clock_getcycle always returns an incremented cycle value
If the hardware does not support perf event it will use arch_alarm's up_perf_gettime
Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
1) Previously adjustments less than 1 microsecond per tick would be
completely ignored. Now they are applied over a shorter period at
a rate of 1 us per tick.
2) Previously CLOCK_ADJTIME_PERIOD was in units of 1/100th of second.
Change to milliseconds to be more generally useful unit.
Change setting name to CLOCK_ADJTIME_PERIOD_MS to make the unit change
easier to notice.
3) Previously CLOCK_ADJTIME_SLEWLIMIT was in percentage.
Most clock crystals have better accuracy than 1%, so the minimum slew
rate was excessive. Change to CLOCK_ADJTIME_SLEWLIMIT_PPM with setting
value in parts per million.
4) No need to use floating point math in clock_adjtime.c.
The SHM physically backed memory does not belong to the user process,
but the page table containing the mapping does -> delete the page table
memory regardless.
Update the gcc compiler to 10.3-2021.10 to be able to compile the latest NuttX version
Fix for error:
arm-none-eabi-g++: error: unrecognized command line option '-std=gnu++20';
did you mean '-std=gnu++2a'?
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
This is a collection of tweaks / optimizations to the driver to limit
CPU usage as well as interrupt processing times.
The changes are as follows:
- setfrequency is now no-op if the frequency does not change. Accessing
MPFS_SPI_CONTROL requires synchronization to the FIC domain, which
takes unnecessary time if nothing changes
- load/unload FIFO loops optimized so !buffer, priv->nbits and i==last are
only tested once (instead of for every word written in loop).
- Disable the RX interrupt only once (again, FIC domain access is slow)
- In case a spurious MPFS_SPI_DATA_RX interrupt arrives, just wipe the
whole RX FIFO, instead of trying to read it byte-by-byte
we can mount a zipfile in nuttx use mount command like this:
mount -t zipfs -o /data/test.zip /zip
The zipfs is a read only file system,The advantage is that it
does not occupy additional space when reading the decompressed file.
When used, reading and decompression operations are simultaneous.
The known disadvantage is that when using seek to read forward,
it will reopen and cause slow speed problems.
Signed-off-by: anjiahao <anjiahao@xiaomi.com>
Allows setting the advertised route lifetime, and also to set
it to 0 for advertising only the prefix.
From RFC4861:
A router might want to send Router Advertisements without advertising
itself as a default router. For instance, a router might advertise
prefixes for stateless address autoconfiguration while not wishing to
forward packets. Such a router sets the Router Lifetime field in
outgoing advertisements to zero.
forget from patch:
commit bbf5b0bb6d
Author: jianglianfang <jianglianfang@xiaomi.com>
Date: Tue Aug 15 19:47:14 2023 +0800
driver/video: adapting Goldfish FB to VSync optimized FB driver
The circbuf part is implemented by the fb driver, and goldfish needs to
delete the part related to circbuf and adapt to the interface of the fb
driver.
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
CONFIG_SCHED_CPULOAD_EXTCLK doesn't actually require tickless mode.
As long as the platform provides external call to nxsched_process_cpuload(),
it will work in either tickless or ticking mode.
Removed Kconfig dependency.
Instead, CONFIG_SCHED_CPULOAD_SYSCLK does require ticking mode to work,
as documented in CONFIG_SCHED_CPULOAD help text.
Added the dependency to Kconfig also.
stm32_ifdown() holds critical section when calling stm32_ethreset().
That function used to call up_mdelay(10) while waiting for the ethernet
peripheral reset to complete. This resulted in excessively long
critical section time with interrupts disabled.
The actual expected delay is a few clock ticks of the 50 MHz clock domain.
This commit changes polling interval to 1us and maximum to 10us.
Our releases contain links to github PR and lots of text so we
are splitting the release notes to individual files
This change should
- improve readability
- reduce the ReleaseNotes file for each release.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
For programs with the dependencies logic in pthread_once callback , using global locks may cause deadlock:
task A
pthread_once()
|
|-> nxrmutex_lock(&g_lock);
-> init_routine(); // callback to wait task B
task B
pthread_once()
|
->nxrmutex_lock(&g_lock); // Deadlock
->init_routine(); // hold resource to wake up task A
Signed-off-by: hujun5 <hujun5@xiaomi.com>
The function name comes from list.h inside Linux,
but rewrite from scratch to avoid the copyright issue.
Since many developers are familiar with Linux list API.
Signed-off-by: ligd <liguiding1@xiaomi.com>
