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On 1/26/18 1:04 AM, Linhai Song via llvm-dev wrote: > > Hello everyone, > > > I am writing a pass to instrument program and count how many basic > block executed. What I have tried is to instrument a local counter > inside each function, add 1 to the local counter inside each basic > block, and save the counter value to a global counter. The current > runtime

Hello everyone, I am writing a pass to instrument program and count how many basic block executed. What I have tried is to instrument a local counter inside each function, add 1 to the local counter inside each basic block, and save the counter value to a global counter. The current runtime overhead is around 25%. Is there any way I can try to lower the overhead? Like keeping the local counter

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