found usbfs at /dev/bus/usb
found usb devices insysfs
add fd 9events 1
created defaultcontext
scan usb1
sysfs descriptors available
bus=1dev=1
busnum 1devaddr 1session_id 257
allocating newdevice for1/1(session 257)
scan 1-1
bus=1dev=2
busnum 1devaddr 2session_id 258
allocating newdevice for1/2(session 258)
scan 1-1.1
bus=1dev=3
busnum 1devaddr 3session_id 259
allocating newdevice for1/3(session 259)
open 1.3
add fd 11events 4
destroy device 1.1
destroy device 1.2
configuration 1
interface0
nexttimeout in2.499878s
poll()2fds withtimeout in2000ms
poll()returned 1
urb type=2status=0transferred=0
handling completion status 0
actual_length=0(control transfer的回调)
nexttimeout in2.499909s
poll()2fds withtimeout in2000ms
poll()returned 1
urb type=2status=0transferred=0
handling completion status 0
actual_length=0(另一个control transfer的回调)
need 10urbs fornewtransfer withlength 153600
nexttimeout in0.997836s(从这里开始查询bulk)
poll()2fds withtimeout in998ms
poll()returned 1
urb type=3status=0transferred=16384
handling completion status 0of bulk urb 1/10
nexttimeout in0.379086s
poll()2fds withtimeout in380ms
poll()returned 1
urb type=3status=0transferred=16384
handling completion status 0of bulk urb 2/10
nexttimeout in0.253080s
poll()2fds withtimeout in254ms
poll()returned 0
all URBshave already been processed fortimeouts (超时)
poll()2fds withtimeout in2000ms
poll()returned 1
urb type=3status=-2transferred=9728
handling completion status -2of bulk urb 3/10
CANCEL:detected a cancelled URB
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 1
urb type=3status=-2transferred=0
handling completion status -2of bulk urb 4/10
CANCEL:detected a cancelled URB
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 1
urb type=3status=-2transferred=0
handling completion status -2of bulk urb 5/10
CANCEL:detected a cancelled URB
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 1
urb type=3status=-2transferred=0
handling completion status -2of bulk urb 6/10
CANCEL:detected a cancelled URB
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 1
urb type=3status=-2transferred=0
handling completion status -2of bulk urb 7/10
CANCEL:detected a cancelled URB
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 1
urb type=3status=-2transferred=0
handling completion status -2of bulk urb 8/10
CANCEL:detected a cancelled URB
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 1
urb type=3status=-2transferred=0
handling completion status -2of bulk urb 9/10
CANCEL:detected a cancelled URB
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 1
urb type=3status=-2transferred=0
handling completion status -2of bulk urb 10/10
CANCEL:detected a cancelled URB
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 0
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 0
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 0
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 0
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 0
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 0
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
poll()returned 0
all URBshave already been processed fortimeouts
poll()2fds withtimeout in2000ms
^C
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