Re: [Linuxptp-users] How do I use "slave_event_monitor" to get the management info(such as offset, delay, master time) which should from PMC.

[<957...@qq...>]

Thanks very much.
I also want to know how can I subscribe to receive PORT_DATA_SET and TIME_STATUS_NP via the push method? 
Could you help me some example and guidance? Thanks a lot.


"slave_event_monitor" must used with "delay_mechanism-E2E"? or both "E2E delay_mechanism" and "P2P delay_mechanism"  can use slave_event_monitor. 
As I see monitor_delay() is only called in  process_delay_resp() which is only called in case: DELAY_RESP, not in case: PDELAY_RESP.






------------------ Original ------------------
From: &nbsp;"Richard Cochran";<ric...@gm...&gt;;
Send time:&nbsp;Monday, Jun 20, 2022 9:54 PM
To:&nbsp;"这个🍊 不太冷"<957...@qq...&gt;; 
Cc:&nbsp;"linuxptp-users"<lin...@li...&gt;; 
Subject: &nbsp;Re: [Linuxptp-users] How do I use "slave_event_monitor" to get the management info(such as offset, delay, master time) which should from PMC.



On Mon, Jun 20, 2022 at 11:59:02AM +0800, 这个🍊 不太冷 wrote:
&gt; Thanks for your quick reply.
&gt; Q1.I have known the monitor socket should be created by the mointor, like PMC.
&gt; 
&gt; 
&gt; &amp;nbsp; &amp;nbsp; ptp4l --slave_event_monitor=/tmp/foo
&gt; &amp;nbsp; &amp;nbsp; pmc -u -i /tmp/foo

When I run those ^^^ commands, I see:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0019b8.fffe.09896d-0 seq 129 SIGNALING SLAVE_RX_SYNC_TIMING_DATA N 1 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; sourcePortIdentity&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a0369f.fffe.10cfaf-1
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; sequenceId&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 44565
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; syncOriginTimestamp&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1655732998.612437157
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; totalCorrectionField&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; scaledCumulativeRateOffset 0
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; syncEventIngressTimestamp&nbsp; 1655732998.612437752
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0019b8.fffe.09896d-0 seq 138 SIGNALING SLAVE_DELAY_TIMING_DATA_NP N 1 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; sourcePortIdentity&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a0369f.fffe.10cfaf-1
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; sequenceId&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 138
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; delayOriginTimestamp&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1655732998.628124923
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; totalCorrectionField&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; delayResponseTimestamp&nbsp;&nbsp;&nbsp;&nbsp; 1655732998.628125507
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0019b8.fffe.09896d-0 seq 130 SIGNALING SLAVE_RX_SYNC_TIMING_DATA N 1 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; sourcePortIdentity&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a0369f.fffe.10cfaf-1
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; sequenceId&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 44566
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; syncOriginTimestamp&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1655732999.612473029
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; totalCorrectionField&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; scaledCumulativeRateOffset 0
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; syncEventIngressTimestamp&nbsp; 1655732999.612473630

So it works!
Don't you see it working?

&gt; The ptp4l don't need to create a socket fd bind the
&gt; slave_event_monitor address, so how it send message to the local
&gt; address? It use the API raw_send() to achieve send the message to
&gt; the fd to PMC client? Socket&amp;nbsp; created only in&amp;nbsp; PMC, is it?

Read the code to find out how it works.

&gt; I'm now using v3.1, port.c line 1298 is not the implementation
&gt; code. Which version should I see.

Version v3.1
~~~~~~~~~~~~

&nbsp;&nbsp; 1176&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; switch (p-&gt;state) {
&nbsp;&nbsp; 1177&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; case PS_UNCALIBRATED:
&nbsp;&nbsp; 1178&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; case PS_SLAVE:
&nbsp;&nbsp; 1179&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; monitor_sync(p-&gt;slave_event_monitor,
&nbsp;&nbsp; 1180&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; clock_parent_identity(p-&gt;clock), seqid,
&nbsp;&nbsp; 1181&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; t1, tmv_add(c1, c2), t2);
&nbsp;&nbsp; 1182&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; break;
&nbsp;&nbsp; 1183&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; default:
&nbsp;&nbsp; 1184&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; break;
&nbsp;&nbsp; 1185&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }

HTH,
Richard