perf: net_dropmonitor: Fix symbol-relative addresses

The comparison between traced and symbol addresses is backwards: if the traced address doesn't exactly match a symbol (which we don't expect it to), we'll show the next symbol and the offset to it, whereas we should show the previous symbol and the offset from it. Cc: [email protected] Signed-off-by: Ben Hutchings <[email protected]> Signed-off-by: David S. Miller <[email protected]>
gunnarahlberg · May 22, 2013 · 5a1e99d · 5a1e99d
1 parent 140c3c6
commit 5a1e99d
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/tools/perf/scripts/python/net_dropmonitor.py b/tools/perf/scripts/python/net_dropmonitor.py
@@ -40,9 +40,9 @@ def get_kallsyms_table():
 
 def get_sym(sloc):
 	loc = int(sloc)
-	for i in kallsyms:
-		if (i['loc'] >= loc):
-			return (i['name'], i['loc']-loc)
+	for i in kallsyms[::-1]:
+		if loc >= i['loc']:
+			return (i['name'], loc - i['loc'])
 	return (None, 0)
 
 def print_drop_table():