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<link title="Dominators" rel="Chapter" href="Dominators.html"><title>CIL API Documentation (version 1.3.7) : Stats</title>
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<center><h1>Module <a href="type_Stats.html">Stats</a></h1></center>
<br>
<pre><span class="keyword">module</span> Stats: <code class="code">sig</code> <a href="Stats.html">..</a> <code class="code">end</code></pre>Utilities for maintaining timing statistics<br>
<hr width="100%">
<br><code><span class="keyword">type</span> <a name="TYPEtimerModeEnum"></a><code class="type"></code>timerModeEnum = </code><table class="typetable">
<tr>
<td align="left" valign="top" >
<code><span class="keyword">|</span></code></td>
<td align="left" valign="top" >
<code><span class="constructor">Disabled</span></code></td>
<td class="typefieldcomment" align="left" valign="top" ><code>(*</code></td><td class="typefieldcomment" align="left" valign="top" >Do not collect timing information</td><td class="typefieldcomment" align="left" valign="bottom" ><code>*)</code></td>
</tr>
<tr>
<td align="left" valign="top" >
<code><span class="keyword">|</span></code></td>
<td align="left" valign="top" >
<code><span class="constructor">SoftwareTimer</span></code></td>
<td class="typefieldcomment" align="left" valign="top" ><code>(*</code></td><td class="typefieldcomment" align="left" valign="top" >Use OCaml's <code class="code">Unix.time</code> for timing information</td><td class="typefieldcomment" align="left" valign="bottom" ><code>*)</code></td>
</tr>
<tr>
<td align="left" valign="top" >
<code><span class="keyword">|</span></code></td>
<td align="left" valign="top" >
<code><span class="constructor">HardwareTimer</span></code></td>
<td class="typefieldcomment" align="left" valign="top" ><code>(*</code></td><td class="typefieldcomment" align="left" valign="top" >Use the Pentium's cycle counter to time code</td><td class="typefieldcomment" align="left" valign="bottom" ><code>*)</code></td>
</tr>
<tr>
<td align="left" valign="top" >
<code><span class="keyword">|</span></code></td>
<td align="left" valign="top" >
<code><span class="constructor">HardwareIfAvail</span></code></td>
<td class="typefieldcomment" align="left" valign="top" ><code>(*</code></td><td class="typefieldcomment" align="left" valign="top" >Use the hardware cycle counter if availible;
otherwise use SoftwareTimer</td><td class="typefieldcomment" align="left" valign="bottom" ><code>*)</code></td>
</tr></table>
<div class="info">
Whether to use the performance counters (on Pentium only)<br>
</div>
<pre><span class="keyword">val</span> <a name="VALreset"></a>reset : <code class="type"><a href="Stats.html#TYPEtimerModeEnum">timerModeEnum</a> -> unit</code></pre><div class="info">
Resets all the timings and specifies the method to use for future timings.
Call this before doing any timing.
<p>
You will get an exception if you pass HardwareTimer to reset and the
hardware counters are not available<br>
</div>
<pre><span class="keyword">exception</span> <a name="EXCEPTIONNoPerfCount"></a>NoPerfCount</pre>
<pre><span class="keyword">val</span> <a name="VALcountCalls"></a>countCalls : <code class="type">bool ref</code></pre><div class="info">
Flag to indicate whether or not to count the number of calls of
to <a href="Stats.html#VALrepeattime"><code class="code">Stats.repeattime</code></a> or <a href="Stats.html#VALtime"><code class="code">Stats.time</code></a> for each label.
(default: false)<br>
</div>
<pre><span class="keyword">val</span> <a name="VALhas_performance_counters"></a>has_performance_counters : <code class="type">unit -> bool</code></pre><div class="info">
Check if we have performance counters<br>
</div>
<pre><span class="keyword">val</span> <a name="VALsample_pentium_perfcount_20"></a>sample_pentium_perfcount_20 : <code class="type">unit -> int</code></pre><div class="info">
Sample the current cycle count, in megacycles.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALsample_pentium_perfcount_10"></a>sample_pentium_perfcount_10 : <code class="type">unit -> int</code></pre><div class="info">
Sample the current cycle count, in kilocycles.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALtime"></a>time : <code class="type">string -> ('a -> 'b) -> 'a -> 'b</code></pre><div class="info">
Time a function and associate the time with the given string. If some
timing information is already associated with that string, then accumulate
the times. If this function is invoked within another timed function then
you can have a hierarchy of timings<br>
</div>
<pre><span class="keyword">val</span> <a name="VALrepeattime"></a>repeattime : <code class="type">float -> string -> ('a -> 'b) -> 'a -> 'b</code></pre><div class="info">
repeattime is like time but runs the function several times until the total
running time is greater or equal to the first argument. The total time is
then divided by the number of times the function was run.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALprint"></a>print : <code class="type">out_channel -> string -> unit</code></pre><div class="info">
Print the current stats preceeded by a message<br>
</div>
<pre><span class="keyword">val</span> <a name="VALlookupTime"></a>lookupTime : <code class="type">string -> float</code></pre><div class="info">
Return the cumulative time of all calls to <a href="Stats.html#VALtime"><code class="code">Stats.time</code></a> and
<a href="Stats.html#VALrepeattime"><code class="code">Stats.repeattime</code></a> with the given label.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALtimethis"></a>timethis : <code class="type">('a -> 'b) -> 'a -> 'b</code></pre><div class="info">
Time a function and set lastTime to the time it took<br>
</div>
<pre><span class="keyword">val</span> <a name="VALlastTime"></a>lastTime : <code class="type">float ref</code></pre></body></html>
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