Extremely slow Petrel import + crash when saving

Henrik Brautaset Aronsen subsurface at henrik.synth.no
Thu Sep 19 10:45:52 UTC 2013

Jef Driesen wrote:
> When I analyze the logfile, I see a repeating pattern. There is always 
> a number of write's (to send a request to the device) followed by a 
> number of read's (the receive the response packet). The read sequence 
> is always very fast, in the order of just a few milliseconds for the 
> entire packet. But writing appears to be terrible slow, with about 1.5 
> seconds for just a few bytes.
> Look for example at the first dive (lines 3594 to 7560). It has a 
> (compressed) size of only 3460 bytes but takes approximately 47 
> seconds to download. Since the data is send in packets of 144 bytes, 
> there are 24 data packets (and two more for the init/quit packets). 
> Thus of those 47 seconds, roughly 39 seconds (26 times 1.5s) are spend 
> sending requests!
> I wonder if this is some platform or driver related issue. Can you try 
> the download on another platform (Windows or Linux) to check?

I got it running on an old Linux laptop, but when the download starts, 
the Petrel quits with "slip rx: unexp. slip end"


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