# 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 ipv4/tcp_recovery.c?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/net/ipv4/tcp_recovery.c?h=nds-private-remove&id=f01a2161577d31b14581e0db3bbbdfa963f145b6'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4/tcp_recovery.c?h=nds-private-remove&id=f01a2161577d31b14581e0db3bbbdfa963f145b6'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/net/ipv4/tcp_recovery.c?h=nds-private-remove&id=f01a2161577d31b14581e0db3bbbdfa963f145b6'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/net/ipv4/tcp_recovery.c'> <input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='f01a2161577d31b14581e0db3bbbdfa963f145b6'/><select name='qt'> <option value='grep'>log msg</option> <option value='author'>author</option> <option value='committer'>committer</option> <option value='range'>range</option> </select> <input class='txt' type='search' size='10' name='q' value=''/> <input type='submit' value='search'/> </form> </td></tr></table> <div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&id=f01a2161577d31b14581e0db3bbbdfa963f145b6'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/net?h=nds-private-remove&id=f01a2161577d31b14581e0db3bbbdfa963f145b6'>net</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/ipv4?h=nds-private-remove&id=f01a2161577d31b14581e0db3bbbdfa963f145b6'>ipv4</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/ipv4/tcp_recovery.c?h=nds-private-remove&id=f01a2161577d31b14581e0db3bbbdfa963f145b6'>tcp_recovery.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/net/ipv4/tcp_recovery.c?h=nds-private-remove&id=f01a2161577d31b14581e0db3bbbdfa963f145b6&showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>