mtlpypracticetalk

jvns · Apr 6, 2015 · 3752440 · 3752440
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diff --git a/2015-03-mtlpypracticetalk/pageHeader2.png b/2015-03-mtlpypracticetalk/pageHeader2.png
diff --git a/2015-03-mtlpypracticetalk/python-logo-light.png b/2015-03-mtlpypracticetalk/python-logo-light.png
diff --git a/2015-03-mtlpypracticetalk/slides.md b/2015-03-mtlpypracticetalk/slides.md
@@ -1,17 +1,19 @@
-# Spying on your programs with strace
+# spying on your programs
 
 by Julia Evans <br>
-[`twitter.com/b0rk`][twitter]  <br>
-[`github.com/jvns`][github]  <br>
-[`jvns.ca`][website]  <br>
+
+* twitter: @b0rk <br>
+* blog: jvns.ca
 
 [github]: https://github.com/jvns
 [twitter]:  https://twitter.com/b0rk
 [website]: http://jvns.ca
 
 # 
 
-<img src="python-logo.png">
+<img src="python-logo-light.png">
+
+# your program <br> = <br> black box
 
 # Debugging:
 
@@ -87,9 +89,9 @@ access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
 
 # open
 
-```
+<pre class="big">
 strace -etrace=open google-chrome
-```
+</pre>
 <img src="consent-to-send-stats.png">
 
 # open
@@ -148,14 +150,66 @@ NULL, NULL) = 512
 
 + spy on log files!
 
-# Thanks!
+# Chapter 2: <br> The Case of the <br> Slow Program
+
+# 3 Slow programs
+
+1. CPU time
+1. too many writes
+1. waiting for a slow server
+
+# Mystery program #1
+
+
+# 
+
+<pre class="big">
+$ time python mystery_1.py
+0.09user 0.01system 0:02.11elapsed 5%CPU 
+</pre>
+
+# wchan: wait channel
+
+# demo demo
+
+# sk_wait_data
+
+Wait for some data on a network socket.
+
+# We win! It was the network
 
-* strace all the things!
-* on OS X / Windows, try **sysdig**
-* Notes: [http://bit.ly/strace-notes](http://bit.ly/strace-notes)
+# Mystery program #2
+
+```
+$ time python mystery_2.py
+2.74user 0.00system 0:02.74elapsed 99%CPU 
+```
+
+# Use a python profiler
+
+# Mystery program #3
+
+# (really a mystery)
+
+# 
+
+```
+time python mystery_3.py 
+0.08user 1.03system 0:10.61elapsed 10%CPU
+```
+
+# demo demo
+
+# we win
+
+# your program <br> = <br> black box
+
+# learn your operating system
+
+# Thanks!
 
-[`twitter.com/b0rk`][twitter]  <br>
-[`jvns.ca`][website]  <br>
+* twitter: @b0rk <br>
+* blog: jvns.ca
 
 [twitter]:  https://twitter.com/b0rk
 [website]: http://jvns.ca

diff --git a/2015-03-mtlpypracticetalk/template.revealjs b/2015-03-mtlpypracticetalk/template.revealjs
@@ -2,9 +2,9 @@
 <html lang="en">    
 <head>
     <meta charset="utf-8">
-    <title>Machine learning: the boring parts</title>
+    <title>debugging python without python</title>
     <link rel="stylesheet" href="reveal_js/css/reveal.min.css">
-    <link rel="stylesheet" href="reveal_js/css/theme/moon.css" id="theme">
+    <link rel="stylesheet" href="reveal_js/css/theme/solarized.css" id="theme">
     <!-- If the query includes 'print-pdf', use the PDF print sheet -->
     <script>
         document.write( '<link rel="stylesheet" href="reveal_js/css/print/' + ( window.location.search.match( /print-pdf/gi ) ? 'pdf' : 'paper' ) + '.css" type="text/css" media="print">' );
@@ -27,15 +27,16 @@
 
         .reveal pre.big {
             font-family: andale mono;
-            font-size: 1.7em;
+            font-size: 1.4em;
             line-height: 1.2em;
+            width: 1000px;
         }
 
-        /*.reveal pre code {
-        //    font-family: andale mono;
-        //    font-size: 1.7em;
-        //    line-height: 1.2em;
-        //}*/
+        .reveal pre code {
+           font-family: andale mono;
+            font-size: 1.3em;
+            line-height: 1.2em;
+        }
 
         .reveal pre b {
             color: yellow;