Hello Lorenzo,
On Mon, Feb 13, 2023 at 10:19:57AM +0100, Philippe De Muyter wrote:
> I have a bug, with our without the patch : frequently
> my test, using a loop around iio-generic-buffer, blocks on the poll syscall.
> No value comes anymore. This happens both with the gyro as with the accel
> component.
>
> More info follows.
Here is the way I test :
# iio/lsiio
Device 001: ism330dlc_gyro
Device 002: ism330dlc_accel
Device 000: ina3221x
# for axis in x y z; do echo 1 >/sys/bus/iio/devices/iio\:device1/scan_elements/in_anglvel_${axis}_en; done
# echo 416 > /sys/bus/iio/devices/iio\:device1/sampling_frequency
# while true; do sudo iio/iio_generic_buffer -n ism330dlc_gyro -g -c 6 -a; sleep 2; done
iio device number being used is 1
trigger-less mode selected
Auto-channels selected but some channels are already activated in sysfs
Proceeding without activating any channels
0.002291 -0.073762 0.033139
0.003971 -0.075289 0.035583
0.003971 -0.076969 0.036194
0.004123 -0.074220 0.037110
0.003207 -0.074678 0.034667
0.002596 -0.073456 0.035277
iio device number being used is 1
trigger-less mode selected
Auto-channels selected but some channels are already activated in sysfs
Proceeding without activating any channels
0.002138 -0.074067 0.034819
0.003512 -0.075442 0.034819
0.001985 -0.074373 0.035430
0.002902 -0.074373 0.035888
0.002138 -0.074220 0.036346
0.003360 -0.076053 0.035277
After a quick time, iio_generic_buffer gets blocked in the poll syscall.
Hitting 'CTRL-C' kills the iio_generic_buffer process, and the next one
then receives values.
This happens with both gyro and accel.
Do you encounter the same problem ?
My kernel is actually a 4.9 one with a backport of iio core infrastructure
and iio/imu/st_lsm6dsx of 6.2, but I could have missed something important.
Best regards
Philippe
