MetaIRQs are described in docs and exercised in tests, but there's no
sample explaining how they are intended to be used to perform
interrupt bottom half processing.
This simple tool spawns a set of worker threads at different
priorities (some cooperative) which process "messages" (which require
CPU time to handle) received from a fake "device" implemented with
timer interrupts. The device hands off the events directly to a
MetaIRQ thread which is expected to parse and dispatch them to the
worker threads.
The test demonstrates that no matter the state of the system, the
MetaIRQ thread always runs synchronously when woken by the ISR and is
able to preempt all worker threads to do its job.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Move LVGL sample from samples/gui/lvgl to samples/display/lvgl to have
a unified location for display related samples.
Signed-off-by: Jan Van Winkel <jan.van_winkel@dxplore.eu>
This sample showcases efficient utilization of SMP system
with processing of independent resource-hungry workloads.
With no cross-dependencies between workers and no usage of shared
resources (during heavy-lifting itself) we may demonstrate almost
linear scaling of efficiency. I.e. 2 cores do the same amount of
calculations twice faster than only 1 core. 4 cores complete
the same calculations 2 times faster than 2 cores.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Achieved using CONFIG_NET_CONFIG_CLOCK_SNTP_INIT option, i.e. querying
time over network using SNTP.
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Simple video sample getting frames from video capture device.
Tested with mimxrt1064_evk and MT9M114 sensor.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
A new role :zephyr_file: is available that renders to a link to the file
or folder in GitHub. Find appropriate references using :file: and
convert to :zephyr_file: to take advantage of its linking capability.
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
Andy Ross