Jim Warner [Thu, 19 May 2016 05:00:00 +0000 (00:00 -0500)]
library: eliminated a final potential NULL, <PIDS> api
In that reference below a specific systemd problem was
fixed in the commit shown. However lurking deep within
the <pids> interface was yet one final case where NULL
could be returned, involving 'strv' and the following:
. a user requested both a single string vector (always
returned as a normal string) & the vectorized version,
as with PROCPS_PIDS_CMDLINE and PROCPS_PIDS_CMDLINE_V.
. a user simply duplicated some vectorized enum items.
The root of that NULL problem is the fact those single
string vectors shared the same proc_t field with their
true vectorized version. So while multiple occurrences
for most strings could be satisfied with strdup versus
the normal ownership usurpation, those true vectorized
fields could not be quite so easily copied/duplicated.
Thus newlib chose to return a NULL result.strv pointer
under either of the above scenarios (which perhaps was
just a user boo-boo in the first place). In any event,
the NULL was a potential for true string vectors only.
Now, since newlib is the sole caller into the readproc
module, separate fields have been created for what are
just normal strings (never vectorized) and those which
remain the true vectorized versions. And, former flags
which only worked if combined, now act as stand alone.
Thus, both PROCPS_PIDS_CMDLINE & PROCPS_PIDS_CMDLINE_V
can be used simultaneously (as they should have been).
Also with this patch, items which a user duplicates in
the stack (beyond the first such item) will return the
the string "[ duplicate ENUM_ID ]". This practice will
apply to both single strings and true vectorized ones.
In addition to informing users of their error, it will
also mean potential NULLs need now never be a concern.
Jim Warner [Mon, 16 May 2016 19:14:14 +0000 (14:14 -0500)]
library: respond to coverity (reluctantly), <PIDS> api
Calls to free() have now been reintroduce in the new()
function to quiet coverity warnings. Those free's were
removed originally as that library 'new' was returning
with a fatal error and a caller should end abnormally.
Plus, it is virtually impossible to fail a malloc call
under linux. And lastly, they required braces with the
if statement making the code considerably less pretty.
[ commit also includes 2 unrelated whitespace tweaks ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Mon, 16 May 2016 11:06:06 +0000 (06:06 -0500)]
library: avoid any --with-systemd conflict, <PIDS> api
A potential conflict arises should should some program
attempt to access systemd data using our library built
without that support (--disable-systemd). And while we
could argue that all callers should check against NULL
string pointers, it's not expected of libprocps users.
So we'll guarantee 'em valid string consisting of "?".
Craig Small [Mon, 16 May 2016 10:03:11 +0000 (20:03 +1000)]
vmstat: sys variables are unsigned longs
When the API changed for the use_format the type changed for the
system variables out of stat, but the printf format was not changed
along with it.
vmstat.c:868:14: warning: format ‘%lld’ expects argument of type ‘long
long int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
printf(_("%13lld interrupts\n"), SYSv(sstat_INT));
Jim Warner [Mon, 16 May 2016 05:00:00 +0000 (00:00 -0500)]
pmap: finally silence a warning without creating a bug
The patch referenced below silenced an 'uninitialized'
compiler warning but it also created a bug where zeros
appeared under the Address column with that -x option.
So this commit swats that bug and avoids any warnings.
[ while yours truly created that bug, in his defense ]
[ let's at least acknowledge the god awful loop code ]
[ which was the root of the problem & wrong solution ]
[ so the ugliness of this most recent solution is in ]
[ perfect harmony with the *really* ugly loop itself ]
Jim Warner [Sun, 15 May 2016 05:00:00 +0000 (00:00 -0500)]
library: try different alignment for types, <PIDS> api
Rather than adopt an approach offered below, involving
changing all enumerator names to convey types, perhaps
this much more modest change is a worthwhile 1st step.
By just changing the comments to 'right justification'
it dramatically improves readability, at least it does
to my eye. Perhaps such an approach can postpone that
massive alternative effort for the foreseeable future.
Jim Warner [Sun, 15 May 2016 05:00:00 +0000 (00:00 -0500)]
library: try to minimize the results types, <PIDS> api
This is just beginning an effort to minimize/normalize
the sheer variety of results types in use for our API.
In taking these first baby steps, a few anomalies were
found. There'll no doubt be many more yet to discover.
. the _FLT_ (fault) fields were already signed long in
the proc_t (even though their sscanf format used %lu).
. although strtoul will alway return an unsigned long,
all of the _VM_ fields were made signed long just like
other memory fields (& signed sorts more efficiently).
Jim Warner [Sat, 14 May 2016 05:00:00 +0000 (00:00 -0500)]
library: standardize portions of interface, <PIDS> api
This represents a rather major interface redesign. The
following highlights most of the changes/enhancements.
. The 'read' interface (employed by pgrep & pidof) saw
the biggest change. The 'open', 'next' and 'shut' guys
all went bye-bye, replaced by a single 'get' function.
. The items specified at 'new' time no longer serve as
the maximum. In fact, items & numitems are now treated
as optional, should callers prefer to wait until later
when the 'reset' function would then become mandatory.
. Even at 'reset' time, the stacks are not tied to any
sort of maximum. They will grow dynamically as needed.
. The order of some parameters was changed to parallel
that found in our other APIs. Specifically, when items
& numitems are needed they're specified in that order.
. A user will no longer be prevented from concurrently
employing any accessor functions. In other words, that
'get' (old 'read') won't preclude 'reap' and 'select'.
. A duplicate enumerator was found dealing with locked
resident pages. So, the name VM_LOCK was eliminated in
favor of VM_RSS_LOCKED, which is way more descriptive.
. The struct address returned to callers following any
reap() or select() is now more sharable as pids_fetch.
. Some input parameter names were changed to make them
more descriptive of the intended purpose/requirements.
------------------------------------------------------
Internally, there were numerous implementation changes
made that did not directly impact any potential users.
. That #define FPRINT_STACKS was eliminated along with
the associated supporting function and its invocation.
. Addresses returned following 'reap' or 'select' will
now be NULL delimited, so one has the option of stacks
access via the total count or this new NULL fencepost.
. Input params were simplified and generalized in both
oldproc_open() & close() to enable more than 1 PROCTAB
to be open simultaneously, which was required for get.
. The PROCPS_PIDS_logical_end enum was relocated after
the Item_table making the need to keep it synchronized
more apparent (if the table expands it's right there).
. The 'Public function' section of the source file was
subdivided into 1) the three basic required functions;
and 2) functions that can sometimes vary between APIs.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Craig Small [Sat, 14 May 2016 12:43:19 +0000 (22:43 +1000)]
library: Remove dead branch in file2strvec
A while loop used n >=0
A branch inside the loop had a test for n<0
That's never going to happen!
So the branch must go. There is similiar code outside
the branch. Yes, I miss pythons while else here.
Also cleaned up the ***-awful indentation this function had.
No wonder that branch lived for so long there.
Craig Small [Sat, 14 May 2016 06:28:47 +0000 (16:28 +1000)]
vmstat: use_format use new stat select
While new_format was using the new stat select feature the
use_format did not. This type of format now uses the select setup
for both the meminfo and stat set of information.
Jim Warner [Thu, 12 May 2016 05:00:00 +0000 (00:00 -0500)]
library: remove the ull_int result type, <MEMINFO> api
Because of the vast quantities of virtual memory which
may be allocated, it initially seemed like a good idea
to provide for a widest possible range through the use
of a 'ull_int' result type. However, on second thought
the implementation was a bit flawed for these reasons:
. that underlying meminfo_data variable 'VmallocTotal'
is 'unsigned long' not a required 'unsigned long long'
. there wasn't a convenient way to value it since each
variable was set with a strtoul() call, not strtoull()
So this patch will standardize on the 'ul_int' results
type (and reduce the associated delta to 's_int' too).
For now, we'll rely on protections under a 64-bit arch
where a 'ull_int' & 'ul_int' yield identical capacity.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Wed, 11 May 2016 23:18:18 +0000 (18:18 -0500)]
library: allow negative delta values for 2, <STAT> api
A recent buglet in the <meminfo> interface, where many
delta values could legitimately be negative, suggested
a review of this module where a minus was forced to 0.
As it turns out, there are two delta items that indeed
could be negative. They involve the current processes.
So henceforth, DELTA_PROC_BLOCKED & DELTA_PROC_RUNNING
will now be allowed to go negative. I believe that all
other items can only grow. But, if we find more later,
at least the adaptation approach has been established.
[ this whole business of checking for less than zero ]
[ harks back to an old kernel anomaly where negative ]
[ tics were sometimes experienced. top was affected. ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Wed, 11 May 2016 22:17:17 +0000 (17:17 -0500)]
library: ain't like your father's delta, <MEMINFO> api
When the code for DELTA values (among other stuff) was
stolen from the recently revised <stat> interface, the
concept of ever growing values was propagated too. But
here we must manage both growing and shrinking values.
Thus former protections against a negative delta don't
have any place in this module and are hereby banished.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Craig Small [Thu, 12 May 2016 10:43:49 +0000 (20:43 +1000)]
ps: Output of nwchan is a number
For some time with enough compilier flags I have watched the
following warning drift by:
ps/output.c: In function ‘pr_nwchan’:
ps/output.c:658:41: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
return snprintf(outbuf, COLWID, "%x", (unsigned)rSv(WCHAN_NAME, str, pp));
nwchan is supposed to be the address of where the process is sleeping,
not the name. Besides %x is a hex number not a string hence the warning.
nwchan now prints the address, in hex and GCC is happy.
Craig Small [Wed, 11 May 2016 21:52:36 +0000 (07:52 +1000)]
library: minor fix for procps_meminfo_select
Thus function returns a pointer, not an int, so if there is
an error return NULL and not -errno.
proc/meminfo.c: In function ‘procps_meminfo_select’:
proc/meminfo.c:994:20: warning: return makes pointer from integer
without a cast [-Wint-conversion]
return -ENOMEM;
Jim Warner [Wed, 11 May 2016 17:00:00 +0000 (12:00 -0500)]
library: improve/normalize an interface, <MEMINFO> api
This represents the refinement of this interface after
the <stat> API was redesigned. We now follow a pattern
of 'get' for single item retrieval & 'select' for when
multiple items are desired, with just 1 function call.
And again following the <stat> lead this interface now
provides for delta values encompassing most items. The
reason I went cuckoo nuts with those deltas is because
they are essentially free. At the cost of a little RAM
and just one memcpy there's no other price to be paid.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Tue, 10 May 2016 05:00:00 +0000 (00:00 -0500)]
library: lift item restrictions on 'get()', <STAT> api
In the commit referenced below it was acknowledged the
procps_stat_get() function will intentionally restrict
returned values by excluding DELTA items among others.
Upon reflection that decision seemed rather arbitrary,
and so has now been lifted. And, while the initial use
of a DELTA will return 0, subsequent calls to that get
function will now return the difference (providing one
second, at least, has elapsed between any such calls).
Jim Warner [Tue, 10 May 2016 05:00:00 +0000 (00:00 -0500)]
library; add more of my gratuitous changes, <STAT> api
This commit is just my usual tweaking after an initial
submission, once the dust has settled & some more desk
checking was performed. Here are the changes included:
. get function need not check the 'stat_was_read' flag
( first time in save_sec == 0 so branch always taken )
. some table logic appeared outside the proper section
. cleanup_stack's loop made to work like assign_result
. eliminated an include of procps.h from stat.h header
. removed 'ext_numitems' from the stacks_extent struct
. changed the alignment of three prototypes for stat.h
. reorganized the pointers for 'stacks_extents' struct
. improved types indentation in header for readability
. lastly, some really gratuitous changes made to align
- comments within that private 'stacks_alloc' function
Signed-off-by: Jim Warner <james.warner@comcast.net
Jim Warner [Fri, 6 May 2016 05:00:00 +0000 (00:00 -0500)]
misc: adapt additional programs to changes, <STAT> api
This patch brings the ps program (very small impact) &
that vmstat program (major impact) into agreement with
the new <stat> API. In the case of the latter guy, the
many separate calls to 'get' should be replaced by one
single 'select' call obtaining all data in one stroke.
[ but, i was too tired to undertake that enhancement ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Fri, 6 May 2016 05:00:00 +0000 (00:00 -0500)]
top: adapted this program to those changes, <STAT> api
This guy is the real beneficiary of the new <stat> API
especially when it comes to the DELTA items which were
really the only values of interest (beyond some id's).
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Fri, 6 May 2016 05:00:00 +0000 (00:00 -0500)]
library: improve/standardize one interface, <STAT> api
This commit represents a complete redesign of the stat
interface. Gone are the confusing 8 separate accessors
along with their 2 additional read functions. In their
place we have just 3 accessors, with no read required.
That old interface also suffered an inflexibility with
respect to structures. Now we deal with an unchanging
standard 'result' struct enabling future changes where
the binary interface will no longer need to be broken.
And gone is that former unnecessary typedef, used when
dealing with jiffies. Now the standard C type is used.
Our new API also adds some brand new functionality. If
a caller plans to employ successive 'select' or 'reap'
invocations, then delta values are available (which is
actually only what that top program is interested in).
At some future point a 'sort' function could be easily
introduced to complement the 'reap' function. However,
I saw no need for it at present and so it was omitted.
There were several design decisions which everyone may
not agree with. In support I'll offer these rationals:
. The 'get' function returns a signed long long result
which means a potential loss of some significance. But
I felt the ability to distinguish actual errors (minus
values) from true zero results were worth such a risk.
. The DELTA item enumerators were also made signed and
smaller than their parents. And they are intentionally
grouped as last so as to emphasize those distinctions.
. The SYS type items were excluded from the new 'reap'
function. It would not make sense to duplicate them in
each results stack. They're limited to 'get'/'select'.
. By the same token, some items (DELTA, etc.) will not
be allowed under that 'get' routine. That function was
already open to significant internal overhead (through
subsequent calls like in vmstat.c). That is why it has
been limited via 1 second between reads of /proc/stat.
Lastly, when we finally get around to documenting this
interface there's a real potential toe stubber when it
comes to the numa node portion. The libnuma.so doesn't
really provide any means to retrieve the active nodes.
Thus, any total reported by <stat> is just the highest
node number plus one, as reported by the numa library.
Any unused/inactive nodes are identified through these
. PROCPS_STAT_TIC_ID shows as PROCPS_STAT_NODE_INVALID
By the same token after the STAT_REAP_CPUS_ONLY 'reap'
. PROCPS_STAT_TIC_NUMA_NODE = PROCPS_STAT_NODE_INVALID
Jim Warner [Thu, 28 Apr 2016 05:00:00 +0000 (00:00 -0500)]
library: remove an obsolete 'jiffs' typedef in sysinfo
During work on the new <stat> interface the typedef of
jiffs was eliminated along with the clang warning. The
exact same warning in sysinfo.h now goes bye-bye also.
Reference(s):
./proc/sysinfo.h:16:28: warning: redefinition of typedef 'jiff' is a C11 feature [-Wtypedef-redefinition]
typedef unsigned long long jiff;
Signed-off-by: Jim Warner <james.warner@comcast.net>
Craig Small [Sun, 1 May 2016 06:50:25 +0000 (16:50 +1000)]
library: procps_uptime() return value is a status
procps_uptime, previously just plain uptime() used to put the
uptime (as a double) in the first argument and return uptime
(as an int).
It meant if you ran
myuptime2 = procps_uptime(&myuptime1, NULL);
You might get different results for myuptime1 and myuptime2 because
they are different types.
Most library calls use the return value to return the status,
procps_uptime was in the middle.
Until now.
This function will return 0 on success. If you want (for whatever
reason) uptime as an int then cast it.
All of the procps binaries didn't use the return value for uptime
except ps which set a variable to it but never used it anywhere.
Craig Small [Sun, 1 May 2016 06:15:49 +0000 (16:15 +1000)]
library: provide ref and unref for diskstat
While procps_diskstat_ref and procps_diskstat_unref were declared
they actually weren't implemented in the library. Linking some
binary that used these functions gave the following errors:
CCLD vmstat
vmstat.o: In function `disksum_format':
vmstat.c:719: undefined reference to `procps_diskstat_unref'
vmstat.o: In function `diskformat':
vmstat.c:591: undefined reference to `procps_diskstat_unref'
Jim Warner [Mon, 25 Apr 2016 05:00:00 +0000 (00:00 -0500)]
top: adapt source to changes with includes, <STAT> api
All other programs were able to accommodate the change
in name from readstat.h to stat.h without modification
because they were all using that procps.h header file.
Well now top can too (providing you ignore a comment).
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Mon, 25 Apr 2016 05:00:00 +0000 (00:00 -0500)]
library: rename those readstat.c & h sources to 'stat'
In an attempt to normalize the 'stat' interface, we'll
first shed any reminders of the old readproc interface
by changing file names to be more descriptive & brief.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Mon, 25 Apr 2016 05:00:00 +0000 (00:00 -0500)]
library: fix boo-boo left by earlier patch, <PIDS> api
After the commit referenced below the potential exists
for a SEGV (resulting from an out-of-bounds Item_table
reference if PROCPS_PIDS_physical_end is encountered).
So this patch eliminates that PROCPS_PIDS_physical_end
as no longer necessary and completes the task of using
PROCPS_PIDS_logical_end as a sole necessary fencepost.
Craig Small [Mon, 25 Apr 2016 10:24:20 +0000 (20:24 +1000)]
library: fix order of operations for %use of slabinfo
In some environments, 100 * nr_active_objs is calculated at first,
and lower 32bit of the result is divided by nr_objs.
If 100 * nr_active_objs > 42949672, %use will be incorrect.
Reported by Takayuki Nagata <tnagata@redhat.com> and adopted
his patch for new library (see reference)
Jim Warner [Mon, 18 Apr 2016 05:00:00 +0000 (00:00 -0500)]
library: protect against a future breakage, <pids> ABI
By co-mingling both external/internal identifiers with
actual implementation code, potential future additions
to our API would have been considerably more difficult.
So, this patch will now rely solely on internal/hidden
identifiers serving as fenceposts in validation logic.
And if the following convention is used for new fields
we will maintain that enumerator alphabetic ordering a
a little longer (even though 2 user fields now don't):
. PROCPS_PIDS_XTRA_FOO_A, PROCPS_PIDS_XTRA_FOO_B, etc.
Craig Small [Sun, 17 Apr 2016 06:55:44 +0000 (16:55 +1000)]
pidof: check cmd if space in argv0
A difference in behaviour between the sysvinit and procps pidof
was that the procps one would sometimes not find process that
the sysvinit one did.
The difference is that if a space is found in argv[0] then sysvinit
would look at cmd for a match. This isn't perfect and more of a
best guess but does often work.
procps pidof now follows the same "standard". The most obvious
difference is with kde based processes and incoming ssh connections
with sshd.
Craig Small [Sun, 17 Apr 2016 04:45:19 +0000 (14:45 +1000)]
library: re-arrange escape commands
escaped_copy(): only appears in ps, moved to ps/output.c
escape_strlist() only used in escape.c made static
escape_command() used in library, made internal
procps.h no longer includes escape.h
escape_str() used by library and ps so needs to be exported
definition put into procps.h including the odd define required.
Far from ideal to have it this way, will look at it another time
to have it all in, all out or split nicer so its not in the API;
perhaps a lib/ file?
Craig Small [Sun, 17 Apr 2016 04:14:27 +0000 (14:14 +1000)]
library: cleanup of readproc functions
readproc still had some of the old API hanging around that
was good while we were trying it out, but its time to say
goodbye:
readproc.h removed from public procps.h header file
enum ns_type - not used - removed
get_ns_name() - not defined - removed
get_ns_id() - not defined - removed
PROCTAB proc_t only used internal to library
readproctab() and 2,3 friends not used - removed
proc_data_t was used by readproctab23() - removed
readtask() - not used - removed
read_cmdline() - copy,renamed and made generic - remove original
freeproc() - not used - removed
get_proc_status - not used - removed, however there should be
a new function created that does this. Given a PID return data
about it instead of scanning the entire procfs. Maybe it already does.
Left as internal-to-library only functions:
readproc(), readeither(), look_up_our_self(), openproc(), closeproc()
Jim Warner [Sat, 16 Apr 2016 05:00:00 +0000 (00:00 -0500)]
top: some minor tweaks against a few of Craig's tweaks
Rather than importing NORETURN & MALLOC, it feels more
natural to use the native gcc attribute for NORETURN &
eliminate the use of a questionable MALLOC altogether.
Jim Warner [Fri, 15 Apr 2016 05:00:00 +0000 (00:00 -0500)]
top: extend 'zero suppression' to out-of-memory fields
Now that the conditional OOMEM_ENABLE has been removed
and more attention recently paid to the 2 oomem fields
it was revealed that Rc.zero_suppress didn't extend to
them. So this commit will just correct that oversight.
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.
Jim Warner [Fri, 15 Apr 2016 05:00:00 +0000 (00:00 -0500)]
top: normalize 2 former SUSE only out-of-memory fields
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.
But before doing so, it's long past time that they are
normalized to at last remedy this kind of foolishness:
. excessive width on that oomem score itself (8 vs. 4)
. some potentially confusing names inherited from suse
Jim Warner [Fri, 15 Apr 2016 05:00:00 +0000 (00:00 -0500)]
library: trade a deprecated oomem field for proper one
Now that the conditional OOMEM_ENABLE has been removed
and, after reviewing current library support, it turns
out we've been using a deprecated /proc/<pid>/oom_adj.
What we should use instead is that more recent tunable
/proc/<pid>/oom_score_adj. This new field will provide
a range of -1000 thru +1000 (former was -17 thru +15).
Craig Small [Sat, 16 Apr 2016 07:03:57 +0000 (17:03 +1000)]
library: cleanup of library includes
The includes used to define a lot of things a library include
should not. It was also a bit messy what was exposed in the library
and what was not.
get_pid_digits -> procps_pid_length and exported correctly
MALLOC attribute move into relevant .c files
NORETURN attribute moved to relevant .c, not used in library
PURE attribute removed, it wasn't used
KLONG/KLF/STRTOUKL were fixed for long, so now just use long
HIDDEN attribute removed. It was for 3 functions. The PROCPS_EXPORT
seems to do the same (opposite) thing.
likely/unlikely removed from most places, its highly debateable
this does anything useful as CPUs have gotten smarter about branches.
Re-arranged the includes, ALL external programs should just #include
<proc/procps.h> then proc/procps.h includes headers for files that
have exported functions. procps.h and the headers it includes should
not use items that are not exportable (e.g. hidden functions or
macros) they go in procps-private.h
Craig Small [Fri, 15 Apr 2016 22:34:08 +0000 (08:34 +1000)]
docs: Cleanup procps_linux_version page
Getting the manual page for procps_linux_version(3) fixed up so
it follows the man-pages(7) and other standards.
Added lgpl license to file, so its the same as the code.
If SELINUX is enabled but the machine is using another MAC system
(like apparmor), ps will fallback to just parsing
"/proc/%d/attr/current", otherwise the label/context would not
be properly displayed in that case.
Craig Small [Thu, 14 Apr 2016 11:21:27 +0000 (21:21 +1000)]
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.
Jim Warner [Wed, 13 Apr 2016 05:00:00 +0000 (00:00 -0500)]
top: man page now includes resident memory enhancement
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
This patch just represents the initial library and top
support, sharing a commit message with 2 more patches.
p.s. locked resident memory support was also added but
isn't directly related to the kernel 4.5 enhancements.
Jim Warner [Wed, 13 Apr 2016 05:00:00 +0000 (00:00 -0500)]
top: exploit new linux-4.5 resident memory enhancement
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
This patch just represents the initial library and top
support, sharing a commit message with 2 more patches.
p.s. locked resident memory support was also added but
isn't directly related to the kernel 4.5 enhancements.
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
This patch just represents the initial library and top
support, sharing a commit message with 2 more patches.
p.s. locked resident memory support was also added but
isn't directly related to the kernel 4.5 enhancements.
Emanuele Aina [Tue, 9 Feb 2016 22:02:31 +0000 (23:02 +0100)]
pmap: Fix detail parsing on long mapping lines
If the mapping descriptor is longer than 128 chars, the last parsed
character won't be a newline even if the current buffer contains it a
bit further than that. The current code always interprets it as a short
fgets() read instead, and thus keeps calling fgets() until it gets a
newline, dropping valid lines and failing with the following error:
pmap: ERROR: inconsistent detail field in smaps file, line:
Rss: 212 kB
Craig Small [Sun, 3 Jan 2016 07:20:45 +0000 (18:20 +1100)]
testsuite: kill test fails on signal names
Some archs have + and - in their signal names, such as hppa
which comes with signals such as RTMIN+-9 RTMIN+-8
The kill -l test failed because of this, we now accept these
odd names.
Jim Warner [Thu, 17 Mar 2016 05:00:00 +0000 (00:00 -0500)]
top: add additional memory information to the man page
[ patch has been adapted expressly for newlib branch ]
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 ]
Jim Warner [Mon, 14 Mar 2016 06:00:00 +0000 (00:00 -0600)]
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>
Jim Warner [Wed, 10 Feb 2016 06:00:00 +0000 (00:00 -0600)]
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.
Mike Frysinger [Mon, 7 Mar 2016 20:36:59 +0000 (15:36 -0500)]
enable transparent large file support
Historically LFS mattered only to open/read large files. A few programs
here use open/seek, but not generally on files that are large. However,
LFS also applies to stat which procps does in a bunch of places -- some
filesystems have 64bit inodes and attempts to do a 32bit stat will throw
an error.
Craig Small [Thu, 3 Mar 2016 10:24:08 +0000 (21:24 +1100)]
A locale-independent strtod
There is a need in some utilities to have a way of accepting both
types of decimal points "." and ",". The only way seems to be to
rebuild strtod().
This new function will accept "123.456" and "123,456" as 123.456
and considers them the same number. It means we lose thousands
separator, but this is rarely used.
test scripts are added to check the function returns the proper
values. There was simpler predecessor that got stuck on negative
0 or -0.123 which these tests flushed out.
Jim Warner [Sat, 24 Oct 2015 05:00:00 +0000 (00:00 -0500)]
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>
Jim Warner [Fri, 23 Oct 2015 05:00:00 +0000 (00:00 -0500)]
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>
Jim Warner [Thu, 22 Oct 2015 05:00:00 +0000 (00:00 -0500)]
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>
Jim Warner [Wed, 21 Oct 2015 05:00:00 +0000 (00:00 -0500)]
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>
Jim Warner [Sun, 25 Oct 2015 05:00:00 +0000 (00:00 -0500)]
library: correct <pids> support of true string vectors
When reference counts were added to some string fields
the 3 true string vector fields were not duplicated as
were those other fields. Instead they were supposed to
disallow a duplicate stack reference beyond the first.
However, the actual implementation gave NULL for every
true vector field whenever such items were duplicated.
More importantly, such true string vector fields never
considered references to the shared proc_t source root
which would have forced the conversion of such vectors
into a single string form via the '_CVT' library flag.
So this commit restores the intended outcome with true
string vectors. There's only 1 valid reference allowed
and duplicates and converted fields will yield a NULL.
Signed-off-by: Jim Warner <james.warner@comcast.net>
projects / procps-ng / log