The trick in checking CPU capability is to demand a high bit value with a short expiration.
校验CPU能力的方法是，要求在短期间内得到高比特值。
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Vega processors included a custom read barrier instruction that included bit field checking in reference metadata as well as special virtual memory protection for GC-compacted pages.
This is a bit like the process of quality management, an internal checking of the organisation's standards to see if there is further potential to cut waste and improve efficiency.