tracepoint_string
rwb_trace_step(rwb, tracepoint_string("scale up"));
rwb_trace_step(rwb, tracepoint_string("scale down"));
#define TPS(x) tracepoint_string(x)
#define TPS(x) tracepoint_string(x)
#define TPS(x) tracepoint_string(x)
#define TPS(x) tracepoint_string(x)
#define TPS(x) tracepoint_string(x)
#define TP_FCT tracepoint_string(__func__)