Commit Graph

318 Commits

Author SHA1 Message Date
Jim Warner
b4fdb27a05 top: provide for expanded potential displayable fields
This commit provides for raising the total displayable
fields from its current 70 to 86. It also bumps the id
in an rcfile representing the version from 'i' to 'j'.

The increase in number of fields will make sharing the
rcfile with an older top, once it's saved, impossible.

These changes are being done via a #define rather than
hard coded so any such sharing will still be possible.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-08-01 20:11:11 +10:00
Jim Warner
63f8c16fa4 top: make compilation possible under netbsd-curses too
Whoa, I had never considered an alternative to ncurses
until the issue referenced below was raised. Thus, I'm
surprised to find that 'tparm' was the only impediment
to ultimately utilizing this alternate curses library.

And, while we could have substituted that non-standard
'tiparm' with only 2 arguments, we'll utilize the full
parms compliment in the spirit of that original patch.

Frankly, the task of developing an alternative library
to that ncurses implementation really boggles my mind.

Congratulations to rofl0r, whoever that masked man is.

Reference(s):
. issue raised
https://gitlab.com/procps-ng/procps/issues/38
. netbsd-curses home
https://github.com/sabotage-linux/netbsd-curses

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-17 08:52:50 +10:00
Jim Warner
eca9168617 misc: adapted others to that new proc_t 'cgname' field
This patch adapts the ps program to a newly add proc_t
field and provides for new support in that top program
along with his man document (ps was already ok there).

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-06 21:33:17 +10:00
Jim Warner
c15aea9d08 top: eliminate 2 author sections from the man document
We'll follow Craig's lead and whack some author stuff.

[ and we'll honor the SEE ALSO guideline for periods ]
[ but essentially ignore all the other busybody crap ]
[ which, to be honest, we pretty much follow already ]

[ actually, if you're told to follow a certain style ]
[ in program examples, you've gone way past busybody ]
[ crap and have entered the realm of anal retentive! ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-06 21:33:17 +10:00
Jim Warner
5e33325f9a top: improved that #define PRETENDNOCAP implementation
This development (only) define can be used to turn top
into a simple text program, disabling termcap effects.
But input (at screen bottom) suffers from a line wrap.

So, this commit just makes the input prompt processing
a little more effective by adding one leading newline.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-06 21:33:17 +10:00
Jim Warner
29079d35e5 top: accommodate the loss of that OOMEM_ENABLE #define
Now that the conditional OOMEM_ENABLE has been removed
and all users exposed to those 'out of memory' fields,
it's about time we added them to the top man document.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-07 20:49:30 +10:00
Jim Warner
10503c03d4 top: make more responsive when toggling cpu off/online
Using the <STAT> api under the newlib branch, that top
program is very responsive to changes in the number of
on-line cpus. However under the master branch this top
program is very responsive only to losses of some cpu.

When a cpu is brought back on-line potential delays of
60 seconds could be encountered. That delay was simply
an attempt to reduce costs and reflected the erroneous
assumption that adding a cpu required physical effort.

So without redesigning the cpu refresh code to emulate
that of newlib, this commit just reduces the potential
delay to 3 seconds (the same that is used for memory).

[ As an aside, if one wants to have their confidence ]
[ in that htop program badly shaken, try taking some ]
[ cpus off-line & on-line again while it is running. ]

[ Poor ol' htop just continues to report results for ]
[ whatever were the cpus when started. Nice feature, ]
[ but I wonder where those phantom results are from. ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-07 20:49:30 +10:00
Jim Warner
ac8f49e79e top: miscellaneous accumulated tweaks of code/comments
This commit just tries to parallel that newlib branch.
It contains the following changes, which were prompted
by the newlib coverity analysis which Craig initiated:

. comment typo predicting 'String not null terminated'
. eliminate 'Logically dead code' from insp_make_row()

Some tweaks, unrelated to coverity, are also included:

. use more modern (recommended) approach for time call

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-07 20:49:30 +10:00
Jim Warner
5e26512980 top: extend 'zero suppression' scope to several fields
This commit just tries to parallel the implementations
in the newlib branch. The config file Rc.zero_suppress
will be extended to include both out-of-memory fields.

And while we're at it, we'll also extend zero suppress
to that NI (nice value) field, which already should've
had it. Plus we trade those namespaces custom suppress
logic for our now slightly enhanced make_num function.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-07 20:49:30 +10:00
Jim Warner
5892540819 top: man page now includes resident memory enhancement
Since support already exists in the newlib branch this
represents an equivalent master branch implementation,
and this commit message is shared with 2 more patches.

Beginning with linux-4.5, the following new fields are
being added under that /proc/<pid>/status pseudo file:
 . RssAnon - size of resident anonymous memory
 . RssFile - size of resident file mappings
 . RssShmem - size of resident shared memory

p.s. Locked resident memory support was also added but
isn't directly related to the kernel 4.5 enhancements.

p.p.s. Archlinux, Debian-stretch and Fedora-23 already
are currently using a 4.5 linux kernel (as of 6/2/16).

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-07 20:49:30 +10:00
Jim Warner
6306050a65 top: exploit new linux-4.5 resident memory enhancement
Since support already exists in the newlib branch this
represents an equivalent master branch implementation,
and this commit message is shared with 2 more patches.

Beginning with linux-4.5, the following new fields are
being added under that /proc/<pid>/status pseudo file:
 . RssAnon - size of resident anonymous memory
 . RssFile - size of resident file mappings
 . RssShmem - size of resident shared memory

p.s. Locked resident memory support was also added but
isn't directly related to the kernel 4.5 enhancements.

p.p.s. Archlinux, Debian-stretch and Fedora-23 already
are currently using a 4.5 linux kernel (as of 6/2/16).

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-07 20:49:30 +10:00
Jim Warner
dad56cc954 top: minimal necessary corrections to the man document
After experimenting with those 4.5 kernel enhancements
to /proc/<pid>/status, that newly added overview topic
'Memory Types' was found to be in need of some tweaks.

In addition, the 'DATA' description wasn't quite broad
enough since explicit private file mappings impact it.

( lastly, for the record, the 2nd commit referred to )
( below contained an incorrect reference that should )
( have been the original issue 21 commit. instead it )
( showed an invalid SHA-1 hash. i believe i have now )
( identified a flaw in my workflow that produced it. )

Reference(s):
. original patch responding to issue #21
commit e4bbd3ca1a
. subsequent patch with invalid commit ref
commit 5dcbcd00fe

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-04-14 21:04:20 +10:00
Jim Warner
5dcbcd00fe top: add additional memory information to the man page
In response to Issue #21, the commit referred to below
provided some much needed improvements and corrections
to topic `3a. DESCRIPTIONS of Fields' in the man page.
However, it assumed a reader possessed much background
knowledge that may not, in truth, actually be present.

So without, hopefully, insulting anyone's intelligence
this patch offers an expanded discussion of some terms
and concepts within a separate section under OVERVIEW.

[ plus it affords an opportunity to incorporate that ]
[ extremely useful table from Florent Bruneau's post ]

Reference(s):
commit f2a08cf16794ec6085bdecbaf8f7c2887cd4e87f
https://techtalk.intersec.com/2013/07/memory-part-1-memory-types/

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-03-23 22:25:59 +11:00
Jim Warner
e4bbd3ca1a top: improve/correct several memory fields in man page
Due to quirks in kernel memory management plus limited
information available from /proc/<pid>/status & statm,
some of the top resident memory fields were capable of
exceeding available physical memory. So this commit is
a bit of a band-aid until the kernel has been changed.

Such a change appears to be on the horizon in the form
of three new fields to be added to /proc/<pid>/status.
While not preventing 'resident' memory from apparently
exceeding physical memory, the new fields will help to
clarify any such contingency, if/when we exploit them.

Reference(s):
. original post by Samuel Thibault
https://gitlab.com/procps-ng/procps/issues/21
. informative memory analysis
https://techtalk.intersec.com/2013/07/memory-part-1-memory-types/
https://techtalk.intersec.com/2013/07/memory-part-2-understanding-process-memory/
. kernel changes to /proc/<pid>/status
commit 8cee852ec53fb530f10ccabf1596734209ae336b
commit eca56ff906bdd0239485e8b47154a6e73dd9a2f3

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-03-15 21:25:33 +11:00
Jim Warner
717d73f1dd top: tweaks to vertical scroll management & 'i' toggle
The commit referenced below claims to disable vertical
scrolling when idle tasks weren't being shown. However
it really addresses only a point in time when that 'i'
toggle is keyed. Left untouched were the up/down keys.

So this commit will simply finish the job of disabling
vertical scrolling whenever tasks which have used some
CPU are the only ones which are currently being shown.

Reference(s):
commit c07f6c5e6d

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-03-12 14:50:57 +11:00
Craig Small
da715e3ca0 Replace %Lu with standard %llu
Multiple scanf()s use the GNU-permitted %Lu. This is not supported in
other libraries and isn't to the POSIX specification. The L modifier
is only used for floats in POSIX.

Replacing %Lu with %llu is the same for GNU libc (scanf(3) says as much)
but means other libraries will work fine.

Closes: #19

References:
 http://pubs.opengroup.org/onlinepubs/009695399/functions/fscanf.html
2016-03-03 21:43:52 +11:00
Jim Warner
94e4749be3 top: extend '=' key to include active 'locate' request
It is documented behavior that when certain other keys
are active, sorts column highlighting will temporarily
be disabled. Among those keys is the 'L' (locate/find)
provision. The equals ('=') key can be used to restore
column highlighting by resetting other keys, except 1.

When a locate/find is active, the '=' key will have no
effect on 'x' column highlighting, which still remains
disabled. Further, when 'L' is active an 'x' keystroke
is processed changing the state of column highlighting
but without any visual clue (since it's yet disabled).

So this commit just extends the '=' key to embrace 'L'
processing resets, just like other highlight disabling
keys while avoiding 'x' state changes if approproiate.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-28 21:01:49 +11:00
Jim Warner
489d23a132 top: ATEOJ_RPTHSH prints hash table entries less often
We'll following the newlib <pids> approach to hashing:

. a 'PIDs at max depth:' portion of that UNREF_RPTHASH
enabled #define is now published only when the maximum
depth of hash table entry chains exceed depths of one.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-28 21:01:28 +11:00
Jim Warner
e1cd74eec9 top: do not co-mingle strings/numbers under namespaces
Craig's recent commit under that newlib branch dealing
with namespace support has prompted me to review top's
handling of those fields. Currently, when such a field
is zero, top displays a dash ('-'). This will mean the
justification toggles ('j/J') will behave incorrectly.

This patch simply allows the potential zero to display
or be suppressed with the already existing '0' toggle.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-28 21:01:23 +11:00
Jim Warner
c7201d52eb top: miscellaneous accumulated tweaks to code/comments
A patch containing the following miscellaneous tweaks:

. remove a function that handled former library errors
[ that function should have gone bye-bye with 3.3.11 ]
[ when those 'wchan' provisions were much simplified ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-28 21:01:16 +11:00
Jim Warner
b1f7b2a509 top: update the man document reporting bugs suggestion
Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-28 21:00:21 +11:00
Jim Warner
3da298c1d6 top: fix unlikely edge case wherein all fields are off
While testing a newlib interface for pids acquisitions
I encountered some unexpected results if an idiot user
(me) turns off all displayable fields. So, this commit
ensures that the PID field will be shown as a minimum.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-08-06 21:56:27 +10:00
Jim Warner
8226ca9838 top: avoid an unnecessary conversion for 'USED' column
When the USED column was introduced the proc_t.vm_swap
& proc_t.resident values were added together. However,
using 'resident' required an additional PROC_FILL flag
not to mention extra conversion of pages to kibibytes.

So now we'll use an already present vm_rss value which
removes any special handling for top's derived column.

And while we're at it we'll trade some more 'resident'
field uses with that more immediately usable 'vm_rss'.

Reference(s):
commit 709785e20b

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-08-06 21:56:02 +10:00
Jim Warner
9ba65bad8e top: miscellaneous accumulated tweaks to code/comments
Jeeze, to correct spelling on one single word (incure)
you had to go and align the entire comments paragraph?

[ well, at least there's one other minor code change ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-08-06 21:52:11 +10:00
Jim Warner
9cc6ed10c8 top: eliminate 'user' from the inspection view headers
Since it's possible that euser name is not being shown
or the horizontal position had been scrolled past that
USER column, then part of those headers will be blank.

So it doesn't make sense to try and show the USER that
is associated with a process at all. Thus, this commit
simply removes the 'user' provision from both headers.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-08-06 21:50:49 +10:00
Jim Warner
c07f6c5e6d top: improve vertical scroll management for 'i' toggle
When a user is taking advantage of the scroll features
it is likely a scrolled vertical position is well past
the first displayable task. That is especially true of
top's forest view ('V') mode where those early systemd
attached processes are generally not very interesting.

As such, should the idle mode toggle ('i') be employed
a distorted display is almost guaranteed because tasks
that have used some cpu, and thus should be displayed,
have already been skipped by virtue of their position.

So this patch temporarily nullifies vertical scrolling
during the period when idle tasks are not being shown.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-07-21 21:23:44 +10:00
Jim Warner
88fe45ef68 top: sacrifice a redundant procps_linux_version() call
With the commit referenced below, the linux version is
no longer available via an external variable. So we'll
eliminate the extra superficial function call employed
at program end as part of a debugging (only) o/p spew.

[ the user will soon be returned to the command line ]
[ & he/she can run their own 'uname -r' if in doubt! ]

Reference(s):
commit 56d9d5e7e7

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-06-21 08:05:59 +10:00
Craig Small
56d9d5e7e7 library: Change linux version
Added function procps_linux_version() which used to be an
exported integer instead.  Also changed the method of obtaining
the linux version (more correctly the os release) to use a specific
procfs entry. This works for both Linux and FreeBSD.
2015-06-19 21:00:46 +10:00
Jim Warner
3600f652e8 documentation: fix man pages due to refactor for wchan
This patch will bring three of our man pages into line
with the recent refactor of the libprocps wchan logic.

[ and also eliminates more damn eol whitespace which ]
[ snuck in our repo with the commit referenced below ]

Reference(s):
http://www.freelists.org/post/procps/WCHAN,11
commit cf4788c28d

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-06-19 19:09:21 +10:00
Jim Warner
93666da62c top: adapt to a simplified library interface for wchan
This patch was made necessary by those library changes
in support of recently revised/simplified wchan logic.

Reference(s):
http://www.freelists.org/post/procps/WCHAN,11

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-06-19 19:09:20 +10:00
Jim Warner
932f54b19d top: correct an alphabetic field error in man document
Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-06-19 19:09:20 +10:00
Craig Small
505f257a8c library: remove procps_version functions
It doesn't make any sense to have the binary version strings
embedded into the library. The version strings are defined
already either in the Makefile or in include/c.h
2015-06-18 22:37:24 +10:00
Jim Warner
d8aee1a809 top: update man document to support the LXC containers
[ in addition to the primary 'lxc' business, i found ]
[ numerous apostrophes used instead of that back-tic ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-06-14 15:36:06 +10:00
Jim Warner
2ba7aa8b7d top: add support exploiting new library LXC containers
Reference(s):
https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1424253
https://bugs.launchpad.net/ubuntu/+source/procps/+bug/1424253

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-06-14 15:36:06 +10:00
Filipe Brandenburger
c1c73c0d00 build-sys: merge automake subdirs into toplevel
This will be required for subdir-objects, otherwise automake will have
problems with more than one Makefile.am having rules to build the same
files.

Tested that it builds and both `make check` and `make distcheck` work.

Tested `make install` and compared the tree with the one installed
before this commit, both installed the binaries to the same locations.
The binaries are also in the same location in the build tree (for
instance, ps/pscommand is still there.)

Checked the binaries for the correct libraries linked into them. Binary
sizes matched before and after this change.

Signed-off-by: Filipe Brandenburger <filbranden@google.com>
2015-05-01 23:19:31 -07:00
Filipe Brandenburger
90cc5460aa build-sys: add $(top_srcdir) to include search dir
This is required for out-of-tree build to work, since many source files
include e.g. proc/*.h which is not under the include/ directory.

Tested that `make distcheck` starts working after this patch.

Signed-off-by: Filipe Brandenburger <filbranden@google.com>
2015-05-01 17:09:55 -07:00
Tobias Stoeckmann
c7abb6a6ed top: correct a small typo in manual page
Reference(s)
http://www.freelists.org/post/procps/PATCH-typo-in-top1

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-04-07 20:46:15 +10:00
Jim Warner
e107f5d63b top: miscellaneous accumulated changes to program code
This commit just tweaks top in the following respects:

. for alphabetic integrity, change 'INSP_hdr...' names

. eliminate the -Wsometimes-uninitialized warning that
was found under OSX Yosemite (llvm 6.0/clang-600.0.56)

. update program 'comments' reflecting copyright dates

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-04-07 20:46:15 +10:00
Jim Warner
8bcdd2145d top: miscellaneous accumulated changes to man document
Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-04-07 20:46:15 +10:00
Jim Warner
da06b8fa59 top: tweak forest view protections for forking anomaly
A recent commit eliminated the potential for a storage
violation with forest view mode. It occurred when some
program (erroneously?) created a lengthy forking loop.
However, the associated commit message was misleading.

The message implied that an unexpected order following
a sort on start_time was the cause of storage overruns
and a 'char' used to track nesting level only distorts
the display when it goes negative. Actually, the truth
is really just the opposite. Any start_time sort quirk
causes no harm while that 'char' can yield corruption.

Should some child end up sorted ahead of its parent by
way of an extremely unlikely shared start_time the end
result is such a child will be displayed unnested just
like init or kthreadd along with all its own children.

However, if nesting levels exceeded 255 (and became 0)
a massive array overrun could be triggered when such a
task and *all* its children were added to an array for
the second time. Exactly how much storage was violated
depended on the number of children that zeroed process
had spawned (hinted at via either SIGSEGV or SIGABRT).

The earlier commit limited nested levels to 100 so the
root cause of the storage violation was already fixed.
The potential for distorted nesting levels due to sort
on start_time would seem to remain. But it's extremely
unlikely that 2 tasks would share the same start_time.

Even so, a new #define has been introduced which makes
top impervious to the order of tasks such that a qsort
is no longer necessary (providing an init/systemd task
exists & was harvested as the first task by readproc).
It can be utilized if distorted nesting ever becomes a
real issue. But since there is a 5-10% performance hit
with that, we'll continue using start_time as default.

References(s):
commit ce70017eb1

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-10-29 17:00:03 +01:00
Jim Warner
ce70017eb1 top: provide some protection against forking anomalies
This commit will eliminate a very nasty bug associated
with top's forest view mode.  It addresses a potential
SIGSEGV/SIGABRT that was only encountered when another
program (erroneously?) creates a lengthy forking loop.

If the growing list of nested children is sufficiently
fast such that proc_t start_time is duplicated between
children then the sort upon which top relies might not
produce the expected order. That, in turn, could cause
the forest_adds function to initially miss some child.

But that missed child would be caught by forest_create
and eventually would cause our array boundary overrun.
Such overrun occurs when some child of that originally
*missed* child is found and a duplicate add attempted.

In correcting this bug we'll also use this opportunity
to prohibit a borrowed proc_t padding byte (char) from
going negative. If the nesting level exceeded 127, the
effect was an "unnesting" with the snprintf width then
viewed as flag+width also yielding left justification.

Henceforth, we'll limit nesting to 100 with subsequent
children shown as " +  ", not the usual " `- " prefix.

References(s):
https://bugzilla.redhat.com/show_bug.cgi?id=1153642
http://www.freelists.org/post/procps/Bug-in-the-forrest-view,6

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-10-27 17:18:47 +01:00
Jim Warner
b0767bd391 top: ensure previously saved rcfile honored completely
When startup defaults were changed users with existing
rcfiles would likely find their previous configuration
was not being honored in all respects. The disparities
involved Graphs modes and Summary/Task memory scaling.

This patch simply restores what was always intended as
the proper behavior for previously saved config files.

References(s):
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=762928
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=762947
. new startup defaults
commit 8ef6cd91fc

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-09-29 08:22:13 +10:00
Jim Warner
8adf4acc03 top: final tweak to recent changes for new graph modes
Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-08-11 16:39:51 +02:00
Jim Warner
e92b692932 top: swat a potential buglet affecting new graph modes
This patch will cure a potential aberration associated
with a terminal's size (SIGWINCH) and top's new graphs
modes. The symptoms were a dangling tilde (~) plus the
potential loss of a graph's right-most visual content.

The condition was only apparent when a %Cpu approached
100% usage. Also the apparent loss of content affected
the 'block' graph only. With 'bar' graphs, that affect
became the loss of proper right-most bar graph colors.

The cause was determined to be a combination of: 1) an
unnecessary snprintf precision specification; and 2) a
rounding quirk for any graphs which displayed distinct
types of information (as for user/syst, used/unavail).
These could then combine to produce an extra bar/block
which, in turn, resulted in the truncation of a pseudo
termcap attribute used by the show_special() function.

What was originally interpreted as an intractable race
condition turns out to be just a self inflicted wound.

Reference(s):
http://www.freelists.org/post/procps/top-Possible-bug-in-the-graphs,1

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-08-08 22:14:21 +02:00
Fredrik Fornwall
dfe1f7d104 top: replace <values.h> with <limits.h> plus <float.h>
This fixes a compilation problem on Android which lacks values.h.

Reference(s):
https://gitorious.org/procps/procps/merge_requests/26

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-08-08 22:14:21 +02:00
Jim Warner
5380ef9022 top: adapt global memory support to new library format
Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-31 15:10:42 +02:00
Jaromir Capik
cbba7ad7a7 top: exclude reclaimable slabs from used 2014-07-22 14:07:45 +02:00
Jim Warner
c437faf8d3 library: evolve MenAvailable algorithm on older kernel
Let's not report zero for kb_main_available when older
kernels don't have MemAvailable. Instead, if we simply
duplicate the 'free' amount we can avoid all ancillary
problems, such as those involving top's graphing mode.

Reference(s):
http://www.freelists.org/post/procps/kb-main-available-etc,3

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-21 16:17:52 +02:00
Jim Warner
7391699b07 top: correct one grammatical error in the man document
Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-18 20:49:58 +02:00
Jim Warner
d310a18fc2 top: exploit new kb_main_available, make Jaromir happy
This patch will trade a former pessimistic calculation
of free physical memory for a more optimistic one that
uses the newly added kb_main_available library export.

But in case one might wish to return to the old former
method, there's a new #define that was made available.

[ the new calculation will affect graphing mode only ]

Reference(s):
http://www.freelists.org/post/procps/systemd-support-to-library,9

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-18 20:49:57 +02:00