完全禁用NVCC的优化 [英] Completely disable optimizations on NVCC

问题描述

我正在测量GPU上的峰值单精度触发器，因为我正在修改PTX文件以对寄存器执行连续的MAD指令。不幸的是，编译器删除所有的代码，因为它实际上没有什么有用的，因为我不执行任何加载/存储的数据。是否有编译器标志或编译指令添加到代码，以便编译器不会碰它？

I'm trying to measure peak single-precision flops on my GPU, for that I'm modifying a PTX file to perform successive MAD instructions on registers. Unfortunately the compiler is removing all the code because it actually does nothing usefull since I do not perform any load/store of the data. Is there a compiler flag or pragma to add to the code so the compiler does not touch it?

谢谢。

推荐答案

我不认为有任何方法来关闭这样的优化在编译器。您可以通过添加代码来存储您的值，并将该代码包装在总是false的条件语句中来解决此问题。要使编译器不能确定始终为false，使用至少一个变量（不只是常量）。

I don't think there is any way to turn off such optimization in the compiler. You can work around this by adding code to store your values and wrapping that code in a conditional statement that is always false. To make a conditional that the compiler can't determine to always be false, use at least one variable (not just constants).

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