company-desktop
67d6545e6c
diag: 增加调用栈抓取,定位开图期 1140 次截面回写的成因
现象:开图期间 EwPipe::RegionAcisout 被调用 1140 次、耗时 2.38 s,
把几何又序列化回 SAT。之前只知现象不知来源。
新增 SectionPerf::TraceCallStack():用 RtlCaptureStackBackTrace + GetModuleHandleExW
把栈帧解析成 "模块名 + RVA" 并写进报告文件。正式代码里不开启,
只在 AEC_WRITEBACK_TRACE=1 时于 RegionAcisoutDwgOutFields 首次调用处抓一次。
结论(栈已定位):
subViewportDraw -> base_ViewportDraw -> ... -> base_DeepClone
-> AcDbObject::dwgOut -> AecDbEwPipeBase::dwgOutFields -> RegionAcisout
即:不是保存,而是绘制期的深拷贝。AecDbEntityCommon::base_DeepClone
(AecRxBase/AecDbEntityCommon.cpp:1265)用
AcDbDeepCloneFiler filer; GetMe()->dwgOut(&filer); pClone->dwgIn(&filer);
实现拷贝,于是每次克隆实体,截面都要写一个临时 SAT 文件再读回来。
读的那一半现在已被 kText 缓存吃掉,剩下 acisOut 写文件这半(2.38 s)。
顺带修正一个文档缺陷:inc/SectionPerfCounter.h 里 %TEMP%\aec_section_perf.txt
的注释之前被转义吃掉变成了 %TEMP%<BEL>ec_section_perf.txt。
修法(跳过深拷贝期的区域序列化 / 直接写缓存里的 SAT 原文)都需要动
AecDbEntityCommon 的拷贝契约或先审计 m_pRegion 的写操作,风险面不一致,
只把分析与三种方案写进 pipe-section-region-performance-plan.md,本次不改行为。
验证:R230 Debug 编译通过并部署;AEC_WRITEBACK_TRACE=1 跑图一次,栈如文档所示。
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