Date: Fri, 18 Nov 2005 17:25:42 -0500 (EST)
From: Steven Rostedt <rostedt@goodmis.org>
To: Lee Revell <rlrevell@joe-job.com>
cc: Ingo Molnar <mingo@elte.hu>,
       Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU>,
       linux-kernel@vger.kernel.org, "Paul E. McKenney" <paulmck@us.ibm.com>,
       "K.R. Foley" <kr@cybsft.com>, Thomas Gleixner <tglx@linutronix.de>,
       pluto@agmk.net, john cooper <john.cooper@timesys.com>,
       Benedikt Spranger <bene@linutronix.de>,
       Daniel Walker <dwalker@mvista.com>,
       Tom Rini <trini@kernel.crashing.org>,
       George Anzinger <george@mvista.com>
Subject: Re: 2.6.14-rt13
In-Reply-To: <1132352143.6874.31.camel@mindpipe>
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References: <20051115090827.GA20411@elte.hu>  <1132336954.20672.11.camel@cmn3.stanford.edu>
  <1132350882.6874.23.camel@mindpipe>  <1132351533.4735.37.camel@cmn3.stanford.edu>
  <20051118220755.GA3029@elte.hu> <1132352143.6874.31.camel@mindpipe>
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On Fri, 18 Nov 2005, Lee Revell wrote:

> On Fri, 2005-11-18 at 23:07 +0100, Ingo Molnar wrote:
> > * Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU> wrote:
> >
> > > Arghhh, at least I take this as a confirmation that the TSCs do drift
> > > and there is no workaround. It currently makes the -rt/Jack
> > > combination not very useful, at least in my tests.
> > >
> > > Is there a way to resync the TSCs?
> >
> > no reasonable way. Does idle=poll make any difference?
>
> But JACK itself uses rdtsc() for timing calculations so TSC drift is
> invariably fatal.

Can it simply be pinned to a cpu?

-- Steve

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