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Diffstat (limited to 'opendc-harness/src/main/kotlin/org/opendc/harness/engine/ExperimentEngine.kt')
| -rw-r--r-- | opendc-harness/src/main/kotlin/org/opendc/harness/engine/ExperimentEngine.kt | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/opendc-harness/src/main/kotlin/org/opendc/harness/engine/ExperimentEngine.kt b/opendc-harness/src/main/kotlin/org/opendc/harness/engine/ExperimentEngine.kt new file mode 100644 index 00000000..a36f1f9b --- /dev/null +++ b/opendc-harness/src/main/kotlin/org/opendc/harness/engine/ExperimentEngine.kt @@ -0,0 +1,104 @@ +/* + * Copyright (c) 2021 AtLarge Research + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +package org.opendc.harness.engine + +import kotlinx.coroutines.* +import kotlinx.coroutines.flow.asFlow +import kotlinx.coroutines.flow.buffer +import kotlinx.coroutines.flow.collect +import kotlinx.coroutines.flow.map +import org.opendc.harness.api.ExperimentDefinition +import org.opendc.harness.api.Trial +import org.opendc.harness.engine.scheduler.ExperimentScheduler +import org.opendc.harness.engine.strategy.ExperimentStrategy + +/** + * The [ExperimentEngine] orchestrates the execution of experiments. + * + * @property strategy The [ExperimentStrategy] used to explore the experiment design space. + * @property scheduler The [ExperimentScheduler] to schedule the trials over compute resources. + * @property listener The [ExperimentExecutionListener] to observe the progress. + * @property repeats The number of repeats to perform. + */ +public class ExperimentEngine( + private val strategy: ExperimentStrategy, + private val scheduler: ExperimentScheduler, + private val listener: ExperimentExecutionListener, + private val repeats: Int +) { + /** + * Execute the specified [experiment][root]. + * + * @param root The experiment to execute. + */ + public suspend fun execute(root: ExperimentDefinition) { + listener.experimentStarted(root) + + try { + supervisorScope { + strategy.generate(root) + .asFlow() + .map { scenario -> + listener.scenarioStarted(scenario) + scenario + } + .buffer(100) + .collect { scenario -> + launch { + val jobs = (0 until repeats).map { repeat -> + val worker = scheduler.allocate() + launch { + val trial = Trial(scenario, repeat) + try { + listener.trialStarted(trial) + worker.dispatch(trial) + listener.trialFinished(trial, null) + } catch (e: Throwable) { + listener.trialFinished(trial, e) + throw e + } + } + } + + try { + jobs.joinAll() + listener.scenarioFinished(scenario, null) + } catch (e: CancellationException) { + listener.scenarioFinished(scenario, null) + throw e + } catch (e: Throwable) { + listener.scenarioFinished(scenario, e) + } + } + } + } + + listener.experimentFinished(root, null) + } catch (e: Throwable) { + listener.experimentFinished(root, e) + throw e + } + } + + override fun toString(): String = "ExperimentEngine" +} |
