def sort_latency_keys(latency):
    """The FIO latency data has latency buckets and those are sorted ascending.
    The milisecond data has a >=2000 bucket which cannot be sorted in a 'normal'
    way, so it is just stuck on top. This function resturns a list of sorted keys.
    """
    placeholder = ""
    tmp = []
    for item in latency:
        if item == ">=2000":
            placeholder = ">=2000"
        else:
            tmp.append(item)

    tmp.sort(key=int)
    if placeholder:
        tmp.append(placeholder)
    return tmp