From 883097053d1d3550cab92362a07f413e110520ae Mon Sep 17 00:00:00 2001 From: José Fonseca Date: Tue, 22 Jul 2008 09:45:10 +0900 Subject: win32kprof: Store the profile data as an caller->callee hash table, instead of a trace. --- bin/win32kprof.py | 124 ++++++++++++++++++++---------------------------------- 1 file changed, 46 insertions(+), 78 deletions(-) (limited to 'bin') diff --git a/bin/win32kprof.py b/bin/win32kprof.py index 4ffa4cc694..c36317d23a 100755 --- a/bin/win32kprof.py +++ b/bin/win32kprof.py @@ -117,15 +117,7 @@ class Reader: self.symbols = [] self.symbol_cache = {} self.base_addr = None - self.last_stamp = 0 - self.stamp_base = 0 - def unwrap_stamp(self, stamp): - if stamp < self.last_stamp: - self.stamp_base += 1 << 32 - self.last_stamp = stamp - return self.stamp_base + stamp - def read_map(self, mapfile): # See http://msdn.microsoft.com/en-us/library/k7xkk3e2.aspx last_addr = 0 @@ -140,10 +132,6 @@ class Reader: continue section, offset = section_offset.split(':') addr = int(offset, 16) - if last_addr == addr: - # TODO: handle collapsed functions - #assert last_name == name - continue self.symbols.append((addr, name)) last_addr = addr last_name = name @@ -170,12 +158,12 @@ class Reader: e = i continue if addr == end_addr: - return next_name + return next_name, addr - start_addr if addr > end_addr: s = i continue return name, addr - start_addr - return "0x%08x" % addr, 0 + raise ValueError def lookup_symbol(self, name): for symbol_addr, symbol_name in self.symbols: @@ -187,96 +175,76 @@ class Reader: profile = Profile() fp = file(data, "rb") - entry_format = "II" + entry_format = "IIII" entry_size = struct.calcsize(entry_format) caller = None caller_stack = [] - last_stamp = 0 - delta = 0 while True: entry = fp.read(entry_size) if len(entry) < entry_size: break - addr_exit, stamp = struct.unpack(entry_format, entry) - if addr_exit == 0 and stamp == 0: - break - addr = addr_exit & 0xfffffffe - exit = addr_exit & 0x00000001 + caller_addr, callee_addr, samples_lo, samples_hi = struct.unpack(entry_format, entry) + if caller_addr == 0 and callee_addr == 0: + continue if self.base_addr is None: - ref_addr = self.lookup_symbol('___debug_profile_reference2@0') + ref_addr = self.lookup_symbol('___debug_profile_reference@0') if ref_addr: - self.base_addr = (addr - ref_addr) & ~(options.align - 1) + self.base_addr = (caller_addr - ref_addr) & ~(options.align - 1) else: self.base_addr = 0 - #print hex(self.base_addr) - rel_addr = addr - self.base_addr - #print hex(addr - self.base_addr) - - symbol, offset = self.lookup_addr(rel_addr) - stamp = self.unwrap_stamp(stamp) - delta = stamp - last_stamp - - if not exit: - if options.verbose >= 2: - sys.stderr.write("%08x >> 0x%08x\n" % (stamp, addr)) - if options.verbose: - sys.stderr.write("%+8u >> %s+%u\n" % (delta, symbol, offset)) + sys.stderr.write('Base addr: %08x\n' % self.base_addr) + + samples = (samples_hi << 32) | samples_lo + + try: + caller_raddr = caller_addr - self.base_addr + caller_sym, caller_ofs = self.lookup_addr(caller_raddr) + + try: + caller = profile.functions[caller_sym] + except KeyError: + caller_name = demangle(caller_sym) + caller = Function(caller_sym, caller_name) + profile.add_function(caller) + caller[CALLS] = 0 + caller[SAMPLES] = 0 + except ValueError: + caller = None + + if not callee_addr: + if caller: + caller[SAMPLES] += samples else: - if options.verbose >= 2: - sys.stderr.write("%08x << 0x%08x\n" % (stamp, addr)) - if options.verbose: - sys.stderr.write("%+8u << %s+%u\n" % (delta, symbol, offset)) - - # Eliminate outliers - if exit and delta > 0x1000000: - # TODO: Use a statistic test instead of a threshold - sys.stderr.write("warning: ignoring excessive delta of +%u in function %s\n" % (delta, symbol)) - delta = 0 - - # Remove overhead - # TODO: compute the overhead automatically - delta = max(0, delta - 84) - - if caller is not None: - caller[SAMPLES] += delta - - if not exit: - # Function call + callee_raddr = callee_addr - self.base_addr + callee_sym, callee_ofs = self.lookup_addr(callee_raddr) + try: - callee = profile.functions[symbol] + callee = profile.functions[callee_sym] except KeyError: - name = demangle(symbol) - callee = Function(symbol, name) + callee_name = demangle(callee_sym) + callee = Function(callee_sym, callee_name) profile.add_function(callee) - callee[CALLS] = 1 + callee[CALLS] = samples callee[SAMPLES] = 0 else: - callee[CALLS] += 1 + callee[CALLS] += samples if caller is not None: try: call = caller.calls[callee.id] except KeyError: call = Call(callee.id) - call[CALLS] = 1 + call[CALLS] = samples caller.add_call(call) else: - call[CALLS] += 1 - caller_stack.append(caller) - - caller = callee - - else: - # Function return - if caller is not None: - assert caller.id == symbol - try: - caller = caller_stack.pop() - except IndexError: - caller = None - - last_stamp = stamp + call[CALLS] += samples + + if options.verbose: + if not callee_addr: + sys.stderr.write('%s+%u: %u\n' % (caller_sym, caller_ofs, samples)) + else: + sys.stderr.write('%s+%u -> %s+%u: %u\n' % (caller_sym, caller_ofs, callee_sym, callee_ofs, samples)) # compute derived data profile.validate() -- cgit v1.2.3