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List:       ntp-hackers
Subject:    [ntp:hackers] Clockstats - was Re:  GSOC: More logging requests
From:       tglassey <tglassey () glassey ! com>
Date:       2009-06-30 22:05:52
Message-ID: 4A4A8C40.10803 () glassey ! com
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Hal Murray wrote:
> I'm talking about clockstats now rather than syslog.
>   
Hal - can we adjust the title's so that these messages are more parsable 
without having to sort the actual content???

Todd
> I'm using the NMEA driver as an example because I'm familiar with it.  Other 
> drivers probably have similar opportunities.
>
> The NMEA driver gets a line of input every second.  Currently, it logs the 
> next one after it gets polled which is normally every 64 seconds.  That 
> mostly works out OK, but often I'd like more info.
>
> Each line contains a good/bad flag.  With normal logging, I only get to see 
> the last sample.  How many of the last 64 were good?
>
> One option would be a flag to log everything.
>
> Another option would be to put everything into shared memory where another 
> program could grab whatever it wants.
>
> Another option would be to count the good and bad lines and print those 
> counts by appending them to the next line that gets logged.  But there won't 
> be a next line if the cable has been unplugged so you have to handle the 
> no-input case too.
>
>
> NMEA has an interesting quirk in that you can setup most of them to give you 
> more info than you need for just timekeeping.  The log-everything and/or 
> shared memory could work well for that.  In this case, "everything" has two 
> meanings: all types of NMEA sentances vs all of a particular type (rather 
> than just one per poll interval).  So we probably want 2 flags.
>
>
>
>   
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