On Mon, Jan 11, 2010 at 2:41 PM, Gustavo F. Padovan <padovan@xxxxxxxxxxxxxx> wrote: > Hi, > > On Mon, Jan 11, 2010 at 1:56 PM, lukasz <ru-dy@xxxxx> wrote: >> >> I'm sorry if I write this msg in wrong place or wrong format. >> >> I'm using bluez (l2cap connection) and all my operations are using >> socket API. I have problem with latencies and I would like to know, >> when my packet was sent. Is there any possibility to subscribe with >> function handler or get "packet handled" event from the stack ? In my >> case I don't want to send next packet, if the previous one is not sent >> ( I don't want buffer them, throughput can be limited, I need minimal >> latencies). Is there any possibility to limit socket buffer size (2nd >> write to socket will block, when I will try to write 2nd packet, before >> 1st is not sent) ? > > l2cap actually doesn't send the packets, it calls the hci layer to > queue the packets for sending. The hci layer eventually will send the > packet. > > You can try to use the L2CAP Enhanced Retransmission Mode with > txWindow = 1. So, you will need to wait the ack from the remote side > to send the next packet. But keep in mind that Enhanced Retransmission Mode is still experimental. > >> >> >> best regards, >> sorry for my English >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > > > > -- > Gustavo F. Padovan > ProFUSION embedded systems - http://profusion.mobi > -- Gustavo F. Padovan ProFUSION embedded systems - http://profusion.mobi -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
