# 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")
	except:
		return

	for line in f:
		loc = int(line.split()[0], 16)
		name = line.split()[2]
		kallsyms.append((loc, name))
	kallsyms.sort()

def get_sym(sloc):
	loc = int(sloc)

	# Invariant: kallsyms[i][0] <= loc for all 0 <= i <= start
	#            kallsyms[i][0] > loc for all end <= i < len(kallsyms)
	start, end = -1, len(kallsyms)
	while end != start + 1:
		pivot = (start + end) // 2
		if loc < kallsyms[pivot][0]:
			end = pivot
		else:
			start = pivot

	# Now (start == -1 or kallsyms[start][0] <= loc)
	# and (start == len(kallsyms) - 1 or loc < kallsyms[start + 1][0])
	if start >= 0:
		symloc, name = kallsyms[start]
		return (name, loc - symloc)
	else:
		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, callchain,
		   skbaddr, location, protocol):
	slocation = str(location)
	try:
		drop_log[slocation] = drop_log[slocation] + 1
	except:
		drop_log[slocation] = 1
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/fs?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>fs</a>/<a href='/cgit.cgi/linux/net-next.git/commit/fs/affs?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>affs</a>/<a href='/cgit.cgi/linux/net-next.git/commit/fs/affs/super.c?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>super.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='2e4333c14de06a333783d6812cf3c4998f78b0c8'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-11 10:17:39 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-11 10:17:39 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/fs/affs/super.c?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>2e4333c14de06a333783d6812cf3c4998f78b0c8</a> (<a href='/cgit.cgi/linux/net-next.git/patch/fs/affs/super.c?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>368428514d70f34f2261c7f954f241f886d6bb51</a> /<a href='/cgit.cgi/linux/net-next.git/tree/fs/affs/super.c?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>fs/affs/super.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/fs/affs/super.c?id=045169816b31b10faed984b01c390db1b32ee4c1'>045169816b31b10faed984b01c390db1b32ee4c1</a> (<a href='/cgit.cgi/linux/net-next.git/diff/fs/affs/super.c?id=2e4333c14de06a333783d6812cf3c4998f78b0c8&amp;id2=045169816b31b10faed984b01c390db1b32ee4c1'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/fs/affs/super.c?id=ba735155b9647b6167fd50276ca0fbfbce4e836c'>ba735155b9647b6167fd50276ca0fbfbce4e836c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/fs/affs/super.c?id=2e4333c14de06a333783d6812cf3c4998f78b0c8&amp;id2=ba735155b9647b6167fd50276ca0fbfbce4e836c'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus</div><div class='commit-msg'>Pull MIPS fixes from Ralf Baechle:
 "Two more MIPS fixes for 4.9:

   - RTC: Return -ENODEV so an external RTC will be tried

   - Fix mask of GPE frequency

  These two have been tested on Imagination's automated test system and
  also both received positive reviews on the linux-mips mailing list"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: Lantiq: Fix mask of GPE frequency
  MIPS: Return -ENODEV from weak implementation of rtc_mips_set_time
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>Diffstat</a> (limited to 'fs/affs/super.c')</div><table summary='diffstat' class='diffstat'>