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authorBjörn-Egil Dahlberg <[email protected]>2010-06-01 16:24:21 +0200
committerRaimo Niskanen <[email protected]>2010-06-03 14:54:23 +0200
commit9757f9bfd78dec6ef7006eddbb7549e8e64e6a6f (patch)
tree1ea4030136145ad9d16ba50ca0e9371cef16170b /erts/doc/src
parent9a4c67fa6c6093b11e387247e1ca756edefbdbfe (diff)
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Add documentation for call time breakpoints
Documented call time breakpoints in - erlang:trace_pattern/3 - erlang:trace_info/2
Diffstat (limited to 'erts/doc/src')
-rw-r--r--erts/doc/src/erlang.xml34
1 files changed, 31 insertions, 3 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index c8fe7b4bd2..6f30c7fb21 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -6723,6 +6723,17 @@ true</pre>
See also
<seealso marker="#trace_pattern/3">erlang:trace_pattern/3</seealso>.</p>
</item>
+ <tag><c>call_time</c></tag>
+ <item>
+ <p>Return the call time values for this function or
+ <c>true</c> for the pseudo function <c>on_load</c> if call
+ time tracing is active. Returns <c>false</c> otherwise.
+ The call time values returned, <c>[{Pid, Count, S, Us}]</c>,
+ is a list of each process that has executed the function and its specific counters.
+ See also
+ <seealso marker="#trace_pattern/3">erlang:trace_pattern/3</seealso>.</p>
+ </item>
+
<tag><c>all</c></tag>
<item>
<p>Return a list containing the <c>{Item, Value}</c> tuples
@@ -6825,13 +6836,13 @@ true</pre>
</item>
<tag><c>restart</c></tag>
<item>
- <p>For the <c>FlagList</c> option <c>call_count</c>:
+ <p>For the <c>FlagList</c> option <c>call_count</c> and <c>call_time</c>:
restart the existing counters. The behaviour is undefined
for other <c>FlagList</c> options.</p>
</item>
<tag><c>pause</c></tag>
<item>
- <p>For the <c>FlagList</c> option <c>call_count</c>: pause
+ <p>For the <c>FlagList</c> option <c>call_count</c> and <c>call_time</c>: pause
the existing counters. The behaviour is undefined for
other <c>FlagList</c> options.</p>
</item>
@@ -6886,6 +6897,23 @@ true</pre>
<p>The counter value can be read with
<seealso marker="#trace_info/2">erlang:trace_info/2</seealso>.</p>
</item>
+ <tag><c>call_time</c></tag>
+ <item>
+ <p>Starts (<c>MatchSpec == true</c>) or stops
+ (<c>MatchSpec == false</c>) call time tracing for all
+ types of function calls. For every function a counter is
+ incremented when the function is called. Time spent in the function
+ is accumulated in two other counters, seconds and micro-seconds.
+ The counters are stored for each call traced process.</p>
+ <p>If call time tracing is started while already running,
+ the count and time is restarted from zero. Running counters can be
+ paused with <c>MatchSpec == pause</c>. Paused and running
+ counters can be restarted from zero with
+ <c>MatchSpec == restart</c>.</p>
+ <p>The counter value can be read with
+ <seealso marker="#trace_info/2">erlang:trace_info/2</seealso>.</p>
+ </item>
+
</taglist>
<p>The <c>global</c> and <c>local</c> options are mutually
exclusive and <c>global</c> is the default (if no options are
@@ -6893,7 +6921,7 @@ true</pre>
perform a kind of local tracing, and can also not be combined
with <c>global</c>. A function can be either globally or
locally traced. If global tracing is specified for a
- specified set of functions; local, meta and call count
+ specified set of functions; local, meta, call time and call count
tracing for the matching set of local functions will be
disabled, and vice versa.</p>
<p>When disabling trace, the option must match the type of trace