On the left frame of the Profiler tool window ( View | Tool Windows | Profiler), click. This action is available on macOS (DTrace) only. Note that it becomes available in the context menu only when all the profiler navigation data is processed.Ĭopy frame information to clipboard only the frame name ( Copy Frame) or the sequence of frame names from the stack bottom up to the selected frame ( Copy Stack up to Frame). On Linux, Jump to Source is supported for Perf version 4.0.0 and later.
#Graphclick linux code#
Navigate to the source code ( Jump to Source). Locate the selected method in another tab (for example, Focus on method in Methods List for a Flame Graph block). Right-click the necessary method and select another view in which you want to open it: The Profiler tool window allows you to jump between the tabs while staying focused on a specific method. In this case, try another version of Perf. This indicates that Perf tool you are using is compiled without access to demangling functions, or it is disabled. On Linux, you may get mangled function names in profiling results.
On Linux, CLion shows meaningful thread names if they were set in the program, and on macOS thread names are shown as id-s. The left-hand part lists the application threads and All threads merged.
In the CPU Profiler tool window, you can see the collected data presented in three tabs: Flame Graph, Call Tree, and Method List. To stop the profiler prior to stopping the application, use the Stop button in the Profiler tool window. When you launch profiling, CLion notifies you if the profiler is attached successfully.Īfter the application stops, and the profiling data is ready, CLion shows a balloon with a link to the CPU Profiler tool window (also accessible from the main menu View | Tool Windows | CPU Profiler): You can also attach the profiler to a running process (call Run | Attach Profiler to Process): Select a run configuration from the list on the toolbar and click or call Run | Profile from the main menu:Īlternatively, select Profile from the left gutter menu of a program entry point or a function that you want to profile: To avoid this, you can configure another directory to be used for profiling output in Settings / Preferences | Build, Execution, Deployment | Dynamic Analysis Tools | Profiler.Ĭlear the Delete file(s) on exit checkbox if you prefer the logs not to be deleted automatically.
#Graphclick linux full#
In case it gets full during profiling, the program terminates with an error. As an example, the default value is set to 99 Hertz instead of 100 Hertz to avoid lockstep sampling with other possible activity with a sampling frequency of 100Hz.īy default, the output of Perf is placed into /tmp, which can have limited capacity. When choosing a sampling rate, mind other timer-driven activities that may be scheduled in your system. If required, you can change the profiler's sampling frequency in Settings / Preferences | Build, Execution, Deployment | Dynamic Analysis Tools | Profiler. The default sampling rate value is rather high, which might require a lot of disk space for long-running programs. On Linux, the profiler implementation does not depend on this, but on macOS, we recommend setting the -fno-omit-frame-pointer compilation flag for gcc and both -fno-omit-frame-pointer and -mno-omit-leaf-frame-pointer for clang. Set(CMAKE_C_FLAGS "$ -O0")Īlso, compilers can use the frame pointer register as a general-purpose register for optimization purposes, which may lead to broken stack traces. To make sure none of the frames are missing due to inlining, set the optimization level to -O0 in your CMakeLists.txt: The profiler relies on debug information to provide meaningful output data and navigation, so Debug configurations are preferable to be used for profiling.Ĭompiler optimizations, such as inlining, can influence profiling results. You can also set the path manually in Settings / Preferences | Build, Execution, Deployment | Dynamic Analysis Tools | Profiler. You can set this up by adding set(CMAKE_OSX_ARCHITECTURES "arm64") to your CMakeLists.txt.ĬLion automatically detects the Perf or DTrace executable in case its location is included in the PATH environment variable. When working on Apple M1, make sure your application is built for the arm64 architecture and not 圆4. On Apple silicon machines, DTrace's default protection level allows profiling arm64 applications only. Check it by calling the dtrace command in the terminal. The only required tool is DTrace, which is most likely installed by default on your macOS.