This is the mail archive of the
systemtap@sourceware.org
mailing list for the systemtap project.
Re: proposed instruction trace support in SystemTap
- From: fche at redhat dot com (Frank Ch. Eigler)
- To: Dave Nomura <dcnltc at us dot ibm dot com>
- Cc: Roland McGrath <roland at redhat dot com>, systemtap at sourceware dot org, Maynard Johnson <mpjohn at us dot ibm dot com>, James Keniston <kenistoj at us dot ibm dot com>
- Date: Tue, 28 Aug 2007 12:29:19 -0400
- Subject: Re: proposed instruction trace support in SystemTap
- References: <20070819204722.E3A9A4D058C@magilla.localdomain> <46CF46C0.6070602@us.ibm.com>
Dave Nomura <dcnltc@us.ibm.com> writes:
> It appears that ptrace() wouldn't be able to deliver acceptable
> performance for instruction tracing. Do you think that utrace would
> be a reasonable alternative?
That's what Roland is saying. The next question is "who shall
prototype a single-stepping-on-top-of-utrace kernel module?". With
such a prototype in hand, plopping support into systemtap is a small
step beyond.
- FChE