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benchmarking latency to create and install instrumentation
- From: William Cohen <wcohen at redhat dot com>
- To: SystemTAP <systemtap at sources dot redhat dot com>
- Date: Fri, 03 Mar 2006 11:19:41 -0500
- Subject: benchmarking latency to create and install instrumentation
Earlier this week I added some instrumentation to the testsuite to
record the amount of time required to do the various phases in the
systemtap instrumentation. This information is generated for anything in
the testsuite that uses lib/stap_run.exp or lib/stap_run2.exp.
There is a really stupid script, tests/tools/stap_metrics that extracts
that information and can mail it off.
I have massaged the data from the FC5 nightly runs for i686 and x86_64
into an open office spread sheet. The i686 machine I am using is a
relatively slow pentium III machine. The basic characteristic to note is
that much of the latency is due to the build of the object code from the
generated C code in phase 4.
I have attached the spread sheet to this email.
-Will
Attachment:
stap_metrics_200603030930.ods
Description: application/vnd.oasis.opendocument.spreadsheet