On Sun, Mar 17, 2013 at 7:44 AM, Wander Lairson Costa <wander.lair...@gmail.com> wrote: > Ok, I ran the tests again in Ubuntu 12.10 with HEAD libusbx. I problem > I am getting is trying to loop less than 32 bytes (a packet size), > which I read returns error. Not sure if it is a firmware bug or a > limitation of isochronous transfer by itself.
I believe for this benchmark firmware, the expectation is that you need to send in multiple of wMaxPacketSize. > The "0 zero bytes" read problem I see in your code probably is due to > firmware internal buffer size. What is the output of "./iso-test -n 256" under your Linux setup? Something is wrong with the libusbx Mac OS X isochronous codes. The following is the debug output. mymacmini:isochronous xiaofanc$ ./iso-test -n 256 [timestamp] [threadID] facility level [function call] <message> -------------------------------------------------------------------------------- [ 0.000005] [0000060b] libusbx: debug [libusb_init] created default context [ 0.000070] [0000060b] libusbx: debug [libusb_init] libusbx v1.0.14.10630 ... ... [ 0.116315] [0000060b] libusbx: debug [libusb_open] open 250.6 [ 0.117654] [0000060b] libusbx: debug [usbi_add_pollfd] add fd 6 events 1 [ 0.117669] [0000060b] libusbx: debug [darwin_open] device open for access [ 0.117694] [0000060b] libusbx: debug [libusb_unref_device] destroy device 250.1 [ 0.117707] [0000060b] libusbx: debug [libusb_unref_device] destroy device 250.2 [ 0.117719] [0000060b] libusbx: debug [libusb_unref_device] destroy device 250.4 [ 0.117730] [0000060b] libusbx: debug [libusb_unref_device] destroy device 250.5 [ 0.117748] [0000060b] libusbx: debug [libusb_unref_device] destroy device 250.8 [ 0.117758] [0000060b] libusbx: debug [libusb_unref_device] destroy device 250.9 [ 0.117768] [0000060b] libusbx: debug [libusb_unref_device] destroy device 253.1 [ 0.117778] [0000060b] libusbx: debug [libusb_unref_device] destroy device 253.2 [ 0.117789] [0000060b] libusbx: debug [libusb_unref_device] destroy device 253.4 [ 0.117801] [0000060b] libusbx: debug [libusb_set_configuration] configuration 1 [ 0.185232] [0000060b] libusbx: debug [libusb_claim_interface] interface 0 [ 0.186435] [0000060b] libusbx: debug [get_endpoints] building table of endpoints. [ 0.186466] [0000060b] libusbx: debug [get_endpoints] interface: 0 pipe 1: dir: 0 number: 1 [ 0.186482] [0000060b] libusbx: debug [get_endpoints] interface: 0 pipe 2: dir: 1 number: 1 [ 0.186534] [0000060b] libusbx: debug [darwin_claim_interface] interface opened [ 0.186575] [0000060b] libusbx: debug [libusb_set_interface_alt_setting] interface 0 altsetting 2 [ 0.190696] [0000060b] libusbx: debug [get_endpoints] building table of endpoints. [ 0.190717] [0000060b] libusbx: debug [get_endpoints] interface: 0 pipe 1: dir: 0 number: 1 [ 0.190736] [0000060b] libusbx: debug [get_endpoints] interface: 0 pipe 2: dir: 1 number: 1 [ 0.190747] [0000060b] libusbx: debug [libusb_get_active_config_descriptor] [ 0.190775] [0000060b] libusbx: debug [ep_to_pipeRef] converting ep address 0x01 to pipeRef and interface [ 0.190783] [0000060b] libusbx: debug [ep_to_pipeRef] pipe 1 on interface 0 matches [ 0.190841] [0000060b] libusbx: debug [libusb_get_next_timeout] next timeout in 9.999934s [ 0.190859] [0000060b] libusbx: debug [libusb_handle_events_timeout_completed] doing our own event handling [ 0.190879] [0000060b] libusbx: debug [handle_events] poll() 2 fds with timeout in 10000ms [ 0.201857] [00001707] libusbx: debug [darwin_async_io_callback] an async io operation has completed [ 0.201901] [00001707] libusbx: error [darwin_async_io_callback] async size truncation detected - please report this error [ 0.201936] [0000060b] libusbx: debug [handle_events] poll() returned 1 [ 0.201960] [0000060b] libusbx: debug [op_handle_events] checking fd 4 with revents = 0 [ 0.201972] [0000060b] libusbx: debug [op_handle_events] checking fd 6 with revents = 1 [ 0.201988] [0000060b] libusbx: debug [darwin_handle_callback] handling isoc completion with kernel status 0 [ 0.202001] [0000060b] libusbx: debug [usbi_handle_transfer_completion] transfer 0x7ff994002e00 has callback 0x10b08e6c0 Packet 0 requested to transfer 32 bytes, transfered 32 bytes. Packet 1 requested to transfer 32 bytes, transfered 32 bytes. Packet 2 requested to transfer 32 bytes, transfered 32 bytes. Packet 3 requested to transfer 32 bytes, transfered 32 bytes. Packet 4 requested to transfer 32 bytes, transfered 32 bytes. Packet 5 requested to transfer 32 bytes, transfered 32 bytes. Packet 6 requested to transfer 32 bytes, transfered 32 bytes. Packet 7 requested to transfer 32 bytes, transfered 32 bytes. [ 0.202062] [0000060b] libusbx: debug [libusb_get_active_config_descriptor] [ 0.202090] [0000060b] libusbx: debug [ep_to_pipeRef] converting ep address 0x81 to pipeRef and interface [ 0.202102] [0000060b] libusbx: debug [ep_to_pipeRef] pipe 2 on interface 0 matches [ 0.202171] [0000060b] libusbx: debug [libusb_get_next_timeout] next timeout in 9.999917s [ 0.202187] [0000060b] libusbx: debug [libusb_handle_events_timeout_completed] doing our own event handling [ 0.202199] [0000060b] libusbx: debug [handle_events] poll() 2 fds with timeout in 10000ms [ 0.213265] [00001707] libusbx: debug [darwin_async_io_callback] an async io operation has completed [ 0.213291] [00001707] libusbx: error [darwin_async_io_callback] async size truncation detected - please report this error [ 0.213333] [0000060b] libusbx: debug [handle_events] poll() returned 1 [ 0.213358] [0000060b] libusbx: debug [op_handle_events] checking fd 4 with revents = 0 [ 0.213380] [0000060b] libusbx: debug [op_handle_events] checking fd 6 with revents = 1 [ 0.213395] [0000060b] libusbx: debug [darwin_handle_callback] handling isoc completion with kernel status -536870169 [ 0.213407] [0000060b] libusbx: debug [usbi_handle_transfer_completion] transfer 0x7ff992502350 has callback 0x10b08e6c0 Packet 0 requested to transfer 32 bytes, transfered 32 bytes. Packet 1 requested to transfer 32 bytes, transfered 32 bytes. Packet 2 requested to transfer 32 bytes, transfered 32 bytes. Packet 3 requested to transfer 32 bytes, transfered 0 bytes. Packet 4 requested to transfer 32 bytes, transfered 0 bytes. Packet 5 requested to transfer 32 bytes, transfered 0 bytes. Packet 6 requested to transfer 32 bytes, transfered 0 bytes. Packet 7 requested to transfer 32 bytes, transfered 0 bytes. [ 0.213450] [0000060b] libusbx: debug [libusb_release_interface] interface 0 [ 0.215974] [0000060b] libusbx: debug [libusb_close] [ 0.216102] [0000060b] libusbx: debug [usbi_remove_pollfd] remove fd 6 [ 0.216167] [0000060b] libusbx: debug [libusb_unref_device] destroy device 250.6 [ 0.216193] [0000060b] libusbx: debug [libusb_exit] [ 0.216203] [0000060b] libusbx: debug [libusb_exit] destroying default context > BTW, I fixed the warnings you were getting. Yes the warnings are fixed. -- Xiaofan ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_mar _______________________________________________ libusbx-devel mailing list libusbx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libusbx-devel
