<!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta name="generator" content="AsciiDoc 8.6.8"> <title>MLtonProfile</title> <link rel="stylesheet" href="./asciidoc.css" type="text/css"> <link rel="stylesheet" href="./pygments.css" type="text/css"> <script type="text/javascript" src="./asciidoc.js"></script> <script type="text/javascript"> /*<![CDATA[*/ asciidoc.install(); /*]]>*/ </script> <link rel="stylesheet" href="./mlton.css" type="text/css"/> </head> <body class="article"> <div id="banner"> <div id="banner-home"> <a href="./Home">MLton 20130715</a> </div> </div> <div id="header"> <h1>MLtonProfile</h1> </div> <div id="content"> <div id="preamble"> <div class="sectionbody"> <div class="listingblock"> <div class="content"><div class="highlight"><pre><span class="k">signature</span><span class="w"> </span><span class="n">MLTON_PROFILE</span><span class="w"> </span><span class="p">=</span><span class="w"></span> <span class="w"> </span><span class="k">sig</span><span class="w"></span> <span class="w"> </span><span class="k">structure</span><span class="w"> </span><span class="n">Data</span><span class="p">:</span><span class="w"></span> <span class="w"> </span><span class="k">sig</span><span class="w"></span> <span class="w"> </span><span class="k">type</span><span class="w"> </span><span class="n">t</span><span class="w"></span> <span class="w"> </span><span class="k">val</span><span class="w"> </span><span class="n">equals</span><span class="p">:</span><span class="w"> </span><span class="n">t</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">t</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">bool</span><span class="w"></span> <span class="w"> </span><span class="k">val</span><span class="w"> </span><span class="n">free</span><span class="p">:</span><span class="w"> </span><span class="n">t</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="w"></span> <span class="w"> </span><span class="k">val</span><span class="w"> </span><span class="n">malloc</span><span class="p">:</span><span class="w"> </span><span class="n">unit</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">t</span><span class="w"></span> <span class="w"> </span><span class="k">val</span><span class="w"> </span><span class="n">write</span><span class="p">:</span><span class="w"> </span><span class="n">t</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">string</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">unit</span><span class="w"></span> <span class="w"> </span><span class="k">end</span><span class="w"></span> <span class="w"> </span><span class="k">val</span><span class="w"> </span><span class="n">isOn</span><span class="p">:</span><span class="w"> </span><span class="n">bool</span><span class="w"></span> <span class="w"> </span><span class="k">val</span><span class="w"> </span><span class="n">withData</span><span class="p">:</span><span class="w"> </span><span class="n">Data</span><span class="p">.</span><span class="n">t</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="p">(</span><span class="n">unit</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">'a</span><span class="p">)</span><span class="w"> </span><span class="p">-></span><span class="w"> </span><span class="n">'a</span><span class="w"></span> <span class="w"> </span><span class="k">end</span><span class="w"></span> </pre></div></div></div> <div class="paragraph"><p><span class="monospaced">MLton.Profile</span> provides <a href="Profiling">Profiling</a> control from within the program, allowing you to profile individual portions of your program. With <span class="monospaced">MLton.Profile</span>, you can create many units of profiling data (essentially, mappings from functions to counts) during a run of a program, switch between them while the program is running, and output multiple <span class="monospaced">mlmon.out</span> files.</p></div> <div class="ulist"><ul> <li> <p> <span class="monospaced">isOn</span> </p> <div class="paragraph"><p>a compile-time constant that is false only when compiling <span class="monospaced">-profile no</span>.</p></div> </li> <li> <p> <span class="monospaced">type Data.t</span> </p> <div class="paragraph"><p>the type of a unit of profiling data. In order to most efficiently execute non-profiled programs, when compiling <span class="monospaced">-profile no</span> (the default), <span class="monospaced">Data.t</span> is equivalent to <span class="monospaced">unit ref</span>.</p></div> </li> <li> <p> <span class="monospaced">Data.equals (x, y)</span> </p> <div class="paragraph"><p>returns true if the <span class="monospaced">x</span> and <span class="monospaced">y</span> are the same unit of profiling data.</p></div> </li> <li> <p> <span class="monospaced">Data.free x</span> </p> <div class="paragraph"><p>frees the memory associated with the unit of profiling data <span class="monospaced">x</span>. It is an error to free the current unit of profiling data or to free a previously freed unit of profiling data. When compiling <span class="monospaced">-profile no</span>, <span class="monospaced">Data.free x</span> is a no-op.</p></div> </li> <li> <p> <span class="monospaced">Data.malloc ()</span> </p> <div class="paragraph"><p>returns a new unit of profiling data. Each unit of profiling data is allocated from the process address space (but is <em>not</em> in the MLton heap) and consumes memory proportional to the number of source functions. When compiling <span class="monospaced">-profile no</span>, <span class="monospaced">Data.malloc ()</span> is equivalent to allocating a new <span class="monospaced">unit ref</span>.</p></div> </li> <li> <p> <span class="monospaced">write (x, f)</span> </p> <div class="paragraph"><p>writes the accumulated ticks in the unit of profiling data <span class="monospaced">x</span> to file <span class="monospaced">f</span>. It is an error to write a previously freed unit of profiling data. When compiling <span class="monospaced">-profile no</span>, <span class="monospaced">write (x, f)</span> is a no-op. A profiled program will always write the current unit of profiling data at program exit to a file named <span class="monospaced">mlmon.out</span>.</p></div> </li> <li> <p> <span class="monospaced">withData (d, f)</span> </p> <div class="paragraph"><p>runs <span class="monospaced">f</span> with <span class="monospaced">d</span> as the unit of profiling data, and returns the result of <span class="monospaced">f</span> after restoring the current unit of profiling data. When compiling <span class="monospaced">-profile no</span>, <span class="monospaced">withData (d, f)</span> is equivalent to <span class="monospaced">f ()</span>.</p></div> </li> </ul></div> </div> </div> <div class="sect1"> <h2 id="_example">Example</h2> <div class="sectionbody"> <div class="paragraph"><p>Here is an example, taken from the <span class="monospaced">examples/profiling</span> directory, showing how to profile the executions of the <span class="monospaced">fib</span> and <span class="monospaced">tak</span> functions separately. Suppose that <span class="monospaced">fib-tak.sml</span> contains the following.</p></div> <div class="listingblock"> <div class="content"><div class="highlight"><pre><span class="k">structure</span><span class="w"> </span><span class="n">Profile</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">MLton</span><span class="p">.</span><span class="n">Profile</span><span class="w"></span> <span class="k">val</span><span class="w"> </span><span class="n">fibData</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">Profile</span><span class="p">.</span><span class="n">Data</span><span class="p">.</span><span class="n">malloc</span><span class="w"> </span><span class="p">()</span><span class="w"></span> <span class="k">val</span><span class="w"> </span><span class="n">takData</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">Profile</span><span class="p">.</span><span class="n">Data</span><span class="p">.</span><span class="n">malloc</span><span class="w"> </span><span class="p">()</span><span class="w"></span> <span class="k">fun</span><span class="w"> </span><span class="n">wrap</span><span class="w"> </span><span class="p">(</span><span class="n">f</span><span class="p">,</span><span class="w"> </span><span class="n">d</span><span class="p">)</span><span class="w"> </span><span class="n">x</span><span class="w"> </span><span class="p">=</span><span class="w"></span> <span class="w"> </span><span class="n">Profile</span><span class="p">.</span><span class="n">withData</span><span class="w"> </span><span class="p">(</span><span class="n">d</span><span class="p">,</span><span class="w"> </span><span class="k">fn</span><span class="w"> </span><span class="p">()</span><span class="w"> </span><span class="p">=></span><span class="w"> </span><span class="n">f</span><span class="w"> </span><span class="n">x</span><span class="p">)</span><span class="w"></span> <span class="k">val</span><span class="w"> </span><span class="k">rec</span><span class="w"> </span><span class="n">fib</span><span class="w"> </span><span class="p">=</span><span class="w"></span> <span class="w"> </span><span class="k">fn</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="p">=></span><span class="w"> </span><span class="mi">0</span><span class="w"></span> <span class="w"> </span><span class="p">|</span><span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="p">=></span><span class="w"> </span><span class="mi">1</span><span class="w"></span> <span class="w"> </span><span class="p">|</span><span class="w"> </span><span class="n">n</span><span class="w"> </span><span class="p">=></span><span class="w"> </span><span class="n">fib</span><span class="w"> </span><span class="p">(</span><span class="n">n</span><span class="w"> </span><span class="n">-</span><span class="w"> </span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="n">+</span><span class="w"> </span><span class="n">fib</span><span class="w"> </span><span class="p">(</span><span class="n">n</span><span class="w"> </span><span class="n">-</span><span class="w"> </span><span class="mi">2</span><span class="p">)</span><span class="w"></span> <span class="k">val</span><span class="w"> </span><span class="n">fib</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">wrap</span><span class="w"> </span><span class="p">(</span><span class="n">fib</span><span class="p">,</span><span class="w"> </span><span class="n">fibData</span><span class="p">)</span><span class="w"></span> <span class="k">fun</span><span class="w"> </span><span class="n">tak</span><span class="w"> </span><span class="p">(</span><span class="n">x</span><span class="p">,</span><span class="n">y</span><span class="p">,</span><span class="n">z</span><span class="p">)</span><span class="w"> </span><span class="p">=</span><span class="w"></span> <span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="n">not</span><span class="w"> </span><span class="p">(</span><span class="n">y</span><span class="w"> </span><span class="n"><</span><span class="w"> </span><span class="n">x</span><span class="p">)</span><span class="w"></span> <span class="w"> </span><span class="k">then</span><span class="w"> </span><span class="n">z</span><span class="w"></span> <span class="w"> </span><span class="k">else</span><span class="w"> </span><span class="n">tak</span><span class="w"> </span><span class="p">(</span><span class="n">tak</span><span class="w"> </span><span class="p">(</span><span class="n">x</span><span class="w"> </span><span class="n">-</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="n">y</span><span class="p">,</span><span class="w"> </span><span class="n">z</span><span class="p">),</span><span class="w"></span> <span class="w"> </span><span class="n">tak</span><span class="w"> </span><span class="p">(</span><span class="n">y</span><span class="w"> </span><span class="n">-</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="n">z</span><span class="p">,</span><span class="w"> </span><span class="n">x</span><span class="p">),</span><span class="w"></span> <span class="w"> </span><span class="n">tak</span><span class="w"> </span><span class="p">(</span><span class="n">z</span><span class="w"> </span><span class="n">-</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="n">x</span><span class="p">,</span><span class="w"> </span><span class="n">y</span><span class="p">))</span><span class="w"></span> <span class="k">val</span><span class="w"> </span><span class="n">tak</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">wrap</span><span class="w"> </span><span class="p">(</span><span class="n">tak</span><span class="p">,</span><span class="w"> </span><span class="n">takData</span><span class="p">)</span><span class="w"></span> <span class="k">val</span><span class="w"> </span><span class="k">rec</span><span class="w"> </span><span class="n">f</span><span class="w"> </span><span class="p">=</span><span class="w"></span> <span class="w"> </span><span class="k">fn</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="p">=></span><span class="w"> </span><span class="p">()</span><span class="w"></span> <span class="w"> </span><span class="p">|</span><span class="w"> </span><span class="n">n</span><span class="w"> </span><span class="p">=></span><span class="w"> </span><span class="p">(</span><span class="n">fib</span><span class="w"> </span><span class="mi">38</span><span class="p">;</span><span class="w"> </span><span class="n">f</span><span class="w"> </span><span class="p">(</span><span class="n">n-</span><span class="mi">1</span><span class="p">))</span><span class="w"></span> <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">f</span><span class="w"> </span><span class="mi">2</span><span class="w"></span> <span class="k">val</span><span class="w"> </span><span class="k">rec</span><span class="w"> </span><span class="n">g</span><span class="w"> </span><span class="p">=</span><span class="w"></span> <span class="w"> </span><span class="k">fn</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="p">=></span><span class="w"> </span><span class="p">()</span><span class="w"></span> <span class="w"> </span><span class="p">|</span><span class="w"> </span><span class="n">n</span><span class="w"> </span><span class="p">=></span><span class="w"> </span><span class="p">(</span><span class="n">tak</span><span class="w"> </span><span class="p">(</span><span class="mi">18</span><span class="p">,</span><span class="mi">12</span><span class="p">,</span><span class="mi">6</span><span class="p">);</span><span class="w"> </span><span class="n">g</span><span class="w"> </span><span class="p">(</span><span class="n">n-</span><span class="mi">1</span><span class="p">))</span><span class="w"></span> <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">g</span><span class="w"> </span><span class="mi">500</span><span class="w"></span> <span class="k">fun</span><span class="w"> </span><span class="n">done</span><span class="w"> </span><span class="p">(</span><span class="n">data</span><span class="p">,</span><span class="w"> </span><span class="n">file</span><span class="p">)</span><span class="w"> </span><span class="p">=</span><span class="w"></span> <span class="w"> </span><span class="p">(</span><span class="n">Profile</span><span class="p">.</span><span class="n">Data</span><span class="p">.</span><span class="n">write</span><span class="w"> </span><span class="p">(</span><span class="n">data</span><span class="p">,</span><span class="w"> </span><span class="n">file</span><span class="p">)</span><span class="w"></span> <span class="w"> </span><span class="p">;</span><span class="w"> </span><span class="n">Profile</span><span class="p">.</span><span class="n">Data</span><span class="p">.</span><span class="n">free</span><span class="w"> </span><span class="n">data</span><span class="p">)</span><span class="w"></span> <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">done</span><span class="w"> </span><span class="p">(</span><span class="n">fibData</span><span class="p">,</span><span class="w"> </span><span class="s">"mlmon.fib.out"</span><span class="p">)</span><span class="w"></span> <span class="k">val</span><span class="w"> </span><span class="p">_</span><span class="w"> </span><span class="p">=</span><span class="w"> </span><span class="n">done</span><span class="w"> </span><span class="p">(</span><span class="n">takData</span><span class="p">,</span><span class="w"> </span><span class="s">"mlmon.tak.out"</span><span class="p">)</span><span class="w"></span> </pre></div></div></div> <div class="paragraph"><p>Compile and run the program.</p></div> <div class="listingblock"> <div class="content monospaced"> <pre>% mlton -profile time fib-tak.sml % ./fib-tak</pre> </div></div> <div class="paragraph"><p>Separately display the profiling data for <span class="monospaced">fib</span></p></div> <div class="listingblock"> <div class="content monospaced"> <pre>% mlprof fib-tak mlmon.fib.out 5.77 seconds of CPU time (0.00 seconds GC) function cur --------- ----- fib 96.9% <unknown> 3.1%</pre> </div></div> <div class="paragraph"><p>and for <span class="monospaced">tak</span></p></div> <div class="listingblock"> <div class="content monospaced"> <pre>% mlprof fib-tak mlmon.tak.out 0.68 seconds of CPU time (0.00 seconds GC) function cur -------- ------ tak 100.0%</pre> </div></div> <div class="paragraph"><p>Combine the data for <span class="monospaced">fib</span> and <span class="monospaced">tak</span> by calling <span class="monospaced">mlprof</span> with multiple <span class="monospaced">mlmon.out</span> files.</p></div> <div class="listingblock"> <div class="content monospaced"> <pre>% mlprof fib-tak mlmon.fib.out mlmon.tak.out mlmon.out 6.45 seconds of CPU time (0.00 seconds GC) function cur --------- ----- fib 86.7% tak 10.5% <unknown> 2.8%</pre> </div></div> </div> </div> </div> <div id="footnotes"><hr></div> <div id="footer"> <div id="footer-text"> </div> <div id="footer-badges"> </div> </div> </body> </html>
distrib
>
Fedora
>
18
>
x86_64
>
media
>
updates
>
by-pkgid
>
171636fb720078ab07822dd4a76f1938
>
files
>
2428
