>From ChangeLog:
- "Kevin P. Lawton" <[EMAIL PROTECTED]>: Wed Jan 10 17:24:18 EST 2001
Moved previous files in dt-testbed to dt-testbed/proto0.
Created new dir dt-testbed/proto1. Check out README in that dir.
-Kevin
=======================================================================
>From the td-testbed/proto1/README file:
This is another testbed for prototyping the lightweight dynamic translation
scheme in plex86.
You can tweak parameters in the top of 'dt.h' before compiling.
I will be adding more parameters and modeling to this code over time.
Then just type 'make'.
Guest code is actually generated in 'guest.c'. I will also
be adding different kinds of guest code sequences to that file.
The first rev of this guest code exercises static out-of-page
branches in nearly the worst possible scenario. I generate
code which weaves a path branching back and forth between two
arbitrary guest pages. At the end, based on 'DT_LOOP_COUNT' this
process is repeated.
I did this purposely to magnify the overhead imposed by the branch
handling shims and code as much as possible, so that we can work
on trimming them down by trying various techniques. This is not
anywhere near realistic for code, but it's useful for development.
Some results thus far, based on the command 'time ./dt' are below.
Once this is trimmed down, I may model some more realistic guest
code. The generated code and branch handler in this first effort,
is horribly inefficient currently. I'll enhance that soon.
Wed Jan 10 17:04:06 EST 2001:
Native DT Slowdown factor
0.72 user 54.68 user 76:1
