Configuration of complex ftrace histograms could be hard, using the existing ftrace interface.
The "--sql" option is implemented to simplify this task. It uses a sql-like syntax to define
the histograms and generates necessary ftrace syntetic events and triggers. Each ftrace event
represents a sql tible, while the fields of this event are rows in the table.
The patch set is based on Steven Rostedt's PoC implementation:
https://github.com/rostedt/sqlhist
Tzvetomir Stoyanov (VMware) (4):
trace-cmd: Add new libtracefs API tracefs_instance_file_append()
trace-cmd: Clear synthetic events on reset subcommand
trace-cmd: Clear error log on reset subcommand
trace-cmd: Add "--sql" option to trace-cmd start and record sub
commands
Documentation/trace-cmd-record.1.txt | 37 +
Makefile | 1 +
include/tracefs/tracefs.h | 2 +
lib/tracefs/tracefs-instance.c | 40 +-
tracecmd/Makefile | 12 +-
tracecmd/include/trace-local.h | 4 +
tracecmd/sqlparser/Makefile | 52 +
tracecmd/sqlparser/sqlhist-api.h | 29 +
tracecmd/sqlparser/sqlhist-parse.c | 1454 ++++++++++++++++++++++++++
tracecmd/sqlparser/sqlhist.h | 34 +
tracecmd/sqlparser/sqlhist.l | 59 ++
tracecmd/sqlparser/sqlhist.y | 175 ++++
tracecmd/trace-record.c | 172 ++-
tracecmd/trace-usage.c | 2 +
14 files changed, 2066 insertions(+), 7 deletions(-)
create mode 100644 tracecmd/sqlparser/Makefile
create mode 100644 tracecmd/sqlparser/sqlhist-api.h
create mode 100644 tracecmd/sqlparser/sqlhist-parse.c
create mode 100644 tracecmd/sqlparser/sqlhist.h
create mode 100644 tracecmd/sqlparser/sqlhist.l
create mode 100644 tracecmd/sqlparser/sqlhist.y
--
2.24.1
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