on some device, the wifi driver uses dev->d_len as the length of the sent packet. However, due to the lack of update in d_len, the sent packet is not considered a normal packet and is not processed by the other end
Signed-off-by: wangchen <wangchen41@xiaomi.com>
Since the adafruit-kb2040:smp do not support the `atomic_init`, we have
to remove the function.
Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
The optimization reduces one judgment in read operations, improving write performance by 3% and read performance by 10%.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
This commit implemented seqlock for non-SMP platforms, which achieves
1.62x performance improvement.
Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
This commit improved the seqlock performance on non-SMP and SMP
platforms by 31.7% on average (83Mops -> 106Mops, tested on qemu-intel64/KVM).
Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
This commit provided a better implementation of the seqlock, which
ensure the functional correctness and provide better performance.
Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
This commit removed unnecessary memory barriers of the seqlock
implementation, since they may block the CPU pipeline and lead to
performance degradation.
Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
03:17:57 /home/work/ssd1/workspace/Vela-Multi-Boards-dev-system-Build@2/nuttx/include/nuttx/seqlock.h: In function 'read_seqbegin':
03:17:57 /home/work/ssd1/workspace/Vela-Multi-Boards-dev-system-Build@2/nuttx/include/nuttx/seqlock.h:107:3: error: 'asm' undeclared (first use in this function)
03:17:57 SMP_RMB();
03:17:57 ^
03:17:57 /home/work/ssd1/workspace/Vela-Multi-Boards-dev-system-Build@2/nuttx/include/nuttx/seqlock.h:107:3: note: each undeclared identifier is reported only once for each function it appears in
03:17:57 /home/work/ssd1/workspace/Vela-Multi-Boards-dev-system-Build@2/nuttx/include/nuttx/seqlock.h:107:3: error: expected ';' before 'volatile'
03:17:57 SMP_RMB();
03:17:57 ^
Signed-off-by: wangzhi16 <wangzhi16@xiaomi.com>
This commit moved the g_wdtimernested to sched_timerexpiration, since
wdog and hrtimer can share it.
Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
This commit changed the return value semantics.
In past designs, timers that were expected to fire immediately were delayed by at least one tick, resulting in a decrease in real-time performance.
This commit re-encoded the return value to allow the timers fire
immediately.
Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
When triggering TCP retransmission through a timer, conn->unacked_q will save more packets, which may result in sndseq being equal to ackseq. Previous implementations may cause conn->nrtx to not be cleared, leading to an increase in conn->rto errors and a longer timer time
Signed-off-by: wangchen <wangchen41@xiaomi.com>
The modification is to solve the problem that the opposite end cannot receive the retransmission message, and the protocol stack no longer sends retransmission messages
Signed-off-by: wangchen <wangchen41@xiaomi.com>
when C++ lib has an atomic implementation, we shouldn't include NuttX defined macros to avoid conflicts
Fix errors like:
build/include/libcxx/__atomic/atomic.h:445:1: error: expected identifier before numeric constant
445 | atomic_fetch_add(volatile atomic<_Tp>* __o, typename atomic<_Tp>::difference_type __op) _NOEXCEPT
| ^~~~~~~~~~~~~~~~
Signed-off-by: raiden00pl <raiden00@railab.me>
We don't need to subtract the block size; we only need to determine if it's within the interrupt memory range.
Signed-off-by: anjiahao <anjiahao@xiaomi.com>
Userled register path shouldn't depend on LED example.
This dependency is broken, kernel code should not depend on apps code.
Signed-off-by: raiden00pl <raiden00@railab.me>
