In certain cases, when the event-wait thread is awakened,
it needs to know the specific mask bit that triggered it,
so that it can branch to different paths accordingly.
This patch introduces the nxevent_getmask function to address this requirement.
Signed-off-by: Chengdong Wang <wangchengdong@lixiang.com>
There are cases that users do not want the event wait object to be allocated automatically
in the stack as a temporary varialbe in nxevent_tickwait, since multiple threads will
access the varialbe, they want to allocate the object as a global variable for safety
control or easy debug. To solve this problem, this patch add a new function nxevent_tickwait_wait
implementation to give user the chance to pass the global wait object to it.
Signed-off-by: Chengdong Wang <wangchengdong@lixiang.com>
This commit changed the type of the delay ticks to the unsigned, which can reduce the useless branch conditions
Besides, this commit added max delay tick limitation to fix incorrect timing behavior if we delay SCLOCK_MAX in the SMP build.
Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
This extension for the event group, to establish a connection between
named event groups and a task. The task may reference the event group
associated with a VFS-based name. Then the event group can be used
in subsequent calls to nxevent_wait() or nxevent_post().
This is an internal OS interface and should not be used by applications.
Signed-off-by: fangxinyong <fangxinyong@xiaomi.com>
Events groups are synchronization primitives that allow tasks to wait
for multiple conditions to be met before proceeding. They are particularly
useful in scenarios where a task needs to wait for several events to occur
simultaneously.
Signed-off-by: chao an <anchao@lixiang.com>
- NewReno congestion control algorithm is used to solve the problem
of network congestion breakdown. NewReno congestion control includes
slow start, collision avoidance, fast retransmission, and fast
recovery. The implementation refers to RFC6582 and RFC5681.
- In addition, we optimize the congestion algorithm. In the conflict
avoidance stage, the maximum congestion window max_cwnd is used to
limit the excessive growth of cwnd and prevent network jitter
caused by congestion. Maximum congestion window max_cwnd is updated
with the current congestion window cwnd and the update weight is
0.875 when an RTO timeout occurs.
Signed-off-by: liqinhui <liqinhui@xiaomi.com>
The function is not relevant any longer, remove it. Also remove
save_addrenv_t, the parameter taken by up_addrenv_restore.
Implement addrenv_select() / addrenv_restore() to handle the temporary
instantiation of address environments, e.g. when a process is being
created.
This is preparation for moving address environments out of the group
structure into the tcb.
Why move ? Because the group is destroyed very early in the exit phase,
but the MMU mappings are needed until the context switch to the next
process is complete. Otherwise the MMU will lose its mappings and the
system will crash.
It takes about 10 cycles to obtain the task list according to the task
status. In most cases, we know the task status, so we can directly
add the task from the specified task list to reduce time consuming.
It takes about 10 cycles to obtain the task list according to the task
status. In most cases, we know the task status, so we can directly
delete the task from the specified task list to reduce time consuming.
since it is impossible to track producer and consumer
correctly if TCP/IP stack pass IOB directly to netdev
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Multiple files were badly formatted, which resulted in many
warnings. This made it harder to check for errors in newly
written documentation.
What's worse, badly formatted text resulted in butchered
output in generated html.
This patch fixes most of the errors, but alas, not all of
the errors can be fixed. Anyway, this should be way easier
to spot errors in newly written docs now.
Signed-off-by: Michał Łyszczek <michal.lyszczek@bofc.pl>
Documentation/reference/os/wqueue.rst:
* Fix spelling, grammar, and typos.
* Improve wording in a few areas.
* Re-wrap the paragraphs that were modified.
Documentation/reference/os/wqueue.rst:
* CONFIG_SIG_SIGWORK: Fix sentence that was cut off in the
middle.
include/signal.h:
* SIGWORK: Fix grammar in comment.
sched/Kconfig:
* config SIG_SIGWORK: Fix ---help--- text to indicate that
this user-configured signal number may be used by various
internal worker threads.
