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Subject[PATCH 25/37] perf scripts python: call-graph-from-sql.py: Add data helper functions
Date
From: Adrian Hunter <adrian.hunter@intel.com>

Add helper functions for a few common cases.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20181001062853.28285-11-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/scripts/python/call-graph-from-sql.py | 54 +++++++++++++-----------
1 file changed, 29 insertions(+), 25 deletions(-)

diff --git a/tools/perf/scripts/python/call-graph-from-sql.py b/tools/perf/scripts/python/call-graph-from-sql.py
index ada486048ad8..7f2eabe7dacd 100644
--- a/tools/perf/scripts/python/call-graph-from-sql.py
+++ b/tools/perf/scripts/python/call-graph-from-sql.py
@@ -52,6 +52,28 @@ from PySide.QtGui import *
from PySide.QtSql import *
from decimal import *

+# Data formatting helpers
+
+def dsoname(name):
+ if name == "[kernel.kallsyms]":
+ return "[kernel]"
+ return name
+
+# Percent to one decimal place
+
+def PercentToOneDP(n, d):
+ if not d:
+ return "0.0"
+ x = (n * Decimal(100)) / d
+ return str(x.quantize(Decimal(".1"), rounding=ROUND_HALF_UP))
+
+# Helper for queries that must not fail
+
+def QueryExec(query, stmt):
+ ret = query.exec_(stmt)
+ if not ret:
+ raise Exception("Query failed: " + query.lastError().text())
+
class TreeItem():

def __init__(self, db, row, parent_item):
@@ -73,9 +95,7 @@ class TreeItem():
def setUpRoot(self):
self.query_done = True
query = QSqlQuery(self.db)
- ret = query.exec_('SELECT id, comm FROM comms')
- if not ret:
- raise Exception("Query failed: " + query.lastError().text())
+ QueryExec(query, 'SELECT id, comm FROM comms')
while query.next():
if not query.value(0):
continue
@@ -91,9 +111,7 @@ class TreeItem():
self.child_items = []
self.child_count = 0
query = QSqlQuery(self.db)
- ret = query.exec_('SELECT thread_id, ( SELECT pid FROM threads WHERE id = thread_id ), ( SELECT tid FROM threads WHERE id = thread_id ) FROM comm_threads WHERE comm_id = ' + str(comm_id))
- if not ret:
- raise Exception("Query failed: " + query.lastError().text())
+ QueryExec(query, 'SELECT thread_id, ( SELECT pid FROM threads WHERE id = thread_id ), ( SELECT tid FROM threads WHERE id = thread_id ) FROM comm_threads WHERE comm_id = ' + str(comm_id))
while query.next():
child_item = TreeItem(self.db, self.child_count, self)
self.child_items.append(child_item)
@@ -114,18 +132,6 @@ class TreeItem():
def getRow(self):
return self.row

- def timePercent(self, b):
- if not self.time:
- return "0.0"
- x = (b * Decimal(100)) / self.time
- return str(x.quantize(Decimal('.1'), rounding=ROUND_HALF_UP))
-
- def branchPercent(self, b):
- if not self.branch_count:
- return "0.0"
- x = (b * Decimal(100)) / self.branch_count
- return str(x.quantize(Decimal('.1'), rounding=ROUND_HALF_UP))
-
def addChild(self, call_path_id, name, dso, count, time, branch_count):
child_item = TreeItem(self.db, self.child_count, self)
child_item.comm_id = self.comm_id
@@ -134,14 +140,12 @@ class TreeItem():
child_item.branch_count = branch_count
child_item.time = time
child_item.data[0] = name
- if dso == "[kernel.kallsyms]":
- dso = "[kernel]"
- child_item.data[1] = dso
+ child_item.data[1] = dsoname(dso)
child_item.data[2] = str(count)
child_item.data[3] = str(time)
- child_item.data[4] = self.timePercent(time)
+ child_item.data[4] = PercentToOneDP(time, self.time)
child_item.data[5] = str(branch_count)
- child_item.data[6] = self.branchPercent(branch_count)
+ child_item.data[6] = PercentToOneDP(branch_count, self.branch_count)
self.child_items.append(child_item)
self.child_count += 1

@@ -189,12 +193,12 @@ class TreeItem():
self.branch_count = total_branch_count
if self.branch_count:
for child_item in self.child_items:
- child_item.data[6] = self.branchPercent(child_item.branch_count)
+ child_item.data[6] = PercentToOneDP(child_item.branch_count, self.branch_count)
if total_time > self.time:
self.time = total_time
if self.time:
for child_item in self.child_items:
- child_item.data[4] = self.timePercent(child_item.time)
+ child_item.data[4] = PercentToOneDP(child_item.time, self.time)

def childCount(self):
if not self.query_done:
--
2.14.4
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