On 02/16/2014 05:30 PM, Scott Talbert wrote: > On Sun, 16 Feb 2014, Phil Dibowitz wrote: > >>> I don't think that is strange. I think what happened in this case was - >>> we got busy and queued up five packets. Then we read all of them and got >>> caught up. So, at that point we're caught up and now blocking, waiting on >>> the read thread to wake us up. The next few packets are received while >>> we're waiting for them. But for some reason we still lost some. >> >> How did we pop a 6th packet off of the queue if we never queued one? > > I don't know exactly where all your debug statements are to be able to > tell exactly what is going on. My assumption was that, after the 5th > packet, we were in the situation where the the thread doing > hid_read_timeout() was waiting on the one reading the packets, so the > queue never got bigger than one.
Yeah, but even if we were in hid_read_timeout() when the packet comes in, we'd still get an interrupt, jump into hid_report_callback(), pop it on the queue, and then return so hid_read_timeout() could then return. Or at least that's how I parse the code. >> It's unclear to me what the solution here is... it seems like they're saying >> have another thread that just constantly reads, i.e., "be faster" ? > > It wasn't clear to me that there actually *is* a solution. I don't know > what else the Run Loop is doing besides calling hid_report_callback when > it needs to. I feel like we're missing something. There's a solution *somewhere* or USB would just fail miserably on Macs... -- Phil Dibowitz p...@ipom.com Open Source software and tech docs Insanity Palace of Metallica http://www.phildev.net/ http://www.ipom.com/ "Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind." - Dr. Seuss
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