Current File : //usr/share/systemtap/examples/apps/stap_time.meta
title: Provide elapsed times for Passes of SystemTap script compilation
name: stap_time.stp
application: systemtap
requires: systemtap
keywords: application trace
exit: user-controlled
output: trace
scope: system-wide
description: SystemTap has multiple passes to convert the text of a SystemTap script into instrumentation that actually collect data on the system. The stap_time.stp script uses the markers in SystemTap to note the amount of time that each of the passes requires. When SystemTap completes pass 4 (compiling the instrumentation into a kernel module) the script print out the script name followed by the amount of time in milliseconds required for Pass 0 (command line option parsing), Pass 1 (script parsing), Pass 2 (elaboration), Pass 3 (code generation), and Pass 4 (module compilation). The resulting data can be analyzed to determine if there are issues with the amount of time that systemtap takes to generate instrumentation.
test_check: stap -p4 stap_time.stp
test_installcheck: stap stap_time.stp -T 1
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