| "track","process","thread","thread_process","ts","dur","category","name","arg_set_id" | |
| "[NULL]","[NULL]","t1","[NULL]",1000,0,"cat","name1",1 | |
| "[NULL]","[NULL]","t1","[NULL]",2000,0,"cat","name2",2 | |
| "[NULL]","[NULL]","t1","[NULL]",3000,0,"cat","name3",3 | |
| "[NULL]","[NULL]","t1","[NULL]",4000,0,"cat","name4",4 |