# HG changeset patch
# User Me
# Date 1284219415 25200
# Node ID ce720506491bf4703b4bedb4b311fb88b27c194b
# Parent  e3b78148e9def2e1025aa94584fa9f42823a0010
cleared out old, out-of-sync, design notes

diff -r e3b78148e9de -r ce720506491b DESIGN_NOTES.txt
--- a/DESIGN_NOTES.txt	Sat Sep 11 07:40:44 2010 -0700
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,40 +0,0 @@
-
-This project is for a paper -- the goal is to implement and measure the
- performance of the Virtual Master-Slave system as an alternative to the
- Thread model.
-
-Going to implement exactly one application -- a do-nothing benchmark kernel
- that just measures scheduling overhead.
-
-Implement VMS this way:
-
-function to give to PThread that does the loop:
-
-get from queue, call function-ptr, passing it work-unit ptr (which contains a
- pointer to data declared as void * in the application), then write the
- "Done" flag and repeat.
-
-
-In an application:
-
-divide work up into pieces self, just make it a busy-wait loop that writes
- data, then reads it back, declared volatile.  At end of work, call fn that
- makes a continuation and notifies the Master its there, then return.
-
-
-Master:
-
-A loop that polls each virtual slave exactly once, processing each whose
- Done flag is set, it forces work-units to be one-to-one with slaves, so
- as soon as done polling slaves, it makes a continuation of itself, puts
- half the scheduled slaves in, clears its own Done flag, puts its
- continuation in, the other half of the scheduled slaves, then writes its
- own Done flag.
-
-When continuation first runs, checks if own Done flag set -- if not, busy-
- waits until set, then proceeds.  This ensures it doesn't overlap with
- tail-end of previous -- IE, continuation may sneak through queue before
- previous done putting second half of scheduled slaves in.  This is the only
- race condition.
-
-
diff -r e3b78148e9de -r ce720506491b DESIGN_NOTES__VMS.txt
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DESIGN_NOTES__VMS.txt	Sat Sep 11 08:36:55 2010 -0700
@@ -0,0 +1,2 @@
+
+Implement VMS this way: