a-foundation-benchmark/src/main/java/com/ajjpj/afoundation/concurrent/jdk/j9new/ForkJoinPool.java
static WorkQueue commonSubmitterQueue() {
        ForkJoinPool p = common;
        int r = ThreadLocalRandomHelper.getProbe();
        WorkQueue[] ws; int m;
        return (p != null && (ws = p.workQueues) != null &&
                (m = ws.length - 1) >= 0) ?
            ws[m & r & SQMASK] : null;
    }
static WorkQueue commonSubmitterQueue() {
        ForkJoinPool p = common;
        int r = ThreadLocalRandomHelper.getProbe();
        WorkQueue[] ws; int m;
        return (p != null && (ws = p.workQueues) != null &&
                (m = ws.length - 1) >= 0) ?
            ws[m & r & SQMASK] : null;
    }
Returns common pool queue for an external thread.