Hello. I have: 1. Davinci DM365 board. 2. WIFI USB adapter (carl9170). 3. 2.6.34 kernel + all commits for MUSB from http://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci.git I do UDP streaming with packet size ~ 1450 bytes. But streaming speed is too low. CPU burns at 100% load. readprofile shows: readprofile | sort -nr -k 3 |head -n 10 6033 davinci_interrupt 9,5459 1335 handle_IRQ_event 4,8370 111 arm926_dma_clean_range 3,9643 558 sub_preempt_count 2,9062 185 memcmp 2,5694 With musb_hdrc.debug=3 I have noticed strange messages: musb_host_tx 1268: DMA complete but packet still in FIFO, CSR 2003 musb_ep_program 715: <-- hw2 urb c74c8180 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 musb_ep_program 715: --> hw4 urb c7686e80 spd3 dev2 ep4out h_addr00 h_port00 bytes 60 musb_start_urb 265: check whether there's still time for periodic Tx musb_host_tx 1268: DMA complete but packet still in FIFO, CSR 2103 ... musb_ep_program 715: --> hw4 urb c77dbf00 spd3 dev2 ep4out h_addr00 h_port00 bytes 12 musb_start_urb 265: check whether there's still time for periodic Tx musb_ep_program 715: <-- hw2 urb c7662a80 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 musb_ep_program 715: <-- hw2 urb c7662f00 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 musb_ep_program 715: <-- hw2 urb c7662c80 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 musb_ep_program 715: <-- hw2 urb c7662000 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 musb_ep_program 715: <-- hw2 urb c7662800 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 .... Now my UDP streaming: musb_ep_program 715: --> hw2 urb c768b980 spd3 dev2 ep1out h_addr00 h_port00 bytes 1502 musb_ep_program 715: <-- hw2 urb c74c8f00 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 musb_ep_program 715: <-- hw2 urb c74c8780 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 musb_ep_program 715: --> hw2 urb c768b980 spd3 dev2 ep1out h_addr00 h_port00 bytes 1502 musb_ep_program 715: --> hw2 urb c768b980 spd3 dev2 ep1out h_addr00 h_port00 bytes 1502 musb_ep_program 715: <-- hw2 urb c74c8e00 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 musb_ep_program 715: <-- hw2 urb c74c8180 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 musb_ep_program 715: --> hw2 urb c768b980 spd3 dev2 ep1out h_addr00 h_port00 bytes 1502 musb_ep_program 715: --> hw2 urb c768b980 spd3 dev2 ep1out h_addr00 h_port00 bytes 1502 musb_ep_program 715: <-- hw2 urb c74bbb00 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 musb_ep_program 715: <-- hw2 urb c74bb500 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 musb_ep_program 715: --> hw2 urb c768b980 spd3 dev2 ep1out h_addr00 h_port00 bytes 1502 musb_ep_program 715: --> hw2 urb c768b980 spd3 dev2 ep1out h_addr00 h_port00 bytes 1502 musb_ep_program 715: <-- hw2 urb c74bbd80 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 musb_ep_program 715: <-- hw2 urb c768bd80 spd3 dev2 ep2in h_addr00 h_port00 bytes 8192 musb_ep_program 715: --> hw2 urb c768b980 spd3 dev2 ep1out h_addr00 h_port00 bytes 1502 musb_ep_program 715: --> hw2 urb c768b980 spd3 dev2 ep1out h_addr00 h_port00 bytes 1502 1502 - is my ethernet frame. What is 8192 ? On another USB RT2870/RT3070 Wireless Adapter I got fine picture: musb_ep_program 715: --> hw2 urb c763c900 spd3 dev2 ep1out h_addr00 h_port00 bytes 1496 musb_ep_program 715: --> hw2 urb c763c900 spd3 dev2 ep1out h_addr00 h_port00 bytes 1496 musb_ep_program 715: --> hw2 urb c763c900 spd3 dev2 ep1out h_addr00 h_port00 bytes 1496 musb_ep_program 715: --> hw2 urb c763c900 spd3 dev2 ep1out h_addr00 h_port00 bytes 1496 musb_ep_program 715: --> hw2 urb c763c900 spd3 dev2 ep1out h_addr00 h_port00 bytes 1496 musb_ep_program 715: --> hw2 urb c763c900 spd3 dev2 ep1out h_addr00 h_port00 bytes 1496 musb_ep_program 715: --> hw2 urb c763c900 spd3 dev2 ep1out h_addr00 h_port00 bytes 1496 musb_ep_program 715: --> hw2 urb c763c900 spd3 dev2 ep1out h_addr00 h_port00 bytes 1496 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
