ptpd2 running with 100% CPU on CentOS 7 machines

[Andy W. Clements]

I have a couple of x86_64 machines running CentOS 7 and ptpd2:

> uname -a
Linux <machinename> 3.10.0-693.11.6.el7.x86_64 #1 SMP Thu Jan 4 01:06:37 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
>ptpd2 -v
ptpd2 version 2.3.1-rc3

After running for a day or two, the ptpd2 instance start pegging the CPU at about 100%. Via top:

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                             
 1580 root      20   0   14016   1052    820 R 100.0  0.0  60:02.27 ptpd2  

Restarting them will have them go back to normal( < 1% CPU usage).

Not sure what I am doing wrong to have this situation. Here's the config file:

ptpengine:preset=slaveonly
ptpengine:interface=enp3s0
global:use_syslog=Y
global:log_status=Y
global:log_file="/var/log/ptpd2.log"
global:log_file_max_size=1000
global:log_file_max_files=5

The status file shows nothing unusual:

Interface          :  enp3s0
Preset             :  slaveonly
Transport          :  ipv4
IP mode            :  multicast
Delay mechanism    :  E2E
Sync mode          :  ONE_STEP
PTP domain         :  0
Port state         :  PTP_SLAVE
Local port ID      :  <hex value>(unknown)/01
Best master ID     :  <hex value>(unknown)/01
Best master IP     :  xxx.xxx.xxx.xxx
GM info            :  Priority1 128, Priority2 128, clockClass 248
Time properties    :  ARB timescale, traceable: time N, freq N
UTC properties     :  UTC valid: N, UTC offset: 0
Offset from Master : -0.000002447 s
One-way delay      :  0.000070875 s
Drift correction   :  43.420 ppm
Message rates      :  1/s sync, 1/s delay, 1/2s announce

Announce received  :  765
Sync received      :  1528
DelayReq sent      :  1607
DelayResp received :  1607
State transitions  :  3
PTP Engine resets  :  1

I can't see anything wrong in the log file either. Any ideas what is causing this run-away process?

Thanks in advance for your help.

[Wojciech Owczarek]

Hi - this was identified some time ago. PTPd is not maintained on SF anymore, pull the latest github source from https://github.com/ptpd/ptpd and you should not have this issue anymore.

Thanks,
Wojciech

[Andy W. Clements]

Thanks Wojciech. I will give this a shot. You folks do good work. Thanks for all your efforts!