465 lines
15 KiB
Python
465 lines
15 KiB
Python
|
# Display a process of packets and processed time.
|
||
|
# It helps us to investigate networking or network device.
|
||
|
#
|
||
|
# options
|
||
|
# tx: show only tx chart
|
||
|
# rx: show only rx chart
|
||
|
# dev=: show only thing related to specified device
|
||
|
# debug: work with debug mode. It shows buffer status.
|
||
|
|
||
|
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 *
|
||
|
|
||
|
all_event_list = []; # insert all tracepoint event related with this script
|
||
|
irq_dic = {}; # key is cpu and value is a list which stacks irqs
|
||
|
# which raise NET_RX softirq
|
||
|
net_rx_dic = {}; # key is cpu and value include time of NET_RX softirq-entry
|
||
|
# and a list which stacks receive
|
||
|
receive_hunk_list = []; # a list which include a sequence of receive events
|
||
|
rx_skb_list = []; # received packet list for matching
|
||
|
# skb_copy_datagram_iovec
|
||
|
|
||
|
buffer_budget = 65536; # the budget of rx_skb_list, tx_queue_list and
|
||
|
# tx_xmit_list
|
||
|
of_count_rx_skb_list = 0; # overflow count
|
||
|
|
||
|
tx_queue_list = []; # list of packets which pass through dev_queue_xmit
|
||
|
of_count_tx_queue_list = 0; # overflow count
|
||
|
|
||
|
tx_xmit_list = []; # list of packets which pass through dev_hard_start_xmit
|
||
|
of_count_tx_xmit_list = 0; # overflow count
|
||
|
|
||
|
tx_free_list = []; # list of packets which is freed
|
||
|
|
||
|
# options
|
||
|
show_tx = 0;
|
||
|
show_rx = 0;
|
||
|
dev = 0; # store a name of device specified by option "dev="
|
||
|
debug = 0;
|
||
|
|
||
|
# indices of event_info tuple
|
||
|
EINFO_IDX_NAME= 0
|
||
|
EINFO_IDX_CONTEXT=1
|
||
|
EINFO_IDX_CPU= 2
|
||
|
EINFO_IDX_TIME= 3
|
||
|
EINFO_IDX_PID= 4
|
||
|
EINFO_IDX_COMM= 5
|
||
|
|
||
|
# Calculate a time interval(msec) from src(nsec) to dst(nsec)
|
||
|
def diff_msec(src, dst):
|
||
|
return (dst - src) / 1000000.0
|
||
|
|
||
|
# Display a process of transmitting a packet
|
||
|
def print_transmit(hunk):
|
||
|
if dev != 0 and hunk['dev'].find(dev) < 0:
|
||
|
return
|
||
|
print "%7s %5d %6d.%06dsec %12.3fmsec %12.3fmsec" % \
|
||
|
(hunk['dev'], hunk['len'],
|
||
|
nsecs_secs(hunk['queue_t']),
|
||
|
nsecs_nsecs(hunk['queue_t'])/1000,
|
||
|
diff_msec(hunk['queue_t'], hunk['xmit_t']),
|
||
|
diff_msec(hunk['xmit_t'], hunk['free_t']))
|
||
|
|
||
|
# Format for displaying rx packet processing
|
||
|
PF_IRQ_ENTRY= " irq_entry(+%.3fmsec irq=%d:%s)"
|
||
|
PF_SOFT_ENTRY=" softirq_entry(+%.3fmsec)"
|
||
|
PF_NAPI_POLL= " napi_poll_exit(+%.3fmsec %s)"
|
||
|
PF_JOINT= " |"
|
||
|
PF_WJOINT= " | |"
|
||
|
PF_NET_RECV= " |---netif_receive_skb(+%.3fmsec skb=%x len=%d)"
|
||
|
PF_NET_RX= " |---netif_rx(+%.3fmsec skb=%x)"
|
||
|
PF_CPY_DGRAM= " | skb_copy_datagram_iovec(+%.3fmsec %d:%s)"
|
||
|
PF_KFREE_SKB= " | kfree_skb(+%.3fmsec location=%x)"
|
||
|
PF_CONS_SKB= " | consume_skb(+%.3fmsec)"
|
||
|
|
||
|
# Display a process of received packets and interrputs associated with
|
||
|
# a NET_RX softirq
|
||
|
def print_receive(hunk):
|
||
|
show_hunk = 0
|
||
|
irq_list = hunk['irq_list']
|
||
|
cpu = irq_list[0]['cpu']
|
||
|
base_t = irq_list[0]['irq_ent_t']
|
||
|
# check if this hunk should be showed
|
||
|
if dev != 0:
|
||
|
for i in range(len(irq_list)):
|
||
|
if irq_list[i]['name'].find(dev) >= 0:
|
||
|
show_hunk = 1
|
||
|
break
|
||
|
else:
|
||
|
show_hunk = 1
|
||
|
if show_hunk == 0:
|
||
|
return
|
||
|
|
||
|
print "%d.%06dsec cpu=%d" % \
|
||
|
(nsecs_secs(base_t), nsecs_nsecs(base_t)/1000, cpu)
|
||
|
for i in range(len(irq_list)):
|
||
|
print PF_IRQ_ENTRY % \
|
||
|
(diff_msec(base_t, irq_list[i]['irq_ent_t']),
|
||
|
irq_list[i]['irq'], irq_list[i]['name'])
|
||
|
print PF_JOINT
|
||
|
irq_event_list = irq_list[i]['event_list']
|
||
|
for j in range(len(irq_event_list)):
|
||
|
irq_event = irq_event_list[j]
|
||
|
if irq_event['event'] == 'netif_rx':
|
||
|
print PF_NET_RX % \
|
||
|
(diff_msec(base_t, irq_event['time']),
|
||
|
irq_event['skbaddr'])
|
||
|
print PF_JOINT
|
||
|
print PF_SOFT_ENTRY % \
|
||
|
diff_msec(base_t, hunk['sirq_ent_t'])
|
||
|
print PF_JOINT
|
||
|
event_list = hunk['event_list']
|
||
|
for i in range(len(event_list)):
|
||
|
event = event_list[i]
|
||
|
if event['event_name'] == 'napi_poll':
|
||
|
print PF_NAPI_POLL % \
|
||
|
(diff_msec(base_t, event['event_t']), event['dev'])
|
||
|
if i == len(event_list) - 1:
|
||
|
print ""
|
||
|
else:
|
||
|
print PF_JOINT
|
||
|
else:
|
||
|
print PF_NET_RECV % \
|
||
|
(diff_msec(base_t, event['event_t']), event['skbaddr'],
|
||
|
event['len'])
|
||
|
if 'comm' in event.keys():
|
||
|
print PF_WJOINT
|
||
|
print PF_CPY_DGRAM % \
|
||
|
(diff_msec(base_t, event['comm_t']),
|
||
|
event['pid'], event['comm'])
|
||
|
elif 'handle' in event.keys():
|
||
|
print PF_WJOINT
|
||
|
if event['handle'] == "kfree_skb":
|
||
|
print PF_KFREE_SKB % \
|
||
|
(diff_msec(base_t,
|
||
|
event['comm_t']),
|
||
|
event['location'])
|
||
|
elif event['handle'] == "consume_skb":
|
||
|
print PF_CONS_SKB % \
|
||
|
diff_msec(base_t,
|
||
|
event['comm_t'])
|
||
|
print PF_JOINT
|
||
|
|
||
|
def trace_begin():
|
||
|
global show_tx
|
||
|
global show_rx
|
||
|
global dev
|
||
|
global debug
|
||
|
|
||
|
for i in range(len(sys.argv)):
|
||
|
if i == 0:
|
||
|
continue
|
||
|
arg = sys.argv[i]
|
||
|
if arg == 'tx':
|
||
|
show_tx = 1
|
||
|
elif arg =='rx':
|
||
|
show_rx = 1
|
||
|
elif arg.find('dev=',0, 4) >= 0:
|
||
|
dev = arg[4:]
|
||
|
elif arg == 'debug':
|
||
|
debug = 1
|
||
|
if show_tx == 0 and show_rx == 0:
|
||
|
show_tx = 1
|
||
|
show_rx = 1
|
||
|
|
||
|
def trace_end():
|
||
|
# order all events in time
|
||
|
all_event_list.sort(lambda a,b :cmp(a[EINFO_IDX_TIME],
|
||
|
b[EINFO_IDX_TIME]))
|
||
|
# process all events
|
||
|
for i in range(len(all_event_list)):
|
||
|
event_info = all_event_list[i]
|
||
|
name = event_info[EINFO_IDX_NAME]
|
||
|
if name == 'irq__softirq_exit':
|
||
|
handle_irq_softirq_exit(event_info)
|
||
|
elif name == 'irq__softirq_entry':
|
||
|
handle_irq_softirq_entry(event_info)
|
||
|
elif name == 'irq__softirq_raise':
|
||
|
handle_irq_softirq_raise(event_info)
|
||
|
elif name == 'irq__irq_handler_entry':
|
||
|
handle_irq_handler_entry(event_info)
|
||
|
elif name == 'irq__irq_handler_exit':
|
||
|
handle_irq_handler_exit(event_info)
|
||
|
elif name == 'napi__napi_poll':
|
||
|
handle_napi_poll(event_info)
|
||
|
elif name == 'net__netif_receive_skb':
|
||
|
handle_netif_receive_skb(event_info)
|
||
|
elif name == 'net__netif_rx':
|
||
|
handle_netif_rx(event_info)
|
||
|
elif name == 'skb__skb_copy_datagram_iovec':
|
||
|
handle_skb_copy_datagram_iovec(event_info)
|
||
|
elif name == 'net__net_dev_queue':
|
||
|
handle_net_dev_queue(event_info)
|
||
|
elif name == 'net__net_dev_xmit':
|
||
|
handle_net_dev_xmit(event_info)
|
||
|
elif name == 'skb__kfree_skb':
|
||
|
handle_kfree_skb(event_info)
|
||
|
elif name == 'skb__consume_skb':
|
||
|
handle_consume_skb(event_info)
|
||
|
# display receive hunks
|
||
|
if show_rx:
|
||
|
for i in range(len(receive_hunk_list)):
|
||
|
print_receive(receive_hunk_list[i])
|
||
|
# display transmit hunks
|
||
|
if show_tx:
|
||
|
print " dev len Qdisc " \
|
||
|
" netdevice free"
|
||
|
for i in range(len(tx_free_list)):
|
||
|
print_transmit(tx_free_list[i])
|
||
|
if debug:
|
||
|
print "debug buffer status"
|
||
|
print "----------------------------"
|
||
|
print "xmit Qdisc:remain:%d overflow:%d" % \
|
||
|
(len(tx_queue_list), of_count_tx_queue_list)
|
||
|
print "xmit netdevice:remain:%d overflow:%d" % \
|
||
|
(len(tx_xmit_list), of_count_tx_xmit_list)
|
||
|
print "receive:remain:%d overflow:%d" % \
|
||
|
(len(rx_skb_list), of_count_rx_skb_list)
|
||
|
|
||
|
# called from perf, when it finds a correspoinding event
|
||
|
def irq__softirq_entry(name, context, cpu, sec, nsec, pid, comm, vec):
|
||
|
if symbol_str("irq__softirq_entry", "vec", vec) != "NET_RX":
|
||
|
return
|
||
|
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec)
|
||
|
all_event_list.append(event_info)
|
||
|
|
||
|
def irq__softirq_exit(name, context, cpu, sec, nsec, pid, comm, vec):
|
||
|
if symbol_str("irq__softirq_entry", "vec", vec) != "NET_RX":
|
||
|
return
|
||
|
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec)
|
||
|
all_event_list.append(event_info)
|
||
|
|
||
|
def irq__softirq_raise(name, context, cpu, sec, nsec, pid, comm, vec):
|
||
|
if symbol_str("irq__softirq_entry", "vec", vec) != "NET_RX":
|
||
|
return
|
||
|
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec)
|
||
|
all_event_list.append(event_info)
|
||
|
|
||
|
def irq__irq_handler_entry(name, context, cpu, sec, nsec, pid, comm,
|
||
|
irq, irq_name):
|
||
|
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
|
||
|
irq, irq_name)
|
||
|
all_event_list.append(event_info)
|
||
|
|
||
|
def irq__irq_handler_exit(name, context, cpu, sec, nsec, pid, comm, irq, ret):
|
||
|
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, irq, ret)
|
||
|
all_event_list.append(event_info)
|
||
|
|
||
|
def napi__napi_poll(name, context, cpu, sec, nsec, pid, comm, napi, dev_name):
|
||
|
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
|
||
|
napi, dev_name)
|
||
|
all_event_list.append(event_info)
|
||
|
|
||
|
def net__netif_receive_skb(name, context, cpu, sec, nsec, pid, comm, skbaddr,
|
||
|
skblen, dev_name):
|
||
|
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
|
||
|
skbaddr, skblen, dev_name)
|
||
|
all_event_list.append(event_info)
|
||
|
|
||
|
def net__netif_rx(name, context, cpu, sec, nsec, pid, comm, skbaddr,
|
||
|
skblen, dev_name):
|
||
|
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
|
||
|
skbaddr, skblen, dev_name)
|
||
|
all_event_list.append(event_info)
|
||
|
|
||
|
def net__net_dev_queue(name, context, cpu, sec, nsec, pid, comm,
|
||
|
skbaddr, skblen, dev_name):
|
||
|
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
|
||
|
skbaddr, skblen, dev_name)
|
||
|
all_event_list.append(event_info)
|
||
|
|
||
|
def net__net_dev_xmit(name, context, cpu, sec, nsec, pid, comm,
|
||
|
skbaddr, skblen, rc, dev_name):
|
||
|
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
|
||
|
skbaddr, skblen, rc ,dev_name)
|
||
|
all_event_list.append(event_info)
|
||
|
|
||
|
def skb__kfree_skb(name, context, cpu, sec, nsec, pid, comm,
|
||
|
skbaddr, protocol, location):
|
||
|
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
|
||
|
skbaddr, protocol, location)
|
||
|
all_event_list.append(event_info)
|
||
|
|
||
|
def skb__consume_skb(name, context, cpu, sec, nsec, pid, comm, skbaddr):
|
||
|
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
|
||
|
skbaddr)
|
||
|
all_event_list.append(event_info)
|
||
|
|
||
|
def skb__skb_copy_datagram_iovec(name, context, cpu, sec, nsec, pid, comm,
|
||
|
skbaddr, skblen):
|
||
|
event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
|
||
|
skbaddr, skblen)
|
||
|
all_event_list.append(event_info)
|
||
|
|
||
|
def handle_irq_handler_entry(event_info):
|
||
|
(name, context, cpu, time, pid, comm, irq, irq_name) = event_info
|
||
|
if cpu not in irq_dic.keys():
|
||
|
irq_dic[cpu] = []
|
||
|
irq_record = {'irq':irq, 'name':irq_name, 'cpu':cpu, 'irq_ent_t':time}
|
||
|
irq_dic[cpu].append(irq_record)
|
||
|
|
||
|
def handle_irq_handler_exit(event_info):
|
||
|
(name, context, cpu, time, pid, comm, irq, ret) = event_info
|
||
|
if cpu not in irq_dic.keys():
|
||
|
return
|
||
|
irq_record = irq_dic[cpu].pop()
|
||
|
if irq != irq_record['irq']:
|
||
|
return
|
||
|
irq_record.update({'irq_ext_t':time})
|
||
|
# if an irq doesn't include NET_RX softirq, drop.
|
||
|
if 'event_list' in irq_record.keys():
|
||
|
irq_dic[cpu].append(irq_record)
|
||
|
|
||
|
def handle_irq_softirq_raise(event_info):
|
||
|
(name, context, cpu, time, pid, comm, vec) = event_info
|
||
|
if cpu not in irq_dic.keys() \
|
||
|
or len(irq_dic[cpu]) == 0:
|
||
|
return
|
||
|
irq_record = irq_dic[cpu].pop()
|
||
|
if 'event_list' in irq_record.keys():
|
||
|
irq_event_list = irq_record['event_list']
|
||
|
else:
|
||
|
irq_event_list = []
|
||
|
irq_event_list.append({'time':time, 'event':'sirq_raise'})
|
||
|
irq_record.update({'event_list':irq_event_list})
|
||
|
irq_dic[cpu].append(irq_record)
|
||
|
|
||
|
def handle_irq_softirq_entry(event_info):
|
||
|
(name, context, cpu, time, pid, comm, vec) = event_info
|
||
|
net_rx_dic[cpu] = {'sirq_ent_t':time, 'event_list':[]}
|
||
|
|
||
|
def handle_irq_softirq_exit(event_info):
|
||
|
(name, context, cpu, time, pid, comm, vec) = event_info
|
||
|
irq_list = []
|
||
|
event_list = 0
|
||
|
if cpu in irq_dic.keys():
|
||
|
irq_list = irq_dic[cpu]
|
||
|
del irq_dic[cpu]
|
||
|
if cpu in net_rx_dic.keys():
|
||
|
sirq_ent_t = net_rx_dic[cpu]['sirq_ent_t']
|
||
|
event_list = net_rx_dic[cpu]['event_list']
|
||
|
del net_rx_dic[cpu]
|
||
|
if irq_list == [] or event_list == 0:
|
||
|
return
|
||
|
rec_data = {'sirq_ent_t':sirq_ent_t, 'sirq_ext_t':time,
|
||
|
'irq_list':irq_list, 'event_list':event_list}
|
||
|
# merge information realted to a NET_RX softirq
|
||
|
receive_hunk_list.append(rec_data)
|
||
|
|
||
|
def handle_napi_poll(event_info):
|
||
|
(name, context, cpu, time, pid, comm, napi, dev_name) = event_info
|
||
|
if cpu in net_rx_dic.keys():
|
||
|
event_list = net_rx_dic[cpu]['event_list']
|
||
|
rec_data = {'event_name':'napi_poll',
|
||
|
'dev':dev_name, 'event_t':time}
|
||
|
event_list.append(rec_data)
|
||
|
|
||
|
def handle_netif_rx(event_info):
|
||
|
(name, context, cpu, time, pid, comm,
|
||
|
skbaddr, skblen, dev_name) = event_info
|
||
|
if cpu not in irq_dic.keys() \
|
||
|
or len(irq_dic[cpu]) == 0:
|
||
|
return
|
||
|
irq_record = irq_dic[cpu].pop()
|
||
|
if 'event_list' in irq_record.keys():
|
||
|
irq_event_list = irq_record['event_list']
|
||
|
else:
|
||
|
irq_event_list = []
|
||
|
irq_event_list.append({'time':time, 'event':'netif_rx',
|
||
|
'skbaddr':skbaddr, 'skblen':skblen, 'dev_name':dev_name})
|
||
|
irq_record.update({'event_list':irq_event_list})
|
||
|
irq_dic[cpu].append(irq_record)
|
||
|
|
||
|
def handle_netif_receive_skb(event_info):
|
||
|
global of_count_rx_skb_list
|
||
|
|
||
|
(name, context, cpu, time, pid, comm,
|
||
|
skbaddr, skblen, dev_name) = event_info
|
||
|
if cpu in net_rx_dic.keys():
|
||
|
rec_data = {'event_name':'netif_receive_skb',
|
||
|
'event_t':time, 'skbaddr':skbaddr, 'len':skblen}
|
||
|
event_list = net_rx_dic[cpu]['event_list']
|
||
|
event_list.append(rec_data)
|
||
|
rx_skb_list.insert(0, rec_data)
|
||
|
if len(rx_skb_list) > buffer_budget:
|
||
|
rx_skb_list.pop()
|
||
|
of_count_rx_skb_list += 1
|
||
|
|
||
|
def handle_net_dev_queue(event_info):
|
||
|
global of_count_tx_queue_list
|
||
|
|
||
|
(name, context, cpu, time, pid, comm,
|
||
|
skbaddr, skblen, dev_name) = event_info
|
||
|
skb = {'dev':dev_name, 'skbaddr':skbaddr, 'len':skblen, 'queue_t':time}
|
||
|
tx_queue_list.insert(0, skb)
|
||
|
if len(tx_queue_list) > buffer_budget:
|
||
|
tx_queue_list.pop()
|
||
|
of_count_tx_queue_list += 1
|
||
|
|
||
|
def handle_net_dev_xmit(event_info):
|
||
|
global of_count_tx_xmit_list
|
||
|
|
||
|
(name, context, cpu, time, pid, comm,
|
||
|
skbaddr, skblen, rc, dev_name) = event_info
|
||
|
if rc == 0: # NETDEV_TX_OK
|
||
|
for i in range(len(tx_queue_list)):
|
||
|
skb = tx_queue_list[i]
|
||
|
if skb['skbaddr'] == skbaddr:
|
||
|
skb['xmit_t'] = time
|
||
|
tx_xmit_list.insert(0, skb)
|
||
|
del tx_queue_list[i]
|
||
|
if len(tx_xmit_list) > buffer_budget:
|
||
|
tx_xmit_list.pop()
|
||
|
of_count_tx_xmit_list += 1
|
||
|
return
|
||
|
|
||
|
def handle_kfree_skb(event_info):
|
||
|
(name, context, cpu, time, pid, comm,
|
||
|
skbaddr, protocol, location) = event_info
|
||
|
for i in range(len(tx_queue_list)):
|
||
|
skb = tx_queue_list[i]
|
||
|
if skb['skbaddr'] == skbaddr:
|
||
|
del tx_queue_list[i]
|
||
|
return
|
||
|
for i in range(len(tx_xmit_list)):
|
||
|
skb = tx_xmit_list[i]
|
||
|
if skb['skbaddr'] == skbaddr:
|
||
|
skb['free_t'] = time
|
||
|
tx_free_list.append(skb)
|
||
|
del tx_xmit_list[i]
|
||
|
return
|
||
|
for i in range(len(rx_skb_list)):
|
||
|
rec_data = rx_skb_list[i]
|
||
|
if rec_data['skbaddr'] == skbaddr:
|
||
|
rec_data.update({'handle':"kfree_skb",
|
||
|
'comm':comm, 'pid':pid, 'comm_t':time})
|
||
|
del rx_skb_list[i]
|
||
|
return
|
||
|
|
||
|
def handle_consume_skb(event_info):
|
||
|
(name, context, cpu, time, pid, comm, skbaddr) = event_info
|
||
|
for i in range(len(tx_xmit_list)):
|
||
|
skb = tx_xmit_list[i]
|
||
|
if skb['skbaddr'] == skbaddr:
|
||
|
skb['free_t'] = time
|
||
|
tx_free_list.append(skb)
|
||
|
del tx_xmit_list[i]
|
||
|
return
|
||
|
|
||
|
def handle_skb_copy_datagram_iovec(event_info):
|
||
|
(name, context, cpu, time, pid, comm, skbaddr, skblen) = event_info
|
||
|
for i in range(len(rx_skb_list)):
|
||
|
rec_data = rx_skb_list[i]
|
||
|
if skbaddr == rec_data['skbaddr']:
|
||
|
rec_data.update({'handle':"skb_copy_datagram_iovec",
|
||
|
'comm':comm, 'pid':pid, 'comm_t':time})
|
||
|
del rx_skb_list[i]
|
||
|
return
|