我致力于改善几个项目的建筑。 我大大改善了建筑时间,我认为瓶颈问题更加棘手。
该建筑使用GNU风格的造物。 我生成了一系列依赖性档案(.d),并将它们列入档案,否则就没有任何缺陷(例如,没有事先编造的头盔或其他ach机制)。
The build takes about 95 seconds on a 32-core sparc ultra, running with 16 threads in parallel. Idle time hovers around 80% while the build runs, with kernel time hovering between 8-10%. I put the code in /tmp, but most of the compiler support files are NFS mounted and I believe this may be creating a performance bottleneck.
有哪些工具用于测量和检查;追踪这些问题?
From my own experience, compiling C/C++ code requires reading a lot of header files by C preprocessor. I ve experienced situations when it took more than 50% of g++ run-time to generate a complete translation unit.
As you mentioned that it idles 80% when compiling it must be waiting for I/O then. iostat and DTrace would be a good starting point.
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