20.7. 验证时间同步

当 PTP 时间同步正常工作时，如果使用硬件时间戳，则定期将带有偏移和频率调整的新消息打印到 ptp4l 和 phc2sys 输出。输出值很快会聚合。您可以在 /var/log/messages 文件中看到这些消息。

以下是 ptp4l 和 phc2sys 输出示例：

偏移（以纳秒为单位）
频率偏移（以每十亿分之一为单位(ppb)）
路径延迟（以纳秒为单位）

ptp4l 输出示例：

Copy to Clipboard Toggle word wrap

ptp4l[352.359]: selected /dev/ptp0 as PTP clock
ptp4l[352.361]: port 1: INITIALIZING to LISTENING on INITIALIZE
ptp4l[352.361]: port 0: INITIALIZING to LISTENING on INITIALIZE
ptp4l[353.210]: port 1: new foreign master 00a069.fffe.0b552d-1
ptp4l[357.214]: selected best master clock 00a069.fffe.0b552d
ptp4l[357.214]: port 1: LISTENING to UNCALIBRATED on RS_SLAVE
ptp4l[359.224]: master offset    3304 s0 freq   +0 path delay   9202
ptp4l[360.224]: master offset    3708 s1 freq -29492 path delay   9202
ptp4l[361.224]: master offset   -3145 s2 freq -32637 path delay   9202
ptp4l[361.224]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
ptp4l[362.223]: master offset    -145 s2 freq -30580 path delay   9202
ptp4l[363.223]: master offset    1043 s2 freq -29436 path delay   8972
ptp4l[364.223]: master offset    266 s2 freq -29900 path delay   9153
ptp4l[365.223]: master offset    430 s2 freq -29656 path delay   9153
ptp4l[366.223]: master offset    615 s2 freq -29342 path delay   9169
ptp4l[367.222]: master offset    -191 s2 freq -29964 path delay   9169
ptp4l[368.223]: master offset    466 s2 freq -29364 path delay   9170
ptp4l[369.235]: master offset     24 s2 freq -29666 path delay   9196
ptp4l[370.235]: master offset    -375 s2 freq -30058 path delay   9238
ptp4l[371.235]: master offset    285 s2 freq -29511 path delay   9199
ptp4l[372.235]: master offset    -78 s2 freq -29788 path delay   9204

ptp4l[352.359]: selected /dev/ptp0 as PTP clock
ptp4l[352.361]: port 1: INITIALIZING to LISTENING on INITIALIZE
ptp4l[352.361]: port 0: INITIALIZING to LISTENING on INITIALIZE
ptp4l[353.210]: port 1: new foreign master 00a069.fffe.0b552d-1
ptp4l[357.214]: selected best master clock 00a069.fffe.0b552d
ptp4l[357.214]: port 1: LISTENING to UNCALIBRATED on RS_SLAVE
ptp4l[359.224]: master offset    3304 s0 freq   +0 path delay   9202
ptp4l[360.224]: master offset    3708 s1 freq -29492 path delay   9202
ptp4l[361.224]: master offset   -3145 s2 freq -32637 path delay   9202
ptp4l[361.224]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
ptp4l[362.223]: master offset    -145 s2 freq -30580 path delay   9202
ptp4l[363.223]: master offset    1043 s2 freq -29436 path delay   8972
ptp4l[364.223]: master offset    266 s2 freq -29900 path delay   9153
ptp4l[365.223]: master offset    430 s2 freq -29656 path delay   9153
ptp4l[366.223]: master offset    615 s2 freq -29342 path delay   9169
ptp4l[367.222]: master offset    -191 s2 freq -29964 path delay   9169
ptp4l[368.223]: master offset    466 s2 freq -29364 path delay   9170
ptp4l[369.235]: master offset     24 s2 freq -29666 path delay   9196
ptp4l[370.235]: master offset    -375 s2 freq -30058 path delay   9238
ptp4l[371.235]: master offset    285 s2 freq -29511 path delay   9199
ptp4l[372.235]: master offset    -78 s2 freq -29788 path delay   9204

phc2sys 输出示例：

Copy to Clipboard Toggle word wrap

phc2sys[526.527]: Waiting for ptp4l...
phc2sys[527.528]: Waiting for ptp4l...
phc2sys[528.528]: phc offset   55341 s0 freq   +0 delay  2729
phc2sys[529.528]: phc offset   54658 s1 freq -37690 delay  2725
phc2sys[530.528]: phc offset    888 s2 freq -36802 delay  2756
phc2sys[531.528]: phc offset   1156 s2 freq -36268 delay  2766
phc2sys[532.528]: phc offset    411 s2 freq -36666 delay  2738
phc2sys[533.528]: phc offset    -73 s2 freq -37026 delay  2764
phc2sys[534.528]: phc offset    39 s2 freq -36936 delay  2746
phc2sys[535.529]: phc offset    95 s2 freq -36869 delay  2733
phc2sys[536.529]: phc offset   -359 s2 freq -37294 delay  2738
phc2sys[537.529]: phc offset   -257 s2 freq -37300 delay  2753
phc2sys[538.529]: phc offset    119 s2 freq -37001 delay  2745
phc2sys[539.529]: phc offset    288 s2 freq -36796 delay  2766
phc2sys[540.529]: phc offset   -149 s2 freq -37147 delay  2760
phc2sys[541.529]: phc offset   -352 s2 freq -37395 delay  2771
phc2sys[542.529]: phc offset    166 s2 freq -36982 delay  2748
phc2sys[543.529]: phc offset    50 s2 freq -37048 delay  2756
phc2sys[544.530]: phc offset    -31 s2 freq -37114 delay  2748
phc2sys[545.530]: phc offset   -333 s2 freq -37426 delay  2747
phc2sys[546.530]: phc offset    194 s2 freq -36999 delay  2749

phc2sys[526.527]: Waiting for ptp4l...
phc2sys[527.528]: Waiting for ptp4l...
phc2sys[528.528]: phc offset   55341 s0 freq   +0 delay  2729
phc2sys[529.528]: phc offset   54658 s1 freq -37690 delay  2725
phc2sys[530.528]: phc offset    888 s2 freq -36802 delay  2756
phc2sys[531.528]: phc offset   1156 s2 freq -36268 delay  2766
phc2sys[532.528]: phc offset    411 s2 freq -36666 delay  2738
phc2sys[533.528]: phc offset    -73 s2 freq -37026 delay  2764
phc2sys[534.528]: phc offset    39 s2 freq -36936 delay  2746
phc2sys[535.529]: phc offset    95 s2 freq -36869 delay  2733
phc2sys[536.529]: phc offset   -359 s2 freq -37294 delay  2738
phc2sys[537.529]: phc offset   -257 s2 freq -37300 delay  2753
phc2sys[538.529]: phc offset    119 s2 freq -37001 delay  2745
phc2sys[539.529]: phc offset    288 s2 freq -36796 delay  2766
phc2sys[540.529]: phc offset   -149 s2 freq -37147 delay  2760
phc2sys[541.529]: phc offset   -352 s2 freq -37395 delay  2771
phc2sys[542.529]: phc offset    166 s2 freq -36982 delay  2748
phc2sys[543.529]: phc offset    50 s2 freq -37048 delay  2756
phc2sys[544.530]: phc offset    -31 s2 freq -37114 delay  2748
phc2sys[545.530]: phc offset   -333 s2 freq -37426 delay  2747
phc2sys[546.530]: phc offset    194 s2 freq -36999 delay  2749

要减少 ptp4l 输出并只打印值，请使用 summary_interval 指令。summary_interval 指令指定为 2，表示 n 的电源（以秒为单位）。例如，要将输出减少到每 1024 秒，请在 /etc/ptp4l.conf 文件中添加以下行：

Copy to Clipboard Toggle word wrap

summary_interval 10

summary_interval 10

ptp4l 输出示例，概述_interval 设置为 6：

Copy to Clipboard Toggle word wrap

ptp4l: [615.253] selected /dev/ptp0 as PTP clock
ptp4l: [615.255] port 1: INITIALIZING to LISTENING on INITIALIZE
ptp4l: [615.255] port 0: INITIALIZING to LISTENING on INITIALIZE
ptp4l: [615.564] port 1: new foreign master 00a069.fffe.0b552d-1
ptp4l: [619.574] selected best master clock 00a069.fffe.0b552d
ptp4l: [619.574] port 1: LISTENING to UNCALIBRATED on RS_SLAVE
ptp4l: [623.573] port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
ptp4l: [684.649] rms 669 max 3691 freq -29383 ± 3735 delay 9232 ± 122
ptp4l: [748.724] rms 253 max 588 freq -29787 ± 221 delay 9219 ± 158
ptp4l: [812.793] rms 287 max 673 freq -29802 ± 248 delay 9211 ± 183
ptp4l: [876.853] rms 226 max 534 freq -29795 ± 197 delay 9221 ± 138
ptp4l: [940.925] rms 250 max 562 freq -29801 ± 218 delay 9199 ± 148
ptp4l: [1004.988] rms 226 max 525 freq -29802 ± 196 delay 9228 ± 143
ptp4l: [1069.065] rms 300 max 646 freq -29802 ± 259 delay 9214 ± 176
ptp4l: [1133.125] rms 226 max 505 freq -29792 ± 197 delay 9225 ± 159
ptp4l: [1197.185] rms 244 max 688 freq -29790 ± 211 delay 9201 ± 162

ptp4l: [615.253] selected /dev/ptp0 as PTP clock
ptp4l: [615.255] port 1: INITIALIZING to LISTENING on INITIALIZE
ptp4l: [615.255] port 0: INITIALIZING to LISTENING on INITIALIZE
ptp4l: [615.564] port 1: new foreign master 00a069.fffe.0b552d-1
ptp4l: [619.574] selected best master clock 00a069.fffe.0b552d
ptp4l: [619.574] port 1: LISTENING to UNCALIBRATED on RS_SLAVE
ptp4l: [623.573] port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
ptp4l: [684.649] rms 669 max 3691 freq -29383 ± 3735 delay 9232 ± 122
ptp4l: [748.724] rms 253 max 588 freq -29787 ± 221 delay 9219 ± 158
ptp4l: [812.793] rms 287 max 673 freq -29802 ± 248 delay 9211 ± 183
ptp4l: [876.853] rms 226 max 534 freq -29795 ± 197 delay 9221 ± 138
ptp4l: [940.925] rms 250 max 562 freq -29801 ± 218 delay 9199 ± 148
ptp4l: [1004.988] rms 226 max 525 freq -29802 ± 196 delay 9228 ± 143
ptp4l: [1069.065] rms 300 max 646 freq -29802 ± 259 delay 9214 ± 176
ptp4l: [1133.125] rms 226 max 505 freq -29792 ± 197 delay 9225 ± 159
ptp4l: [1197.185] rms 244 max 688 freq -29790 ± 211 delay 9201 ± 162

默认情况下，summary_interval 设置为 0，因此每秒打印一次消息，这是最大频率。消息记录在 LOG_INFO 级别上。要禁用信息，请使用 -l 选项将最大日志级别设置为 5 或更低：

Copy to Clipboard Toggle word wrap

~]# phc2sys -l 5

~]# phc2sys -l 5

您可以使用 -u 选项来减少 phc2sys 输出：

Copy to Clipboard Toggle word wrap

~]# phc2sys -u summary-updates

~]# phc2sys -u summary-updates

其中 Summary-updates 是要包括在汇总统计中的时钟更新数。下面是一个示例：

Copy to Clipboard Toggle word wrap

~]# phc2sys -s eth3 -w -m -u 60
phc2sys[700.948]: rms 1837 max 10123 freq -36474 ± 4752 delay 2752 ± 16
phc2sys[760.954]: rms 194 max 457 freq -37084 ± 174 delay 2753 ± 12
phc2sys[820.963]: rms 211 max 487 freq -37085 ± 185 delay 2750 ± 19
phc2sys[880.968]: rms 183 max 440 freq -37102 ± 164 delay 2734 ± 91
phc2sys[940.973]: rms 244 max 584 freq -37095 ± 216 delay 2748 ± 16
phc2sys[1000.979]: rms 220 max 573 freq -36666 ± 182 delay 2747 ± 43
phc2sys[1060.984]: rms 266 max 675 freq -36759 ± 234 delay 2753 ± 17

~]# phc2sys -s eth3 -w -m -u 60
phc2sys[700.948]: rms 1837 max 10123 freq -36474 ± 4752 delay 2752 ± 16
phc2sys[760.954]: rms 194 max 457 freq -37084 ± 174 delay 2753 ± 12
phc2sys[820.963]: rms 211 max 487 freq -37085 ± 185 delay 2750 ± 19
phc2sys[880.968]: rms 183 max 440 freq -37102 ± 164 delay 2734 ± 91
phc2sys[940.973]: rms 244 max 584 freq -37095 ± 216 delay 2748 ± 16
phc2sys[1000.979]: rms 220 max 573 freq -36666 ± 182 delay 2747 ± 43
phc2sys[1060.984]: rms 266 max 675 freq -36759 ± 234 delay 2753 ± 17

与这些选项一起使用时，更新统计数据的时间间隔设置为 60 秒(-u)，ph c2sys 等待 ptp4l 处于同步状态(-w)，并将消息打印到标准输出(-m)。有关 phc2sys 选项的详情，请查看 phc2sys(5) man page。

输出包括：

偏移根平均值方块(rms)
最大绝对误差（最大值）
频率偏移(freq)：其平均值和标准偏差
路径延迟(delay)：其含义和标准偏差

返回顶部

20.7. 验证时间同步

学习

尝试、购买和销售

社区

关于红帽文档

让开源更具包容性

關於紅帽

Theme

Red Hat legal and privacy links

Red Hat legal and privacy links