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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, name))
print "\r" + str(j) + "/" + str(linecount)
kallsyms.sort()
return
def get_sym(sloc):
loc = int(sloc)
for symloc, name in kallsyms[::-1]:
if loc >= symloc:
return (name, loc - symloc)
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, location, protocol):
slocation = str(location)
try:
drop_log[slocation] = drop_log[slocation] + 1
except:
drop_log[slocation] = 1
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