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#! /usr/bin/env stap
# General interval measurement / monitor. Gives a report of event interval measurement on a
# per-process or systemwide basis.
#
# Invoke with a list of probe point patterns as script command-line arguments:
# stap measureinterval.stp 'measurement' 'match' 'accumulation' 'start_event(s)' 'end_event(s)'
#
global interval%, acc%
probe $4
{
measure = $1
if ($2 in interval) {
acc[%($# >= 6 %? $6 %: 0 %)] <<< measure - interval[$2]
}
interval[$2] = measure;
}
# optional end of pipeline probe
probe %($# >= 5 %? $5 %: never %)
{
measure = $1
if ($2 in interval) {
acc[%($# >= 6 %? $6 %: 0 %)] <<< measure - interval[$2]
delete interval[$2]
}
}
function report()
{
print("\n");
foreach(i+ in acc){
printdln("=", "id", i)
println($3(acc[i]))
}
}
probe end {report()}
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