PERF_SAMPLE_BRANCH_MAX 210 include/uapi/linux/perf_event.h PERF_SAMPLE_BRANCH_MAX = 1U << PERF_SAMPLE_BRANCH_MAX_SHIFT, PERF_SAMPLE_BRANCH_MAX 210 tools/include/uapi/linux/perf_event.h PERF_SAMPLE_BRANCH_MAX = 1U << PERF_SAMPLE_BRANCH_MAX_SHIFT,