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SubjectRe: TTY loosing bytes ?
On Tue, Oct 06, 2009 at 03:42:09PM +0200, Balbi Felipe (Nokia-D/Helsinki) wrote:
> On Tue, Oct 06, 2009 at 03:40:12PM +0200, ext Alan Cox wrote:
> > > unfortunately it didn't work. Although now I don't the debugging prints
> > > complaining we've lost bytes, the transfer does get stuck in lot earlier
> > > stage.
> > >
> > > Maybe this is one fix but there's still other problem with that code ?
> >
> > Or with completely unrelated code. I guess you need to measure what goes
> > into receive_buf versus what appears in userspace
>
> will do it soonish. Thanks Alan, I'll return to you when I have more
> debugging.

ok, here we are. For some reason the host side seems that it just
stopped sending data to us:

> [ 177.413879] 37 37 37: read for 3 bytes
> [ 177.413909] 37 37 37: read actually 3 bytes (total 3)
> [ 177.413940] 37 37 37: read for 34 bytes
> [ 177.413940] 37 37 37: read actually 34 bytes (total 37)
> [ 177.414916] 37 37 37: write
> [ 177.416992] 40 40 40: read for 3 bytes
> [ 177.417022] 40 40 40: read actually 3 bytes (total 3)
> [ 177.417053] 40 40 40: read for 37 bytes
> [ 177.417053] 40 40 40: read actually 37 bytes (total 40)
> [ 178.115966] 40 40 40: write
> [ 178.116058] 0 0 0: write
> [ 178.175689] 19 19 19: read for 3 bytes
> [ 178.175720] 19 19 19: read actually 3 bytes (total 3)
> [ 178.175750] 19 19 19: read for 16 bytes
> [ 178.175781] 19 19 19: read actually 16 bytes (total 19)
> [ 178.175842] 19 19 19: write
> [ 180.784820] musb_hdrc periph: enabled ep1out for bulk OUT, maxpacket 512
> [ 180.784851] musb_hdrc periph: enabled ep1in for bulk IN, maxpacket 512
> [ 180.848358] musb_hdrc periph: enabled ep1out for bulk OUT, maxpacket 512
> [ 180.848388] musb_hdrc periph: enabled ep1in for bulk IN, maxpacket 512
> [ 186.659851] musb_hdrc periph: enabled ep2in for bulk IN, maxpacket 512
> [ 186.659912] musb_hdrc periph: enabled ep2out for bulk OUT, maxpacket 512
> [ 186.723907] musb_hdrc periph: enabled ep2in for bulk IN, maxpacket 512
> [ 186.723937] musb_hdrc periph: enabled ep2out for bulk OUT, maxpacket 512
> [ 186.848602] 37 37 37: read for 3 bytes
> [ 186.848632] 37 37 37: read actually 3 bytes (total 3)
> [ 186.848663] 37 37 37: read for 34 bytes
> [ 186.848663] 37 37 37: read actually 34 bytes (total 37)
> [ 186.849182] 37 37 37: write
> [ 186.852539] 40 40 40: read for 3 bytes
> [ 186.852569] 40 40 40: read actually 3 bytes (total 3)
> [ 186.852600] 40 40 40: read for 37 bytes
> [ 186.852630] 40 40 40: read actually 37 bytes (total 40)
> [ 187.435577] 40 40 40: write
> [ 187.435699] 0 0 0: write
> [ 187.644683] 47 47 47: read for 3 bytes
> [ 187.644714] 47 47 47: read actually 3 bytes (total 3)
> [ 187.644744] 47 47 47: read for 44 bytes
> [ 187.644775] 47 47 47: read actually 44 bytes (total 47)
> [ 187.648620] 47 47 47: write
> [ 192.939239] 24 24 24: read for 3 bytes
> [ 192.939300] 24 24 24: read actually 3 bytes (total 3)
> [ 192.939300] 24 24 24: read for 21 bytes
> [ 192.939331] 24 24 24: read actually 21 bytes (total 24)
> [ 192.939453] 24 24 24: write
> [ 192.940246] 34 34 34: read for 3 bytes
> [ 192.940246] 34 34 34: read actually 3 bytes (total 3)
> [ 192.940277] 34 34 34: read for 31 bytes
> [ 192.940307] 34 34 34: read actually 31 bytes (total 34)
> [ 192.943206] 34 34 34: write
> [ 192.944152] 34 34 34: read for 3 bytes
> [ 192.944183] 34 34 34: read actually 3 bytes (total 3)
> [ 192.944213] 34 34 34: read for 31 bytes
> [ 192.944213] 34 34 34: read actually 31 bytes (total 34)
> [ 192.944488] 34 34 34: write
> [ 192.945373] 47 47 47: read for 3 bytes
> [ 192.945373] 47 47 47: read actually 3 bytes (total 3)
> [ 192.945404] 47 47 47: read for 44 bytes
> [ 192.945434] 47 47 47: read actually 44 bytes (total 47)
> [ 192.946594] 47 47 47: write
> [ 192.981689] 6656 4096 3832: read for 3 bytes
> [ 192.981750] 7168 4096 3832: read actually 3 bytes (total 3)
> [ 192.981811] 7680 4096 3832: read for 65532 bytes
> [ 192.982177] 11264 11264 3832: read actually 3829 bytes (total 3832)

this is weird. Why didn't we get more data ? Where's the rest of this
block ??

> [ 194.410125] musb_hdrc periph: enabled ep3in for bulk IN, maxpacket 512
> [ 194.410156] musb_hdrc periph: enabled ep3out for bulk OUT, maxpacket 512
> [ 194.474456] musb_hdrc periph: enabled ep3in for bulk IN, maxpacket 512
> [ 194.474487] musb_hdrc periph: enabled ep3out for bulk OUT, maxpacket 512
> [ 200.706115] 65556 65556 3853: read for 3 bytes
> [ 200.706176] 65556 65556 3853: read actually 3 bytes (total 3835)
> [ 200.706207] 65556 65556 3853: read for 18 bytes
> [ 200.706207] 65556 65556 3853: read actually 18 bytes (total 3853)
> [ 200.706542] 65556 65556 3853: write

I'll add more messages to be sure what's going on.

--
balbi


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