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472 lines
15 KiB
472 lines
15 KiB
# Display a process of packets and processed time. |
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# SPDX-License-Identifier: GPL-2.0 |
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# It helps us to investigate networking or network device. |
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# |
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# options |
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# tx: show only tx chart |
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# rx: show only rx chart |
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# dev=: show only thing related to specified device |
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# debug: work with debug mode. It shows buffer status. |
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|
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from __future__ import print_function |
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|
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import os |
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import sys |
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|
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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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|
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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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from functools import cmp_to_key |
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|
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all_event_list = []; # insert all tracepoint event related with this script |
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irq_dic = {}; # key is cpu and value is a list which stacks irqs |
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# which raise NET_RX softirq |
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net_rx_dic = {}; # key is cpu and value include time of NET_RX softirq-entry |
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# and a list which stacks receive |
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receive_hunk_list = []; # a list which include a sequence of receive events |
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rx_skb_list = []; # received packet list for matching |
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# skb_copy_datagram_iovec |
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buffer_budget = 65536; # the budget of rx_skb_list, tx_queue_list and |
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# tx_xmit_list |
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of_count_rx_skb_list = 0; # overflow count |
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tx_queue_list = []; # list of packets which pass through dev_queue_xmit |
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of_count_tx_queue_list = 0; # overflow count |
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tx_xmit_list = []; # list of packets which pass through dev_hard_start_xmit |
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of_count_tx_xmit_list = 0; # overflow count |
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tx_free_list = []; # list of packets which is freed |
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|
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# options |
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show_tx = 0; |
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show_rx = 0; |
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dev = 0; # store a name of device specified by option "dev=" |
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debug = 0; |
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|
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# indices of event_info tuple |
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EINFO_IDX_NAME= 0 |
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EINFO_IDX_CONTEXT=1 |
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EINFO_IDX_CPU= 2 |
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EINFO_IDX_TIME= 3 |
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EINFO_IDX_PID= 4 |
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EINFO_IDX_COMM= 5 |
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|
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# Calculate a time interval(msec) from src(nsec) to dst(nsec) |
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def diff_msec(src, dst): |
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return (dst - src) / 1000000.0 |
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|
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# Display a process of transmitting a packet |
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def print_transmit(hunk): |
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if dev != 0 and hunk['dev'].find(dev) < 0: |
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return |
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print("%7s %5d %6d.%06dsec %12.3fmsec %12.3fmsec" % |
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(hunk['dev'], hunk['len'], |
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nsecs_secs(hunk['queue_t']), |
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nsecs_nsecs(hunk['queue_t'])/1000, |
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diff_msec(hunk['queue_t'], hunk['xmit_t']), |
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diff_msec(hunk['xmit_t'], hunk['free_t']))) |
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# Format for displaying rx packet processing |
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PF_IRQ_ENTRY= " irq_entry(+%.3fmsec irq=%d:%s)" |
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PF_SOFT_ENTRY=" softirq_entry(+%.3fmsec)" |
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PF_NAPI_POLL= " napi_poll_exit(+%.3fmsec %s)" |
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PF_JOINT= " |" |
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PF_WJOINT= " | |" |
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PF_NET_RECV= " |---netif_receive_skb(+%.3fmsec skb=%x len=%d)" |
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PF_NET_RX= " |---netif_rx(+%.3fmsec skb=%x)" |
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PF_CPY_DGRAM= " | skb_copy_datagram_iovec(+%.3fmsec %d:%s)" |
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PF_KFREE_SKB= " | kfree_skb(+%.3fmsec location=%x)" |
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PF_CONS_SKB= " | consume_skb(+%.3fmsec)" |
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|
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# Display a process of received packets and interrputs associated with |
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# a NET_RX softirq |
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def print_receive(hunk): |
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show_hunk = 0 |
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irq_list = hunk['irq_list'] |
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cpu = irq_list[0]['cpu'] |
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base_t = irq_list[0]['irq_ent_t'] |
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# check if this hunk should be showed |
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if dev != 0: |
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for i in range(len(irq_list)): |
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if irq_list[i]['name'].find(dev) >= 0: |
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show_hunk = 1 |
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break |
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else: |
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show_hunk = 1 |
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if show_hunk == 0: |
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return |
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print("%d.%06dsec cpu=%d" % |
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(nsecs_secs(base_t), nsecs_nsecs(base_t)/1000, cpu)) |
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for i in range(len(irq_list)): |
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print(PF_IRQ_ENTRY % |
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(diff_msec(base_t, irq_list[i]['irq_ent_t']), |
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irq_list[i]['irq'], irq_list[i]['name'])) |
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print(PF_JOINT) |
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irq_event_list = irq_list[i]['event_list'] |
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for j in range(len(irq_event_list)): |
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irq_event = irq_event_list[j] |
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if irq_event['event'] == 'netif_rx': |
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print(PF_NET_RX % |
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(diff_msec(base_t, irq_event['time']), |
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irq_event['skbaddr'])) |
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print(PF_JOINT) |
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print(PF_SOFT_ENTRY % |
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diff_msec(base_t, hunk['sirq_ent_t'])) |
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print(PF_JOINT) |
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event_list = hunk['event_list'] |
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for i in range(len(event_list)): |
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event = event_list[i] |
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if event['event_name'] == 'napi_poll': |
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print(PF_NAPI_POLL % |
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(diff_msec(base_t, event['event_t']), |
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event['dev'])) |
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if i == len(event_list) - 1: |
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print("") |
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else: |
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print(PF_JOINT) |
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else: |
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print(PF_NET_RECV % |
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(diff_msec(base_t, event['event_t']), |
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event['skbaddr'], |
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event['len'])) |
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if 'comm' in event.keys(): |
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print(PF_WJOINT) |
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print(PF_CPY_DGRAM % |
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(diff_msec(base_t, event['comm_t']), |
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event['pid'], event['comm'])) |
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elif 'handle' in event.keys(): |
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print(PF_WJOINT) |
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if event['handle'] == "kfree_skb": |
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print(PF_KFREE_SKB % |
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(diff_msec(base_t, |
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event['comm_t']), |
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event['location'])) |
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elif event['handle'] == "consume_skb": |
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print(PF_CONS_SKB % |
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diff_msec(base_t, |
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event['comm_t'])) |
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print(PF_JOINT) |
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def trace_begin(): |
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global show_tx |
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global show_rx |
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global dev |
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global debug |
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for i in range(len(sys.argv)): |
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if i == 0: |
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continue |
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arg = sys.argv[i] |
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if arg == 'tx': |
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show_tx = 1 |
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elif arg =='rx': |
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show_rx = 1 |
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elif arg.find('dev=',0, 4) >= 0: |
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dev = arg[4:] |
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elif arg == 'debug': |
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debug = 1 |
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if show_tx == 0 and show_rx == 0: |
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show_tx = 1 |
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show_rx = 1 |
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def trace_end(): |
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# order all events in time |
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all_event_list.sort(key=cmp_to_key(lambda a,b :a[EINFO_IDX_TIME] < b[EINFO_IDX_TIME])) |
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# process all events |
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for i in range(len(all_event_list)): |
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event_info = all_event_list[i] |
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name = event_info[EINFO_IDX_NAME] |
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if name == 'irq__softirq_exit': |
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handle_irq_softirq_exit(event_info) |
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elif name == 'irq__softirq_entry': |
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handle_irq_softirq_entry(event_info) |
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elif name == 'irq__softirq_raise': |
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handle_irq_softirq_raise(event_info) |
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elif name == 'irq__irq_handler_entry': |
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handle_irq_handler_entry(event_info) |
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elif name == 'irq__irq_handler_exit': |
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handle_irq_handler_exit(event_info) |
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elif name == 'napi__napi_poll': |
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handle_napi_poll(event_info) |
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elif name == 'net__netif_receive_skb': |
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handle_netif_receive_skb(event_info) |
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elif name == 'net__netif_rx': |
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handle_netif_rx(event_info) |
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elif name == 'skb__skb_copy_datagram_iovec': |
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handle_skb_copy_datagram_iovec(event_info) |
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elif name == 'net__net_dev_queue': |
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handle_net_dev_queue(event_info) |
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elif name == 'net__net_dev_xmit': |
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handle_net_dev_xmit(event_info) |
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elif name == 'skb__kfree_skb': |
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handle_kfree_skb(event_info) |
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elif name == 'skb__consume_skb': |
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handle_consume_skb(event_info) |
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# display receive hunks |
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if show_rx: |
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for i in range(len(receive_hunk_list)): |
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print_receive(receive_hunk_list[i]) |
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# display transmit hunks |
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if show_tx: |
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print(" dev len Qdisc " |
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" netdevice free") |
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for i in range(len(tx_free_list)): |
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print_transmit(tx_free_list[i]) |
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if debug: |
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print("debug buffer status") |
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print("----------------------------") |
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print("xmit Qdisc:remain:%d overflow:%d" % |
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(len(tx_queue_list), of_count_tx_queue_list)) |
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print("xmit netdevice:remain:%d overflow:%d" % |
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(len(tx_xmit_list), of_count_tx_xmit_list)) |
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print("receive:remain:%d overflow:%d" % |
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(len(rx_skb_list), of_count_rx_skb_list)) |
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# called from perf, when it finds a correspoinding event |
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def irq__softirq_entry(name, context, cpu, sec, nsec, pid, comm, callchain, vec): |
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if symbol_str("irq__softirq_entry", "vec", vec) != "NET_RX": |
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return |
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event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec) |
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all_event_list.append(event_info) |
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def irq__softirq_exit(name, context, cpu, sec, nsec, pid, comm, callchain, vec): |
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if symbol_str("irq__softirq_entry", "vec", vec) != "NET_RX": |
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return |
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event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec) |
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all_event_list.append(event_info) |
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def irq__softirq_raise(name, context, cpu, sec, nsec, pid, comm, callchain, vec): |
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if symbol_str("irq__softirq_entry", "vec", vec) != "NET_RX": |
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return |
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event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec) |
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all_event_list.append(event_info) |
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def irq__irq_handler_entry(name, context, cpu, sec, nsec, pid, comm, |
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callchain, irq, irq_name): |
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event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, |
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irq, irq_name) |
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all_event_list.append(event_info) |
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def irq__irq_handler_exit(name, context, cpu, sec, nsec, pid, comm, callchain, irq, ret): |
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event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, irq, ret) |
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all_event_list.append(event_info) |
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def napi__napi_poll(name, context, cpu, sec, nsec, pid, comm, callchain, napi, |
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dev_name, work=None, budget=None): |
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event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, |
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napi, dev_name, work, budget) |
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all_event_list.append(event_info) |
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def net__netif_receive_skb(name, context, cpu, sec, nsec, pid, comm, callchain, skbaddr, |
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skblen, dev_name): |
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event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, |
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skbaddr, skblen, dev_name) |
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all_event_list.append(event_info) |
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def net__netif_rx(name, context, cpu, sec, nsec, pid, comm, callchain, skbaddr, |
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skblen, dev_name): |
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event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, |
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skbaddr, skblen, dev_name) |
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all_event_list.append(event_info) |
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def net__net_dev_queue(name, context, cpu, sec, nsec, pid, comm, callchain, |
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skbaddr, skblen, dev_name): |
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event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, |
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skbaddr, skblen, dev_name) |
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all_event_list.append(event_info) |
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def net__net_dev_xmit(name, context, cpu, sec, nsec, pid, comm, callchain, |
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skbaddr, skblen, rc, dev_name): |
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event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, |
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skbaddr, skblen, rc ,dev_name) |
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all_event_list.append(event_info) |
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def skb__kfree_skb(name, context, cpu, sec, nsec, pid, comm, callchain, |
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skbaddr, protocol, location): |
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event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, |
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skbaddr, protocol, location) |
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all_event_list.append(event_info) |
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def skb__consume_skb(name, context, cpu, sec, nsec, pid, comm, callchain, skbaddr): |
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event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, |
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skbaddr) |
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all_event_list.append(event_info) |
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def skb__skb_copy_datagram_iovec(name, context, cpu, sec, nsec, pid, comm, callchain, |
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skbaddr, skblen): |
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event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, |
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skbaddr, skblen) |
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all_event_list.append(event_info) |
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def handle_irq_handler_entry(event_info): |
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(name, context, cpu, time, pid, comm, irq, irq_name) = event_info |
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if cpu not in irq_dic.keys(): |
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irq_dic[cpu] = [] |
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irq_record = {'irq':irq, 'name':irq_name, 'cpu':cpu, 'irq_ent_t':time} |
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irq_dic[cpu].append(irq_record) |
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def handle_irq_handler_exit(event_info): |
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(name, context, cpu, time, pid, comm, irq, ret) = event_info |
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if cpu not in irq_dic.keys(): |
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return |
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irq_record = irq_dic[cpu].pop() |
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if irq != irq_record['irq']: |
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return |
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irq_record.update({'irq_ext_t':time}) |
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# if an irq doesn't include NET_RX softirq, drop. |
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if 'event_list' in irq_record.keys(): |
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irq_dic[cpu].append(irq_record) |
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|
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def handle_irq_softirq_raise(event_info): |
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(name, context, cpu, time, pid, comm, vec) = event_info |
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if cpu not in irq_dic.keys() \ |
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or len(irq_dic[cpu]) == 0: |
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return |
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irq_record = irq_dic[cpu].pop() |
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if 'event_list' in irq_record.keys(): |
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irq_event_list = irq_record['event_list'] |
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else: |
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irq_event_list = [] |
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irq_event_list.append({'time':time, 'event':'sirq_raise'}) |
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irq_record.update({'event_list':irq_event_list}) |
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irq_dic[cpu].append(irq_record) |
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def handle_irq_softirq_entry(event_info): |
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(name, context, cpu, time, pid, comm, vec) = event_info |
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net_rx_dic[cpu] = {'sirq_ent_t':time, 'event_list':[]} |
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def handle_irq_softirq_exit(event_info): |
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(name, context, cpu, time, pid, comm, vec) = event_info |
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irq_list = [] |
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event_list = 0 |
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if cpu in irq_dic.keys(): |
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irq_list = irq_dic[cpu] |
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del irq_dic[cpu] |
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if cpu in net_rx_dic.keys(): |
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sirq_ent_t = net_rx_dic[cpu]['sirq_ent_t'] |
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event_list = net_rx_dic[cpu]['event_list'] |
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del net_rx_dic[cpu] |
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if irq_list == [] or event_list == 0: |
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return |
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rec_data = {'sirq_ent_t':sirq_ent_t, 'sirq_ext_t':time, |
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'irq_list':irq_list, 'event_list':event_list} |
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# merge information realted to a NET_RX softirq |
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receive_hunk_list.append(rec_data) |
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def handle_napi_poll(event_info): |
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(name, context, cpu, time, pid, comm, napi, dev_name, |
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work, budget) = event_info |
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if cpu in net_rx_dic.keys(): |
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event_list = net_rx_dic[cpu]['event_list'] |
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rec_data = {'event_name':'napi_poll', |
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'dev':dev_name, 'event_t':time, |
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'work':work, 'budget':budget} |
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event_list.append(rec_data) |
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|
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def handle_netif_rx(event_info): |
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(name, context, cpu, time, pid, comm, |
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skbaddr, skblen, dev_name) = event_info |
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if cpu not in irq_dic.keys() \ |
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or len(irq_dic[cpu]) == 0: |
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return |
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irq_record = irq_dic[cpu].pop() |
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if 'event_list' in irq_record.keys(): |
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irq_event_list = irq_record['event_list'] |
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else: |
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irq_event_list = [] |
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irq_event_list.append({'time':time, 'event':'netif_rx', |
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'skbaddr':skbaddr, 'skblen':skblen, 'dev_name':dev_name}) |
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irq_record.update({'event_list':irq_event_list}) |
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irq_dic[cpu].append(irq_record) |
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|
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def handle_netif_receive_skb(event_info): |
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global of_count_rx_skb_list |
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|
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(name, context, cpu, time, pid, comm, |
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skbaddr, skblen, dev_name) = event_info |
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if cpu in net_rx_dic.keys(): |
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rec_data = {'event_name':'netif_receive_skb', |
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'event_t':time, 'skbaddr':skbaddr, 'len':skblen} |
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event_list = net_rx_dic[cpu]['event_list'] |
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event_list.append(rec_data) |
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rx_skb_list.insert(0, rec_data) |
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if len(rx_skb_list) > buffer_budget: |
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rx_skb_list.pop() |
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of_count_rx_skb_list += 1 |
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|
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def handle_net_dev_queue(event_info): |
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global of_count_tx_queue_list |
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|
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(name, context, cpu, time, pid, comm, |
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skbaddr, skblen, dev_name) = event_info |
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skb = {'dev':dev_name, 'skbaddr':skbaddr, 'len':skblen, 'queue_t':time} |
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tx_queue_list.insert(0, skb) |
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if len(tx_queue_list) > buffer_budget: |
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tx_queue_list.pop() |
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of_count_tx_queue_list += 1 |
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|
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def handle_net_dev_xmit(event_info): |
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global of_count_tx_xmit_list |
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|
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(name, context, cpu, time, pid, comm, |
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skbaddr, skblen, rc, dev_name) = event_info |
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if rc == 0: # NETDEV_TX_OK |
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for i in range(len(tx_queue_list)): |
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skb = tx_queue_list[i] |
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if skb['skbaddr'] == skbaddr: |
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skb['xmit_t'] = time |
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tx_xmit_list.insert(0, skb) |
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del tx_queue_list[i] |
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if len(tx_xmit_list) > buffer_budget: |
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tx_xmit_list.pop() |
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of_count_tx_xmit_list += 1 |
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return |
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|
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def handle_kfree_skb(event_info): |
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(name, context, cpu, time, pid, comm, |
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skbaddr, protocol, location) = event_info |
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for i in range(len(tx_queue_list)): |
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skb = tx_queue_list[i] |
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if skb['skbaddr'] == skbaddr: |
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del tx_queue_list[i] |
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return |
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for i in range(len(tx_xmit_list)): |
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skb = tx_xmit_list[i] |
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if skb['skbaddr'] == skbaddr: |
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skb['free_t'] = time |
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tx_free_list.append(skb) |
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del tx_xmit_list[i] |
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return |
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for i in range(len(rx_skb_list)): |
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rec_data = rx_skb_list[i] |
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if rec_data['skbaddr'] == skbaddr: |
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rec_data.update({'handle':"kfree_skb", |
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'comm':comm, 'pid':pid, 'comm_t':time}) |
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del rx_skb_list[i] |
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return |
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|
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def handle_consume_skb(event_info): |
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(name, context, cpu, time, pid, comm, skbaddr) = event_info |
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for i in range(len(tx_xmit_list)): |
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skb = tx_xmit_list[i] |
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if skb['skbaddr'] == skbaddr: |
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skb['free_t'] = time |
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tx_free_list.append(skb) |
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del tx_xmit_list[i] |
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return |
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|
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def handle_skb_copy_datagram_iovec(event_info): |
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(name, context, cpu, time, pid, comm, skbaddr, skblen) = event_info |
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for i in range(len(rx_skb_list)): |
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rec_data = rx_skb_list[i] |
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if skbaddr == rec_data['skbaddr']: |
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rec_data.update({'handle':"skb_copy_datagram_iovec", |
|
'comm':comm, 'pid':pid, 'comm_t':time}) |
|
del rx_skb_list[i] |
|
return
|
|
|