Ordinarily, whenever a new field is added to top, that
RCF_VERSION_ID should be bumped which then prevents an
older version of top from reading the expanded rcfile.
With this change, however, we'll keep the existing 'k'
version since we've yet to release the newlib version.
Signed-off-by: Jim Warner <james.warner@comcast.net>
In the link referenced below there's an explanation of
the linux autogroup feature which has been around ever
since linux-2.6.38. With that explanation there's also
surprising (maybe shocking) revelations about the nice
and renice commands if CONFIG_SCHED_AUTOGROUP was set.
When autogroups are active, such programs are rendered
mostly useless because the nice value will only affect
scheduling priority relative to other processes in the
same autogroup. In order to accomplish what we thought
of as renice, that nice value in /proc/<pid>/autogroup
must be changed. Altering any single member of a group
will also affect every other member of that autogroup.
So, this commit will set the stage for users of newlib
to display autogroup identifiers plus their associated
nice values (now that their importance is understood).
Reference(s):
https://github.com/nlburgin/reallynice
Signed-off-by: Jim Warner <james.warner@comcast.net>
When several obsolete linux-2.6 fields were eliminated
and ps responded in the commit referenced below, there
was one reference overlooked. So, with this commit the
reference to PIDS_ALARM has been whacked at long last.
Reference(s):
. Sep 2016, ps response to removal
commit 86992bb58f
Signed-off-by: Jim Warner <james.warner@comcast.net>
As far back as release 3.2.8 (maybe even farther) this
man page used a number with each field's descriptions.
That practice caused no real harm when top was limited
to a grand total of 26 fields (thru lower case letters
of the alphabet). However, now we've reached 70 fields
and, depending on the name that's chosen, adding a new
field could result in a massive renumbering of fields.
Thus, this patch eliminates such potential by removing
all numbers from section '3a. DESCRIPTIONS of Fields'.
Signed-off-by: Jim Warner <james.warner@comcast.net>
The 'PROC_FILL' flags, found in readproc.h, had become
almost unmanageable. The hex values were scattered all
over the map as new flags had been introduced. So this
commit resets all of them and will help ensure any new
flags don't duplicate some already existing hex value.
Signed-off-by: Jim Warner <james.warner@comcast.net>
The commit shown below introduced two abreast printing
for %Cpu statistics. But, the Memory & Swap lines have
always been printed on separate lines when '4' was on.
With this commit, those lines will now be treated just
like %Cpu stats, either separate lines or two abreast.
Reference(s):
. May 2020, added '4' toggle for 2 abreast
commit 59f5a37a24
Signed-off-by: Jim Warner <james.warner@comcast.net>
When the '4' toggle is on, and Summary Area %Cpu lines
are shown two abreast, it's not always clear where the
separation is between the two processors. So with this
patch we'll now print a vertical bar separator between
them (looking similar to the existing field headings).
We will also reduce that 'GRAPH_suffix' constant to 1,
reflecting the the trailing ']' bracket only, so as to
maximize top's exploitation of available screen width.
[ plus a superfluous double '+ +' has now been fixed ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
As promised, this commit will ensure that TREE_FOCUS_X
impacts only the window under which an 'F' was issued.
Previously, when 'F' was invoked it would impact every
window that was displaying forest view. Now, only that
window where 'F' was applied will show the indentation
losses whenever multiple windows were being displayed.
[ each of the 4 windows can now have different focus ]
[ pids active and not impact any other forest views! ]
Reference(s):
. 'TREE_FOCUS_X' introduction
commit c23d2708d4
Signed-off-by: Jim Warner <james.warner@comcast.net>
For every function whose parameters consist of a WIN_t
pointer and a pointer to a pids_stack, we will instead
pass the WIN_t pointer and index to that window's ppt.
This change will save six instructions per invocation,
and converts the index once in those called functions.
[ you can consider this an efficiency change, but it ]
[ is really being implemented so that 'TREE_FOCUS_X' ]
[ #define can be made to behave as one should expect ]
[ when running under top's 'alternate display' mode! ]
[ stay tuned for the very next commit to be pushed!! ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
For some reason, when top was modified to exploit that
<pids> api, one function prologue was removed. So this
commit just restores it to the 'window_show' function.
Reference(s):
. Aug, 2015 - adapted to new <pids> api
commit 77dc22b910
Signed-off-by: Jim Warner <james.warner@comcast.net>
Just to see if I could, the new #define will force the
indentation of a parent task to be reset to zero while
maintaining the proper child indentation relationship.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Sometimes, it might be useful to isolate a parent task
and its forked children from other system activity. As
an example, a user might want to examine workload in a
specific lxc container. Or maybe there is some need to
question what's happening under the same tmux session.
Since forest view mode tends to be a relatively stable
display, it will sometimes satisfy the above need. But
that mode can't currently guarantee the target process
always remains as the topmost task or even is visible.
So, this patch will enable focusing on any parent task
and keeping it as the topmost process while displaying
it and its forked children only. It then appears as if
there is no other activity in that system by virtue of
the blank lines which follow that final child process.
To implement this new feature, top's redundant 'F' key
has been repurposed. It made little sense devoting two
keys to the Fields Management screen (especially since
the key we've taken required two separate keystrokes).
[ and while we're at it, i also added punctuation to ]
[ the prologue for that renamed 'forest_display' guy ]
[ since all other forest functions used punctuation. ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
Since the internally kept nesting 'level' under forest
view is limited to a maximum of 101, we will now treat
it as signed to avoid any potential conversion issues.
Signed-off-by: Jim Warner <james.warner@comcast.net>
When declaring a pointer there's usually a space after
the thing-pointed-to and no space between the asterisk
and the pointer-thingy itself. So this commit enforces
such conventions where needed on old library elements.
Signed-off-by: Jim Warner <james.warner@comcast.net>
If there are zero numa nodes then the View_CPUNOD flag
cannot possibly be set. So it was unnecessary to check
both the numa total and View_CPUNOD in 'summary_show'.
Signed-off-by: Jim Warner <james.warner@comcast.net>
This new #define will produce top results identical to
the results achieved for './configure --disable-numa'.
However it keeps the change entirely local to our top.
[ it has been introduced to test the following patch ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
These changes were already implemented for this newlib
version, but not in the the master branch top version.
[ and we also add the missing 3.3.17 ps 'exe' change ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
sysctl would try to read/write any path you gave it either on
the command line or configuration file. It would append /proc/sys
on the path but not check for any sneaky path traversal with ../
This commit means it first resolves all paths using realpath(3)
and then checks the path starts with "/proc/sys/"
At first I thought this might be a non-issue, but perhaps someone
could put a file into the sysctl configuration path and.. do
something? Anyway its a 8-line fix and makes things more correct.
References:
#179
Signed-off-by: Craig Small <csmall@dropbear.xyz>
In the merge request shown below, 1 too many bytes are
written to stdout thus including the terminating null.
As the cure, this commit just reduces the length by 1.
[ along the way, we will remove some unneeded braces ]
[ plus add some additional comments with attribution ]
Reference(s):
https://gitlab.com/procps-ng/procps/-/merge_requests/127
. original ported cchange
commit 6b8980a3b6
Signed-off-by: Jim Warner <james.warner@comcast.net>
Some time ago, IO accounting was added for the library
and exploited by the ps program. This patch just plays
a little catch-up & adds similar functionality to top.
[ and we also finally get around to incrementing the ]
[ rcfile id which should have already been done when ]
[ the smaps fields were added or, at least, with USS ]
Reference(s):
. added IO accounting to ps program
commit 8baf8eeab4
. added IO accounting to library
commit a7afe06e6f
Signed-off-by: Jim Warner <james.warner@comcast.net>
This patch just brings 'PIDS_IO' source into alignment
with the names being used in that /proc/<pid>/io file.
[ i had my chance to fix them in a whitespace change ]
[ made in the patch referenced below, but i blew it! ]
Reference(s):
commit 2dcbe71f3b
Signed-off-by: Jim Warner <james.warner@comcast.net>
We're just following the ps program's lead introducing
a new 'USS' field to represent the non-swapped portion
of physical memory ('RSS') not shared by another task.
Signed-off-by: Jim Warner <james.warner@comcast.net>
In that commit referenced below, a new field was added
to the ps program which required adding 2 newlib items
together. Such a need is now satisfied by the library.
So, this commit will just adapt ps for that provision.
Reference(s):
commit e782b1d859
Signed-off-by: Jim Warner <james.warner@comcast.net>
That recent addition of USS to the ps program prompted
this change. Rather than have it (and soon top) add 2
separate items to yield the desired value, we will let
our new library perform the arithmetic when necessary.
Outside of a little extra storage, there is no runtime
costs for such an extension. There is, however, a real
benefit to having such code in the library. Now should
callers choose to sort on this new field, results will
be guaranteed to be what was expected (i.e. accurate).
Signed-off-by: Jim Warner <james.warner@comcast.net>
In the patch referenced below, 2 potential abends were
fixed both of which involved 'alternate display mode'.
The root cause of those abends was a negative value in
the 'begnext' field for other than the current window.
And while that potential is fixed for now the existing
code almost invites such problems again in the future.
So, this patch will remove any temptation to name some
other window in the 'mkVIZrow1' macro. And, since that
macro is not the only source of 'begnext' changes, the
'mkVizrowX' is being added to identify such occasions.
[ and for symmetry i've added a 'mkVIZyes' macro and ]
[ ameliorated an otherwise surreptitious assignment! ]
Reference(s):
commit 8281ac4f98
Signed-off-by: Jim Warner <james.warner@comcast.net>
The library added smaps_rollup fields in the referenced commit.
This commit exploits the new fields to give pss and uss options.
These options were first proposed back in 2015 by Petr Malat
and, with the library update, they are finally made it into ps.
Why use proportional or unique segment size? It is argued that
these give a better idea of the "real" memory usage of a process.
References:
commit 12543b6c76
issue #112https://www.freelists.org/post/procps/PSS-and-USS-support-for-pshttps://lwn.net/Articles/230975/
Signed-off-by: Craig Small <csmall@dropbear.xyz>
- Simplify control flow a bit. We don't need two loop variables, either.
- Consistently use %lld for bytes.
- Fix the base handling for human-readable output. The code used to
calculate *mebibytes* first, then scale that to the required exponent
with the selected base, which is patently wrong.
Fixes https://gitlab.com/procps-ng/procps/-/issues/133
This commit will address potential abends upon leaving
the windows help or color mapping screens and invoking
alternate display mode ('A'). It only happens if that
current window was changed with multiple 'a'/'w' keys.
So now, rather than leaving a trail of negative values
in the 'begtask' field, compliments of that win_select
function, we'll remove the mkVIZrow1 macro. Henceforth
it will be issued just once per user interaction. Thus
a promise of 'Curwin' only being impacted is restored.
[ my thanks to Vladimir Chren for reporting this bug ]
Reference(s):
https://gitlab.com/procps-ng/procps/-/issues/210https://gitlab.com/procps-ng/procps/-/merge_requests/135
Discovered by:Vladimir Chren <vladimir.chren@gmail.com>
Signed-off-by: Jim Warner <james.warner@comcast.net>
in include/c.h we check if HAVE___PROGNAME is defined, but the
corresponding macro for setting (or not setting) it is missing from
the configure script. This commit adds the missing macro, by
copying it from the macro in tmux.
The two special hugetlbfs items were misnamed. The TBL
reference (table) should be TLB (transaction lookaside
buffer). Besides, I never liked their position anyway!
[ and one macro argument tweak is being snuck in too ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
[ of course, we had to renumber most existing fields ]
[ with these additions. plus, some typos were fixed. ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
My, how time flies. Here we are finally attending to a
2 year old issue at long last (well, at least top is).
In truth, this change was prompted by that more recent
issue #201 and simply represents my initial picks from
among those available with the new library provisions.
Note: we have to bump that rcfile version whenever new
fields are added. That will mean older top programs no
longer can read this top's rcfile. But that's Ok since
top offers a warning before replacing an older rcfile.
Doubtless, more smaps_rollup fields will be introduced
under top as we get more experience with this feature.
However, any such usage comes with tremendoud costs as
was reported for the previous patch and repeated here:
Here is a small preview of just what you will discover
when using this command line: time top/top -d0 -n1000.
------------------------------------ as a regular user
with only PID + RES (statm)
real 0m2.605s
user 0m1.060s
sys 0m1.377s
with only PID + RSS (smaps)
real 0m26.397s 10x more costly
user 0m1.253s
sys 0m24.915s
----------------- as a root (thus smaps for all tasks)
with only PID + RES (statm)
real 0m2.651s
user 0m1.177s
sys 0m1.286s
with only PID + RSS (smaps)
real 0m33.040s 12x more costly
user 0m1.256s
sys 0m31.533s
Reference(s):
. top/ps: add support for PSS reporting
https://gitlab.com/procps-ng/procps/-/issues/112
. ps: expose shared/private memory separately
https://gitlab.com/procps-ng/procps/-/issues/201
Signed-off-by: Jim Warner <james.warner@comcast.net>
A couple of people have suggested that smaps_rollup be
added to the ps program and/or top program. This patch
is intended to set the stage for just such extensions.
There are currently 20 displayable items in the rollup
file. And newlib sometimes uses sscanf when populating
the target, sometimes hsearch and one customized gperf
approach. None of these fit well with the smaps items.
Thus, an approach using a simple table lookup was used
and, by disabling 1 code line, it could be made immune
from changes to the items order (unlike a sscanf call)
and doesn't carry the greater cost of a hsearch/gperf.
Note: The next patch will allow top to display some of
these new fields. Then, it'll be possible to determine
the colossal costs of accessing the smaps_rollup file.
Here is a small preview of just what you will discover
when using the command 'time top/top -d0 -n1000' while
configured with just two fields: PID + 1 memory field.
------------------------------------ as a regular user
with only PID + RES (statm)
real 0m2.605s
user 0m1.060s
sys 0m1.377s
with only PID + RSS (smaps)
real 0m26.397s 10x more costly
user 0m1.253s
sys 0m24.915s
----------------- as a root (thus smaps for all tasks)
with only PID + RES (statm)
real 0m2.651s
user 0m1.177s
sys 0m1.286s
with only PID + RSS (smaps)
real 0m33.040s 12x more costly
user 0m1.256s
sys 0m31.533s
Reference(s):
. ps: expose shared/private memory separately
https://gitlab.com/procps-ng/procps/-/issues/201
. top/ps: add support for PSS reporting
https://gitlab.com/procps-ng/procps/-/issues/112
Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is strictly cosmetic. It was an attempt to
normalize/standardize/alphabetize those #define/#undef
statements. Some missing #undef's were added plus some
comments regarding sources corrected/standardized too.
Signed-off-by: Jim Warner <james.warner@comcast.net>
In anticipation of adding some smaps_rollup stuff, our
end-of-job report will now offer some insight into the
current unused entries for a window's fieldscur array.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Since 2.6.24/33 the kernel knows about guest and guest nice time. That
is the time that is spend in KVM guests. To handle userspace programs
that do not know about this the guest time is also added to user.
Let us provide a guest time column in vmstat that collects both guest
and guest nice into a gu value.
We also subtract that value from the user time as we are now aware of
the guest value.
This commit is different to !113 in several ways:
* newlib already knows about these to values
* vmstat summary already shows these values
* non-wide vmstat squishes the values
So its around the wide vmstat output.
References:
procps-ng/procps!113
Signed-off-by: Craig Small <csmall@dropbear.xyz>
The commit referenced below was well done but needed a
small whitespace tweak to preserve existing alignment.
Reference(s):
. io accounting added
commit a7afe06e6f
Signed-off-by: Jim Warner <james.warner@comcast.net>
