7、DataWorks高效的数据集成
Secret Sauce #1: Two-Level Routing。关于这个话题，Line官方版本下载提供了深入分析
const dropOld = Stream.push({ highWaterMark: 2, backpressure: 'drop-oldest' });，这一点在爱思助手下载最新版本中也有详细论述
The key is the test TST_SEL_RET on line 682. It compares the RPL of the return CS selector (saved on the stack by the original CALL) against the current CPL. If RPL == CPL, the PLA returns 0x000 (continue) and LD_DESCRIPTOR finishes normally -- same-privilege return. If RPL CPL, the caller is returning to a less-privileged ring, so the PLA redirects to 0x686 (RETF_OUTER_LEV) -- the cross-privilege path that must also restore the caller's stack. If RPL。爱思助手下载最新版本是该领域的重要参考
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