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Support #23806

TLG Front end clock drift problems

Added by Dennis Nicklaus about 2 months ago. Updated about 1 month ago.

Status:
Feedback
Priority:
High
Category:
Front-end Issue
Start date:
12/26/2019
Due date:
% Done:

0%

Estimated time:
Duration:

Description

Have received reports of the clock drifting on the TLG frontend.
Denise told me that Rich did "something" on Dec. 24, but today the problem is persisting.
I note that TLG has
  • ld (1, 1, "vxworks_boot/v6.4/module/mv5500/sntpctod-latest.out");
and runs once at startup
  • todUpdateTime ("fecode-bd")
I ran (12:26, 12:30pm) this command, a standard way of requesting periodic clock resets
  • period 300, todUpdateTime,0

If you need to cancel that because it conflicts with Rich's method or whatever, it is just the task named "t1".

Also, I saw that TLG's startup script is "commented out" from auto-running, in that it is named as .login_tlgx in the boot params, but the real file is named .login_tlg. Is this intentional?


Related issues

Related to TCLK Infrastructure - Bug #23813: System time occasionally jumps ahead by a second when using IP-UCDAssigned12/30/2019

History

#1 Updated by Richard Neswold about 2 months ago

  • Status changed from New to Feedback

I ran (12:26, 12:30pm) this command, a standard way of requesting periodic clock resets

period 300, todUpdateTime, 0

We were going to do this very thing. TLGTST is running this periodic task and, when Linden gave the go-ahead, I was going to enable it on TLG.

Now Linden can see if the operational node is affected by periodic time updates. It should be noted that both Linden and I didn't think the system should be sensitive to these updates, but we were being conservative.

It should also be noted that this is a band-aid to the real problem which resides in the IP-UCD driver. This "fix" runs every 5 minutes so the time could be off for up to 5 minutes before getting corrected.

Also, I saw that TLG's startup script is "commented out" from auto-running, in that it is named as .login_tlgx in the boot params, but the real file is named .login_tlg. Is this intentional?

Yes. Charlie did this for some reason. Linden, could you append the reason so it's documented?

#2 Updated by Richard Neswold about 2 months ago

  • Related to Bug #23813: System time occasionally jumps ahead by a second when using IP-UCD added

#3 Updated by Richard Neswold about 1 month ago

  • Assignee changed from Dennis Nicklaus to Linden Carmichael

Waiting for feedback from Linden before closing.



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