summaryrefslogtreecommitdiffstats
path: root/plugins.d/loopsleepms.sh.inc
diff options
context:
space:
mode:
Diffstat (limited to 'plugins.d/loopsleepms.sh.inc')
-rw-r--r--plugins.d/loopsleepms.sh.inc189
1 files changed, 0 insertions, 189 deletions
diff --git a/plugins.d/loopsleepms.sh.inc b/plugins.d/loopsleepms.sh.inc
deleted file mode 100644
index ef3db192d..000000000
--- a/plugins.d/loopsleepms.sh.inc
+++ /dev/null
@@ -1,189 +0,0 @@
-# no need for shebang - this file is included from other scripts
-
-LOOPSLEEP_DATE="$(which date 2>/dev/null || command -v date 2>/dev/null)"
-if [ -z "$LOOPSLEEP_DATE" ]
- then
- echo >&2 "$0: ERROR: Cannot find the command 'date' in the system path."
- exit 1
-fi
-
-# -----------------------------------------------------------------------------
-# use the date command as a high resolution timer
-
-now_ms=
-LOOPSLEEPMS_HIGHRES=1
-test "$($LOOPSLEEP_DATE +%N)" = "%N" && LOOPSLEEPMS_HIGHRES=0
-test -z "$($LOOPSLEEP_DATE +%N)" && LOOPSLEEPMS_HIGHRES=0
-current_time_ms_from_date() {
- if [ $LOOPSLEEPMS_HIGHRES -eq 0 ]
- then
- now_ms="$($LOOPSLEEP_DATE +'%s')000"
- else
- now_ms="$(( $( $LOOPSLEEP_DATE +'%s * 1000 + %-N / 1000000' ) ))"
- fi
-}
-
-# -----------------------------------------------------------------------------
-# use /proc/uptime as a high resolution timer
-
-current_time_ms_from_date
-current_time_ms_from_uptime_started="${now_ms}"
-current_time_ms_from_uptime_last="${now_ms}"
-current_time_ms_from_uptime_first=0
-current_time_ms_from_uptime() {
- local up rest arr=() n
-
- read up rest </proc/uptime
- if [ $? -ne 0 ]
- then
- echo >&2 "$0: Cannot read /proc/uptime - falling back to current_time_ms_from_date()."
- current_time_ms="current_time_ms_from_date"
- current_time_ms_from_date
- current_time_ms_accuracy=1
- return
- fi
-
- arr=(${up//./ })
-
- if [ ${#arr[1]} -lt 1 ]
- then
- n="${arr[0]}000"
- elif [ ${#arr[1]} -lt 2 ]
- then
- n="${arr[0]}${arr[1]}00"
- elif [ ${#arr[1]} -lt 3 ]
- then
- n="${arr[0]}${arr[1]}0"
- else
- n="${arr[0]}${arr[1]}"
- fi
-
- now_ms=$((current_time_ms_from_uptime_started - current_time_ms_from_uptime_first + n))
-
- if [ "${now_ms}" -lt "${current_time_ms_from_uptime_last}" ]
- then
- echo >&2 "$0: Cannot use current_time_ms_from_uptime() - new time ${now_ms} is older than the last ${current_time_ms_from_uptime_last} - falling back to current_time_ms_from_date()."
- current_time_ms="current_time_ms_from_date"
- current_time_ms_from_date
- current_time_ms_accuracy=1
- fi
-
- current_time_ms_from_uptime_last="${now_ms}"
-}
-current_time_ms_from_uptime
-current_time_ms_from_uptime_first="$((now_ms - current_time_ms_from_uptime_started))"
-current_time_ms_from_uptime_last="${current_time_ms_from_uptime_first}"
-current_time_ms="current_time_ms_from_uptime"
-current_time_ms_accuracy=10
-if [ "${current_time_ms_from_uptime_first}" -eq 0 ]
- then
- echo >&2 "$0: Invalid setup for current_time_ms_from_uptime() - falling back to current_time_ms_from_date()."
- current_time_ms="current_time_ms_from_date"
- current_time_ms_accuracy=1
-fi
-
-# -----------------------------------------------------------------------------
-# use read with timeout for sleep
-
-mysleep="mysleep_read"
-
-mysleep_fifo="${NETDATA_CACHE_DIR-/tmp}/.netdata_bash_sleep_timer_fifo"
-[ ! -e "${mysleep_fifo}" ] && mkfifo "${mysleep_fifo}"
-[ ! -e "${mysleep_fifo}" ] && mysleep="sleep"
-
-mysleep_read() {
- read -t "${1}" <>"${mysleep_fifo}"
- ret=$?
- if [ $ret -le 128 ]
- then
- echo >&2 "$0: Cannot use read for sleeping (return code ${ret})."
- mysleep="sleep"
- ${mysleep} "${1}"
- fi
-}
-
-
-# -----------------------------------------------------------------------------
-# this function is used to sleep a fraction of a second
-# it calculates the difference between every time is called
-# and tries to align the sleep time to give you exactly the
-# loop you need.
-
-LOOPSLEEPMS_LASTRUN=0
-LOOPSLEEPMS_NEXTRUN=0
-LOOPSLEEPMS_LASTSLEEP=0
-LOOPSLEEPMS_LASTWORK=0
-
-loopsleepms() {
- local tellwork=0 t="${1}" div s m now mstosleep
-
- if [ "${t}" = "tellwork" ]
- then
- tellwork=1
- shift
- t="${1}"
- fi
-
- # $t = the time in seconds to wait
-
- # if high resolution is not supported
- # just sleep the time requested, in seconds
- if [ ${LOOPSLEEPMS_HIGHRES} -eq 0 ]
- then
- sleep ${t}
- return
- fi
-
- # get the current time, in ms in ${now_ms}
- ${current_time_ms}
-
- # calculate ms since last run
- [ ${LOOPSLEEPMS_LASTRUN} -gt 0 ] && \
- LOOPSLEEPMS_LASTWORK=$((now_ms - LOOPSLEEPMS_LASTRUN - LOOPSLEEPMS_LASTSLEEP + current_time_ms_accuracy))
- # echo "# last loop's work took $LOOPSLEEPMS_LASTWORK ms"
-
- # remember this run
- LOOPSLEEPMS_LASTRUN=${now_ms}
-
- # calculate the next run
- LOOPSLEEPMS_NEXTRUN=$(( ( now_ms - ( now_ms % ( t * 1000 ) ) ) + ( t * 1000 ) ))
-
- # calculate ms to sleep
- mstosleep=$(( LOOPSLEEPMS_NEXTRUN - now_ms + current_time_ms_accuracy ))
- # echo "# mstosleep is $mstosleep ms"
-
- # if we are too slow, sleep some time
- test ${mstosleep} -lt 200 && mstosleep=200
-
- s=$(( mstosleep / 1000 ))
- m=$(( mstosleep - (s * 1000) ))
- [ "${m}" -lt 100 ] && m="0${m}"
- [ "${m}" -lt 10 ] && m="0${m}"
-
- test $tellwork -eq 1 && echo >&2 " >>> PERFORMANCE >>> WORK TOOK ${LOOPSLEEPMS_LASTWORK} ms ( $((LOOPSLEEPMS_LASTWORK * 100 / 1000)).$((LOOPSLEEPMS_LASTWORK % 10))% cpu ) >>> SLEEPING ${mstosleep} ms"
-
- # echo "# sleeping ${s}.${m}"
- # echo
- ${mysleep} ${s}.${m}
-
- # keep the values we need
- # for our next run
- LOOPSLEEPMS_LASTSLEEP=$mstosleep
-}
-
-# test it
-#while [ 1 ]
-#do
-# r=$(( (RANDOM * 2000 / 32767) ))
-# s=$((r / 1000))
-# m=$((r - (s * 1000)))
-# [ "${m}" -lt 100 ] && m="0${m}"
-# [ "${m}" -lt 10 ] && m="0${m}"
-# echo "${r} = ${s}.${m}"
-#
-# # the work
-# ${mysleep} ${s}.${m}
-#
-# # the alignment loop
-# loopsleepms tellwork 1
-#done