Re: 2.6.24-rc8-rt1

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To: Steven Rostedt <rostedt@...>
Cc: LKML <linux-kernel@...>, RT <linux-rt-users@...>, Ingo Molnar <mingo@...>, Thomas Gleixner <tglx@...>
Date: Thursday, January 17, 2008 - 6:13 am

Steven Rostedt wrote:

It builds and runs fine on my Icecube-MPC5200 board, now also with the
latency tracer enabled. That's great. Still, "cyclictest -n -p80 -i1000"
reports latencies up to 400 us and therefore I tried to trigger and save
a high latency trace using:

  # ./cyclictest -n -p80 -i1000 -b400
  1.21 0.33 0.11 4/42 1048

  T: 0 (  914) P:80 I:1000 C:  38726 Min:     61 Act:  107 Avg:  106
Max:     377
  [   91.042169] (      cyclictest-914  |#0): new 39733427 us user-latency.
  bash-3.00# cat /proc/latency_trace > trace.log

Well, I'm not sure if this is the correct way to do it. Is there some
doc on how to use the latency tracer and interpret the results?
Nevertheless, I have attached the beginning of trace.log. Maybe it rings
an experts bell.

TIA.

Wolfgang.
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Messages in current thread:
2.6.24-rc8-rt1, Steven Rostedt, (Thu Jan 17, 12:27 am)
Re: 2.6.24-rc8-rt1, Mariusz Kozlowski, (Thu Jan 17, 3:57 pm)
Re: 2.6.24-rc8-rt1, Wolfgang Grandegger, (Thu Jan 17, 6:13 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc, Wolfgang Grandegger, (Wed Jan 23, 12:36 pm)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc, Wolfgang Grandegger, (Mon Jan 28, 11:38 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Tue Jan 29, 9:38 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Wed Jan 30, 4:18 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Wed Jan 30, 6:45 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Wed Jan 30, 7:22 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Tue Jul 1, 10:27 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Wed Jul 2, 4:09 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Sun Jul 6, 5:34 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Tue Jul 1, 12:11 pm)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Wed Jul 2, 7:03 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Tue Aug 5, 11:40 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Sun Jul 6, 5:41 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Tue Jul 8, 3:43 pm)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Wed Jul 9, 9:15 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - R..., Wolfgang Grandegger, (Thu Jul 10, 3:50 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc, Wolfgang Grandegger, (Thu Jan 24, 6:53 am)
Re: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc, Daniel Walker, (Wed Jan 23, 11:50 am)
Re: 2.6.24-rc8-rt1, Robert Schwebel, (Thu Jan 17, 5:11 pm)
Re: 2.6.24-rc8-rt1, Wolfgang Grandegger, (Thu Jan 17, 5:36 pm)
Re: 2.6.24-rc8-rt1, Daniel Walker, (Thu Jan 17, 12:17 pm)
Re: 2.6.24-rc8-rt1, Wolfgang Grandegger, (Thu Jan 17, 2:17 pm)
Re: 2.6.24-rc8-rt1, Daniel Walker, (Thu Jan 17, 2:30 pm)
Re: 2.6.24-rc8-rt1, Wolfgang Grandegger, (Thu Jan 17, 2:46 pm)
Re: 2.6.24-rc8-rt1, Steven Rostedt, (Thu Jan 17, 2:45 pm)
Re: 2.6.24-rc8-rt1, Wolfgang Grandegger, (Thu Jan 17, 4:01 pm)
Re: 2.6.24-rc8-rt1, Steven Rostedt, (Thu Jan 17, 2:44 pm)
Re: 2.6.24-rc8-rt1, Luotao Fu, (Thu Jan 17, 8:46 am)
Re: 2.6.24-rc8-rt1, Mark Knecht, (Thu Jan 17, 1:26 am)