Raspberry Pi Forums

longo92

All my threads fail. As said the timer does not trigger inttetrupt, then everything is actually sleeping will sleep forever, also every command that use a sleep function will wait forever (command like top or a simple ping).

longo92

I have 35 threads that sleeps using clock_nanosleep on CLOCK_MONOTONIC,in total i have 1200-1330 int/s.

longo92

I have a set of periodic threads, which workload varies. My problem is that after a while the timer does not trigger interrupt (i check using cat /proc/interrupt). Has anything like this ever happened to you?

longo92

Hi,
is there a maximum limit on the number of interrupt per second which the system timer can handle?

longo92

Grazie mille Giuliano. I'm actually trying with your fix on cmdline.txt and seems working; i would like understand deeper the issue, do you know if there is a way to see (from linux command line) the last interrupt handler holding the cpu? Or to know if is Linux stalled on interrupt handler? Thanks

longo92

Hi, I'm discovering a similar problem in post: https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=159170&p=1566453#p1566453 I'm using kernel 4.14 non-RT patched on a raspberry pi 0 W, i have the following issue: after some time the timer interrupts are not incremented (i check using "cat /proc/...

longo92

Hi, i'm resuming this old post. I'm using kernel 4.14 non-RT patched on a raspberry pi 0 W, i have the following issue: after some time the timer interrupts are not incremented (i check using "cat /proc/interrupts"). i have a process in charge of recording, play and send/receive sound over network, ...

longo92

I have two more questions about developing opengl application: 1) Regarding performance and power consumption: is better to use legacy or KMS? 2) Are those drivers transparent to the programmer (i.e., the executable is the same)? Or i must compile using different OpengGl library (instead of brcmGLES...

longo92

Ok, thanks for your explanation. can i found the source code of KMS drivers (both Fake and Full) here https://github.com/raspberrypi/linux/tree/rpi-4.19.y/drivers/gpu/drm/vc4, right? Instead is the legacy driver propetary closed-source (i.e., impossible to find the source code)? Thank you, Alessandro

longo92

Hi, i don't understand the differences between those drivers. Can you explain to me? AFAIK the Legacy driver is the one enabled by default. In https://github.com/raspberrypi/userland/tree/master/interface/khronos/glxx there is the implementation of Opengl ES, the opengl commands are sent by the clie...

longo92

Hi, i have two thread: -One is in charge of decoding an h264 stream. -The other is an opengl es 2.0 rendering thread. I set up the h264 decoder in order to have a mmal opaque buffers as output, then i pass them to a render thread (using an mmal queue) that transforms into textures rendered on a quad...

longo92

Sorry but the program is too compex (streaming video and audio app), the problem is that the timer doesn't trigger interrupts at some point in time (check /proc/interrupts), so my processes waiting in nanosleep cannot awake.

longo92

Hi, I have a raspberry pi 0 that runs two application: the first a video-straming app. (takes video from the rpi camera, encodes in H264 and streams) and the second an audio streaming app (takes audio throug a microphone via usb card device, encodes it using opus and then streams), both through webs...

longo92

Hi, i have a multi-threaded program with a certain number of periodic threads. The typical periodic thread code is the following: static void time_add_ms(struct timespec *t, int ms) { t->tv_sec += ms/1000; t->tv_nsec += (ms%1000)*1000000; if (t->tv_nsec > 1000000000) { t->tv_nsec -= 1000000000; t->t...

longo92

I mean if you don't know the resolution of the incoming streaming and you want infer at run time. Is there a way? For inpurt port is passing the sps/pps but what options for the output port?

longo92

OK, it works. For the output port is there a similar trick?

longo92

Hi, Is there a way to set the decoder width and heigth of the input/output port using the sps? I know that pass it in the extradata field in the format input port (like in the example https://github.com/raspberrypi/userland/blob/master/interface/mmal/test/examples/example_basic_2.c) is used to set t...

longo92

When that pool is destroyed the underlying image is released. Even though you have copied the data or pointer from buffer->data it can no longer be interpreted. Ok let's start from a general question: since i get the mmal buffer header from the callback associated to the video port of camera compon...

longo92

Hi, i have two programs A and Brunning in parallel: -The program A takes frame from camera as opaque buffer (with encoding variant i420) and passes the mmal buffer header through a named pipe to program B. -The program B takes such mmal buffer and uses it in an opengl ES 2.0 rendering (using the dat...

longo92

Hi, someone knows ifit is possibile to use dpi18 (for controlling head-mounted display) and i2s (for microphone/speaker) placed on bank 0 ? From trails it seems that enabling dpi mode disables all the other peripherals. I tried to modify the /boot/config.txt without effect. Is there an option to ove...

longo92

But the question is: why the opaque encoding is not listed as a supported encoding in the output port?

longo92

Ok, i resolved: it's possibile to decode as opaque buffer and use the buffer as an EGL IMAGE. Fantastic.

longo92

HI, i have a file .h264 that is decoded using MMAL_COMPONENT_DEFAULT_VIDEO_DECODER. I want transform each decoded frame in an OpenGl ES texture. I know (and i tested) that there is a way to tranform each camera frame in an EGL image (and then use it as a texture) through opaque buffer (MMAL_ENCODING...

longo92

What is MMAL_PARAMETER_RATECONTROL?

longo92

Thanks for your really precious and precise answer. I try and the isp, on my case, for resizing is much faster.

Search found 55 matches

Re: Timer interrupt per second limit

Re: Timer interrupt per second limit

Re: Timer interrupt per second limit

Timer interrupt per second limit

Re: Freezing with RT-patch (Pi 3)

Possible usb FIQ problem with system timer

Re: Freezing with RT-patch (Pi 3)

Re: Full KMS vs Fake KMS vs Legacy driver

Re: Full KMS vs Fake KMS vs Legacy driver

Full KMS vs Fake KMS vs Legacy driver

Decoder and EGL image

Re: Clock_nanosleep issues

sched: RT throttling activated

Clock_nanosleep issues

Re: set the decode parameters using sps

Re: set the decode parameters using sps

set the decode parameters using sps

Re: passing the mmal opaque buffer header through IPC(named pipe)

passing the mmal opaque buffer header through IPC(named pipe)

using both dpi and i2s on bank 0

Re: Video decoder output port info

Re: Video decoder output port info

Video decoder output port info

MMAL_PARAMETER_RATECONTROL

Re: MMAL Reziser input sets to opaque