof)
As the sysvinit becomes obsolete, some of the bundled tools
need to find a new home. The procps-ng project seems to be
the most suitable project for adopting the pidof tool.
This commit introduces a redesigned version of pidof
that satisfies the LSB requirements.
In corner cases the behaviour might differ from the former
one as the new version doesn't use any stat(2) calls.
Craig Small [Wed, 9 Oct 2013 08:18:55 +0000 (19:18 +1100)]
Skip some tests if kill cannot be found
Some Debian pbuilders error out on some of the tests because
they cannot find kill to kill the test processes. Now if we
cannot find kill we skip those lot of tests.
Still need to work out why the S390 doesn't like test_sched
When Other filtering was introduced the nature of what
constituted a displayed row changed. No longer would a
task_show() call guarantee that another line is shown.
Rather, a non-empty string must have also been tested.
Unfortunately, when any task window was being filtered
for 'idle' mode or a particular 'user', the proc index
was incremented twice due to the perils of copy/paste.
Combining such an index increment with the new test of
task_show results works fine if filtering is inactive.
This was a particularly insidious bug which meant that
an adjacent task would be skipped whenever the current
task met 'idle' and/or 'user' filter criteria, and was
not otherwise excluded due to 'Other' filter criteria.
And, since it was the very next task that was ignored,
the bug was very susceptible to a window's sort order.
This could be illustrated when filtering on some user,
while sorting on PID. Then, toggling Forest View could
make otherwise unseen tasks appear and then disappear.
User workarounds are possible via interactive commands
trading the 'i' and 'u'/'U' provisions for the 'o'/'O'
other filtering capability thus avoiding an extra i++.
But that is certainly less than ideal and doesn't help
the 3.3.7 and 3.3.8 distorted command line provisions.
( this little buggie may end up costing me my pocket )
( protector, my coding badge & maybe even my cubicle )
Reference(s):
http://www.freelists.org/post/procps/Idle-elides-nonidle-processes
. bug originated with 'Other' filtering
commit 5edc6fb3174f1fd02bbfca61ec6d8a3a2e12f71c
Signed-off-by: Jim Warner <james.warner@comcast.net>
Craig Small [Fri, 20 Sep 2013 12:34:32 +0000 (22:34 +1000)]
sysctl --system ignores missing /etc/sysctl.conf
sysctl --system would not correctly return the RC for files in
subdirectories and would insist on having /etc/sysctl.conf
This update makes two changes when using sysctl --system:
- The RC status is ORed for each config file, meaning an error in
any file is propated to the RC
- If /etc/sysctl.conf doesn't exist we just don't load it
Jim Warner [Tue, 17 Sep 2013 05:00:00 +0000 (00:00 -0500)]
top: restore the lost final newline when in Batch mode
This patch adds the final newline when exiting 'Batch'
mode. Interestingly, it has been missing since release
3.3.5 but undetected until the Redhat bugzilla report.
Jim Warner [Thu, 12 Sep 2013 17:12:12 +0000 (12:12 -0500)]
misc: correct additional errors from merge request #13
Additional errors resulting from merge request #13 are
being addressed in this commit. They involve two cases
of trailing whitespace and one xwarnx printf type arg.
Jim Warner [Wed, 11 Sep 2013 14:11:13 +0000 (09:11 -0500)]
build-sys: fix the fatal 'make dist' error for nsutils
While a 'make dist' appeared to work fine without this
patch, the nsutils.h file was missing from the include
subdirectory. Thus the tarball could not support make.
Previously the shared memory column was always zero
for 2.6 series kernels (and later) due to the fact,
that the value was taken from the MemShared entry
that disappeared with 2.6 series kernels.
Later a new Shmem entry appeared in the /proc/meminfo
file and the 'shared' column now displays either
the MemShared or the Shmem value (depending on their
presence - the presence is mutually exclusive).
If none of the two entries is exported by the kernel,
then the column is zero.
free: clarification of credits for the Shmem support
An unpleasant thing happened when I comitted the shmem support
for the 'free' tool. We already had a merge request from
Adrian Brzezinski in the queue, doing exactly the same.
As Adrian deserves credits, I'm reverting the change
and re-applying with the next commit in order to make
him a part of the project history.
Jim Warner [Thu, 29 Aug 2013 05:00:00 +0000 (00:00 -0500)]
top: swat bug affecting batch mode and width provision
Normally, the internally tracked 'Screen_cols' can not
exceed the lessor of 512 or actual screen width. There
was one case, however, where that 512 byte upper limit
was no longer properly imposed as it should have been.
When operating in 'Batch' mode the actual screen width
was allowed to be exceeded when the optional -w switch
was also used. But, it should never have exceeded 512.
This patch ensures the upper limit is always observed.
Jim Warner [Tue, 20 Aug 2013 05:00:00 +0000 (00:00 -0500)]
top: correct, improve and otherwise tweak configs_read
This patch addresses the four '-Wunused-result' errors
generated whenever an optimized compile is invoked. It
also made the configs_read() guy a little more robust.
In the process, some logic was rearranged slightly and
some comments were re-indented simply for consistency.
Reference(s):
warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result]
warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result]
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Thu, 15 Aug 2013 05:00:00 +0000 (00:00 -0500)]
top: modest efficiency change to message line handling
When the final solution for cursor positioning for all
^Z or ^C cases was introduced the revised placement of
message line management introduced with the window mgr
'screen' refactor was retained. Those two commits mean
that a former tgoto was no longer needed when clearing
that msg line or displaying the scroll coordinate msg.
This patch eliminates the tgoto employed by frame_make
while assimilating a now defunct show_scroll function.
Jim Warner [Fri, 9 Aug 2013 05:00:00 +0000 (00:00 -0500)]
top: hint that Summary Area 'cached' is Mem (not Swap)
This patch just provides a visual clue to separate the
values reported for cached Memory from other values on
the Swapped line (which is being shared due to space).
Craig Small [Sun, 25 Aug 2013 07:43:20 +0000 (17:43 +1000)]
Increase watch interval.
watch would only use an interval of up to 4294 seconds and silently
change to this limit. The 4294 seconds is 2^32/10^6 or how many
microseconds fit into unsigned int.
This change increases the limit to 2^32 seconds which is
approximately 136 years. This should be ok for now. Anything above
the old limit now uses sleep() instead of usleep() which only uses
integers (so 9999.123 seconds will be 9999 seconds)
This bug was first reported in 2006 and included a patch by
Stephen Kratzer. The patch was updated to fit the current source.
Karel Zak [Tue, 13 Aug 2013 13:21:33 +0000 (15:21 +0200)]
build-sys: add support for silent buils
The automake AM_SILENT_RULES macro is supported since automake 1.11
(which is required for procps). The silent functionality is enabled by
default, you can change it by:
Karel Zak [Tue, 13 Aug 2013 13:21:31 +0000 (15:21 +0200)]
build-sys: cleanup AC_ARG_ENABLE() usage
* don't duplicate default behavior with [enable_foo=$enableval]
* don't introduce things like disable_* variables
* use everywhere the same coding style
Jim Warner [Wed, 7 Aug 2013 17:58:57 +0000 (12:58 -0500)]
ps: address a potential 'newline' quirk the libselinux
Sometimes with libselinux present but SELinux inactive
the context reported is "unconfined" which contains an
embedded newline. This then causes misalignment of any
subsequent data. So, ps will now protect against that.
Jim Warner [Sat, 6 Jul 2013 05:00:00 +0000 (00:00 -0500)]
top: correct cursor positioning for all ^Z or ^C cases
Some more (very obscure) conditions where a suspension
or program end might embed the shell prompt within top
output have been uncovered beyond the 2 already known.
We had already covered some suspend/end contingencies:
1. the users were using the 'fields management' screen
2. the users were prompted for any line oriented input
However, there remained some situations where ^Z or ^C
could still produce a misplaced cursor + shell prompt:
3. the 'g' command while waiting for the window choice
4. the 'W' command if about to overwrite an old rcfile
5. the '=' command when exploiting the Inspect feature
6. the period during which any error message was shown
But, even when all those bases are covered there still
remains a remote possibility that such interrupts will
occur during a top repaint cycle. So rather than throw
yet more code at these self-inflicted problems perhaps
it is better if we just throw in the proverbial towel.
Thus, I'll take the only sane approach and restore the
results expected ever since top's inception and before
scrollback buffers entered the picture. Namely, with a
^Z or ^C the cursor will be placed on the final screen
row. That usually means it will immediately follow the
last output line but it may follow many blank lines if
the user interrupts top when *not* on the main screen.
Jim Warner [Fri, 5 Jul 2013 05:00:00 +0000 (00:00 -0500)]
top: tweak cursor state code to swat an obscure buglet
An obscure bug has been discovered where a 'W' with an
old rcfile, warning against overwrite, would display a
cursor that should normally be hidden. This followed a
user's reply. So some logic was rearranged just a bit.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jaromir Capik [Wed, 7 Aug 2013 16:21:43 +0000 (18:21 +0200)]
free: reusing 'shared' for Shmem
Previously the shared memory column was always zero
for 2.6 series kernels (and later) due to the fact,
that the value was taken from the MemShared entry
that disappeared with 2.6 series kernels.
Later a new Shmem entry appeared in the /proc/meminfo
file and the 'shared' column now displays either
the MemShared or the Shmem value (depending on their
presence - the presence is mutually exclusive).
If none of the two entries is exported by the kernel,
then the column is zero.
Jaromir Capik [Wed, 7 Aug 2013 15:52:38 +0000 (17:52 +0200)]
ps: making the libselinux support configurable
Previously the libselinux support was present
in the sources, but disabled with a preprocessor
condition (#if 0).
From now the libselinux support can be enabled with
the --enable-libselinux switch available
in the configuration script. That way is more
flexible than local patches modifying the condition
value from 0 to 1.
Colin Watson [Mon, 5 Aug 2013 10:52:22 +0000 (20:52 +1000)]
pwdx: fails when run in a nonexistent locale
pwdx rather mysteriously fails with "invalid process id" when run in a
nonexistent locale (e.g. "LC_ALL=foo pwdx $$"). This is because it
fails to obey the documented calling sequence for strtol - that is, set
errno to 0 before the call - and thus the errno from the setlocale
failure bleeds over into its check for whether strtol failed.
Jim Warner [Mon, 1 Jul 2013 05:00:00 +0000 (00:00 -0500)]
top: cursor repositioning includes line oriented input
A recent patch introduced the ability to recognize the
need to reposition the cursor at suspension or program
end. There remained unmet 1 additional potential need.
This commit extends that ability to embrace line input
so that if a user issues ^Z or ^C while being prompted
the resulting shell output will no longer be embedded.
Jim Warner [Sun, 30 Jun 2013 05:00:00 +0000 (00:00 -0500)]
top: refine some miscellaneous signals interrupt stuff
This commit mostly justs renames a few identifiers but
it also will now suppress any end-of-job report if top
wasn't ended via the 'q' key convention (i.e. signal).
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Fri, 28 Jun 2013 05:00:00 +0000 (00:00 -0500)]
top: enable screen contents preservation at end-of-job
The title of this commit is actually quite misleading.
Were it more accurate, it would at least mention a tty
emulator's scrollback buffer, which was the cumulation
of a long pursuit to reduce the SIGWINCH overhead when
a window manager carelessly floods an application with
that signal *while* a user is still resizing a window!
Disabling and enabling that scrollback buffer resulted
in the final top display replaced with original screen
contents, a phenomenon acknowledged at the time but it
also represented a user interface change which has now
produced the first request for return to old behavior.
After the SIGWINCH dust settled, another problem arose
regarding behaviors under the 'screen' window manager.
In response, top was refactored a bit to avoid display
corruption. That was before discovering 'screen' could
duplicate the scrollback buffer behavior top expected.
As it turns out, the 'screen' refactoring had probably
made scrollback buffer manipulation unnecessary. Still
one could argue that a window should not be allowed to
scroll while a constantly updating program was active.
The solution represented in this commit returns former
behavior at program end (retaining top's last screen).
And if we ever wish to disable scrollback buffers, the
associated logic was retained but made conditional. It
is not reflected in configure.ac but might be someday.
Lastly, this commit corrects cursor positioning when a
^C is issued under 'Fields Management' at any terminal
that didn't have a scrollback buffer (i.e. a console).
Jim Warner [Tue, 25 Jun 2013 05:00:00 +0000 (00:00 -0500)]
library: for atexit() support, fix fileutils for EPIPE
When fileutils with stream error checking was borrowed
from GNU lib, an omission was also propagated where an
errno of EPIPE wouldn't be preserved in close_stream()
making a test for EPIPE in close_stdout() meaningless.
This patch corrects such oversight so that an errno of
EPIPE no longer produces 'write error' at program end.
( gnulib provides for optionally ignoring EPIPE, but )
( if a program chooses to ignore it, then their code )
( appears to suffer from this close_stream oversight )
Jim Warner [Thu, 20 Jun 2013 05:00:00 +0000 (00:00 -0500)]
top: trade two groff_mdoc macros for groff equivalents
The .Bd and .Ed macros, from the mdoc collection, have
caused a few raised eyebrows (lintian, doclifter, etc)
in the past. With this commit, we will trade their use
for the standard existing groff .nf & .fi equivalents.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Vadim Ushakov [Tue, 11 Jun 2013 04:09:05 +0000 (12:09 +0800)]
Fix overflow of "running" value in getstat()
It seems in some cases procs_running field of /proc/stat can contain 0 even if vmstat itself is running. At least this can be reproduced on Linux 3.9.3 compiled with BFS scheduler.
Since getstat() decrements value of procs_running by 1, we get overflow:
$ vmstat 1
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 667732 918996 57376 911260 21 30 36 40 98 45 14 82 4 1 4294967295 0 667728 916716 57376 911264 8 0 8 0 1958 3733 28 7 65 1
0 0 667700 915996 57376 911416 24 0 152 0 1735 3600 23 5 71 1 4294967295 0 667700 915872 57376 911392 0 0 0 0 1528 3165 21 4 76 0
Jim Warner [Thu, 6 Jun 2013 05:00:00 +0000 (00:00 -0500)]
top: add the major version to dlopen of libnuma soname
When the plug-in approach to NUMA support was added, I
carelessly employed the compile-time linker convention
for naming the library. Technically this then required
the 'devel' package for NUMA support to be present for
the unqualified soname symlink to be available. Either
that or one must have manually created such a symlink.
This commit adds the missing major version to dlopen()
of libnuma.so.1 so simply having a more likely package
such as 'numactl' will enable both '2' & '3' commands.
References(s):
http://www.freelists.org/post/procps/top-NUMA-node-CPU-utilization-support,25
. initial dlopen support
commit edba932a7e9b950dd91bc486e107788e977a5186
Signed-off-by: Jim Warner <james.warner@comcast.net>
Gilles Espinasse [Thu, 23 May 2013 21:22:49 +0000 (23:22 +0200)]
procps-ng : tests, remove which dependency
which is a separate package that may not be available and is not yet build on Linux from scratch build order.
Instead use posix command -v. command -v is a builtin working with bash-4.2, 3.0.25 or even old bash-2.05 or current debian dash
Gilles Espinasse [Sat, 25 May 2013 21:25:55 +0000 (07:25 +1000)]
skip kill test too if running runtest
I find more readable instead of make check to run
cd testsuite && make site.exp && DEJAGNU=global-conf.exp runtest
But in that case, kill.exp was still trying to run with
ERROR: tcl error sourcing ./kill.test/kill.exp.
ERROR: couldn't execute "/usr/src/procps-ng-3.3.7/kill": no such file or
directory
...
Jim Warner [Wed, 22 May 2013 05:00:00 +0000 (00:00 -0500)]
top: change man document license used from GFDL to GPL
This patch brings the man document into agreement with
Debian's current licensing standards. The 3 urls below
discuss their concerns over the GFDL and also document
quite a few additional packages with similar licenses.
( jeeze, 12+ friggin' years & finally someone grep'd )
( for what was just a couple of 'invariant' sections )
Reference(s):
. why gfdl is unsuitable
http://www.debian.org/vote/2006/vote_001
. draft position statement
http://people.debian.org/~srivasta/Position_Statement.xhtml
. busted by lintian
http://lintian.debian.org/tags/license-problem-gfdl-invariants.html
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Sat, 18 May 2013 05:00:00 +0000 (00:00 -0500)]
top: inoculated against a window manager like 'screen'
If top were invoked under the 'screen' window manager,
writing the terminfo string 'exit_ca_mode' at top exit
would not restore the display to the state existing at
the time top was started. That's what occurs normally.
The net result of that failure was a corrupted screen.
However, there is a 'screen' configuration option that
will produce proper 'rmcup' behavior, but it is off by
default. That screencr option is known as 'altscreen'.
I stumbled across this provision by cloning the screen
git repository then searching for references to 'cup'.
If 'altscreen on' had been in either the /etc/screenrc
or the $HOME/.screenrc configuration file, my poor old
top would never have been accused of such corruptions.
Of course, the Programming Gods decree that any simple
solution for our problem must always be revealed last.
So before discovering that rc option, another approach
was taken involving top only. With just a little extra
refactoring of top display logic he was made immune to
any such quirk in the implementation of 'smcup/rmcup'.
I always feel good about any enhancement that actually
reduces the total number of lines of code. Even though
this change involved mostly rearranging some logic, it
yielded one less line (can't judge by diffstat because
of braces & notes). Anyway, rather than requiring some
change to a screenrc file, now we are self-sufficient.
Reference(s):
procps ---------------------------------------------
https://bugzilla.redhat.com/show_bug.cgi?id=962022
http://www.freelists.org/post/procps/top-procpsng337-no-screen-cleaning-at-exit,3
. top : disable tty scrollback buffer to improve SIGWINCH
commit dedaf6e1a81738ff08ee8e8523871e12f555ad6d
screen ---------------------------------------------
git://git.sv.gnu.org/screen.git
. Improve cursor store/restore on smcup/rmcup.
commit f95352946080be803b794c9f2733d8c809c1a39a
. Fix using alternate screen buffers in some cases.
commit ad56f746c6243d45124485d198d577bdbb78071c
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=558724
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Tue, 14 May 2013 05:00:00 +0000 (00:00 -0500)]
top: provide a build option to change memory precision
When summary & task area memory scaling was introduced
in release 3.3.6, the memory field widths were widened
slightly so unscaled KiB values could be provided more
consistently and scaled values (beyond MiB) could show
3 decimal places of precision. However, some users may
prefer the former widths/precisions for memory fields.
This commit will provide a build time configure option
to return top to those former defaults as a compliment
to a new %CPU & %MEM field precision configure option.
Jim Warner [Tue, 14 May 2013 05:00:00 +0000 (00:00 -0500)]
top: revert %CPU and %MEM precision to former defaults
When summary & task area memory scaling was introduced
in release 3.3.6, the percentage columns were expanded
to provide 3 decimal places of precision. In hindsight
that may have been overkill, making those columns more
of a distraction than useful, with just too much info.
This patch will revert those columns to the former one
decimal place. And as was true, that decimal point may
be sacrificed depending on the number of cpus present.
And, in case anyone might prefer additional precision,
a build option can provide it (--enable-wide-percent).
Jim Warner [Mon, 13 May 2013 05:00:00 +0000 (00:00 -0500)]
top: eliminate troublesome apostrophes in man document
Some versions of man have had trouble with the leading
apostrophe employed with interactive commands/toggles.
Instead, a '?' would be displayed in their place. With
this patch all such conventions have now been removed.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Markus Mayer [Wed, 8 May 2013 23:34:44 +0000 (16:34 -0700)]
Fix btime handling reading from /proc/stat
Function getbtime() currently makes the assumption that btime==0 equals
btime not being present in /proc/stat. This is not quite accurate, as
timestamp 0 is, in fact, also a valid time (Epoch), and /proc/stat may
report it as such.
We introduce a flag to indicate whether btime was found in /proc/stat.
In this way, btime==0 becomes a valid case, provided /proc/stat
actually reports this as the boot time.
procps can still detect the case of btime actually not being reported
by the kernel.
Jim Warner [Sun, 5 May 2013 05:00:00 +0000 (00:00 -0500)]
build-sys: allow a build when libdl.so is truly absent
The earlier commit purporting to allow top to be built
in the absence of that dynamic linking library stopped
just a little short of the truth. So this will fix it.
Craig Small [Sun, 5 May 2013 00:07:30 +0000 (10:07 +1000)]
Updated configure.ac
Been a while since we ran a re-scan over the autotools files. This
change modernises the configure file. Not a great deal of changes
required to bring us up to date, autoscan doesn't understand our
optional things, which is fine.
Jim Warner [Thu, 25 Apr 2013 05:00:00 +0000 (00:00 -0500)]
top: introduce a plug-in approach for the NUMA support
The NUMA/Nodes support in top has gone through several
evolutions (primarily dealing with build-sys options).
With this commit the library dependency issues are now
moot and the responsibilities for run-time loading and
dynamic linking are assumed by the top program itself.
Henceforth, if top is executed in an environment where
libnuma.so is present, top will offer such extensions.
Even more importantly, when a missing libnuma is later
installed, top will offer numa support auto-magically.
All NUMA/Node build-sys dependencies are thus removed.
The former NUMA_ENABLED define has become NUMA_DISABLE
should anyone wish to test user interface implications
in an environment that *does* have libnuma. It is also
represented as the ./configure option: --disable-numa.
Lastly, the 't' (View_STATES) toggle will be forced on
for sanity whenever the '1', '2' or '3' keys are used.
Reference(s):
. original idea from: Dr. Fink <werner@suse.de>
http://www.freelists.org/post/procps/top-NUMA-node-CPU-utilization-support,18
. original numa suppoort
commit 8d989c68c068541a814bf0d2340ac9b0373f24b5
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Thu, 25 Apr 2013 05:00:00 +0000 (00:00 -0500)]
build-sys: eliminate dependencies for the NUMA support
Oh that poor ol' build system. With this patch it will
have gone through three separate incarnations in terms
of NUMA/Node support. Those 3 iterations consisted of:
1. A 'porridge too hot' where the top numa support was
enabled if it was built in the presence of libnuma and
the numa.h header. But if the numa library wasn't part
of core packages, that would have broken poor old top.
2. A 'porridge too cold' where numa support was off by
default and must have been explicitly enabled when the
./configure script was run. This could have meant that
distros might not distribute a numa-aware procps, even
though their numa library would have been distributed.
3. And this 'porridge' where the top numa support will
become a 'plug-in' feature activated when the presence
of libnuma.so can be verified at runtime. We'll do our
own loading and symbol resolution (with some help from
dlopen in libdl). Thus maintainers' responsibility for
enabling numa support and then satisfying that library
dependency is now an entirely optional --disable-numa.
As Goldilocks might say about our current configure.ac
"Ummm, I think this porridge tastes just about right".
ps: possibility to display systemd user unit for a process
Library systemd-login offers possibility to display
name of systemd user unit for specific pid. Note that not all
processes are part of a user unit.
This patch adds output option "sd_uunit" which will
show name of user unit or "-", when process does not belong
to any user unit. This is similar to "sd_unit" but applies
to user units instead of system units.
To maintain compatibility with non-systemd systems,
procps must be configured with --with-systemd option
to enable this option.
ps: possibility to display uid of session owner for a process
Library systemd-login offers possibility to display the Unix
user identifier of the owner of the session of a process.
This information will also be displayed for user processes which
are shared between multiple login sessions of the same user,
where sd_session will be blank.
This patch adds output option "sd_ouid" which will show
user UID or "-", when there is no owner for a process.
To maintain compatibility with non-systemd systems,
procps must be configured with --with-systemd option
to enable this option.
ps: possibility to display login session for a process
Library systemd-login offers possibility to display name
of login session for specific pid.
Note that not all processes are part of a login session
(e.g. system service processes, user processes that are shared
between multiple sessions of the same user, or kernel threads).
This patch adds output option "sd_session" which will
show name of session or "-", when process does not belong
to any session.
To maintain compatibility with non-systemd systems,
procps must be configured with --with-systemd option
to enable this option.
ps: possibility to display systemd unit for a process
Library systemd-login offers possibility to display
name of a systemd unit file for specific pid. Note that
not all processes are part of a system unit/service
(e.g. user processes, or kernel threads).
This patch adds output option "sd_unit" which will
show name of systemd unit or "-", when process does not
belong to any unit.
To maintain compatibility with non-systemd systems,
procps must be configured with --with-systemd option
to enable this option.
Jim Warner [Sun, 14 Apr 2013 05:00:00 +0000 (00:00 -0500)]
library: dynamic buffer management even more efficient
One recent patch to dynamic buffer management involved
over-allocating the buffer increase to lessen calls to
xrealloc. That was successful, but the actual increase
amount did not attempt to optimize size or alignments.
With this commit, we'll copy an approach recently used
by the top program and round up buffer sizes to 1 KiB.
More importantly, while buffers are quickly reaching a
KiB optimum multiple, no memcpy will ever be employed!
To illustrate just how effective top's algorithm would
be, just change the initial and subsequent allocations
from the current 1024 bytes to just a single byte then
add an fprintf. Those one byte reallocations while on
the way to optimum buffer size will be a one-time cost
and won't represent any recurring performance penalty.
( gosh, that top program *must be* one fart smeller, )
( or was that a smart feller, i can't remember which )
Jim Warner [Sun, 14 Apr 2013 05:00:00 +0000 (00:00 -0500)]
top: snapshot /proc/stat reads to minimize distortions
Almost forever, top has been accessing the /proc/stat/
directory one line at a time until either smp_num_cpus
was reached or (more recently) Screen_rows is reached.
When NUMA/Nodes support is enabled screen rows will no
longer serve as a limit because all cpus must be read.
With this commit, the entire /proc/stat/ directory can
be read at once so all statistics will be frozen. Thus
individual cpus will no longer keep "ticing" until top
gets around to accessing them via some separate fgets.
The distortion this commit eliminates was quite easily
seen when comparing old/new tops using: individual cpu
stats vs. cpu summary; a healthy delay interval of 3-5
seconds; manually synchronized update cycles (the hard
part); some system loading (maybe another top at -d0).
Additionally, this patch eliminates some long standing
unnecessary initialization made possible because of an
allocation via calloc. If some parts are never touched
by sscanf due to a kernel version, it's unnecessary to
repeatedly re-initialize those portions to zero again.
Jim Warner [Sun, 14 Apr 2013 05:00:00 +0000 (00:00 -0500)]
top: change number of emulated cpus from four to eight
With the addition of NUMA/Node support and the ability
to emulate such support even in the absence of libnuma
and numa.h, the maximum number of cpus top can emulate
was increased to make numa emulation more interesting.
( whew, that's an awful lot of "emulates", me thinks )
A PID should be specified with --ns:
$ pgrep --ns 12345
which will only match the processes which belong to to the same 6
namespaces. It is also possible to specify which namespaces to test:
$ pgrep --ns 12345 --nslist mnt,net,ipc
which will match processes that belong to the same mount, network and
IPC namespaces as PID 12345.
Each process in Linux has a /proc/<pid>/ns directory which contains
symbolic links to pipes that identify which namespaces that process
belongs to. This patch adds support for ps to display that information
optionally.
top: program code changes, enable NUMA/Node extensions
This commit extends the top Summary Area cpu states to
include information on Non-Uniform Memory Architecture
nodes. It is based upon changes originally proposed by
Lance Shelton who was instrumental in the final patch.
With this change, the user will have new commands that
will provide alternatives to the individual cpu stats:
. '2' toggles between cpu & numa node summary displays
. '3' provides node summary and related cpu statistics
These extensions required some minimal system support.
Typically, the numactl package (and maybe libnuma-dev)
are all that's needed to show a single node which owns
all the processors. Failing that, or for slightly more
variety, top also offers a #define named PRETEND_NUMA.
(everything is perfectly justified plus right margins)
(are completely filled, but of course it must be luck)
Signed-off-by: Jim Warner <james.warner@comcast.net> Signed-off-by: Lance Shelton <LShelton@fusionio.com>
Pierre Labastie [Sun, 7 Apr 2013 08:31:26 +0000 (18:31 +1000)]
Improved regexp test for pmap
The change in pmap is necessary if it happens that the whole output of
pmap -X or -XX has been done before the second regexp is matched. Since
the matching is greedy, it is matched by the full output, so that
nothing is left for the third regexp and the test fails with
FAIL: extra extended output (footer).
projects / procps-ng / log