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Message-ID: <20081123212459.75f0ca2d@daedalus.pq.iki.fi> Date: Sun, 23 Nov 2008 21:24:59 +0200 From: Pekka Paalanen <pq@....fi> To: Ingo Molnar <mingo@...e.hu> Cc: Steven Rostedt <rostedt@...dmis.org>, linux-kernel <linux-kernel@...r.kernel.org>, fweisbec@...il.com Subject: [PATCH 2/2] doc: update mmiotrace documentation >From 9fac48964c6d109589c9d610a727f72d2a1835dc Mon Sep 17 00:00:00 2001 From: Pekka Paalanen <pq@....fi> Date: Sun, 23 Nov 2008 20:59:56 +0200 Subject: [PATCH] doc: update mmiotrace documentation Update to reflect the current state of the tracing framework: - "none" tracer has been replaced by "nop" tracer - tracing_enabled must be toggled when changing buffer size Signed-off-by: Pekka Paalanen <pq@....fi> --- Documentation/tracers/mmiotrace.txt | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/Documentation/tracers/mmiotrace.txt b/Documentation/tracers/mmiotrace.txt index 5bbbe20..cde23b4 100644 --- a/Documentation/tracers/mmiotrace.txt +++ b/Documentation/tracers/mmiotrace.txt @@ -37,7 +37,7 @@ $ echo mmiotrace > /debug/tracing/current_tracer $ cat /debug/tracing/trace_pipe > mydump.txt & Start X or whatever. $ echo "X is up" > /debug/tracing/trace_marker -$ echo none > /debug/tracing/current_tracer +$ echo nop > /debug/tracing/current_tracer Check for lost events. @@ -66,7 +66,7 @@ which action. It is recommended to place descriptive markers about what you do. Shut down mmiotrace (requires root privileges): -$ echo none > /debug/tracing/current_tracer +$ echo nop > /debug/tracing/current_tracer The 'cat' process exits. If it does not, kill it by issuing 'fg' command and pressing ctrl+c. @@ -81,7 +81,9 @@ are: $ cat /debug/tracing/trace_entries gives you a number. Approximately double this number and write it back, for instance: +$ echo 0 > /debug/tracing/tracing_enabled $ echo 128000 > /debug/tracing/trace_entries +$ echo 1 > /debug/tracing/tracing_enabled Then start again from the top. If you are doing a trace for a driver project, e.g. Nouveau, you should also -- 1.5.6.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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