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-rwxr-xr-xtools/perf/scripts/python/net_dropmonitor.py72
1 files changed, 72 insertions, 0 deletions
diff --git a/tools/perf/scripts/python/net_dropmonitor.py b/tools/perf/scripts/python/net_dropmonitor.py
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+++ b/tools/perf/scripts/python/net_dropmonitor.py
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+# Monitor the system for dropped packets and proudce a report of drop locations and counts
+
+import os
+import sys
+
+sys.path.append(os.environ['PERF_EXEC_PATH'] + \
+ '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
+
+from perf_trace_context import *
+from Core import *
+from Util import *
+
+drop_log = {}
+kallsyms = []
+
+def get_kallsyms_table():
+ global kallsyms
+ try:
+ f = open("/proc/kallsyms", "r")
+ linecount = 0
+ for line in f:
+ linecount = linecount+1
+ f.seek(0)
+ except:
+ return
+
+
+ j = 0
+ for line in f:
+ loc = int(line.split()[0], 16)
+ name = line.split()[2]
+ j = j +1
+ if ((j % 100) == 0):
+ print "\r" + str(j) + "/" + str(linecount),
+ kallsyms.append({ 'loc': loc, 'name' : name})
+
+ print "\r" + str(j) + "/" + str(linecount)
+ kallsyms.sort()
+ return
+
+def get_sym(sloc):
+ loc = int(sloc)
+ for i in kallsyms:
+ if (i['loc'] >= loc):
+ return (i['name'], i['loc']-loc)
+ return (None, 0)
+
+def print_drop_table():
+ print "%25s %25s %25s" % ("LOCATION", "OFFSET", "COUNT")
+ for i in drop_log.keys():
+ (sym, off) = get_sym(i)
+ if sym == None:
+ sym = i
+ print "%25s %25s %25s" % (sym, off, drop_log[i])
+
+
+def trace_begin():
+ print "Starting trace (Ctrl-C to dump results)"
+
+def trace_end():
+ print "Gathering kallsyms data"
+ get_kallsyms_table()
+ print_drop_table()
+
+# called from perf, when it finds a correspoinding event
+def skb__kfree_skb(name, context, cpu, sec, nsec, pid, comm,
+ skbaddr, protocol, location):
+ slocation = str(location)
+ try:
+ drop_log[slocation] = drop_log[slocation] + 1
+ except:
+ drop_log[slocation] = 1