I've got the Wolfson Audio card running with an application that makes use of the Line-In and Line-Out ports. The Line-In port is _constantly_ read and to the Line-out port audio is written in parallel from time to time. Sampling rate is 48k. The kernel is compiled following the description here in this forum.
I now had the issue twice that the app hangs after about a day and a half. The second time I was able to collect the following info:
End of dmesg:
root@raspberrypi:/home/pi# dmesg | tail [135777.724427] arizona spi0.1: FLL1: Timed out waiting for lock [136377.676455] arizona spi0.1: FLL1: Timed out waiting for lock [136977.638482] arizona spi0.1: FLL1: Timed out waiting for lock [137577.600549] arizona spi0.1: FLL1: Timed out waiting for lock [138099.977529] arizona spi0.1: FLL1: Timed out waiting for lock [138777.524608] arizona spi0.1: FLL1: Timed out waiting for lock [139377.496589] arizona spi0.1: FLL1: Timed out waiting for lock [139977.448573] arizona spi0.1: FLL1: Timed out waiting for lock [139977.522931] ERROR: 4096 KiB atomic DMA coherent pool is too small! [139977.522931] Please increase it with coherent_pool= kernel parameter!
The app hangs. After kill -9 any attempt to restart fails with the following message from the app:
*** ERROR: snd_pcm_start failed (unrecoverable error): Cannot allocate memory *** ERROR: Start capture failed
Here is the end of the corresponding strace of an app start attempt:
stat64("/usr/share/alsa/alsa.conf", {st_mode=S_IFREG|0644, st_size=9184, ...}) = 0
open("/dev/snd/controlC0", O_RDONLY|O_CLOEXEC) = 5
fcntl64(5, F_SETFD, FD_CLOEXEC) = 0
ioctl(5, UI_DEV_CREATE, 0xbef492cc) = 0
close(5) = 0
open("/dev/snd/controlC0", O_RDWR|O_CLOEXEC) = 5
fcntl64(5, F_SETFD, FD_CLOEXEC) = 0
ioctl(5, USBDEVFS_CONTROL or USBDEVFS_CONTROL32, 0xbef4946c) = 0
ioctl(5, 0x40045532, 0xbef494a4) = 0
open("/dev/snd/pcmC0D0c", O_RDWR|O_NONBLOCK|O_CLOEXEC) = 6
fcntl64(6, F_SETFD, FD_CLOEXEC) = 0
close(5) = 0
ioctl(6, AGPIOC_ACQUIRE or APM_IOC_STANDBY, 0xbef492e8) = 0
fcntl64(6, F_GETFL) = 0x802 (flags O_RDWR|O_NONBLOCK)
ioctl(6, AGPIOC_INFO, 0xbef492dc) = 0
clock_gettime(CLOCK_MONOTONIC, {172144, 75851672}) = 0
ioctl(6, AGPIOC_SETUP, 0xbef492e4) = 0
mmap2(NULL, 4096, PROT_READ, MAP_SHARED, 6, 0x80000) = -1 ENXIO (No such device or address)
ioctl(6, 0xc0844123, 0xbef49408) = 0
fcntl64(6, F_GETFL) = 0x802 (flags O_RDWR|O_NONBLOCK)
fcntl64(6, F_SETFL, O_RDWR) = 0
ioctl(6, 0xc25c4110, 0x1935718) = 0
ioctl(6, 0xc25c4110, 0x1935718) = 0
ioctl(6, 0xc25c4110, 0x1935718) = 0
ioctl(6, 0xc25c4110, 0x1935718) = 0
ioctl(6, 0xc25c4110, 0x1935718) = 0
ioctl(6, 0xc25c4110, 0x1935718) = 0
ioctl(6, 0xc25c4110, 0x1935718) = 0
ioctl(6, 0xc25c4110, 0x1935718) = 0
ioctl(6, 0xc25c4110, 0x1935718) = 0
ioctl(6, 0xc25c4110, 0x1935718) = 0
ioctl(6, 0xc25c4110, 0x1935718) = 0
ioctl(6, 0xc25c4111, 0x1935718) = 0
ioctl(6, 0xc0844123, 0x1935bb8) = 0
ioctl(6, 0xc0684113, 0xbef496d4) = 0
ioctl(6, 0x4140, 0xb69d5000) = 0
ioctl(6, 0xc0844123, 0x1935bb8) = 0
ioctl(6, 0xc0684113, 0x19353e0) = 0
ioctl(6, 0x4140, 0xb69d5000) = 0
ioctl(6, 0xc0844123, 0x1935bb8) = 0
ioctl(6, 0xc0844123, 0x1935bb8) = 0
ioctl(6, 0x4142, 0x1935bb8) = -1 ENOMEM (Cannot allocate memory)
write(2, "*** ERROR: snd_pcm_start failed "..., 55*** ERROR: snd_pcm_start failed (unrecoverable error): ) = 55
write(2, "Cannot allocate memory", 22Cannot allocate memory) = 22
write(2, "\n", 1
) = 1
write(2, "*** ERROR: Start capture failed", 31*** ERROR: Start capture failed) = 31
write(2, "\n", 1
) = 1
ioctl(6, 0x4143, 0xb69d5000) = 0
ioctl(6, 0x4112, 0xf5519900) = 0
close(6) = 0
write(2, "*** ERROR: Could not open audio "..., 53*** ERROR: Could not open audio device for receiver ") = 53
write(2, "Rx1", 3Rx1) = 3
write(2, "\"\n", 2"
) = 2
close(4) = 0
brk(0x1955000) = 0x1955000
brk(0x1947000) = 0x1947000
write(2, "*** ERROR: Could not initialize "..., 36*** ERROR: Could not initialize RX ") = 36
write(2, "Rx1", 3Rx1) = 3
write(2, "\"\n", 2"
) = 2
write(2, "*** ERROR: Could not initialize "..., 46*** ERROR: Could not initialize Logic object ") = 46
write(2, "RepeaterLogic", 13RepeaterLogic) = 13
write(2, "\". Skipping...\n", 15". Skipping...
) = 15
write(2, "*** ERROR: No logics available. "..., 47*** ERROR: No logics available. Bailing out...
) = 47
exit_group(1) = ?
BTW, the app is supposed to run _for-ever_ reading and processing audio... running for two years without restart is common for users of this app on x86 hardware.
Is there any driver update on the way that could fix this (and allow lower sampling rates on the analogue input)?
Thanks?
