Commit 37c1f991 authored by Adrian Hunter's avatar Adrian Hunter Committed by Arnaldo Carvalho de Melo
Browse files

perf scripts python: export-to-sqlite.py: Export switch events 



Export switch events to a new table 'context_switches' and create a view
'context_switches_view'. The table and view will show automatically in
the exported-sql-viewer.py script.

If the table ends up empty, then it and the view are dropped.

Committer testing:

Use the exported-sql-viewer.py and look at "Tables" ->
"context_switches":

  id  machine_id  time             cpu  thread_out_id  comm_out_id  thread_in_id  comm_in_id  flags
  1   1           187836111885918  7    1              1            2             2           3
  2   1           187836111889369  7    1              1            2             2           0
  3   1           187836112464618  7    2              3            1             1           1
  4   1           187836112465511  7    2              3            1             1           0

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190710085810.1650-21-adrian.hunter@intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent abde8722

tools/perf/scripts/python/export-to-sqlite.py

+41 −0
Original line number Diff line number Diff line
@@ -306,6 +306,17 @@ do_query(query, 'CREATE TABLE pwrx (' 
		'last_cstate	integer,'

		'wake_reason	integer)')



do_query(query, 'CREATE TABLE context_switches ('

		'id		integer		NOT NULL	PRIMARY KEY,'

		'machine_id	bigint,'

		'time		bigint,'

		'cpu		integer,'

		'thread_out_id	bigint,'

		'comm_out_id	bigint,'

		'thread_in_id	bigint,'

		'comm_in_id	bigint,'

		'flags		integer)')



# printf was added to sqlite in version 3.8.3

sqlite_has_printf = False

try:
@@ -530,6 +541,29 @@ do_query(query, 'CREATE VIEW power_events_view AS ' 
	' INNER JOIN selected_events ON selected_events.id = evsel_id'

	' WHERE selected_events.name IN (\'cbr\',\'mwait\',\'exstop\',\'pwre\',\'pwrx\')')



do_query(query, 'CREATE VIEW context_switches_view AS '

	'SELECT '

		'context_switches.id,'

		'context_switches.machine_id,'

		'context_switches.time,'

		'context_switches.cpu,'

		'th_out.pid AS pid_out,'

		'th_out.tid AS tid_out,'

		'comm_out.comm AS comm_out,'

		'th_in.pid AS pid_in,'

		'th_in.tid AS tid_in,'

		'comm_in.comm AS comm_in,'

		'CASE	  WHEN context_switches.flags = 0 THEN \'in\''

			' WHEN context_switches.flags = 1 THEN \'out\''

			' WHEN context_switches.flags = 3 THEN \'out preempt\''

			' ELSE context_switches.flags '

		'END AS flags'

	' FROM context_switches'

	' INNER JOIN threads AS th_out ON th_out.id   = context_switches.thread_out_id'

	' INNER JOIN threads AS th_in  ON th_in.id    = context_switches.thread_in_id'

	' INNER JOIN comms AS comm_out ON comm_out.id = context_switches.comm_out_id'

	' INNER JOIN comms AS comm_in  ON comm_in.id  = context_switches.comm_in_id')



do_query(query, 'END TRANSACTION')



evsel_query = QSqlQuery(db)
@@ -571,6 +605,8 @@ exstop_query = QSqlQuery(db) 
exstop_query.prepare("INSERT INTO exstop VALUES (?, ?)")

pwrx_query = QSqlQuery(db)

pwrx_query.prepare("INSERT INTO pwrx VALUES (?, ?, ?, ?)")

context_switch_query = QSqlQuery(db)

context_switch_query.prepare("INSERT INTO context_switches VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)")



def trace_begin():

	printdate("Writing records...")
@@ -620,6 +656,8 @@ def trace_end(): 
		drop("pwrx")

		if is_table_empty("cbr"):

			drop("cbr")

	if is_table_empty("context_switches"):

		drop("context_switches")



	if (unhandled_count):

		printdate("Warning: ", unhandled_count, " unhandled events")
@@ -753,3 +791,6 @@ def synth_data(id, config, raw_buf, *x): 
		pwrx(id, raw_buf)

	elif config == 5:

		cbr(id, raw_buf)



def context_switch_table(*x):

	bind_exec(context_switch_query, 9, x)

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