1 # Display a process of packets and processed time.
2 # It helps us to investigate networking or network device.
5 # tx: show only tx chart
6 # rx: show only rx chart
7 # dev=: show only thing related to specified device
8 # debug: work with debug mode. It shows buffer status.
13 sys.path.append(os.environ['PERF_EXEC_PATH'] + \
14 '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
16 from perf_trace_context import *
20 all_event_list = []; # insert all tracepoint event related with this script
21 irq_dic = {}; # key is cpu and value is a list which stacks irqs
22 # which raise NET_RX softirq
23 net_rx_dic = {}; # key is cpu and value include time of NET_RX softirq-entry
24 # and a list which stacks receive
25 receive_hunk_list = []; # a list which include a sequence of receive events
26 rx_skb_list = []; # received packet list for matching
27 # skb_copy_datagram_iovec
29 buffer_budget = 65536; # the budget of rx_skb_list, tx_queue_list and
31 of_count_rx_skb_list = 0; # overflow count
33 tx_queue_list = []; # list of packets which pass through dev_queue_xmit
34 of_count_tx_queue_list = 0; # overflow count
36 tx_xmit_list = []; # list of packets which pass through dev_hard_start_xmit
37 of_count_tx_xmit_list = 0; # overflow count
39 tx_free_list = []; # list of packets which is freed
44 dev = 0; # store a name of device specified by option "dev="
47 # indices of event_info tuple
55 # Calculate a time interval(msec) from src(nsec) to dst(nsec)
56 def diff_msec(src, dst):
57 return (dst - src) / 1000000.0
59 # Display a process of transmitting a packet
60 def print_transmit(hunk):
61 if dev != 0 and hunk['dev'].find(dev) < 0:
63 print "%7s %5d %6d.%06dsec %12.3fmsec %12.3fmsec" % \
64 (hunk['dev'], hunk['len'],
65 nsecs_secs(hunk['queue_t']),
66 nsecs_nsecs(hunk['queue_t'])/1000,
67 diff_msec(hunk['queue_t'], hunk['xmit_t']),
68 diff_msec(hunk['xmit_t'], hunk['free_t']))
70 # Format for displaying rx packet processing
71 PF_IRQ_ENTRY= " irq_entry(+%.3fmsec irq=%d:%s)"
72 PF_SOFT_ENTRY=" softirq_entry(+%.3fmsec)"
73 PF_NAPI_POLL= " napi_poll_exit(+%.3fmsec %s)"
76 PF_NET_RECV= " |---netif_receive_skb(+%.3fmsec skb=%x len=%d)"
77 PF_NET_RX= " |---netif_rx(+%.3fmsec skb=%x)"
78 PF_CPY_DGRAM= " | skb_copy_datagram_iovec(+%.3fmsec %d:%s)"
79 PF_KFREE_SKB= " | kfree_skb(+%.3fmsec location=%x)"
80 PF_CONS_SKB= " | consume_skb(+%.3fmsec)"
82 # Display a process of received packets and interrputs associated with
84 def print_receive(hunk):
86 irq_list = hunk['irq_list']
87 cpu = irq_list[0]['cpu']
88 base_t = irq_list[0]['irq_ent_t']
89 # check if this hunk should be showed
91 for i in range(len(irq_list)):
92 if irq_list[i]['name'].find(dev) >= 0:
100 print "%d.%06dsec cpu=%d" % \
101 (nsecs_secs(base_t), nsecs_nsecs(base_t)/1000, cpu)
102 for i in range(len(irq_list)):
103 print PF_IRQ_ENTRY % \
104 (diff_msec(base_t, irq_list[i]['irq_ent_t']),
105 irq_list[i]['irq'], irq_list[i]['name'])
107 irq_event_list = irq_list[i]['event_list']
108 for j in range(len(irq_event_list)):
109 irq_event = irq_event_list[j]
110 if irq_event['event'] == 'netif_rx':
112 (diff_msec(base_t, irq_event['time']),
113 irq_event['skbaddr'])
115 print PF_SOFT_ENTRY % \
116 diff_msec(base_t, hunk['sirq_ent_t'])
118 event_list = hunk['event_list']
119 for i in range(len(event_list)):
120 event = event_list[i]
121 if event['event_name'] == 'napi_poll':
122 print PF_NAPI_POLL % \
123 (diff_msec(base_t, event['event_t']), event['dev'])
124 if i == len(event_list) - 1:
129 print PF_NET_RECV % \
130 (diff_msec(base_t, event['event_t']), event['skbaddr'],
132 if 'comm' in event.keys():
134 print PF_CPY_DGRAM % \
135 (diff_msec(base_t, event['comm_t']),
136 event['pid'], event['comm'])
137 elif 'handle' in event.keys():
139 if event['handle'] == "kfree_skb":
140 print PF_KFREE_SKB % \
144 elif event['handle'] == "consume_skb":
145 print PF_CONS_SKB % \
156 for i in range(len(sys.argv)):
164 elif arg.find('dev=',0, 4) >= 0:
168 if show_tx == 0 and show_rx == 0:
173 # order all events in time
174 all_event_list.sort(lambda a,b :cmp(a[EINFO_IDX_TIME],
177 for i in range(len(all_event_list)):
178 event_info = all_event_list[i]
179 name = event_info[EINFO_IDX_NAME]
180 if name == 'irq__softirq_exit':
181 handle_irq_softirq_exit(event_info)
182 elif name == 'irq__softirq_entry':
183 handle_irq_softirq_entry(event_info)
184 elif name == 'irq__softirq_raise':
185 handle_irq_softirq_raise(event_info)
186 elif name == 'irq__irq_handler_entry':
187 handle_irq_handler_entry(event_info)
188 elif name == 'irq__irq_handler_exit':
189 handle_irq_handler_exit(event_info)
190 elif name == 'napi__napi_poll':
191 handle_napi_poll(event_info)
192 elif name == 'net__netif_receive_skb':
193 handle_netif_receive_skb(event_info)
194 elif name == 'net__netif_rx':
195 handle_netif_rx(event_info)
196 elif name == 'skb__skb_copy_datagram_iovec':
197 handle_skb_copy_datagram_iovec(event_info)
198 elif name == 'net__net_dev_queue':
199 handle_net_dev_queue(event_info)
200 elif name == 'net__net_dev_xmit':
201 handle_net_dev_xmit(event_info)
202 elif name == 'skb__kfree_skb':
203 handle_kfree_skb(event_info)
204 elif name == 'skb__consume_skb':
205 handle_consume_skb(event_info)
206 # display receive hunks
208 for i in range(len(receive_hunk_list)):
209 print_receive(receive_hunk_list[i])
210 # display transmit hunks
212 print " dev len Qdisc " \
214 for i in range(len(tx_free_list)):
215 print_transmit(tx_free_list[i])
217 print "debug buffer status"
218 print "----------------------------"
219 print "xmit Qdisc:remain:%d overflow:%d" % \
220 (len(tx_queue_list), of_count_tx_queue_list)
221 print "xmit netdevice:remain:%d overflow:%d" % \
222 (len(tx_xmit_list), of_count_tx_xmit_list)
223 print "receive:remain:%d overflow:%d" % \
224 (len(rx_skb_list), of_count_rx_skb_list)
226 # called from perf, when it finds a correspoinding event
227 def irq__softirq_entry(name, context, cpu, sec, nsec, pid, comm, callchain, vec):
228 if symbol_str("irq__softirq_entry", "vec", vec) != "NET_RX":
230 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec)
231 all_event_list.append(event_info)
233 def irq__softirq_exit(name, context, cpu, sec, nsec, pid, comm, callchain, vec):
234 if symbol_str("irq__softirq_entry", "vec", vec) != "NET_RX":
236 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec)
237 all_event_list.append(event_info)
239 def irq__softirq_raise(name, context, cpu, sec, nsec, pid, comm, callchain, vec):
240 if symbol_str("irq__softirq_entry", "vec", vec) != "NET_RX":
242 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec)
243 all_event_list.append(event_info)
245 def irq__irq_handler_entry(name, context, cpu, sec, nsec, pid, comm,
246 callchain, irq, irq_name):
247 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
249 all_event_list.append(event_info)
251 def irq__irq_handler_exit(name, context, cpu, sec, nsec, pid, comm, callchain, irq, ret):
252 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, irq, ret)
253 all_event_list.append(event_info)
255 def napi__napi_poll(name, context, cpu, sec, nsec, pid, comm, callchain, napi,
256 dev_name, work=None, budget=None):
257 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
258 napi, dev_name, work, budget)
259 all_event_list.append(event_info)
261 def net__netif_receive_skb(name, context, cpu, sec, nsec, pid, comm, callchain, skbaddr,
263 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
264 skbaddr, skblen, dev_name)
265 all_event_list.append(event_info)
267 def net__netif_rx(name, context, cpu, sec, nsec, pid, comm, callchain, skbaddr,
269 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
270 skbaddr, skblen, dev_name)
271 all_event_list.append(event_info)
273 def net__net_dev_queue(name, context, cpu, sec, nsec, pid, comm, callchain,
274 skbaddr, skblen, dev_name):
275 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
276 skbaddr, skblen, dev_name)
277 all_event_list.append(event_info)
279 def net__net_dev_xmit(name, context, cpu, sec, nsec, pid, comm, callchain,
280 skbaddr, skblen, rc, dev_name):
281 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
282 skbaddr, skblen, rc ,dev_name)
283 all_event_list.append(event_info)
285 def skb__kfree_skb(name, context, cpu, sec, nsec, pid, comm, callchain,
286 skbaddr, protocol, location):
287 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
288 skbaddr, protocol, location)
289 all_event_list.append(event_info)
291 def skb__consume_skb(name, context, cpu, sec, nsec, pid, comm, callchain, skbaddr):
292 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
294 all_event_list.append(event_info)
296 def skb__skb_copy_datagram_iovec(name, context, cpu, sec, nsec, pid, comm, callchain,
298 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
300 all_event_list.append(event_info)
302 def handle_irq_handler_entry(event_info):
303 (name, context, cpu, time, pid, comm, irq, irq_name) = event_info
304 if cpu not in irq_dic.keys():
306 irq_record = {'irq':irq, 'name':irq_name, 'cpu':cpu, 'irq_ent_t':time}
307 irq_dic[cpu].append(irq_record)
309 def handle_irq_handler_exit(event_info):
310 (name, context, cpu, time, pid, comm, irq, ret) = event_info
311 if cpu not in irq_dic.keys():
313 irq_record = irq_dic[cpu].pop()
314 if irq != irq_record['irq']:
316 irq_record.update({'irq_ext_t':time})
317 # if an irq doesn't include NET_RX softirq, drop.
318 if 'event_list' in irq_record.keys():
319 irq_dic[cpu].append(irq_record)
321 def handle_irq_softirq_raise(event_info):
322 (name, context, cpu, time, pid, comm, vec) = event_info
323 if cpu not in irq_dic.keys() \
324 or len(irq_dic[cpu]) == 0:
326 irq_record = irq_dic[cpu].pop()
327 if 'event_list' in irq_record.keys():
328 irq_event_list = irq_record['event_list']
331 irq_event_list.append({'time':time, 'event':'sirq_raise'})
332 irq_record.update({'event_list':irq_event_list})
333 irq_dic[cpu].append(irq_record)
335 def handle_irq_softirq_entry(event_info):
336 (name, context, cpu, time, pid, comm, vec) = event_info
337 net_rx_dic[cpu] = {'sirq_ent_t':time, 'event_list':[]}
339 def handle_irq_softirq_exit(event_info):
340 (name, context, cpu, time, pid, comm, vec) = event_info
343 if cpu in irq_dic.keys():
344 irq_list = irq_dic[cpu]
346 if cpu in net_rx_dic.keys():
347 sirq_ent_t = net_rx_dic[cpu]['sirq_ent_t']
348 event_list = net_rx_dic[cpu]['event_list']
350 if irq_list == [] or event_list == 0:
352 rec_data = {'sirq_ent_t':sirq_ent_t, 'sirq_ext_t':time,
353 'irq_list':irq_list, 'event_list':event_list}
354 # merge information realted to a NET_RX softirq
355 receive_hunk_list.append(rec_data)
357 def handle_napi_poll(event_info):
358 (name, context, cpu, time, pid, comm, napi, dev_name,
359 work, budget) = event_info
360 if cpu in net_rx_dic.keys():
361 event_list = net_rx_dic[cpu]['event_list']
362 rec_data = {'event_name':'napi_poll',
363 'dev':dev_name, 'event_t':time,
364 'work':work, 'budget':budget}
365 event_list.append(rec_data)
367 def handle_netif_rx(event_info):
368 (name, context, cpu, time, pid, comm,
369 skbaddr, skblen, dev_name) = event_info
370 if cpu not in irq_dic.keys() \
371 or len(irq_dic[cpu]) == 0:
373 irq_record = irq_dic[cpu].pop()
374 if 'event_list' in irq_record.keys():
375 irq_event_list = irq_record['event_list']
378 irq_event_list.append({'time':time, 'event':'netif_rx',
379 'skbaddr':skbaddr, 'skblen':skblen, 'dev_name':dev_name})
380 irq_record.update({'event_list':irq_event_list})
381 irq_dic[cpu].append(irq_record)
383 def handle_netif_receive_skb(event_info):
384 global of_count_rx_skb_list
386 (name, context, cpu, time, pid, comm,
387 skbaddr, skblen, dev_name) = event_info
388 if cpu in net_rx_dic.keys():
389 rec_data = {'event_name':'netif_receive_skb',
390 'event_t':time, 'skbaddr':skbaddr, 'len':skblen}
391 event_list = net_rx_dic[cpu]['event_list']
392 event_list.append(rec_data)
393 rx_skb_list.insert(0, rec_data)
394 if len(rx_skb_list) > buffer_budget:
396 of_count_rx_skb_list += 1
398 def handle_net_dev_queue(event_info):
399 global of_count_tx_queue_list
401 (name, context, cpu, time, pid, comm,
402 skbaddr, skblen, dev_name) = event_info
403 skb = {'dev':dev_name, 'skbaddr':skbaddr, 'len':skblen, 'queue_t':time}
404 tx_queue_list.insert(0, skb)
405 if len(tx_queue_list) > buffer_budget:
407 of_count_tx_queue_list += 1
409 def handle_net_dev_xmit(event_info):
410 global of_count_tx_xmit_list
412 (name, context, cpu, time, pid, comm,
413 skbaddr, skblen, rc, dev_name) = event_info
414 if rc == 0: # NETDEV_TX_OK
415 for i in range(len(tx_queue_list)):
416 skb = tx_queue_list[i]
417 if skb['skbaddr'] == skbaddr:
419 tx_xmit_list.insert(0, skb)
421 if len(tx_xmit_list) > buffer_budget:
423 of_count_tx_xmit_list += 1
426 def handle_kfree_skb(event_info):
427 (name, context, cpu, time, pid, comm,
428 skbaddr, protocol, location) = event_info
429 for i in range(len(tx_queue_list)):
430 skb = tx_queue_list[i]
431 if skb['skbaddr'] == skbaddr:
434 for i in range(len(tx_xmit_list)):
435 skb = tx_xmit_list[i]
436 if skb['skbaddr'] == skbaddr:
438 tx_free_list.append(skb)
441 for i in range(len(rx_skb_list)):
442 rec_data = rx_skb_list[i]
443 if rec_data['skbaddr'] == skbaddr:
444 rec_data.update({'handle':"kfree_skb",
445 'comm':comm, 'pid':pid, 'comm_t':time})
449 def handle_consume_skb(event_info):
450 (name, context, cpu, time, pid, comm, skbaddr) = event_info
451 for i in range(len(tx_xmit_list)):
452 skb = tx_xmit_list[i]
453 if skb['skbaddr'] == skbaddr:
455 tx_free_list.append(skb)
459 def handle_skb_copy_datagram_iovec(event_info):
460 (name, context, cpu, time, pid, comm, skbaddr, skblen) = event_info
461 for i in range(len(rx_skb_list)):
462 rec_data = rx_skb_list[i]
463 if skbaddr == rec_data['skbaddr']:
464 rec_data.update({'handle':"skb_copy_datagram_iovec",
465 'comm':comm, 'pid':pid, 'comm_t':time})