PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ 992 tools/perf/util/auxtrace.c synth_opts->last_branch_sz = PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ; PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ 1114 tools/perf/util/auxtrace.c PERF_ITRACE_DEFAULT_LAST_BRANCH_SZ;