perf scripts python: call-graph-from-sql.py: Rename to exported-sql-viewer.py

While it is possible to create scripts to analyze the data, an alternative

approach is available to export the data to a sqlite or postgresql database.

Refer to script export-to-sqlite.py or export-to-postgresql.py for more details,

and to script call-graph-from-sql.py for an example of using the database.

and to script exported-sql-viewer.py for an example of using the database.

There is also script intel-pt-events.py which provides an example of how to

unpack the raw data for power events and PTWRITE.

#	pt_example=# \q

#

# An example of using the database is provided by the script

# call-graph-from-sql.py.  Refer to that script for details.

# exported-sql-viewer.py.  Refer to that script for details.

#

# Tables:

#

#	sqlite> .quit

#

# An example of using the database is provided by the script

# call-graph-from-sql.py.  Refer to that script for details.

# exported-sql-viewer.py.  Refer to that script for details.

#

# The database structure is practically the same as created by the script

# export-to-postgresql.py. Refer to that script for details.  A notable

# Following on from the example in the export scripts, a

# call-graph can be displayed for the pt_example database like this:

#

#	python tools/perf/scripts/python/call-graph-from-sql.py pt_example

#	python tools/perf/scripts/python/exported-sql-viewer.py pt_example

#

# Note that for PostgreSQL, this script supports connecting to remote databases

# by setting hostname, port, username, password, and dbname e.g.

#

#	python tools/perf/scripts/python/call-graph-from-sql.py "hostname=myhost username=myuser password=mypassword dbname=pt_example"

#	python tools/perf/scripts/python/exported-sql-viewer.py "hostname=myhost username=myuser password=mypassword dbname=pt_example"

#

# The result is a GUI window with a tree representing a context-sensitive

# call-graph.  Expanding a couple of levels of the tree and adjusting column

def Main():

	if (len(sys.argv) < 2):

		print >> sys.stderr, "Usage is: call-graph-from-sql.py <database name>"

		print >> sys.stderr, "Usage is: exported-sql-viewer.py <database name>"

		raise Exception("Too few arguments")

	dbname = sys.argv[1]