pidin

Display system statistics (QNX Neutrino)

Syntax:

pidin [options] shorthand

Runs on:

Neutrino

Options:

The options are:

-d delay

Delay, in tenths of a second. The default is 10.

-F formats

A combination of format letters, like the format string for printf(). Like printf(), you can specify the width for a field by including a number with the format, such as "%I %60N".

Format	Description
A	Arguments
a	Process ID
B	What you're blocked on; see “Values in the Blocked column,” below.
b	Thread ID
c	Code size of the process
d	Data size of the process
E	Environment
e	Parent PID
f	Process flags (see the flags shorthand below)
H	Scheduling-specific information for each thread. For adaptive partitioning scheduling, it's the name of the partition that the thread is running in. For more information, see the Adaptive Partitioning User's Guide. This formatting code was added in the QNX Neutrino Core OS 6.3.2.
h	Thread name; if a thread doesn't have a name, pidin displays the thread's ID (tid) instead. This formatting code was added in the QNX Neutrino Core OS 6.3.2.
I	PID and TID
i	Runmask and inherit mask. This formatting code was added in the QNX Neutrino Core OS 6.3.2.
J	State of the thread; see “Thread life cycle” in the QNX Neutrino Microkernel chapter of the System Architecture guide
K	What kernel call was executed last
l	(“el”) The last CPU the thread ran on
M	Memory owned by the PID
m	Stack size of the process
N	Short name of the process
n	Long name of the process
o	Connection IDs and file descriptors associated with the process (see the fds shorthand below) This formatting code was added in the QNX Neutrino Core OS 6.3.2.
P	(Uppercase “P”) parent group
p	(Lowercase “p”) thread priority
Q	Interrupt handlers
q	Backtrace of calling routines. For best results, use this format with the I format. This formatting code was added in QNX Neutrino 6.4.0.
R	Timers
S	Signal ignore mask
s	Signal queued mask
T	Number of threads
[	Lengths of the send, receive, reply and pulse queues. This formatting code was added in QNX Neutrino 6.4.0.

If you don't specify a format, the default is "%a %b %N %p %J %B".

The letter following the scheduling priority number stands for the scheduling algorithm used, as follows:

• f — FIFO scheduling
• r — round-robin scheduling
• o — other (currently, same as round-robin scheduling)
• s — sporadic scheduling

For more information on these scheduling algorithms, see “Thread scheduling” in the System Architecture guide.

-f formats

The same as the -F option, but the formats parameter is a contiguous string of format codes that gets expanded. For example, -f mbe is expanded to -F "%m %b %e".

-h

Display a brief usage message.

-k

Keep printing out data for PIDs and TIDs until an error occurs, for example, encountering a PID/TID in an unknown state (because the PID/TID is partially alive).

-l

Loop mode; display statistics every delay tenths of a second (specified with the -d option).

-M formats

A combination of format letters, like the format string for printf(), that controls the formatting of information about memory regions. The formats include:

Format	Description
<	Memory object code size
=	Memory object data size
>	Memory object address
?	Memory object offset
M	Memory owned by the PID
: (colon)	Memory object name
; (semicolon)	Offset

If you don't specify a format, the default is the empty string, "".

-n node

The name of the remote node from which to get the information.

-o prio

Run at prio priority.

-P pid

Show only the process family you're interested in (pid may be a name or number).

-p pid

Show only the process you're interested in (pid may be a name or number).

---

If the pid is a number, it's interpreted as a process ID; otherwise, it's interpreted as a name. Don't assign a numerical name to a process.

---

The shorthand name is one of the following. You need to type only as many characters of the name as are required to uniquely identify it.

arguments

Show the arguments of the displayed processes.

backtrace

Display backtrace information for each thread in the displayed processes. For example:

$ pidin -p devc-con-hid back
pid-tid     backtrace
    4103-01 b033ab5b:b03323cb:b03324f3:804f6ed:804c120:804a285
    4103-02 b033af63:805ca60:b031f0ad
  

The output includes the process ID hyphenated to the thread ID, followed by a backtrace of the addresses of the calling routines.

---

The backtrace shorthand was added in QNX Neutrino 6.4.0.

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channels

Display the lengths of the send, receive, reply and pulse queues. This shorthand is useful if you're trying to track pulse leaks — that is, a process not receiving pulses. This can cause a growth in kernel memory usage, since pulse structures are allocated in the kernel.

---

The channels shorthand was added in QNX Neutrino 6.4.0.

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environment

Show the environment of the displayed processes.

extsched

Display details of the active extended scheduler configuration.

For the adaptive partitioning scheduler, this is one line of global configuration and then one line for each defined partition (showing the name, budget, critical budget, and overload notifications). For more information, see the Adaptive Partitioning User's Guide.

---

The extsched shorthand was added in the QNX Neutrino Core OS 6.3.2.

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family

Show the sessions, process groups, parents, siblings, and children of the displayed processes.

fds

Show information about the process's connections and file descriptors. If you don't have permission to access them, pidin provides only limited information.

---

The fds shorthand was added in the QNX Neutrino Core OS 6.3.2.

---

The information for each connection and file descriptor includes the following:

• the file descriptor, followed by s if it's a side channel
• the ID of the process the connection is to
• open flags (r or -, followed by w or -), or MP for a mountpoint
• the offset
• the name of the file or device, if available.

flags

Show the processes' flags in hexadecimal, as follows:

Flag	Value
_NTO_PF_NOCLDSTOP	0x00000001
_NTO_PF_LOADING	0x00000002
_NTO_PF_TERMING	0x00000004
_NTO_PF_ZOMBIE	0x00000008
_NTO_PF_NOZOMBIE	0x00000010
_NTO_PF_FORKED	0x00000020
_NTO_PF_ORPHAN_PGRP	0x00000040
_NTO_PF_STOPPED	0x00000080
_NTO_PF_DEBUG_STOPPED	0x00000100
_NTO_PF_BKGND_PGRP	0x00000200
_NTO_PF_NO_LIMITS	0x00000400
_NTO_PF_CONTINUED	0x00000800
_NTO_PF_CHECK_INTR	0x00001000
_NTO_PF_COREDUMP	0x00002000
_NTO_PF_PTRACED	0x00004000
_NTO_PF_RING0	0x00008000
_NTO_PF_SLEADER	0x00010000
_NTO_PF_WAITINFO	0x00020000
_NTO_PF_VFORKED	0x00040000
_NTO_PF_DESTROYALL	0x00080000
_NTO_PF_NOCOREDUMP	0x00100000
_NTO_PF_NOCTTY	0x00200000
_NTO_PF_THREADWATCH	0x80000000

info

Display information about the system, such as the type of processor(s) and the amount of free memory.

irqs

Show the IRQ handlers owned by the process. For each handler, pidin shows:

• id — the interrupt ID returned by InterruptAttach() or InterruptAttachEvent()
• vector — the interrupt vector passed to InterruptAttach() or InterruptAttachEvent()
• mask_count — the mask level count
• flags — the interrupt flags. Valid flags include:
  • T—_NTO_INTR_FLAGS_TRK_MSK
  • P—_NTO_INTR_FLAGS_PROCESS
  • E—_NTO_INTR_FLAGS_END
• handler:area — the address of the interrupt handler and the interrupt handler area
• event — a description of the sigevent to be delivered. Valid descriptions include:
  • SIGNAL— signo
  • SIGNAL_CODE—signo code:value
  • SIGNAL_THREAD—signo code:value
  • PULSE—coid:priority code:value
  • UNBLOCK
  • INTR
  • THREAD—code:value

mapinfo

Show information about memory mappings. The output looks like this:

4101   8 proc/boot/io-usb    10o RECEIVE           80K  424K   4096(20K)
         libc.so.3          @b0300000             452K   16K
         devu-uhci.so       @b8200000              24K  4096
         devu-ohci.so       @b8207000              24K  4096
         devu-ehci.so       @b820e000              28K  4096
         Mapped Phys Memory @40100000 (ee000000)         12K  S
  

It includes:

• the memory object's name, or Mapped Phys Memory for mapped physical memory
• the memory object's address, followed by the offset if applicable
• the object's code and data sizes
• the memory object's flags, which can include:
  • ANON — MAP_PRIVATE, MAP_ANON
  • E — MAP_ELF
  • F — MAP_FIXED
  • P — MAP_PRIVATE
  • S — MAP_SHARED

  For more information about these flags, see mmap() in the QNX Neutrino Library Reference.

---

The mapinfo shorthand was added in QNX Neutrino 6.4.0.

---

memory

Show the memory used by the displayed processes; pidin displays the shared memory regions, including shared objects, and stack usage for each thread. Shared code and data regions are removed from the size of the process.

The stack numbers represent the amount of stack currently mapped and, in brackets, the maximum allowed for that process.

A * next to a stack size indicates that memory used in the stack isn't automatically returned to the system heap when the thread exits. The memory is returned when the process exits.

Entries for /dev/mem indicate shared memory that's mapped into the process address space. For example:

/dev/mem           @38100000 (       0)        172K
  

If the entries for different processes show the same object (@38100000 in this example), they all reference the same shared memory object. The processes can map that shared memory differently; the number in parentheses is the offset that was used in the mmap() call, and the last number is the size of the mapping.

net

Display system information about all the nodes on the Qnet network.

pmem

Display process memory only.

rc

Show the process name and arguments of all remote nodes connected to your machine.

regs

Show the values of the registers.

rmasks

Display runmasks and inherit masks.

---

The rmasks shorthand was added in the QNX Neutrino Core OS 6.3.2.

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sched

Display useful scheduling parameters for each thread. This shorthand is a synonym for -f abNplHJ.

---

The sched shorthand was added in the QNX Neutrino Core OS 6.3.2.

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session

Sort by session ID, then process ID. By default, pidin sorts the output by process ID.

signals

Show the signal state of the displayed processes.

syspage

Show the syspage entry. You can specify which section to print by indicating a name (e.g. the command pidin syspage=asinfo displays the asinfo section). The default is all. For more information, see “Structure of the system page” in the Customizing Image Startup Programs chapter of Building Embedded Systems.

threads

Show the thread name; if a thread doesn't have a name, pidin displays the thread's ID (tid) instead.

timers

Show the timers owned by the process. For each timer it shows:

• id — the timer ID returned by TimerCreate().
• tid — the thread ID associated with this timer (0 for the entire process).
• overruns — the number of overruns.
• clock_type — the type of clock used. Valid descriptions include:
  • REAL — CLOCK_REALTIME
  • SOFT — CLOCK_SOFTTIME
  • MONO — CLOCK_MONOTONIC
• flags — the timer flag. Valid flags include:
  • X — _NTO_TI_EXPIRED
  • A — _NTO_TI_ABSOLUTE
  • a — _NTO_TI_ACTIVE
• msec — the time left before expiry, in milliseconds.
• interval_msec — the timer interval, in milliseconds.
• event — the description of the sigevent to be delivered on timer expiry. Valid event descriptions are listed for the irq shorthand.

times

For each process displayed, show:

• start time — the time and date that the process was started
• utime — the number of CPU seconds consumed by the process
• stime — the number of CPU seconds consumed by the kernel on behalf of the process
• cutime — the number of CPU seconds consumed by the children of the process
• cstime — the number of CPU seconds consumed by the kernel on behalf of the children of the process

The times for the child processes are added to cutime and cstime only after the children terminate.

---

CPU usage is calculated by sampling. When the timer interrupt occurs, the kernel determines which process is running, and adds the time to the total running times of the active thread and its process. If the kernel itself is active, it also adds the time to the system times (stime) of the active thread and its process. The utime is the total running time minus the system time. As a result, these times are approximate, and can be inaccurate (e.g. if a process is driven by the timer interrupt). To determine more accurate times, use the system profiler. For more information, see the System Analysis Toolkit User's Guide, or the Analyzing Your System with Kernel Tracing chapter of the IDE User's Guide.

---

ttimes

Show thread times.

users

Display the real, effective, and saved user IDs and group IDs for the user who launched the processes. This option doesn't display the user name or group name, just the numerical IDs.

Description:

The pidin utility displays statistics about the processes running on a QNX Neutrino system.

By default, pidin displays the statistics once and then exits. If you specify the -l, pidin loops forever, displaying statistics after the delay specified by the -d option.

If you specify the -l and -k options, pidin loops until a error occurs, displaying statistics after the given delay. The most common error encountered is a race condition: procnto indicates that a process exists, but the process is gone when pidin queries it.

If you want to find out how much space the image file system (IFS) occupies in the memory, run the following command:

pidin syspage=asinfo

and look for the lines with imagefs. See the output in the display as shown in the example below.

Values in the Blocked column

If you specify the %B format, the output includes a Blocked column whose value depends on the thread's state:

Examples:

The pidin command prints a listing similar to this:

     pid tid name               prio STATE       Blocked
       1   1 /sys/procnto-instr   0f READY
       1   3 /sys/procnto-instr  10r RUNNING
       1   4 /sys/procnto-instr  12r RECEIVE     1
       1   5 /sys/procnto-instr  12r RECEIVE     1
       1   6 /sys/procnto-instr  12r RECEIVE     1
       1  11 /sys/procnto-instr  12r RECEIVE     1
       1  12 /sys/procnto-instr  10r RECEIVE     1
       1  13 /sys/procnto-instr  10r RECEIVE     1
       1  15 /sys/procnto-instr 255r RECEIVE     1
       1  16 /sys/procnto-instr  10r RECEIVE     1
       1  17 /sys/procnto-instr  10r RECEIVE     1
       2   1 sbin/tinit          10o REPLY       1
       3   1 proc/boot/slogger   10o RECEIVE     1
       5   1 proc/boot/pci-bios  10o RECEIVE     1
       6   1 roc/boot/devb-eide  10o SIGWAITINFO
       6   2 roc/boot/devb-eide  21r RECEIVE     1
       …

Using pidin -F "%I %60N" displays the PID and TID, along with up to 60 characters of the processes' short name:

pid-tid     name
       1-01 rldbuild/cdr/qnx6/tmp/target/qnx6/x86/boot/sys/procnto-instr
       1-03 rldbuild/cdr/qnx6/tmp/target/qnx6/x86/boot/sys/procnto-instr
       1-04 rldbuild/cdr/qnx6/tmp/target/qnx6/x86/boot/sys/procnto-instr
       1-05 rldbuild/cdr/qnx6/tmp/target/qnx6/x86/boot/sys/procnto-instr
       1-06 rldbuild/cdr/qnx6/tmp/target/qnx6/x86/boot/sys/procnto-instr
       1-11 rldbuild/cdr/qnx6/tmp/target/qnx6/x86/boot/sys/procnto-instr
       1-12 rldbuild/cdr/qnx6/tmp/target/qnx6/x86/boot/sys/procnto-instr
       1-13 rldbuild/cdr/qnx6/tmp/target/qnx6/x86/boot/sys/procnto-instr
       1-15 rldbuild/cdr/qnx6/tmp/target/qnx6/x86/boot/sys/procnto-instr
       1-16 rldbuild/cdr/qnx6/tmp/target/qnx6/x86/boot/sys/procnto-instr
       1-17 rldbuild/cdr/qnx6/tmp/target/qnx6/x86/boot/sys/procnto-instr
       2-01 sbin/tinit
       3-01 proc/boot/slogger
       5-01 proc/boot/pci-bios
       6-01 proc/boot/devb-eide
       …

The pidin mem command displays:

     pid tid name               prio STATE           code  data         stack
       1   1 /sys/procnto-instr   0f READY           1812K   12K      0(320)*
       1   3 /sys/procnto-instr  10r RUNNING         1812K   12K     0(8192)
       1   4 /sys/procnto-instr  12r RECEIVE         1812K   12K     0(8192)
       1   5 /sys/procnto-instr  12r RECEIVE         1812K   12K     0(8192)
       1   6 /sys/procnto-instr  12r RECEIVE         1812K   12K     0(8192)
       1  11 /sys/procnto-instr  12r RECEIVE         1812K   12K     0(8192)
       1  12 /sys/procnto-instr  10r RECEIVE         1812K   12K     0(8192)
       1  13 /sys/procnto-instr  10r RECEIVE         1812K   12K     0(8192)
       1  15 /sys/procnto-instr 255r RECEIVE         1812K   12K     0(8192)
       1  16 /sys/procnto-instr  10r RECEIVE         1812K   12K     0(8192)
       1  17 /sys/procnto-instr  10r RECEIVE         1812K   12K     0(8192)
            procnto-instr      @cfbe5000              12K   12K
       2   1 sbin/tinit          10o REPLY            8192   36K  4096(516K)*
            ldqnx.so.2         @b0300000             344K   16K
       3   1 proc/boot/slogger   10o RECEIVE          8192  104K  4096(516K)*
            ldqnx.so.2         @b0300000             344K   16K
       5   1 proc/boot/pci-bios  10o RECEIVE           36K   40K  8192(516K)*
            ldqnx.so.2         @b0300000             344K   16K
       6   1 roc/boot/devb-eide  10o SIGWAITINFO       52K   91M  8192(516K)*
       6   2 roc/boot/devb-eide  21r RECEIVE           52K   91M   4096(12K)
       …

The pidin syspage=asinfo command displays:

Section:asinfo offset:0x00000568 size:0x00000240
    0)                0-ffff             o:ffff a:0000 p:100 n:io
   20)                0-ffffffff         o:ffff a:0010 p:100 n:memory
   40)                0-ffffff           o:0020 a:0010 p:100 n:memory/isa
   a0)                0-9fbff            o:0040 a:0017 p:100 n:memory/isa/ram
  180)             1000-cfff             o:00a0 a:0007 p:100 n:memory/isa/ram/sysram
  1a0)            20f98-9fbff            o:00a0 a:0007 p:100 n:memory/isa/ram/sysram
   c0)           100000-ffffff           o:0040 a:0037 p:100 n:memory/isa/ram
  1c0)           100000-40e507           o:00c0 a:0007 p:100 n:memory/isa/ram/sysram
  1e0)           5e533c-ffffff           o:00c0 a:0027 p:100 n:memory/isa/ram/sysram
   60)          6000000-ffefffff         o:0020 a:0013 p:100 n:memory/device
  100)          6000000-ffeafff          o:0060 a:0017 p:100 n:memory/device/ram
  220)          6000000-ffeafff          o:0100 a:0007 p:100 n:memory/device/ram/sysram
   80)         fff00000-ffffffff         o:0020 a:0005 p:100 n:memory/rom
   e0)          1000000-5ffffff          o:0020 a:0037 p:100 n:memory/ram
  200)          1000000-5ffffff          o:00e0 a:0027 p:100 n:memory/ram/sysram
  120)           40e508-5e533b           o:0020 a:0005 p:100 n:memory/imagefs
  140)           400400-40e507           o:0020 a:0007 p:100 n:memory/startup
  160)           40e508-5e533b           o:0020 a:0007 p:100 n:memory/bootram

See also:

hogs, showmem, top

QNX Neutrino Microkernel chapter of the System Architecture guide

Fine-Tuning Your System in the Neutrino User's Guide