On Tue, Aug 3, 2021 at 6:23 AM Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > > From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx> > > This adds the API tracefs_sql() that takes a tep_handle handler, a name, > and a SQL string and parses it to produce a tracefs_synth synthetic event > handler. > > Currently it only supports simple SQL of the type: > > SELECT start.common_pid AS pid, end.common_timestamp.usecs AS usecs > FROM sched_waking AS start JOIN sched_switch AS end > ON start.pid = end.next_pid > > Special thanks to: > > Lukas Bulwahn for first introducing the idea at RT Summit on the Summit > Spring of 2019. Thanks, Steven, for putting this idea to life. I hope that the tracing users appreciate this new declarative interface using SQL and it makes tracing events easier comprehensible to a larger community of users. Lukas
