config BR2_PACKAGE_PERF bool "perf" depends on BR2_LINUX_KERNEL depends on BR2_LARGEFILE help perf (sometimes "Perf Events" or perf tools, originally "Performance Counters for Linux") - is a performance analyzing tool in Linux, available from kernel version 2.6.31. User-space controlling utility, called 'perf' has git-like interface with subcommands. It is capable of statistical profiling of entire system (both kernel and user code), single CPU or severals threads. This package builds and install the userspace 'perf' command. It is up to the user to ensure that the kernel configuration has all suitable options enable to allow a proper operation of 'perf'. https://perf.wiki.kernel.org/ comment "perf needs a toolchain w/ largefile and a Linux kernel to be built" depends on !BR2_LINUX_KERNEL || !BR2_LARGEFILE