Hi!
CoMeT: CoMeT is next-generation open-source EDA toolchain for integrated core-memory interval thermal simulations of 2D, 2.5, and 3D multi-/many-core processors. CoMeT (partially) subsumes the code of HotSniper.
An EDA toolchain for interval thermal simulations of 2D multi-/many-cores in an open system.
Details of HotSniper can be found in our ESL 2018 paper, and please consider citing this paper in your work if you find this tool useful in your research.
Pathania, Anuj, and Jörg Henkel. "HotSniper: Sniper-Based Toolchain for Many-Core Thermal Simulations in Open Systems." IEEE Embedded Systems Letters 11.2 (2018): 54-57.
Please refer to Hot Sniper User Manual to learn how to write custom scheduling policies that perform thermal-aware Dynamic Voltage Frequency Scaling (DVFS), Task Mapping, and Task Migration.
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HotSniper compiles and runs inside a Docker container. Therefore, you need to download & install Docker. For more info: https://docs.docker.com/engine/install/ubuntu/
After installing Docker, make sure you are able to run it without needing sudo by following instructions here - https://docs.docker.com/engine/install/linux-postinstall/
Extract Pinplay 3.2 to the root HotSniper directory as pin_kit
tar xf pinplay-drdebug-3.2-pin-3.2-81205-gcc-linux.tar.gz
mv pinplay-drdebug-3.2-pin-3.2-81205-gcc-linux pin_kit
At this stage, the root HotSniper directory has a folder named pin_kit
containing the PinPlay-3.2 library and a folder named hotspot
containing the HotSpot simulator. Since you now have Docker installed, let's create a container
using the shipped Dockerfile
.
cd docker
sudo apt install make
make
make run
Now that we are inside our container, we can build HotSniper and its requirements:
cd ..
The [HotSpot] simulator is shipped with HotSniper. All you need to do is to compile it:
cd hotspot
make
cd ..
make
Run inside container:
#setting $GRAPHITE_ROOT to HotSniper's root directory
export GRAPHITE_ROOT=$(pwd)
cd benchmarks
#setting $BENCHMARKS_ROOT to the benchmarks directory
export BENCHMARKS_ROOT=$(pwd)
#compiling the benchmarks
make
cd ..
HotSniper is shipped with a simulationcontrol
script that you can use to run batch simulations.
Run inside container:
cd simulationcontrol
PYTHONIOENCODING="UTF-8" python3 run.py
The path of the results' directory can be set inside the simulationcontrol/config.py
file.
Quickly list the finished simulations:
cd simulationcontrol
PYTHONIOENCODING="UTF-8" python3 parse_results.py
Each run is stored in a separate directory in the results directory (see 4). For quick visual check, many plots are automatically generated for you (IPS, power, etc).
To do your own (automated) evaluations, see the simulationcontrol.resultlib
package for a set of helper functions to parse the results. See the source code of parse_results.py
for a few examples.
- select technology node (22nm or larger)
config/base.cfg
:power/technology_node
- V/f-levels
- check
scripts/energystats.py
:build_dvfs_table
(keep in mind that V/f-levels are specified at 22nm)
- check
- select high-level architecture
simulationcontrol/config.py
:SNIPER_CONFIG
andNUMBER_CORES
- set architectural parameters
config/base.cfg
and other config files as specified in the previous step
- set scheduling and DVFS parameters
config/base.cfg
:scheduler/open/*
andscheduler/open/dvfs/*
- set
perf_model/core/frequency
- start trial run to extract estimations from McPAT
- start a simulation based on
simulationcontrol/run.py
:test_static_power
, kill it after ~5ms simulated time - extract static power at low/high V/f levels from the command line output: take power of last / second-to-last core
- extract area of a core from
benchmarks/energystats-temp.txt
: take processor area (including L3 cache etc.), divide by number of cores, and scale it to your technology node. If file is empty, start simulation again, kill it, and check again.
- start a simulation based on
- configure static power consumption
config/base.cfg
:power/*
inactive_power
must be set to static power consumption at min V/f level
- specify the floorplan with the
floorplan
parameter, the corresponding the thermal model with thehotspot_config
parameter and other thermal settings inconfig
config/base.cfg
:periodic_thermal
tdp
is defined by the floorplan, temperature limits and cooling parameters.- make sure that the
perf_model/cache/levels
is set to 3 if the floorplan has a L3 cache and it set to 2 if it does not. - The
hotspot
directory contains floorplans and corresponding hotspot configurations for a four core, a sixteen core and a sixty-four core gainestown processor.
- To create a new floorplan use the
create
script from thefloorplanlib
directory. For example to create a sixteen core gainestown floorplan run this command outside the docker environment:./create.py --cores 4x4 --subcore-template gainestown_core.flp --out gainestown_4x4
- Copy the generated floorplan
gainestown_4x4.flp
and the hotspot config filegainestown_4x4.hotspot_config
from the generatedgainestown_4x4
directory to thehotspot
directory. And then set the configuration parametersfloorplan
andhotspot_config
inbase.cfg
to point to these new floorplan and hotspot configuration files. - When you change the number of cores you will also need to update the
NUMBER_CORES
as was mentioned above. - For larger floorplans we recommend changing the
-model_type
togrid
in the hotspot configuration file to speed the thermals calculation.
- To get track the wearout of the components enable the reliability modeling in the
reliability
section. - create your scenarios
simulationcontrol/run.py
(e.g., similar todef example
)
- set your output folder for traces
simulationcontrol/config.py
:RESULTS_FOLDER
- This folder usually is outside of the HotSniper folder because we don't want to commit results (large files) to the simulator repo.
- verify all configurations in
sim.cfg
of a finished run
HotSniper supports program performance monitoring using the Heartbeat Framework. Several PARSEC programs are supported out of the box, which are: blackscholes, bodytrack, canneal, dedup, fluidanimate, streamcluster, swaptions and x264.
Enabling heartbeat functionality:
- Set
simulationcontrol/config.py::ENABLE_HEARTBEATS
variable toTrue
- Add the "hb_enabled" string to the
base_configuration
argument ofsimulationcontrol/run.py::run()
function call.
The "simulationcontrol/run.py::run_multi()" function serves as a template for the second step.
With these two parameters set, the simulation will start with Heartbeat functionality enabled, resulting in the collection of heartbeat data files for each program, identified by the program app ids. A simulation running one program will result in the "0.hb.log" file, accompanied with the "0.hb.png" and "0.hb.histogram.png" visualizations.
UnicodeEncodeError: 'ascii' codec can't encode character '\xb0' in position 61: ordinal not in range(128)
export PYTHONIOENCODING="UTF-8"
Sniper: http://snipersim.org
McPat: https://www.hpl.hp.com/research/mcpat/
HotSpot: http://lava.cs.virginia.edu/HotSpot/
HeartBeats: "https://github.com/libheartbeats/heartbeats"