forked from mirrors/linux
b504d7f687
Remove mixed indentation in Python scripts. Revert to either all tabs (most common form) or all spaces (4 or 8) depending on what was the intent of the original commit. This is necessary to complete Python3 support as it will flag an error if it encounters mixed indentation. Signed-off-by: Tony Jones <tonyj@suse.de> Link: http://lkml.kernel.org/r/20190302011903.2416-2-tonyj@suse.de Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
78 lines
1.8 KiB
Python
Executable file
78 lines
1.8 KiB
Python
Executable file
# Monitor the system for dropped packets and proudce a report of drop locations and counts
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# SPDX-License-Identifier: GPL-2.0
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from __future__ import print_function
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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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except:
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return
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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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kallsyms.append((loc, name))
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kallsyms.sort()
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def get_sym(sloc):
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loc = int(sloc)
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# Invariant: kallsyms[i][0] <= loc for all 0 <= i <= start
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# kallsyms[i][0] > loc for all end <= i < len(kallsyms)
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start, end = -1, len(kallsyms)
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while end != start + 1:
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pivot = (start + end) // 2
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if loc < kallsyms[pivot][0]:
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end = pivot
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else:
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start = pivot
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# Now (start == -1 or kallsyms[start][0] <= loc)
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# and (start == len(kallsyms) - 1 or loc < kallsyms[start + 1][0])
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if start >= 0:
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symloc, name = kallsyms[start]
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return (name, loc - symloc)
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else:
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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, callchain,
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skbaddr, location, protocol):
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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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