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* Updated all package versions including kotlin. Updated all web-server tests to run.
* Changed the java version of the tests. OpenDC now only supports java 19.
* small update
* test update
* new update
* updated docker version to 19
* updated docker version to 19
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* Updated metrics and parquet output
* fixed typos
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* made sure all tests run
* fixed typo
* executed spotlessApply
* added back web-server tests
* updated SimTraceWorkloadTest
* commented CapelinRunneer and GreenifierRunner tests
* commented one SimTraceWorkloadTest
* altered codecov execution
* changed codecov
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This change replaces the use of `CoroutineContext` for passing the
`SimulationDispatcher` across the different modules of OpenDC by the
lightweight `Dispatcher` interface of the OpenDC common module.
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This change updates the `SimulationScheduler` class to implement the
`Dispatcher` interface from the OpenDC Common module, so that OpenDC
modules only need to depend on the common module for dispatching future
task (possibly in simulation).
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This change updates the modules of OpenDC to always accept
the `InstantSource` interface as source of time. Previously we used
`java.time.Clock`, but this class is bound to a time zone which does not
make sense for our use-cases.
Since `java.time.Clock` implements `java.time.InstantSource`, it can be
used in places that require an `InstantSource` as parameter. Conversion
from `InstantSource` to `Clock` is also possible by invoking
`InstantSource#withZone`.
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This change updates the interface of `SimWorkload` to support
snapshotting workloads. We introduce a new method `snapshot()` to this
interface which returns a new `SimWorkload` that can be started at a
later point in time and on another `SimMachine`, which continues
progress from the moment the workload was snapshotted.
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This change re-implements the OpenDC compute simulator framework using
the new flow2 framework for modelling multi-edge flow networks. The
re-implementation is written in Java and focusses on performance and
clean API surface.
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This change updates the build configuration to use Spotless for code
formating of both Kotlin and Java.
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This change updates the repository to remove the use of wildcard imports
everywhere. Wildcard imports are not allowed by default by Ktlint as
well as Google's Java style guide.
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This change renames the method `runBlockingSimulation` to
`runSimulation` to put more emphasis on the simulation part of the
method. The blocking part is not that important, but this behavior is
still described in the method documentation.
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This change updates the implementation of `SimulationDispatcher` to use
a (possibly user-provided) `SimulationScheduler` for managing the
execution of the simulation and future tasks.
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This change fixes an issue in the `SimBareMetalMachine` implementation
where the power usage was only updated after a non-zero duration. However,
this would mean that OpenDC would possibly report incorrect power usage
values when multiple convergence calls occured at the same timestamp.
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This change updates the implementation of SimTFDevice to directly use
the metrics provided by the `SimBareMetalMachine` class, instead of
computing these metrics itself.
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This change removes the `TensorFlowExperiment` in favour of an
integration test that can be run during CI invocations. Given that the
experiment was not very sophisticated (in terms of data collection), we
believe it is better suited as an integration test.
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This change fixes an issue with the `SimTFDevice` implementation where
very small amounts of FLOPs would cause the device to enter an infinite
loop. We now round the value up to ensure that the device always
consumes FLOPs.
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This change removes the OpenTelemetry integration from the OpenDC
Tensorflow 2020 experiments. Previously, we chose to integrate
OpenTelemetry to provide a unified way to report metrics to the users.
See the previous commit removing it from the "Compute" modules for the
reasoning behind this change.
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This change updates the `TFDevice` interface to directly expose
statistics about the accelerator device to the user. Previously, the
user had to access these values through OpenTelemetry, which required
substantial extra work.
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This change removes the delta parameter from the callbacks of the flow
framework. This parameter was used to indicate the duration in time
between the last call and the current call. However, its usefulness was
limited since the actual delta values needed by implementors of this
method had to be bridged across different flow callbacks.
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This change removes the opendc-platform module from the project. This
module represented a Java platform which was previously used for sharing
a set of dependency versions between subprojects. However, with the
version catalogue that was added by Gradle, we currently do not use the
platform anymore.
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This change updates the TimerScheduler implementation to directly use
the Delay object instead of running the timers inside a coroutine.
Constructing the coroutine is more expensive, so we prefer running in a
Runnable.
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This change adds a new module, opendc-common, that contains
functionality that is shared across OpenDC's modules.
We move the existing utils module into this new module.
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This change updates the OpenDC codebase to use OpenTelemetry v1.11,
which stabilizes the metrics API. This stabilization brings quite a few
breaking changes, so significant changes are necessary inside the OpenDC
codebase.
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This change updates the SimMachine interface to drop the coroutine
requirement for running a workload on a machines. Users can now
asynchronously start a workload and receive notifications via the
workload callbacks.
Users still have the possibility to suspend execution during workload
execution by using the new `runWorkload` method, which is implemented on
top of the new `startWorkload` primitive.
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This change adds two new properties for controlling whether the
convergence callbacks of the source and consumer respectively should be
invoked. This saves a lot of unnecessary calls for stages that do not
have any implementation of the `onConvergence` method.
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This change creates separate callbacks for the remaining events:
onStart, onStop and onConverge.
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This change removes the Capacity entry from FlowEvent. Since the source
is always pulled on a capacity change, we do not need a separate event
for this.
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This change renames the `opendc-simulator-resources` module into the
`opendc-simulator-flow` module to indicate that the core simulation
model of OpenDC is based around modelling and simulating flows.
Previously, the distinction between resource consumer and provider, and
input and output caused some confusion. By switching to a flow-based
model, this distinction is now clear (as in, the water flows from source
to consumer/sink).
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This change adds a new method to `SimResourceContext` called `push`
which allows users to change the requested flow rate directly without
having to interrupt the consumer.
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This change removes the work and deadline properties from the
SimResourceCommand.Consume class and introduces a new property duration.
This property is now used in conjunction with the limit to compute the amount
of work processed by a resource provider.
Previously, we used both work and deadline to compute the duration and
the amount of remaining work at the end of a consumption. However, with
this change, we ensure that a resource consumption always runs at the
same speed once establishing, drastically simplifying the computation
for the amount of work processed during the consumption.
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This change removes the environment reader from the format library since
they are highly specific for the particular experiment. In the future,
we hope to have a single format to setup the entire datacenter (perhaps
similar to the format used by the web runner).
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This change upgrades the OpenTelemetry dependency to version 1.5, which
contains various breaking changes in the metrics API.
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This change re-organizes the classes of the compute simulator module to
make a clearer distinction between the hardware, firmware and software
interfaces in this module.
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This change integrates the power subsystem of the simulator with the
compute subsystem by exposing a new field on a SimBareMetalMachine, psu,
which provides access to the machine's PSU, which in turn can be
connected to a SimPowerOutlet.
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This change eliminates all Hadoop dependencies that are not necessary
for Parquet to work correctly. As a result, the number of dependencies
should now be greatly reduced, which in turn leads to less artifacts
that need to be retrieved at build time.
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This change splits the functionality present in the CPUFreq subsystem of
the compute simulation. Currently, the DVFS functionality is embedded in
SimBareMetalMachine. However, this functionality should not exist within
the firmware layer of a machine. Instead, the operating system should
perform this logic (in OpenDC this should be the hypervisor).
Furthermore, this change moves the scaling driver into the power
package. The power driver is a machine/firmware specific implementation
that computes the power consumption of a machine.
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This change updates the SimWorkload interfaces to allow
implementations to start consumers for the machine resource providers
directly.
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This change introduces the SimResourceInterpreter which centralizes the
logic for scheduling and interpreting the communication between resource
consumer and provider.
This approach offers better performance due to avoiding invalidating the
state of the resource context when not necessary. Benchmarks show in the
best case a 5x performance improvement and at worst a 2x improvement.
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This change addresses the deprecations that were caused by the migration
to Kotlin 1.5.
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This change adds the experimental environments that are being used for
the TensorFlow on OpenDC experiments.
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This change adds a reader for the environment/topology format that is
used for the TensorFlow experiments in OpenDC.
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This change adds a model of TensorFlow's Keras API to OpenDC.
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This change adds the initial experiment setup for the TensorFlow
on OpenDC experiments.
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