// tag::configure-test-task[]
testing {
    suites {
        integrationTest {
            targets {
                all { // <1>
                    testTask.configure {
                        maxHeapSize = '512m' // <2>
                    }
                }
            }
        }
    }
}

        given:
        buildFile << """
            apply plugin: 'java'
            ${mavenCentralRepository()}
            dependencies { testImplementation 'org.testng:testng:5.12.1' }
            test { useTestNG { suiteThreadPoolSize = 5 } }
        """

        file("src/test/java/SimpleTest.java") << """
            import org.testng.annotations.Test;

            public class SimpleTest {

performanceTest.registerTestProject("ktsManyProjects", KtsProjectGeneratorTask) {
    projects = 100
    sourceFiles = 0
    daemonMemory = '512m'
}

performanceTest.registerTestProject("ktsSmall", KtsProjectGeneratorTask) {
    daemonMemory = '512m'
}

// === Native Software Model ===
performanceTest.registerTestProject("smallNative", NativeProjectGeneratorTask) {
    projects = 1

// run to run. To avoid flakes, this test performs multiple
// experiments and only complains if all of them consistently fail.
func main() {
	// Sample at 16K instead of default 512K to exercise sampling more heavily.
	runtime.MemProfileRate = 16 * 1024

	if err := testInterleavedAllocations(); err != nil {
		panic(err.Error())
	}
	if err := testSmallAllocations(); err != nil {
		panic(err.Error())

    testImplementation("junit:junit:4.13")
    runtimeOnly("com.googlecode:reflectasm:1.01")
}

(tasks.getByName("test") as Test).apply {
    if (!JavaVersion.current().isJava8Compatible) {
        jvmArgs("-XX:MaxPermSize=512m")
    }
    jvmArgs("-XX:+HeapDumpOnOutOfMemoryError")
}

task<DependencyReportTask>("dependencyReport") {
    outputs.upToDateWhen { false }
    outputFile = File(buildDir, "dependencies.txt")

	check(mul(zero(), gen(4)), 0)
	check(mul(gen(3), add1(zero())), 3)
	check(mul(add1(zero()), gen(4)), 4)
	check(mul(gen(3), gen(4)), 12)

	check(fact(zero()), 1)
	check(fact(add1(zero())), 1)
	check(fact(gen(5)), 120)
}

// -------------------------------------
// Factorial

var results = [...]int{
	1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800,
	39916800, 479001600,
}

func main() {

            maxParallelForks = ${config.maxParallelForks}
            setForkEvery(testForkEvery.toLong())

            if (!JavaVersion.current().isJava8Compatible) {
                jvmArgs("-XX:MaxPermSize=512m")
            }
            jvmArgs("-XX:+HeapDumpOnOutOfMemoryError")
        }

        task<DependencyReportTask>("dependencyReport") {
            outputs.upToDateWhen { false }

     */
    public long getDefaultMaximumHeapSize(long osTotalMemory) {
        if (isIbmJvm()) {
            long totalMemoryHalf = osTotalMemory / 2;
            long halfGB = MemoryAmount.parseNotation("512m");
            return totalMemoryHalf > halfGB ? halfGB : totalMemoryHalf;
        }

        long totalMemoryFourth = osTotalMemory / 4;
        long oneGB = MemoryAmount.parseNotation("1g");

			`{
				"policyName":"static",
				"machineState":{"0":{"numberOfAssignments":0,"memoryMap":{"memory":{"total":2048,"systemReserved":512,"allocatable":1536,"reserved":512,"free":1024}},"cells":[]}},
				"entries":{"pod":{"container1":[{"numaAffinity":[0],"type":"memory","size":512}]}},
				"checksum": 4215593881
			}`,
			"",
			&stateMemory{
				assignments: ContainerMemoryAssignments{
					"pod": map[string][]Block{

----

To increase the limit to e.g. 512K watches run the following:

[source,bash]
----
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf
----
[source,bash]
----
sudo sysctl -p --system
----

Each used inotify watch takes up to 1KB of memory.
Assuming inotify uses all the 512K watches then file system watching could use up to 500MB.