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 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
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 * The above copyright notice and this permission notice shall be included in all
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package org.opendc.experiments.capelin

import org.opendc.compute.service.ComputeService
import org.opendc.compute.service.scheduler.FilterScheduler
import org.opendc.compute.service.scheduler.filters.ComputeFilter
import org.opendc.compute.service.scheduler.filters.RamFilter
import org.opendc.compute.service.scheduler.filters.VCpuFilter
import org.opendc.compute.service.scheduler.weights.CoreRamWeigher
import org.opendc.experiments.capelin.topology.clusterTopology
import org.opendc.experiments.compute.ComputeWorkloadLoader
import org.opendc.experiments.compute.VirtualMachine
import org.opendc.experiments.compute.replay
import org.opendc.experiments.compute.setupComputeService
import org.opendc.experiments.compute.setupHosts
import org.opendc.experiments.compute.topology.HostSpec
import org.opendc.experiments.compute.trace
import org.opendc.common.experiments.provisioner.Provisioner
import org.opendc.simulator.kotlin.runSimulation
import org.openjdk.jmh.annotations.Benchmark
import org.openjdk.jmh.annotations.Fork
import org.openjdk.jmh.annotations.Measurement
import org.openjdk.jmh.annotations.Param
import org.openjdk.jmh.annotations.Scope
import org.openjdk.jmh.annotations.Setup
import org.openjdk.jmh.annotations.State
import org.openjdk.jmh.annotations.Warmup
import java.io.File
import java.util.Random
import java.util.concurrent.TimeUnit

/**
 * Benchmark suite for the Capelin experiments.
 */
@State(Scope.Thread)
@Fork(1)
@Warmup(iterations = 2, time = 5, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 5, time = 5, timeUnit = TimeUnit.SECONDS)
class CapelinBenchmarks {
    private lateinit var vms: List<VirtualMachine>
    private lateinit var topology: List<HostSpec>

    @Param("true", "false")
    private var isOptimized: Boolean = false

    @Setup
    fun setUp() {
        val loader = ComputeWorkloadLoader(File("src/test/resources/trace"))
        vms = trace("bitbrains-small").resolve(loader, Random(1L))
        topology = checkNotNull(object {}.javaClass.getResourceAsStream("/topology.txt")).use { clusterTopology(it) }
    }

    @Benchmark
    fun benchmarkCapelin() = runSimulation {
        val serviceDomain = "compute.opendc.org"

        Provisioner(dispatcher, seed = 0).use { provisioner ->
            val computeScheduler = FilterScheduler(
                filters = listOf(ComputeFilter(), VCpuFilter(16.0), RamFilter(1.0)),
                weighers = listOf(CoreRamWeigher(multiplier = 1.0))
            )

            provisioner.runSteps(
                setupComputeService(serviceDomain, { computeScheduler }),
                setupHosts(serviceDomain, topology, optimize = isOptimized)
            )

            val service = provisioner.registry.resolve(serviceDomain, ComputeService::class.java)!!
            service.replay(timeSource, vms, 0L, interference = true)
        }
    }
}