The following comment is incorrect after JDK-8338977 -- the EC part will occupy the rest of the young-gen (NGC), therefore, the relation is strict equality. The if-part can be removed.

```
// Verify relative size of NGC and S0C + S1C + EC.
// The rule depends on if the tenured GC is parallel or not.
// For parallell GC: NGC >= S0C + S1C + EC
// For non-parallell GC: NGC == S0C + S1C + EC
boolean isTenuredParallelGC = isTenuredParallelGC();
String errMsg = String.format(
        "NGC %s (S0C + S1C + EC) (NGC = %.1f, S0C = %.1f, S1C = %.1f, EC = %.1f, (S0C + S1C + EC) = %.1f)",
        isTenuredParallelGC ? "<" : "!=", NGC, S0C, S1C, EC, S0C + S1C + EC);
if (isTenuredParallelGC) {
    assertThat(NGC >= S0C + S1C + EC, errMsg);
} else {
    assertThat(checkFloatIsSum(NGC, S0C, S1C, EC), errMsg);
}
```