NAME

       eventstat - a tool to measure system events.

SYNOPSIS

       eventstat [options] [delay [count]]

DESCRIPTION

       eventstat  is  a program that dumps the current active system events that are added to the
       kernel timer list.

OPTIONS

       eventstat options are as follow:

       -b     just report events, PID and process name. By default the short task name  from  the
              kernel comm field will be displayed, however the -s and -l options will report more
              process name information.

       -c     report cumulative events rather than events per sample period.

       -C     report the sample event count in the CSV output rather than the default events  per
              second rate.

       -d     strip full directory path off the process name in the CSV output.

       -h     show help.

       -i     show timer ID information.

       -k     report just kernel threads.

       -l     report  long process name from /proc/pid/cmdline. This reports the process name and
              all the command line arguments.

       -n event_count
              only display the first event_count number of top events.

       -q     run quietly, only really makes sense with -r option.

       -r csv_file
              output gathered data in a comma separated values file. This can  be  then  imported
              and graphed using your favourite open source spread sheet.

       -s     report  short  process  name  from /proc/pid/cmdline. This reports just the process
              name.

       -S     report the minimum, maximum, average and population standard deviation at  the  end
              of the CSV output.

       -t threshold
              ignore samples where the event delta per second less than the given threshold.

       -T     enable 'top' mode, refresh display on each update.

       -u     report just user space processes.

       -w     add timestamp (the "whence" info) to the output.

EXAMPLES

       Dump events every second until stopped.
               sudo eventstat

       Dump the top 20 events every 60 seconds until stopped.
               sudo eventstat -n 20 60

       Dump events every 10 seconds just 5 times.
               sudo eventstat 10 5

       Quietly dump events every 10 seconds just 5 times into a CSV file with short process name.
               sudo eventstat 10 5 -q -s -r results.csv

CSV OUTPUT

       The  -r  option  generates  a  comma  separated  file  report  that  can  be imported into
       spreadsheets or parsed using text processing tools.  Column 1 of the data is the label for
       each row, columns 2 onwards contain the data for each task that generated a wakeup event.

       The first row lists the task name of the thread or process. Task names in [ ] brackets are
       kernel threads, other tasks are the names of user space processes.  By default these names
       are  derived from the task names from kernel trace events but the -s -l options fetch more
       complete task names from /proc/pid/cmdline instead.

       The second and third rows list the names of the internal Linux kernel timer init function.

       The fourth row lists the total number of wakeup events for each task during the entire run
       of eventstat.

       The  subsequent  rows  list  the  average number of wakeups per second measured during the
       sample interval for each task in column two onwards. The first column indicates the sample
       time (in seconds) since the start of the measuring.

NOTES

       Version  4.0  of eventstat gathers event timer data from the kernel trace event timers and
       hence is not compatible with previous versions of eventstat.  The  move  to  using  kernel
       trace   events   was   necessary  as  the  Linux  4.12  kernel  dropped  support  for  the
       /proc/timer_stats interface.

SEE ALSO

       powertop(8), top(1)

AUTHOR

       eventstat was written by Colin King <colin.king@canonical.com>

       This manual page was written  by  Colin  King  <colin.i.king@gmail.com>,  for  the  Ubuntu
       project (but may be used by others).

COPYRIGHT

       Copyright © 2011-2021 Canonical Ltd, Copyright © 2021-2022 Colin Ian King.
       This  is  free software; see the source for copying conditions.  There is NO warranty; not
       even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

                                        November 10, 2021                            EVENTSTAT(8)