This is xnu-8019. See this file in:
Directory listing for xnu-8019//tools/tests/perf_index
Makefile
PerfIndex_COPS_Module/
README
fail.h
md5.c
md5.h
perf_index.c
perf_index.h
perfindex-compile.c
perfindex-cpu.c
perfindex-fault.c
perfindex-file_create.c
perfindex-file_read.c
perfindex-file_write.c
perfindex-iperf.c
perfindex-memory.c
perfindex-ram_file_create.c
perfindex-ram_file_read.c
perfindex-ram_file_write.c
perfindex-syscall.c
perfindex-zfod.c
ramdisk.c
ramdisk.h
test_controller.py
test_fault_helper.c
test_fault_helper.h
test_file_helper.c
test_file_helper.h