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Re: LTTng-UST vs SystemTap userspace tracing benchmarks

From: Josh Stone <jistone at redhat dot com>
To: Julien Desfossez <julien dot desfossez at polymtl dot ca>
Cc: Tom Tromey <tromey at redhat dot com>, ltt-dev at lists dot casi dot polymtl dot ca, systemtap at sources dot redhat dot com, Mathieu Desnoyers <mathieu dot desnoyers at efficios dot com>, dominique dot toupin at ericsson dot com
Date: Thu, 17 Feb 2011 11:47:11 -0800
Subject: Re: LTTng-UST vs SystemTap userspace tracing benchmarks
References: <4D5AA164.1050607@polymtl.ca> <m37hd06lpj.fsf@fleche.redhat.com> <4D5D5BEF.4040809@polymtl.ca> <4D5D72CF.10402@redhat.com> <4D5D7812.5000104@polymtl.ca>

On 02/17/2011 11:33 AM, Julien Desfossez wrote:
> Ok, my bad, I copied an older version of the test, when I setup the
> repository, its fixed now. It doesn't change the earlier results which
> was done with the mark, just the one I posted today.

Your original results were also using stap 1.2, which doesn't have the
NOP-singlestep optimization I described.  Please use our latest 1.4 for
the best comparison.  (and be sure the old uprobes.ko is unloaded)

> Ok, I will do these tests on the same machine and post the results soon.

Great, thanks.

Josh

References:
- LTTng-UST vs SystemTap userspace tracing benchmarks
  - From: Julien Desfossez
- Re: LTTng-UST vs SystemTap userspace tracing benchmarks
  - From: Tom Tromey
- Re: LTTng-UST vs SystemTap userspace tracing benchmarks
  - From: Julien Desfossez
- Re: LTTng-UST vs SystemTap userspace tracing benchmarks
  - From: Josh Stone
- Re: LTTng-UST vs SystemTap userspace tracing benchmarks
  - From: Julien Desfossez

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