forked from luck/tmp_suning_uos_patched
63e03724b5
A while back I created the dropmonitor protocol, which allowed users to get reports of dropped frames communicated to them via a netlink socket. While useful, several people have now asked that I integrate the ability to do drop monitoring with perf, so they don't have to run additional tools. This patch adds a drop monitor script to the perf suite, and provides the same output that the netlink socket does. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1309801217-22450-1-git-send-email-nhorman@tuxdriver.com Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
73 lines
1.5 KiB
Python
Executable File
73 lines
1.5 KiB
Python
Executable File
# Monitor the system for dropped packets and proudce a report of drop locations and counts
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import os
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import sys
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sys.path.append(os.environ['PERF_EXEC_PATH'] + \
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'/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
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from perf_trace_context import *
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from Core import *
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from Util import *
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drop_log = {}
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kallsyms = []
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def get_kallsyms_table():
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global kallsyms
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try:
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f = open("/proc/kallsyms", "r")
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linecount = 0
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for line in f:
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linecount = linecount+1
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f.seek(0)
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except:
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return
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j = 0
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for line in f:
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loc = int(line.split()[0], 16)
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name = line.split()[2]
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j = j +1
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if ((j % 100) == 0):
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print "\r" + str(j) + "/" + str(linecount),
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kallsyms.append({ 'loc': loc, 'name' : name})
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print "\r" + str(j) + "/" + str(linecount)
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kallsyms.sort()
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return
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def get_sym(sloc):
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loc = int(sloc)
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for i in kallsyms:
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if (i['loc'] >= loc):
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return (i['name'], i['loc']-loc)
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return (None, 0)
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def print_drop_table():
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print "%25s %25s %25s" % ("LOCATION", "OFFSET", "COUNT")
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for i in drop_log.keys():
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(sym, off) = get_sym(i)
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if sym == None:
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sym = i
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print "%25s %25s %25s" % (sym, off, drop_log[i])
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def trace_begin():
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print "Starting trace (Ctrl-C to dump results)"
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def trace_end():
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print "Gathering kallsyms data"
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get_kallsyms_table()
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print_drop_table()
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# called from perf, when it finds a correspoinding event
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def skb__kfree_skb(name, context, cpu, sec, nsec, pid, comm,
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skbaddr, protocol, location):
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slocation = str(location)
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try:
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drop_log[slocation] = drop_log[slocation] + 1
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except:
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drop_log[slocation] = 1
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