PERF_ITRACE_DEFAULT_CALLCHAIN_SZ  991 tools/perf/util/auxtrace.c 	synth_opts->callchain_sz = PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;
PERF_ITRACE_DEFAULT_CALLCHAIN_SZ 1098 tools/perf/util/auxtrace.c 					PERF_ITRACE_DEFAULT_CALLCHAIN_SZ;