SoftDev Warmup Experiment
This is the main repository for the Software Development Team Warmup Experiment as detailed in the paper "Virtual Machine Warmup Blows Hot and Cold", by Edd Barrett, Carl Friedrich Bolz, Rebecca Killick, Sarah Mount and Laurence Tratt.
The paper is available here
Running the warmup experiment
build.sh will fetch and build the VMs and the Krun benchmarking
system. Once the VMs are built the
Makefile contains a target
bench-with-reboots which will run the experiment in full, however, you should
consult the Krun documentation (fetched into
build.sh), as there
is a great deal of manual intervention needed to compile a tickless kernel,
disable Intel P-states, set up
Note that the experiment is designed to run on amd64 machines running Debian 8 or OpenBSD. Newer versions of Debian do not currently work due to a C++ ABI bump which would require a newer C++ compiler (a newer GCC or perhaps clang).
build.sh will also install our
warmup_stats code, which includes
a number of scripts to format benchmark results as plots or tables (similar to
those seen in the paper), and diff between results files.
warmup_stats has a
number of dependencies, some of which are also needed by the code in this
repository, in particular:
- Python 2.7 - the code here is not Python 3.x ready
- bzip2 / bunzip2 and bzip2 (including header files)
- curl (including header files)
- gcc and make
- liblzma library (including header files)
- Python modules: numpy, pip, libcap
- openssl (including header files)
- pcre library (including header files)
- readline (including header files)
The install instructions for
warmup_stats contain more details.
The paper mentions that to ensure benchmarks are "AST deterministic", we
instrumented them with print statements. These versions can be found alongside
the "proper" benchmarks under the
For example under
bench.luais the un-instrumented benchmark used in the proper experiment.
trace_bench.luais the instrumented version.
- Java benchmarks have and additional
trace_KrunEntry.javafile as well.
- Since we cannot distribute Java Richards, a patch is required to derive the
tracing version (