pá 24. 10. 2025 v 3:49 odesílatel Crystal Wood <[email protected]> napsal: > > OK, but as far as I can tell there's no way to get the non-BPF "stop > tracing hit" messages without adding a call to trace_array_init_printk() > into trace_osnoise.c. >
I'm not sure what you mean. The --bpf-action functionality is exclusive for BPF mode, bpf_trace_printk() / bpf_printk(), as Steven clarified, is a BPF helper that triggers a trace event, defined in kernel/trace/bpf_trace.c and kernel/trace/bpf_trace.h. Either way, it seems that the event is not always recorded in the RTLA trace instance due to a bug. It might have something to do with the trace instance recording both osnoise:timerlat_sample and bpf_trace_printk, and failing to record a trace event generated during the handling of another trace event. So this is not a reliable way to test the BPF actions feature, and I'll probably have to use my original idea. Tomas
