Sophie: systemtap-1:1.3-1.1.mga1 i586

systemtap-1.3-1.1.mga1.i586.rpm

SYSTEMTAP EXAMPLES INDEX BY KEYWORD
(see also index.txt)

= ALLOCATOR =

memory/vm.tracepoints.stp - Collect slab allocation statistics
keywords: memory slab allocator

The script will probe all memory slab/slub allocations and collects
information about the size of the object (bytes requested) and
user-space process in execution. When run over a period of time, it
helps to correlate kernel-space memory consumption owing to
user-space processes.

= AUTOFS =

network/autofs4.stp - Watch autofs4 operations
keywords: network autofs nfs

Trace key autofs4 operations such as mounting or unmounting remote
filesystems.

= BACKTRACE =

interrupt/scf.stp - Tally Backtraces for Inter-Processor Interrupt (IPI)
keywords: interrupt backtrace

The Linux kernel function smp_call_function causes expensive
inter-processor interrupts (IPIs). The scf.stp script tallies the
processes and backtraces causing the interprocessor interrupts to
identify the cause of the expensive IPI. On exit the script prints
the tallies in descending frequency.

io/io_submit.stp - Tally Reschedule Reason During AIO io_submit Call
keywords: io backtrace

When a reschedule occurs during an AIO io_submit call, accumulate the
traceback in a histogram. When the script exits prints out a sorted
list from most common to least common backtrace.

process/dumpstack.stp - Print the kernel stack of a hung task
keywords: process backtrace

The script prints the kernel stack of any non-running pid in the
system. This is useful for diagnosing the reason that a task is
hung.

process/sleepingBeauties.stp - Generating Backtraces of Threads Waiting for IO Operations
keywords: io scheduler backtrace

The script monitors the time that threads spend in waiting for IO
operations (in "D" state) in the wait_for_completion function. If a
thread spends over 10ms, its name and backtrace is printed, and later
so is the total delay.

= BUFFER =

network/dropwatch.stp - Watch Where Socket Buffers are Freed in the Kernel
keywords: network tracepoint buffer free

Every five seconds the dropwatch.stp script lists the number of
socket buffers freed at locations in the kernel.

network/sk_stream_wait_memory.stp - Track Start and Stop of Processes Due to Network Buffer Space
keywords: network tcp buffer memory

The sk_stream-wait_memory.stp prints a time stamp, executable, and
pid each time a process blocks due to the send buffer being full. A
similar entry is printed each time a process continues because there
is room in the buffer.

= CALLGRAPH =

general/para-callgraph-verbose.stp - Callgraph tracing with verbose arguments
keywords: trace callgraph

Print a timed per-thread callgraph, complete with pretty-printed
function parameters and return values. The first parameter names the
function probe points to trace. The optional second parameter names
the probe points for trigger functions, which acts to enable tracing
for only those functions that occur while the current thread is
nested within the trigger.

general/para-callgraph.stp - Callgraph tracing with arguments
keywords: trace callgraph

Print a timed per-thread callgraph, complete with function parameters
and return values. The first parameter names the function probe
points to trace. The optional second parameter names the probe
points for trigger functions, which acts to enable tracing for only
those functions that occur while the current thread is nested within
the trigger.

= CPU =

general/graphs.stp - Graphing Disk and CPU Utilization
keywords: disk cpu use graph

The script tracks the disk and CPU utilization. The resulting output
of the script can be piped into gnuplot to generate a graph of disk
and CPU USE.

= DEVICE =

network/netdev.stp - Trace Activity on Network Devices
keywords: network device traffic

The netdev.stp script traces configuration and transmit/receive
activity on network devices.

= DISK =

general/graphs.stp - Graphing Disk and CPU Utilization
keywords: disk cpu use graph

The script tracks the disk and CPU utilization. The resulting output
of the script can be piped into gnuplot to generate a graph of disk
and CPU USE.

io/deviceseeks.stp - Histograms of Seek Behavior for Each Device
keywords: disk

The deviceseeks.stp script generates a histogram showing the
frequency of different sized seeks on each device.

io/disktop.stp - Summarize Disk Read/Write Traffic
keywords: disk

Get the status of reading/writing disk every 5 seconds, output top
ten entries during that period.

= FILES =

process/pfiles.stp - print process file descriptors
keywords: process files

Run pfiles.stp to produce a human-readable summary of all open file
descriptors of a given process. Specify the process-id as -x PID for
fastest performance.

= FILESYSTEM =

general/badname.stp - Bad Filename Filter
keywords: filesystem hack

The badname.stp script shows how one could prevent the creation of
files with undesirable names using guru mode.

= FORMAT =

general/ansi_colors.stp - Color Table for ansi_set_color2() and ansi_set_color3()
keywords: format

The script prints a table showing the available color combinations
for the ansi_set_color2() and ans_set_color3() functions in the
ansi.stp tapset.

general/ansi_colors2.stp - Show Attribues in Table for ansi_set_color3()
keywords: format

The script prints a table showing the available attributes (bold,
underline, and inverse) with color combinations for the
ans_set_color3() function in the ansi.stp tapset.

= FREE =

network/dropwatch.stp - Watch Where Socket Buffers are Freed in the Kernel
keywords: network tracepoint buffer free

Every five seconds the dropwatch.stp script lists the number of
socket buffers freed at locations in the kernel.

= FUNCTIONS =

profiling/functioncallcount.stp - Count Times Functions Called
keywords: profiling functions

The functioncallcount.stp script takes one argument, a list of
functions to probe. The script will run and count the number of times
that each of the functions on the list is called. On exit the script
will print a sorted list from most frequently to least frequently
called function.

profiling/sched_switch.stp - Display the task switches happening in the scheduler
keywords: profiling functions

The sched_switch.stp script takes two arguments, first argument can
be "pid" or "name" to indicate what is being passed as second
argument. The script will trace the process based on pid/name and
print the scheduler switches happening with the process. If no
arguments are passed, it displays all the scheduler switches. This
can be used to understand which tasks schedule out the current
process being traced, and when it gets scheduled in again.

= FUTEX =

process/futexes.stp - System-Wide Futex Contention
keywords: syscall locking futex

The script watches the futex syscall on the system. On exit the
futexes address, the number of contentions, and the average time for
each contention on the futex are printed from lowest pid number to
highest.

= GRAPH =

general/graphs.stp - Graphing Disk and CPU Utilization
keywords: disk cpu use graph

The script tracks the disk and CPU utilization. The resulting output
of the script can be piped into gnuplot to generate a graph of disk
and CPU USE.

= HACK =

general/badname.stp - Bad Filename Filter
keywords: filesystem hack

The badname.stp script shows how one could prevent the creation of
files with undesirable names using guru mode.

= INTERRUPT =

interrupt/interrupts-by-dev.stp - Record interrupts on a per-device basis.
keywords: interrupt

The interrupts-by-dev.stp script profiles interrupts received by each
device per 100 ms.

interrupt/scf.stp - Tally Backtraces for Inter-Processor Interrupt (IPI)
keywords: interrupt backtrace

process/cycle_thief.stp - Track IRQs and Other Processes Stealing Cycles from a Task
keywords: process scheduler time tracepoint interrupt

The cycle_thief.stp script instruments the scheduler and IRQ handler
to determine which processes and interrupts are competing with the
specified task for the cpu cycles. This script uses the '-c' or '-x'
options to focus on a specific task. The script output the number of
times the task migrates between processors, histograms showing the
length of time on and off processor, lists of processes running while
the task is off the processor, and the interrupts that occurred while
the task was running.

= IO =

io/io_submit.stp - Tally Reschedule Reason During AIO io_submit Call
keywords: io backtrace

When a reschedule occurs during an AIO io_submit call, accumulate the
traceback in a histogram. When the script exits prints out a sorted
list from most common to least common backtrace.

io/ioblktime.stp - Average Time Block IO Requests Spend in Queue
keywords: io

The ioblktime.stp script tracks the amount of time that each block IO
requests spend waiting for completion. The script computes the
average waiting time for block IO per device and prints list every 10
seconds. In some cases there can be too many outstanding block IO
operations and the script may exceed the default number of
MAXMAPENTRIES allowed. In this case the allowed number can be
increased with "-DMAXMAPENTRIES=10000" option on the stap command
line.

io/iodevstats.stp - List Executables Reading and Writing the Most Data by Device
keywords: io profiling

The iodevstats.stp script measures the amount of data successfully
read and written by all the executables for each io device on the
system. The output is sorted from greatest sum of bytes read and
written to a device by an executable to the least. The output
contains device major/minor number, the count of operations (reads
and writes), the totals and averages for the number of bytes read and
written.

io/iostat-scsi.stp - iostat for SCSI Devices
keywords: io profiling scsi

The iostat-scsi.stp script provides a breakdown of the number of blks
read and written on the machine's various SCSI devices. The script
takes one argument which is the number of seconds between reports.

io/iostats.stp - List Executables Reading and Writing the Most Data
keywords: io profiling

The iostat.stp script measures the amount of data successfully read
and written by all the executables on the system. The output is
sorted from most greatest sum of bytes read and written by an
executable to the least. The output contains the count of operations
(opens, reads, and writes), the totals and averages for the number of
bytes read and written.

io/iotime.stp - Trace Time Spent in Read and Write for Files
keywords: syscall read write time io

The script watches each open, close, read, and write syscalls on the
system. For each file the scripts observes opened it accumulates the
amount of wall clock time spent in read and write operations and the
number of bytes read and written. When a file is closed the script
prints out a pair of lines for the file. Both lines begin with a
timestamp in microseconds, the PID number, and the executable name in
parentheses. The first line with the "access" keyword lists the file
name, the attempted number of bytes for the read and write
operations. The second line with the "iotime" keyword list the file
name and the number of microseconds accumulated in the read and write
syscalls.

io/iotop.stp - Periodically Print I/O Activity by Process Name
keywords: io

Every five seconds print out the top ten executables generating I/O
traffic during that interval sorted in descending order.

io/mbrwatch.stp - Monitor read/write of MBR (boot sector) area of block devices
keywords: io monitoring

The mbrwatch.stp script reports any attempted reads/writes of the
first few sectors of a raw block device.

io/nfs_func_users.stp - Tally the Number of NFS Functions Used by Each Process
keywords: io profiling

The nfs_func_users.stp script counts the uses of NFS functions in the
kernel on a per process bases. The output is sorted from the process
with the greatest number of NFS functions called to the least. The
output contains the executable name, the process number, and the
total number of NFS functions called by the process.

io/traceio.stp - Track Cumulative I/O Activity by Process Name
keywords: io

Every second print out the top ten executables sorted in descending
order based on cumulative I/O traffic observed.

io/traceio2.stp - Watch I/O Activity on a Particular Device
keywords: io

Print out the executable name and process number as reads and writes
to the specified device occur.

io/ttyspy.stp - Monitor tty typing.
keywords: io tty per-process monitoring

The ttyspy.stp script uses tty_audit hooks to monitor recent typing
activity on the system, printing a scrolling record of recent
keystrokes, on a per-tty basis.

process/sleepingBeauties.stp - Generating Backtraces of Threads Waiting for IO Operations
keywords: io scheduler backtrace

= LOCKING =

locks/bkl.stp - Tracing Contention on Big Kernel Lock (BKL)
keywords: locking

The bkl.stp script can help determine whether the Big Kernel Lock
(BKL) is causing serialization on a multiprocessor system due to
excessive contention of the BKL. The bkl.stp script takes one
argument which is the number of processes waiting for the Big Kernel
Lock (BKL). When the number of processes waiting for the BKL is
reached or exceeded, the script will print a time stamp, the number
of processes waiting for the BKL, the holder of the BKL, and the
amount of time the BKL was held.

locks/bkl_stats.stp - Per Process Statistics on Big Kernel Lock (BKL) Use
keywords: locking

The bkl_stats.stp script can indicate which processes have excessive
waits for the Big Kernel Lock (BKL) and which processes are taking
the BKL for long periods of time. The bkl_stats.stp script prints
lists of all the processes that require the BKL. Every five seconds
two tables are printed out. The first table lists the processes that
waited for the BKL followed by the number of times that the process
waited, the minimum time of the wait, the average and the maximum
time waited. The second table lists has similar information for the
time spent in holding the lock for each of the processes.

process/futexes.stp - System-Wide Futex Contention
keywords: syscall locking futex

= MEMORY =

general/sizeof.stp - Print the size of a C type.
keywords: statistics memory simple

This script prints the size of a type, based on dwarf debuginfo for
any kernel or userspace module, or trial-compilation of a given
header file name.

memory/kmalloc-top - Show Paths to Kernel Malloc (kmalloc) Invocations
keywords: memory

The kmalloc-top perl program runs a small systemtap script to collect
stack traces for each call to the kmalloc function and counts the
time that each stack trace is observed. When kmalloc-top exits it
prints out sorted list. The output can be filtered to print only the
first N stack traces (-t), stack traces with a minimum counts (-m),
or exclude certain stack traces (-e).

memory/mmanonpage.stp - Track Virtual Memory System Actions on Anonymous Pages
keywords: memory

The mmanonpage.stp script uses the virtual memory tracepoints
available in some kernels to track the number of faults, user space
frees, page ins, copy on writes and unmaps for anonymous pages. When
the script is terminated the counts are printed for each process that
allocated pages while the script was running. This script displays
the anonymous page statistics for each process that ran while the
script is active. It's useful in debugging leaks in the anonymous
regions of a process.

memory/mmfilepage.stp - Track Virtual Memory System Actions on File Backed Pages
keywords: memory

The mmfilepage.stp script uses the virtual memory tracepoints
available in some kernels to track the number of faults, copy on
writes mapping, and unmapping operations for file backed pages. When
the script is terminated the counts are printed for each process that
allocated pages while the script was running. The mmfilepage.stp
script is useful in debugging leaks in the mapped file regions of a
process.

memory/mmreclaim.stp - Track Virtual Memory System Page Reclamation
keywords: memory

The mmreclaim.stp script uses the virtual memory tracepoints
available in some kernels to track page reclaim activity that
occurred while the script was running. It's useful in debugging
performance problems that occur due to page reclamation.

memory/mmwriteback.stp - Track Virtual Memory System Writing to Disk
keywords: memory

The mmwriteback.stp script uses the virtual memory tracepoints
available in some kernels to report all of the file writebacks that
occur form kupdate, pdflush and kjournald while the script is
running. It's useful in determining where writes are coming from on
a supposedly idle system that is experiencing unexpected IO.

memory/numa_faults.stp - Summarize Process Misses across NUMA Nodes
keywords: memory numa

The numa_faults.stp script tracks the read and write pages faults for
each process. When the script exits it prints out the total read and
write pages faults for each process. The script also provide a break
down of page faults per node for each process. This script is useful
for determining whether the program has good locality (page faults
limited to a single node) on a NUMA computer.

memory/overcommit.stp - Log failed process memory allocation due to overcommit limits
keywords: memory process

The overcommit.stp script prints a line each time the kernel refuses
a memory allocation request from a process because of
/proc/sys/vm/overcommit* limits.

memory/pfaults.stp - Generate Log of Major and Minor Page Faults
keywords: memory

The pfaults.stp script generates a simple log for each major and
minor page fault that occurs on the system. Each line contains a
timestamp (in microseconds) when the page fault servicing was
completed, the pid of the process, the address of the page fault, the
type of access (read or write), the type of fault (major or minor),
and the elapsed time for page fault. This log can be examined to
determine where the page faults are occurring.

memory/vm.tracepoints.stp - Collect slab allocation statistics
keywords: memory slab allocator

network/sk_stream_wait_memory.stp - Track Start and Stop of Processes Due to Network Buffer Space
keywords: network tcp buffer memory

= MONITORING =

general/varwatch.stp - Watch a variable changing value in a thread.
keywords: monitoring

This script places a set of probes (specified by $1), each of which
monitors the state of some context $variable expression (specified by
$2). Whenever the value changes, with respect to the active thread,
the event is traced.

io/mbrwatch.stp - Monitor read/write of MBR (boot sector) area of block devices
keywords: io monitoring

The mbrwatch.stp script reports any attempted reads/writes of the
first few sectors of a raw block device.

io/ttyspy.stp - Monitor tty typing.
keywords: io tty per-process monitoring

The ttyspy.stp script uses tty_audit hooks to monitor recent typing
activity on the system, printing a scrolling record of recent
keystrokes, on a per-tty basis.

= NETWORK =

network/autofs4.stp - Watch autofs4 operations
keywords: network autofs nfs

Trace key autofs4 operations such as mounting or unmounting remote
filesystems.

network/dropwatch.stp - Watch Where Socket Buffers are Freed in the Kernel
keywords: network tracepoint buffer free

Every five seconds the dropwatch.stp script lists the number of
socket buffers freed at locations in the kernel.

network/netdev.stp - Trace Activity on Network Devices
keywords: network device traffic

The netdev.stp script traces configuration and transmit/receive
activity on network devices.

network/nettop.stp - Periodic Listing of Processes Using Network Interfaces
keywords: network traffic per-process

Every five seconds the nettop.stp script prints out a list of
processed (PID and command) with the number of packets sent/received
and the amount of data sent/received by the process during that
interval.

network/sk_stream_wait_memory.stp - Track Start and Stop of Processes Due to Network Buffer Space
keywords: network tcp buffer memory

network/socket-trace.stp - Trace Functions called in Network Socket Code
keywords: network socket

The script instruments each of the functions in the Linux kernel's
net/socket.c file. The script prints out trace data. The first
element of a line is time delta in microseconds from the previous
entry. This is followed by the command name and the PID. The "->" and
"<-" indicates function entry and function exit, respectively. The
last element of the line is the function name.

network/socktop - Periodically Summarize Socket Activity on the System
keywords: network socket

The socktop script periodically prints out a list of the processes
with the highest socket activity. Command line options for the
script allow filtering to focus on particular types of sockets. The
"-h" option lists socktop script's filtering options.

network/tcp_connections.stp - Track Creation of Incoming TCP Connections
keywords: network tcp socket

The tcp_connections.stp script prints information for each new
incoming TCP connection accepted by the computer. The information
includes the UID, the command accepting the connection, the PID of
the command, the port the connection is on, and the IP address of the
originator of the request.

network/tcp_trace.stp - Tcp connection tracing utility.
keywords: network trace

This scripts traces a given tcp connection based on the filter
parameters given by the user. The indexing is done by the 4 tuples
local address, remote address, local port, remote port.

network/tcpdumplike.stp - Dump of Received TCP Packets
keywords: network traffic

The tcpdumplike.stp prints out a line for each TCP packet received.
Each line includes the source and destination IP addresses, the
source and destination ports, and flags.

network/tcpipstat.stp - Display network statistics for individual TCP sockets.
keywords: network statistics

tcpipstat collects and displays network statistics related to
individual TCP sockets or groups of sockets. The statistics that are
collected are simular to that of the command netstat -s, only sorted
and grouped by individual sockets.

= NFS =

network/autofs4.stp - Watch autofs4 operations
keywords: network autofs nfs

Trace key autofs4 operations such as mounting or unmounting remote
filesystems.

= NUMA =

memory/numa_faults.stp - Summarize Process Misses across NUMA Nodes
keywords: memory numa

= PER-PROCESS =

io/ttyspy.stp - Monitor tty typing.
keywords: io tty per-process monitoring

The ttyspy.stp script uses tty_audit hooks to monitor recent typing
activity on the system, printing a scrolling record of recent
keystrokes, on a per-tty basis.

network/nettop.stp - Periodic Listing of Processes Using Network Interfaces
keywords: network traffic per-process

= PROCESS =

memory/overcommit.stp - Log failed process memory allocation due to overcommit limits
keywords: memory process

The overcommit.stp script prints a line each time the kernel refuses
a memory allocation request from a process because of
/proc/sys/vm/overcommit* limits.

process/cycle_thief.stp - Track IRQs and Other Processes Stealing Cycles from a Task
keywords: process scheduler time tracepoint interrupt

process/dumpstack.stp - Print the kernel stack of a hung task
keywords: process backtrace

The script prints the kernel stack of any non-running pid in the
system. This is useful for diagnosing the reason that a task is
hung.

process/errsnoop.stp - tabulate system call errors
keywords: process syscall

The script prints a periodic tabular report about failing system
calls, by process and by syscall failure. The first optional
argument specifies the reporting interval (in seconds, default 5);
the second optional argument gives a screen height (number of lines
in the report, default 20).

process/forktracker.stp - Trace Creation of Processes
keywords: process scheduler

The forktracker.stp script prints out a time-stamped entry showing
each fork and exec operation on the machine. This can be useful to
determine what process is creating a flurry of short-lived processes.

process/noptrace.stp - disable ptrace(2) from hierarchies of processes
keywords: process security

noptrace.stp blocks ptrace(2) attempts from processes identified by
stap -c/-x, as also specifiable from /proc/systemtap/stap_XXX/
control files. Processes may be added or removed from the blocked
list.

process/pfiles.stp - print process file descriptors
keywords: process files

Run pfiles.stp to produce a human-readable summary of all open file
descriptors of a given process. Specify the process-id as -x PID for
fastest performance.

process/plimit.stp - print resource limits
keywords: process

The script prints a variety of resource limits for a given pid, like
/proc/$$/limits on recent kernels.

process/schedtimes.stp - Track Time Processes Spend in Various States using Tracepoints
keywords: process scheduler time tracepoint

The schedtimes.stp script instruments the scheduler to track the
amount of time that each process spends in running, sleeping,
queuing, and waiting for io. On exit the script prints out the
accumulated time for each state of processes observed. Optionally,
this script can be used with the '-c' or '-x' options to focus on a
specific PID.

= PROFILING =

io/iodevstats.stp - List Executables Reading and Writing the Most Data by Device
keywords: io profiling

io/iostat-scsi.stp - iostat for SCSI Devices
keywords: io profiling scsi

io/iostats.stp - List Executables Reading and Writing the Most Data
keywords: io profiling

io/nfs_func_users.stp - Tally the Number of NFS Functions Used by Each Process
keywords: io profiling

process/pf2.stp - Profile kernel functions
keywords: profiling

The pf2.stp script sets up time-based sampling. Every five seconds it
prints out a sorted list with the top ten kernel functions with
samples.

profiling/errno.stp - Show Which Processes and System Calls Return Errors Most Frequently
keywords: profiling

On exit the errno.stp script provides a sorted list showing which
combination of PID, system call, and error occur most frequently.

profiling/fntimes.stp - Show functions taking longer than usual
keywords: profiling

The fntimes.stp script monitors the execution time history of a given
function family (assumed non-recursive). Each time (beyond a warmup
interval) is then compared to the historical maximum. If it exceeds
a certain threshold (250%), a message is printed.

profiling/functioncallcount.stp - Count Times Functions Called
keywords: profiling functions

profiling/linetimes.stp - Show Time Spent on Each Line if a Function
keywords: profiling

The linetimes.stp script takes two arguments: where to find the
function and the function name. linetimes.stp will instrument each
line in the function. It will print out the number of times that the
function is called, a table with the average and maximum time each
line takes, and control flow information when the script exits.

profiling/sched_switch.stp - Display the task switches happening in the scheduler
keywords: profiling functions

profiling/thread-times.stp - Profile kernel functions
keywords: profiling

The thread-times.stp script sets up time-based sampling. Every five
seconds it prints out a sorted list with the top twenty threads
occupying the CPUs, broken down as a percentage of user and kernel
time.

profiling/timeout.stp - Show Processes Doing Polling Operations
keywords: profiling

The timeout.stp script is based on a blog entry
(http://udrepper.livejournal.com/19041.html) mentioning a need for a
tool to help developers find applications that are polling. The
timeout.stp script monitors systemcall used for polling and records
the systemcalls that timed out rather than returned because some
action occurred. The script updates the screen once a second with the
top twenty processes.

profiling/topsys.stp - Show Processes Doing Polling Operations
keywords: profiling

The topsys.stp script lists out the top twenty systemcalls for the
previous 5 seconds. The output is sorted from most frequent to least
frequent.

= READ =

io/iotime.stp - Trace Time Spent in Read and Write for Files
keywords: syscall read write time io

= SCHEDULER =

process/chng_cpu.stp - Monitor Changes in Processor Executing a Task
keywords: scheduler

The chng_cpu.stp script takes an argument which is the executable
name of the task it should monitor. Each time a task with that
executable name is found running on a different processor, the script
prints out the thread id (tid), the executable name, the processor
now running the task, the thread state, and a backtrace showing the
kernel functions that triggered the running of the task on the
processor.

process/cycle_thief.stp - Track IRQs and Other Processes Stealing Cycles from a Task
keywords: process scheduler time tracepoint interrupt

process/forktracker.stp - Trace Creation of Processes
keywords: process scheduler

process/migrate.stp - Track the Migration of Specific Executables
keywords: scheduler

The migrate.stp script takes an argument which is the executable name
of the task it should monitor. Each time a task with that executable
name migrates between processors an entry is printed with the process
id (pid), the executable name, the processor off loading the task,
and the process taking the task. Note that the task may or may not be
executing at the time of the migration.

process/schedtimes.stp - Track Time Processes Spend in Various States using Tracepoints
keywords: process scheduler time tracepoint

process/sleepingBeauties.stp - Generating Backtraces of Threads Waiting for IO Operations
keywords: io scheduler backtrace

= SCSI =

io/iostat-scsi.stp - iostat for SCSI Devices
keywords: io profiling scsi

= SECURITY =

process/noptrace.stp - disable ptrace(2) from hierarchies of processes
keywords: process security

= SIGNALS =

process/sig_by_pid.stp - Signal Counts by Process ID
keywords: signals

Print signal counts by process ID in descending order.

process/sig_by_proc.stp - Signal Counts by Process Name
keywords: signals

Print signal counts by process name in descending order.

process/sigkill.stp - Track SIGKILL Signals
keywords: signals

The script traces any SIGKILL signals. When that SIGKILL signal is
sent to a process, the script prints out the signal name, the
destination executable and process ID, the executable name and user
ID that sents the signal.

process/sigmon.stp - Track a particular signal to a specific process
keywords: signals

The script watches for a particular signal sent to a specific
process. When that signal is sent to the specified process, the
script prints out the PID and executable of the process sending the
signal, the PID and executable name of the process receiving the
signal, and the signal number and name.

= SIMPLE =

general/helloworld.stp - SystemTap "Hello World" Program
keywords: simple

A basic "Hello World" program implemented in SystemTap script. It
prints out "hello world" message and then immediately exits.

general/sizeof.stp - Print the size of a C type.
keywords: statistics memory simple

This script prints the size of a type, based on dwarf debuginfo for
any kernel or userspace module, or trial-compilation of a given
header file name.

= SLAB =

memory/vm.tracepoints.stp - Collect slab allocation statistics
keywords: memory slab allocator

= SLEEP =

process/sleeptime.stp - Trace Time Spent in nanosleep Syscalls
keywords: syscall sleep

The script watches each nanosleep syscall on the system. At the end
of each nanosleep syscall the script prints out a line with a
timestamp in microseconds, the pid, the executable name in
parentheses, the "nanosleep:" key, and the duration of the sleep in
microseconds.

= SOCKET =

network/socket-trace.stp - Trace Functions called in Network Socket Code
keywords: network socket

network/socktop - Periodically Summarize Socket Activity on the System
keywords: network socket

network/tcp_connections.stp - Track Creation of Incoming TCP Connections
keywords: network tcp socket

= STATISTICS =

general/sizeof.stp - Print the size of a C type.
keywords: statistics memory simple

This script prints the size of a type, based on dwarf debuginfo for
any kernel or userspace module, or trial-compilation of a given
header file name.

network/tcpipstat.stp - Display network statistics for individual TCP sockets.
keywords: network statistics

= SYSCALL =

io/iotime.stp - Trace Time Spent in Read and Write for Files
keywords: syscall read write time io

process/errsnoop.stp - tabulate system call errors
keywords: process syscall

process/futexes.stp - System-Wide Futex Contention
keywords: syscall locking futex

process/sleeptime.stp - Trace Time Spent in nanosleep Syscalls
keywords: syscall sleep

process/syscalls_by_pid.stp - System-Wide Count of Syscalls by PID
keywords: syscall

The script watches all syscall on the system. On exit the script
prints a list showing the number of systemcalls executed by each PID
ordered from greatest to least number of syscalls.

process/syscalls_by_proc.stp - System-Wide Count of Syscalls by Executable
keywords: syscall

The script watches all syscall on the system. On exit the script
prints a list showing the number of systemcalls executed by each
executable ordered from greatest to least number of syscalls.

process/wait4time.stp - Trace Time Spent in wait4 Syscalls
keywords: syscall wait4

The script watches each wait4 syscall on the system. At the end of
each wait4 syscall the script prints out a line with a timestamp in
microseconds, the pid, the executable name in parentheses, the
"wait4:" key, the duration of the wait and the PID that the wait4 was
waiting for. If the waited for PID is not specified , it is "-1".

= TCP =

network/sk_stream_wait_memory.stp - Track Start and Stop of Processes Due to Network Buffer Space
keywords: network tcp buffer memory

network/tcp_connections.stp - Track Creation of Incoming TCP Connections
keywords: network tcp socket

= TIME =

io/iotime.stp - Trace Time Spent in Read and Write for Files
keywords: syscall read write time io

process/cycle_thief.stp - Track IRQs and Other Processes Stealing Cycles from a Task
keywords: process scheduler time tracepoint interrupt

process/schedtimes.stp - Track Time Processes Spend in Various States using Tracepoints
keywords: process scheduler time tracepoint

= TRACE =

general/para-callgraph-verbose.stp - Callgraph tracing with verbose arguments
keywords: trace callgraph

general/para-callgraph.stp - Callgraph tracing with arguments
keywords: trace callgraph

network/tcp_trace.stp - Tcp connection tracing utility.
keywords: network trace

This scripts traces a given tcp connection based on the filter
parameters given by the user. The indexing is done by the 4 tuples
local address, remote address, local port, remote port.

= TRACEPOINT =

network/dropwatch.stp - Watch Where Socket Buffers are Freed in the Kernel
keywords: network tracepoint buffer free

Every five seconds the dropwatch.stp script lists the number of
socket buffers freed at locations in the kernel.

process/cycle_thief.stp - Track IRQs and Other Processes Stealing Cycles from a Task
keywords: process scheduler time tracepoint interrupt

process/schedtimes.stp - Track Time Processes Spend in Various States using Tracepoints
keywords: process scheduler time tracepoint

= TRAFFIC =

network/netdev.stp - Trace Activity on Network Devices
keywords: network device traffic

The netdev.stp script traces configuration and transmit/receive
activity on network devices.

network/nettop.stp - Periodic Listing of Processes Using Network Interfaces
keywords: network traffic per-process

network/tcpdumplike.stp - Dump of Received TCP Packets
keywords: network traffic

The tcpdumplike.stp prints out a line for each TCP packet received.
Each line includes the source and destination IP addresses, the
source and destination ports, and flags.

= TTY =

io/ttyspy.stp - Monitor tty typing.
keywords: io tty per-process monitoring

The ttyspy.stp script uses tty_audit hooks to monitor recent typing
activity on the system, printing a scrolling record of recent
keystrokes, on a per-tty basis.

= USE =

general/graphs.stp - Graphing Disk and CPU Utilization
keywords: disk cpu use graph

The script tracks the disk and CPU utilization. The resulting output
of the script can be piped into gnuplot to generate a graph of disk
and CPU USE.

= WAIT4 =

process/wait4time.stp - Trace Time Spent in wait4 Syscalls
keywords: syscall wait4

= WRITE =

io/iotime.stp - Trace Time Spent in Read and Write for Files
keywords: syscall read write time io