When running stalld with the queue_track (bpf) backend in logging mode and turning off idle detection, stalld incorrectly reports stalled threads. 

Removing --no_idle_detection from the command line prevents this behavior. Also it seems to only occurr with the queue_track backend and not the sched_debug backend

$ sudo stalld --verbose --foreground --backend=queue_track --no_idle_detection

single_threaded_main:     checking cpu 23 - rt: 0 - starving: 1
stalld:      cpu 0: pid: 8522 starving for 575
stalld:      cpu 1: pid: 9113 starving for 480
stalld:      cpu 2: pid: 8864 starving for 580
stalld:      cpu 3: pid: 8832 starving for 470
stalld:      cpu 4: pid: 8386 starving for 570
stalld:      cpu 5: pid: 8502 starving for 380
stalld:      cpu 6: pid: 8434 starving for 450
stalld:      cpu 7: pid: 7018 starving for 470
stalld:      cpu 8: pid: 7087 starving for 420
stalld:      cpu 9: pid: 9820 starving for 510
stalld:      cpu 10: pid: 8422 starving for 510
stalld:      cpu 11: pid: 9420 starving for 490