[pypy-commit] extradoc extradoc: more slides

[ctismer]

Author: Christian Tismer  <tismer at stackless.com>
Branch: extradoc
Changeset: r4276:91e364476104
Date: 2012-07-04 12:52 +0200
http://bitbucket.org/pypy/extradoc/changeset/91e364476104/

Log:	more slides

diff --git a/talk/ep2012/stackless/slp-talk.pdf b/talk/ep2012/stackless/slp-talk.pdf
index 9fb9ee187cbe163efeff894590fd0fe4d4c040f6..afcb8c00b73bb83d114dc4e0d9c8ec1157800ef3
GIT binary patch

[cut]

diff --git a/talk/ep2012/stackless/slp-talk.rst b/talk/ep2012/stackless/slp-talk.rst
--- a/talk/ep2012/stackless/slp-talk.rst
+++ b/talk/ep2012/stackless/slp-talk.rst
@@ -239,6 +239,54 @@
 * but the main difference is ...
 
 
+Excurs: Hard-Switching
+-----------------------
+
+Sorry ;-)
+
+Switching program state "the hard way":
+
+Without notice of the interpreter
+
+* the machine stack gets hijacked
+
+  - Brute-Force: replace the stack with another one
+  
+  - like threads
+  
+* stackless, greenlets
+
+  - stack slicing
+  
+  - semantically same effect
+  
+* switching works fine
+
+* pickling does not work, opaque data on the stack
+
+  - this is more sophisticated in PyPy, another story...
+
+
+Excurs: Soft-Switching
+-----------------------
+
+Switching program state "the soft way":
+
+With knowledge of the interpreter
+
+* most efficient implementation in Stackless 3.1
+
+* demands the most effort of the developers
+
+* no opaque data on the stack, pickling does work
+
+  - again, this is more sophisticated in PyPy
+
+|pause|
+
+* now we are at the main difference, as you guessed ...
+
+
 Pickling Program State
 -----------------------
 
@@ -430,6 +478,7 @@
 
   - without doing any extra-work
 
+
 Software archeology
 -------------------