perf scripts python: call-graph-from-sql.py: Add data helper functions

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>

1 files 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: