Here is the example of NMT output produced by stress test:
22898:

Native Memory Tracking:

Total: reserved=34226313KB, committed=14753353KB
- Java Heap (reserved=31424512KB, committed=13914112KB)
                            (mmap: reserved=31424512KB, committed=13914112KB)
 
- Class (reserved=1096992KB, committed=52560KB)
                            (classes #5901)
                            ( instance classes #5381, array classes #520)
                            (malloc=1312KB #24829)
                            (mmap: reserved=1095680KB, committed=51248KB)
                            ( Metadata: )
                            ( reserved=47104KB, committed=46256KB)
                            ( used=42088KB)
                            ( free=4168KB)
                            ( waste=0KB =0.00%)
                            ( Class space:)
                            ( reserved=1048576KB, committed=4992KB)
                            ( used=3792KB)
                            ( free=1200KB)
                            ( waste=0KB =0.00%)
 
- Thread (reserved=139697KB, committed=7857KB)
                            (thread #135)
                            (stack: reserved=138620KB, committed=6780KB)
                            (malloc=461KB #717)
                            (arena=616KB #268)
 
- Code (reserved=251302KB, committed=114814KB)
                            (malloc=3618KB #9735)
                            (mmap: reserved=247684KB, committed=111196KB)
 
- GC (reserved=1275090KB, committed=625290KB)
                            (malloc=76178KB #46284)
                            (mmap: reserved=1198912KB, committed=549112KB)
 
- Compiler (reserved=18014398509481980KB, committed=18014398509481980KB)
                            (malloc=323KB #1073)
                            (arena=18014398509481657KB #5)
 
- Internal (reserved=13309KB, committed=13309KB)
                            (malloc=13269KB #9562)
                            (mmap: reserved=40KB, committed=40KB)
 
- Other (reserved=170KB, committed=170KB)
                            (malloc=170KB #18)
 
- Symbol (reserved=8044KB, committed=8044KB)
                            (malloc=4968KB #31063)
                            (arena=3077KB #1)
 
- Native Memory Tracking (reserved=2749KB, committed=2749KB)
                            (malloc=626KB #8879)
                            (tracking overhead=2123KB)
 
- Arena Chunk (reserved=257KB, committed=257KB)
                            (malloc=257KB)
 
- Tracing (reserved=13813KB, committed=13813KB)
                            (malloc=13813KB #258)
 
- Logging (reserved=6KB, committed=6KB)
                            (malloc=6KB #237)
 
- Arguments (reserved=19KB, committed=19KB)
                            (malloc=19KB #483)
 
- Module (reserved=358KB, committed=358KB)
                            (malloc=358KB #2329)