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Re: new static user probe types
- From: Stan Cox <scox at redhat dot com>
- To: systemtap at sourceware dot org
- Date: Mon, 20 Jul 2009 14:34:23 -0400
- Subject: Re: new static user probe types
- References: <4A453D09.60600@redhat.com> <4A5E0195.5080803@redhat.com>
I did some tweaking and a bit more testing. Running a program which
invokes a probe in a loop. Invoked via stap running a script with only
a begin in it.
utrace 0.71user 0.34system 0:01.10elapsed # probe is a syscall, no arg setup
kprobe 0.72user 0.33system 0:01.09elapsed # probe is a syscall, no arg setup
uprobe 0.57user 0.09system 0:00.68elapsed # probe is a nop, possibly
also arg setup
Invoked via stap running a script which actually has handlers for the probes
utrace 0.82user 4.28system 0:05.17elapsed
kprobe 1.59user 5.18system 0:08.50elapsed
uprobe 1.17user 11.12system 0:12.35elapsed