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UNIX DOMAIN SOCKET效率

时间:2018-12-27 23:10:24      阅读:261      评论:0      收藏:0      [点我收藏+]

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关于UNIX DOMAIN SOCKET和普通udp socket的对比
在TX1(4核A57 1.7GHz)的板卡上进行测试,每个包大小设置为1024,全速收发,UDS的速度在90Mbps左右,UDP在120Mbps左右(略有丢包)
CPU占用率,UDS比UDP低10%,但是实际上,如果码率相近时,CPU占用率是差不多的
 
下面是UDP的CPU占用:
top - 08:44:46 up  3:04,  5 users,  load average: 1.78, 1.70, 1.66
Threads: 195 total,   3 running, 192 sleeping,   0 stopped,   0 zombie
%Cpu(s): 15.4 us, 31.3 sy,  0.0 ni, 51.3 id,  0.0 wa,  0.0 hi,  2.1 si,  0.0 st
KiB Mem :  4078676 total,  3061964 free,   399460 used,   617252 buff/cache
KiB Swap:        0 total,        0 free,        0 used.  3180808 avail Mem
 
  PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ COMMAND
1397 root     -88   0  487920 156364   2100 R 65.9  3.8   2:04.03 udp_send
1396 root     -91   0  487920 156364   2100 R 56.3  3.8   1:48.16 udp_recv
1395 root      rt   0  487920 156364   2100 S 38.7  3.8   1:15.88 data_out
1398 root     -81   0  487920 156364   2100 S 29.8  3.8   0:58.27 data_in
  915 nvidia    20   0    9020   3280   2568 S  0.7  0.1   1:25.59 top
    7 root      20   0       0      0      0 S  0.3  0.0   0:43.18 rcu_preempt
  146 root      rt   0       0      0      0 S  0.3  0.0   0:26.44 cfinteractive
  327 systemd+  20   0   77312   1952   1740 S  0.3  0.0   0:06.22 sd-resolve
1393 root      20   0  487920 156364   2100 S  0.3  3.8   0:01.00 test_udp.out
1400 admin     20   0    8932   3304   2632 R  0.3  0.1   0:00.07 top
    1 root      20   0    7044   5452   3524 S  0.0  0.1   0:02.68 systemd
    2 root      20   0       0      0      0 S  0.0  0.0   0:00.00 kthreadd
    3 root      20   0       0      0      0 S  0.0  0.0   2:52.41 ksoftirqd/0
    5 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 kworker/0:0H
    8 root      20   0       0      0      0 S  0.0  0.0   0:00.00 rcu_sched
    9 root      20   0       0      0      0 S  0.0  0.0   0:00.00 rcu_bh
   10 root      rt   0       0      0      0 S  0.0  0.0   0:00.00 migration/0
   11 root      rt   0       0      0      0 S  0.0  0.0   0:00.22 watchdog/0
 

  

 这个是UDS的CPU占用率:
top - 08:45:22 up  3:05,  5 users,  load average: 1.64, 1.68, 1.65
Threads: 195 total,   1 running, 194 sleeping,   0 stopped,   0 zombie
%Cpu(s): 12.9 us, 28.2 sy,  0.0 ni, 58.9 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem :  4078676 total,  3061868 free,   399532 used,   617276 buff/cache
KiB Swap:        0 total,        0 free,        0 used.  3180712 avail Mem
 
  PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ COMMAND
1406 root     -88   0  487916 156400   2136 S 53.5  3.8   0:05.85 udp_send
1405 root     -91   0  487916 156400   2136 S 41.6  3.8   0:04.57 udp_recv
1407 root     -81   0  487916 156400   2136 S 34.0  3.8   0:03.77 data_in
1404 root      rt   0  487916 156400   2136 S 29.7  3.8   0:03.24 data_out
  915 nvidia    20   0    9020   3280   2568 S  0.7  0.1   1:25.79 top
1402 root      20   0  487916 156400   2136 S  0.7  3.8   0:00.41 test.out
  146 root      rt   0       0      0      0 S  0.3  0.0   0:26.49 cfinteractive
1400 admin     20   0    8932   3304   2632 R  0.3  0.1   0:00.27 top
1403 root      rt   0  487916 156400   2136 S  0.3  3.8   0:00.01 trace_tsk
    1 root      20   0    7044   5452   3524 S  0.0  0.1   0:02.68 systemd
    2 root      20   0       0      0      0 S  0.0  0.0   0:00.00 kthreadd
    3 root      20   0       0      0      0 S  0.0  0.0   2:52.41 ksoftirqd/0
    5 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 kworker/0:0H
    7 root      20   0       0      0      0 S  0.0  0.0   0:43.20 rcu_preempt
    8 root      20   0       0      0      0 S  0.0  0.0   0:00.00 rcu_sched
    9 root      20   0       0      0      0 S  0.0  0.0   0:00.00 rcu_bh
   10 root      rt   0       0      0      0 S  0.0  0.0   0:00.00 migration/0
   11 root      rt   0       0      0      0 S  0.0  0.0   0:00.22 watchdog/0
   12 root      rt   0       0      0      0 S  0.0  0.0   0:00.20 watchdog/1
   13 root      rt   0       0      0      0 S  0.0  0.0   0:00.00 migration/1
   14 root      20   0       0      0      0 S  0.0  0.0   0:00.29 ksoftirqd/1
   15 root      20   0       0      0      0 S  0.0  0.0   0:00.00 kworker/1:0
   16 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 kworker/1:0H
   17 root      rt   0       0      0      0 S  0.0  0.0   0:00.21 watchdog/2
   18 root      rt   0       0      0      0 S  0.0  0.0   0:00.00 migration/2
   19 root      20   0       0      0      0 S  0.0  0.0   0:00.20 ksoftirqd/2
   21 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 kworker/2:0H
   22 root      rt   0       0      0      0 S  0.0  0.0   0:00.22 watchdog/3
   23 root      rt   0       0      0      0 S  0.0  0.0   0:00.00 migration/3
   24 root      20   0       0      0      0 S  0.0  0.0   0:00.31 ksoftirqd/3
   26 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 kworker/3:0H

  

理论上UDS不经过协议栈,不用计算校验和,但是为什么实际UDP速度还要快一些,那么UDS存在的价值在哪?

UNIX DOMAIN SOCKET效率

标签:sch   6.2   emd   admin   free   trace   1.0   comm   cpu   

原文地址:https://www.cnblogs.com/djw316/p/10187451.html

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