stress-ng 0.09.25-1 / usr / share / stress-ng / example-jobs / scheduler.job

#
# scheduler class stressors:
#   various options have been commented out, one can remove the
#   proceeding comment to enable these options if required.

#
# run the following tests in parallel or sequentially
#
run sequential
# run parallel

#
# aggressive:
#   enables more file, cache and memory aggressive options. This may
#   slow tests down, increase latencies and  reduce  the  number  of
#   bogo  ops as well as changing the balance of user time vs system
#   time used depending on the type of stressor being used.
#
# aggressive

#
# ignite-cpu:
#   alter kernel controls to try and maximize the CPU. This requires
#   root  privilege  to alter various /sys interface controls.  Cur‐
#   rently this only works for Intel P-State enabled x86 systems  on
#   Linux.
#
# ignite-cpu

#
# keep-name:
#   by  default,  stress-ng  will  attempt to change the name of the
#   stress processes according to their functionality;  this  option
#   disables  this and keeps the process names to be the name of the
#   parent process, that is, stress-ng.
#
# keep-name

#
# metrics-brief:
#   enable metrics and only output metrics that are non-zero.
#
metrics-brief

#
# verbose
#   show all debug, warnings and normal information output.
#
verbose

#
# run each of the tests for 60 seconds
#  stop stress test after N seconds. One can also specify the units
#  of time in seconds, minutes, hours, days or years with the  suf‐
#  fix s, m, h, d or y.
#
timeout 60s

#
# per stressor options start here
#

#
# affinity stressor options:
#   start  N  workers  that  rapidly  change  CPU  affinity (only on
#   Linux). Rapidly switching CPU affinity can  contribute  to  poor
#   cache behaviour.
#
affinity 0		# 0 means 1 stressor per CPU
# affinity-ops 1000000	# stop after 1000000 bogo ops
affinity-rand		# switch affinity randomly

#
# clone stressor options:
#   start N workers that create  clones  (via  the  clone(2)  system
#   call).  This will rapidly try to create a default of 8192 clones
#   that immediately die and wait in a zombie state until  they  are
#   reaped.   Once the maximum number of clones is reached (or clone
#   fails because one has reached the maximum  allowed)  the  oldest
#   clone  thread  is  reaped  and  a new clone is then created in a
#   first-in first-out manner, and then repeated.   A  random  clone
#   flag  is  selected  for  each clone to try to exercise different
#   clone operarions.  The clone stressor is a Linux only option.
#
clone 0			# 0 means 1 stressor per CPU
# clone-ops 1000000	# stop after 1000000 bogo ops
# clone-max 8192	# create a total of 8192 clones 

#
# daemon stressor options:
#   start  N workers that each create a daemon that dies immediately
#   after creating another daemon and so on. This effectively  works
#   through the process table with short lived processes that do not
#   have a parent and are waited for by init.  This puts pressure on
#   init  to  do  rapid child reaping.  The daemon processes perform
#   the usual mix of calls to turn into  typical  UNIX  daemons,  so
#   this artificially mimics very heavy daemon system stress.
#
daemon 0		# 0 means 1 stressor per CPU
# daemon-ops 1000000	# stop after 1000000 bogo ops

#
# dnotify stressor options:
#   start N workers performing file system activities such  as  mak‐
#   ing/deleting  files/directories,  renaming files, etc. to stress
#   exercise the various dnotify events (Linux only).
#
dnotify 0		# 0 means 1 stressor per CPU
# dnotify-ops 1000000	# stop after 1000000 bogo ops

#
# eventfd stressor options:
#   start  N parent and child worker processes that read and write 8
#   byte event messages  between  them  via  the  eventfd  mechanism
#   (Linux only).
#
eventfd 0		# 0 means 1 stressor per CPU
# eventfd-ops 1000000	# stop after 1000000 bogo ops

#
# exec stressor options:
#   start N workers continually forking children that exec stress-ng
#   and then exit almost immediately.
#
exec 0			# 0 means 1 stressor per CPU
# exec-ops 1000000	# stop after 1000000 bogo ops
# exec-max 1		# maximum number of fork/execs per stressor
			# per iteration

#
# fanotify stressor options:
#   start N workers performing file system activities such as creat‐
#   ing, opening, writing, reading and unlinking files  to  exercise
#   the  fanotify  event  monitoring  interface  (Linux only).  Each
#   stressor runs a child process to generate file events and a par‐
#   ent process to read file events using fanotify.
#
fanotify 0		# 0 means 1 stressor per CPU
# fanotify-ops 1000000	# stop after 1000000 bogo ops

#
# fault stressor options:
#   start N workers that generates minor and major page faults.
#
fault 0			# 0 means 1 stressor per CPU
# fault-ops 1000000	# stop after 1000000 bogo ops

#
# fifo stressor options:
#   start  N  workers  that exercise a named pipe by transmitting 64
#   bit integers.
#
fifo 0			# 0 means 1 stressor per CPU
# fifo-ops 1000000	# stop after 1000000 bogo ops
# fifo-readers 8	# create 8 fifo readers per stressor

#
# fork stressor options:
#   start  N  workers  continually forking children that immediately
#   exit.
#
fork 0			# 0 means 1 stressor per CPU
# fork-ops 1000000	# stop after 1000000 bogo ops
# fork-max 2		# create 2 child processes per iteration

#
# futex stressor options:
#   start  N  workers  that  rapidly exercise the futex system call.
#   Each worker has two processes, a futex waiter and a futex waker.
#   The waiter waits with a very small timeout to stress the timeout
#   and rapid polled futex waiting. This is a Linux specific  stress
#   option.
#
futex 0			# 0 means 1 stressor per CPU
# futex-ops 1000000	# stop after 1000000 bogo ops

#
# inotify stressor options:
#   start N workers performing file system activities such  as  mak‐
#   ing/deleting  files/directories,  moving  files,  etc. to stress
#   exercise the various inotify events (Linux only).
#
inotify 0		# 0 means 1 stressor per CPU
# inotify-ops 1000000	# stop after 1000000 bogo ops

#
# kill stressor options:
#   start N workers sending SIGUSR1 kill signals to a SIG_IGN signal
#   handler. Most of the process time will end up in kernel space.
#
kill 0			# 0 means 1 stressor per CPU
# kill-ops 1000000	# stop after 1000000 bogo ops

#
# mmapfork stressor options:
#   start  N  workers that each fork off 32 child processes, each of
#   which tries to allocate some of the free memory left in the sys‐
#   tem  (and  trying  to  avoid any swapping).  The child processes
#   then hint that the allocation will be needed with madvise(2) and
#   then memset it to zero and hint that it is no longer needed with
#   madvise before exiting.  This produces significant amounts of VM
#   activity, a lot of cache misses and with minimal swapping.
#
mmapfork 0		# 0 means 1 stressor per CPU
# mmapfork-ops 1000000	# stop after 1000000 bogo ops

#
# mq stressor options:
#   start N sender and receiver processes that continually send  and
#   receive messages using POSIX message queues. (Linux only)
#
mq 0			# 0 means 1 stressor per CPU
# mq-ops 1000000	# stop after 1000000 bogo ops
# mq-size 10		# 10 messages in message queue

#
# msg stressor options:
#   start  N sender and receiver processes that continually send and
#   receive messages using System V message IPC.
#
msg 0			# 0 means 1 stressor per CPU
# msg-ops 1000000	# stop after 1000000 bogo ops

#
# netlink-proc stressor options:
#   start   N   workers  that  spawn  child  processes  and  monitor
#   fork/exec/exit process events via the  proc  netlink  connector.
#   Each  event  received is counted as a bogo op. This stressor can
#   only be run on Linux and with root privilege.
#
netlink-proc 0		# 0 means 1 stressor per CPU
# netlink-proc-ops 1000000 # stop after 1000000 bogo ops

#
# nice stressor options:
#   start N cpu consuming workers that exercise the  available  nice
#   levels.  Each  iteration  forks  off  a  child process that runs
#   through the all the nice levels running a busy loop for 0.1 sec‐
#   onds per level and then exits.
#
nice  0			# 0 means 1 stressor per CPU
# nice-ops 1000000	# stop after 1000000 bogo ops

#
# poll stressor options:
#   start  N  workers  that  perform  zero  timeout  polling via the
#   poll(2), select(2) and sleep(3) calls. This  wastes  system  and
#   user time doing nothing.
#
poll 0			# 0 means 1 stressor per CPU
# poll-ops 1000000	# stop after 1000000 bogo ops

#
# pthread stressor options:
#   start N workers that iteratively creates and terminates multiple
#   pthreads  (the  default  is  1024  pthreads per worker). In each
#   iteration, each newly created pthread waits until the worker has
#   created all the pthreads and then they all terminate together.
#
pthread 0		# 0 means 1 stressor per CPU
# pthread-ops 1000000	# stop after 1000000 bogo ops
# pthread-max 1024	# create 1024 pthreads per stressor

#
# schedpolicy stressor options:
#   start N workers that work set the worker  to  various  available
#   scheduling policies out of SCHED_OTHER, SCHED_BATCH, SCHED_IDLE,
#   SCHED_FIFO and SCHED_RR.  For the real time scheduling  policies
#   a random sched priority is selected between the minimum and max‐
#   imum scheduling prority settings.
#
schedpolicy 0		# 0 means 1 stressor per CPU
# schedpolicy-ops 1000000 # stop after 1000000 bogo ops

#
# sem stressor options:
#   start N workers that perform POSIX semaphore wait and post oper‐
#   ations. By default, a parent and  4  children  are  started  per
#   worker  to  provide  some  contention  on  the  semaphore.  This
#   stresses fast semaphore operations and  produces  rapid  context
#   switching.
#
sem 0			# 0 means 1 stressor per CPU
# sem-ops 1000000	# stop after 1000000 bogo ops
# sem-procs 4		# start 4 processes per stressor exercising
			# the semaphore
#
# sem-sysv stressor options:
#   start N workers that perform System V semaphore  wait  and  post
#   operations.  By default, a parent and 4 children are started per
#   worker  to  provide  some  contention  on  the  semaphore.  This
#   stresses  fast  semaphore  operations and produces rapid context
#   switching.
#
sem-sysv  0		# 0 means 1 stressor per CPU
# sem-sysv-ops 1000000	# stop after 1000000 bogo ops
# sem-sysv-procs 4	# start 4 processes per stressor exercising

#
# sleep stressor options:
#   start  N  workers that spawn off multiple threads that each per‐
#   form multiple sleeps of ranges 1us to 0.1s.  This creates multi‐
#   ple context switches and timer interrupts.
#
sleep 0			# 0 means 1 stressor per CPU
# sleep-ops 1000000	# stop after 1000000 bogo ops
# sleep-max 1024	# start 1034 threads per stressor

#
# spawn stressor options:
#   start N workers continually spawn children using  posix_spawn(3)
#   that  exec stress-ng and then exit almost immediately. Currently
#   Linux only.
#
spawn 0			# 0 means 1 stressor per CPU
# spawn-ops 1000000	# stop after 1000000 bogo ops

#
# switch stressor options:
#   start N workers that send messages via pipe to a child to  force
#   context switching.
#
switch 0		# 0 means 1 stressor per CPU
# switch-ops 1000000	# stop after 1000000 bogo ops

#
# tee stressor options:
#   move  data  from  a  writer  process to a reader process through
#   pipes and  to  /dev/null  without  any  copying  between  kernel
#   address  space and user address space using tee(2). This is only
#   available for Linux.
#
tee 0			# 0 means 1 stressor per CPU
# tee-ops 1000000	# stop after 1000000 bogo ops

#
# vfork stressor options:
#   start N workers continually vforking children  that  immediately
#   exit.
vfork 0			# 0 means 1 stressor per CPU
# vfork-ops 1000000	# stop after 1000000 bogo ops
# vfork-max 8		# create 8 processes per vfork iteration

#
# vforkmany stressor options:
#   start  N  workers that spawn off a chain of vfork children until
#   the process table  fills  up  and/or  vfork  fails.   vfork  can
#   rapidly  create  child  processes  and the parent process has to
#   wait until the child dies, so this stressor rapidly fills up the
#   process table.
#
vforkmany 0		# 0 means 1 stressor per CPU
# vforkmany-ops 1000000	# stop after 1000000 bogo ops

#
# wait stressor options:
#   start N workers that spawn off two  children;  one  spins  in  a
#   pause(2)  loop,  the  other  continually stops and continues the
#   first. The controlling process waits on the first  child  to  be
#   resumed   by  the  delivery  of  SIGCONT  using  waitpid(2)  and
#   waitid(2).
#
wait 0			# 0 means 1 stressor per CPU
# wait-ops 1000000	# stop after 1000000 bogo ops

#
# yield stressor options:
#   start N workers that call sched_yield(2). This stressor  ensures
#   that at least 2 child processes per CPU exercice shield_yield(2)
#   no matter how many workers are specified, thus  always  ensuring
#   rapid context switching.
#
yield 0			# 0 means 1 stressor per CPU
# yield-ops 1000000	# stop after 1000000 bogo ops

#
# zombie stressor options:
#   start  N workers that create zombie processes. This will rapidly
#   try to create a default of 8192 child processes that immediately
#   die  and wait in a zombie state until they are reaped.  Once the
#   maximum number of processes is reached (or  fork  fails  because
#   one has reached the maximum allowed number of children) the old‐
#   est child is reaped and a new  process  is  then  created  in  a
#   first-in first-out manner, and then repeated.
#
zombie 0		# 0 means 1 stressor per CPU
# zombie-ops 1000000	# stop after 1000000 bogo ops
# zombie-max 8192	# create 8192 processes per zombie iteration