path: root/Documentation/trace
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authorPaul Gortmaker <paul.gortmaker@windriver.com>2013-01-11 13:43:45 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-01-26 00:39:12 +0100
commit43720bd6014327ac454434496cb953edcdb9f8d6 (patch)
treebe134a588abb3164b7c5f9093707e536f9c54a05 /Documentation/trace
parented1ac6e91a3ff7c561008ba57747cd6cbc49385e (diff)
PM / tracing: remove deprecated power trace API
The text in Documentation said it would be removed in 2.6.41; the text in the Kconfig said removal in the 3.1 release. Either way you look at it, we are well past both, so push it off a cliff. Note that the POWER_CSTATE and the POWER_PSTATE are part of the legacy tracing API. Remove all tracepoints which use these flags. As can be seen from context, most already have a trace entry via trace_cpu_idle anyways. Also, the cpufreq/cpufreq.c PSTATE one is actually unpaired, as compared to the CSTATE ones which all have a clear start/stop. As part of this, the trace_power_frequency also becomes orphaned, so it too is deleted. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/trace')
1 files changed, 1 insertions, 26 deletions
diff --git a/Documentation/trace/events-power.txt b/Documentation/trace/events-power.txt
index cf794af22855..e1498ff8cf94 100644
--- a/Documentation/trace/events-power.txt
+++ b/Documentation/trace/events-power.txt
@@ -17,7 +17,7 @@ Cf. include/trace/events/power.h for the events definitions.
1. Power state switch events
-1.1 New trace API
+1.1 Trace API
A 'cpu' event class gathers the CPU-related events: cpuidle and
@@ -41,31 +41,6 @@ The event which has 'state=4294967295' in the trace is very important to the use
space tools which are using it to detect the end of the current state, and so to
correctly draw the states diagrams and to calculate accurate statistics etc.
-A new Kconfig option CONFIG_EVENT_POWER_TRACING_DEPRECATED with the default value of
-'y' has been created. This allows the legacy trace power API to be used conjointly
-with the new trace API.
-The Kconfig option, the old trace API (in include/trace/events/power.h) and the
-old trace points will disappear in a future release (namely 2.6.41).
-power_start "type=%lu state=%lu cpu_id=%lu"
-power_frequency "type=%lu state=%lu cpu_id=%lu"
-power_end "cpu_id=%lu"
-The 'type' parameter takes one of those macros:
- . POWER_NONE = 0,
- . POWER_CSTATE = 1, /* C-State */
- . POWER_PSTATE = 2, /* Frequency change or DVFS */
-The 'state' parameter is set depending on the type:
- . Target C-state for type=POWER_CSTATE,
- . Target frequency for type=POWER_PSTATE,
-power_end is used to indicate the exit of a state, corresponding to the latest
-power_start event.
2. Clocks events
The clock events are used for clock enable/disable and for