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Hi llvm-dev, I've been implementing a tool for analysing XRay traces. A recap of XRay's original RFC [0] mentions a tool that does function call accounting as a starting point. This is implemented currently in D21987 [1], and is being reviewed by David Blaikie. One key issue in that review is the dependency between the log format determined by the XRay runtime implementation in compiler-rt [2] and the tool reading these log entries. While it seems obvious that we should document clearly the file format of the...

...stops when the main thread exits. Just a quick update, I have some patches under review that when applied cleanly to LLVM and compiler-rt allows for building applications with XRay tracing enabled on Linux binaries from start to end. The list of patches to apply are: * https://reviews.llvm.org/D21987 (accounting tool, lives in llvm) * https://reviews.llvm.org/D21612 then https://reviews.llvm.org/D21982 (compiler-rt XRay runtime implementation) To test this out, I built clang with XRay and ran it on a hello world application. Here's how I did it: 1) Build clang+compiler-rt with the above...

...a preference between the two options provided above? - Any other alternatives we should consider? - Which parts of which options do you prefer, and is there a synthesis of either of those options that appeals to you? Thanks in advance! [0] - `llvm-xray extract` defined in https://reviews.llvm.org/D21987 [1] - `llvm-xray convert` being reviewed in https://reviews.llvm.org/D24376 [2] - FDR mode ongoing implementation (work in progress) at https://reviews.llvm.org/D27038 [3] - Buffer Queue implementation (work in progress) at https://reviews.llvm.org/D26232 -- Dean _________________________________...

...a preference between the two options provided above? - Any other alternatives we should consider? - Which parts of which options do you prefer, and is there a synthesis of either of those options that appeals to you? Thanks in advance! [0] - `llvm-xray extract` defined in https://reviews.llvm.org/D21987 [1] - `llvm-xray convert` being reviewed in https://reviews.llvm.org/D24376 [2] - FDR mode ongoing implementation (work in progress) at https://reviews.llvm.org/D27038 [3] - Buffer Queue implementation (work in progress) at https://reviews.llvm.org/D26232 -- Dean

...s at gmail.com <mailto:dean.berris at gmail.com>> wrote: > Hi llvm-dev, > > I've been implementing a tool for analysing XRay traces. A recap of XRay's original RFC [0] mentions a tool that does function call accounting as a starting point. This is implemented currently in D21987 [1], and is being reviewed by David Blaikie. > > One key issue in that review is the dependency between the log format determined by the XRay runtime implementation in compiler-rt [2] and the tool reading these log entries. > > While it seems obvious that we should document clearly th...