reason:
To remove the "sync pause" and decouple the critical section from the dependency on enabling interrupts,
after that we need to further implement "schedlock + spinlock".
changelist
1 Modify the implementation of critical sections to no longer involve enabling interrupts or handling synchronous pause events.
2 GIC_SMP_CPUCALL attach to pause handler to remove arch interface up_cpu_paused_restore up_cpu_paused_save
3 Completely remove up_cpu_pause, up_cpu_resume, up_cpu_paused, and up_cpu_pausereq
4 change up_cpu_pause_async to up_send_cpu_sgi
Signed-off-by: hujun5 <hujun5@xiaomi.com>
Change mqueue_msg_s to a dynamic array so that
mqueue msg can be malloc based on the msg size
of the current data when applied dynamically.
Signed-off-by: zhangyuan29 <zhangyuan29@xiaomi.com>
Add heap current used to note.
Plot it in segger sysview data plot.
Signed-off-by: xuxingliang <xuxingliang@xiaomi.com>
Signed-off-by: Neo Xu <neo.xu1990@gmail.com>
Record all memory allocation and release, save to ram, used to analyze memory allocation rate and memory usage
Its absolute value is not trustworthy because the memory will be allocated in thread A and released in thread B
netinit-5 [0] 0.105984392: tracing_mark_write: C|5|Heap Usage|96|free: heap: 0x606000000020 size:24, address: 0x603000000370
netinit-5 [0] 0.105996874: tracing_mark_write: C|5|Heap Usage|24|free: heap: 0x606000000020 size:72, address: 0x6070000008e0
nsh_main-4 [0] 3.825169408: tracing_mark_write: C|4|Heap Usage|2177665|free: heap: 0x606000000020 size:424, address: 0x614000000840
nsh_main-4 [0] 3.825228525: tracing_mark_write: C|4|Heap Usage|14977|free: heap: 0x606000000020 size:2162688, address: 0x7f80a639f800
nsh_main-4 [0] 3.825298789: tracing_mark_write: C|4|Heap Usage|15189|malloc: heap: 0x606000000020 size:20, address: 0x6030000003a0
Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
Signed-off-by: Neo Xu <neo.xu1990@gmail.com>
reason:
In the kernel, we are planning to remove all occurrences of up_cpu_pause as one of the steps to
simplify the implementation of critical sections. The goal is to enable spin_lock_irqsave to encapsulate critical sections,
thereby facilitating the replacement of critical sections(big lock) with smaller spin_lock_irqsave(small lock)
Signed-off-by: hujun5 <hujun5@xiaomi.com>
1. use '__attribute__((constructor))' mark initialize function
2. use '__attribute__((destructor))' mark uninitialize function
3. compile module with -fvisibility=hidden. use `__attribute__((visibility("default")))`
mark is need export symbol.so not need module_initialize to initialize export symbol.
Signed-off-by: anjiahao <anjiahao@xiaomi.com>
reason:
In the kernel, we are planning to remove all occurrences of up_cpu_pause as one of the steps to
simplify the implementation of critical sections. The goal is to enable spin_lock_irqsave to encapsulate critical sections,
thereby facilitating the replacement of critical sections(big lock) with smaller spin_lock_irqsave(small lock)
Configuring NuttX and compile:
$ ./tools/configure.sh -l qemu-armv8a:nsh_smp
$ make
Running with qemu
$ qemu-system-aarch64 -cpu cortex-a53 -smp 4 -nographic
-machine virt,virtualization=on,gic-version=3
-net none -chardev stdio,id=con,mux=on -serial chardev:con
-mon chardev=con,mode=readline -kernel ./nuttx
Signed-off-by: hujun5 <hujun5@xiaomi.com>
reason:
In the kernel, we are planning to remove all occurrences of up_cpu_pause as one of the steps to
simplify the implementation of critical sections. The goal is to enable spin_lock_irqsave to encapsulate critical sections,
thereby facilitating the replacement of critical sections(big lock) with smaller spin_lock_irqsave(small lock)
Configuring NuttX and compile:
$ ./tools/configure.sh -l qemu-armv8a:nsh_smp
$ make
Running with qemu
$ qemu-system-aarch64 -cpu cortex-a53 -smp 4 -nographic
-machine virt,virtualization=on,gic-version=3
-net none -chardev stdio,id=con,mux=on -serial chardev:con
-mon chardev=con,mode=readline -kernel ./nuttx
Signed-off-by: hujun5 <hujun5@xiaomi.com>
reason:
In the kernel, we are planning to remove all occurrences of up_cpu_pause as one of the steps to
simplify the implementation of critical sections. The goal is to enable spin_lock_irqsave to encapsulate critical sections,
thereby facilitating the replacement of critical sections(big lock) with smaller spin_lock_irqsave(small lock)
Configuring NuttX and compile:
$ ./tools/configure.sh -l qemu-armv8a:nsh_smp
$ make
Running with qemu
$ qemu-system-aarch64 -cpu cortex-a53 -smp 4 -nographic
-machine virt,virtualization=on,gic-version=3
-net none -chardev stdio,id=con,mux=on -serial chardev:con
-mon chardev=con,mode=readline -kernel ./nuttx
Signed-off-by: hujun5 <hujun5@xiaomi.com>
reason:
1 To improve efficiency, we mimic Linux's behavior where preemption disabling is only applicable to the current CPU and does not affect other CPUs.
2 In the future, we will implement "spinlock+sched_lock", and use it extensively. Under such circumstances, if preemption is still globally disabled, it will seriously impact the scheduling efficiency.
3 We have removed g_cpu_lockset and used irqcount in order to eliminate the dependency of schedlock on critical sections in the future, simplify the logic, and further enhance the performance of sched_lock.
4 We set lockcount to 1 in order to lock scheduling on all CPUs during startup, without the need to provide additional functions to disable scheduling on other CPUs.
5 Cpu1~n must wait for cpu0 to enter the idle state before enabling scheduling because it prevents CPUs1~n from competing with cpu0 for the memory manager mutex, which could cause the cpu0 idle task to enter a wait state and trigger an assert.
size nuttx
before:
text data bss dec hex filename
265396 51057 63646 380099 5ccc3 nuttx
after:
text data bss dec hex filename
265184 51057 63642 379883 5cbeb nuttx
size -216
Configuring NuttX and compile:
$ ./tools/configure.sh -l qemu-armv8a:nsh_smp
$ make
Running with qemu
$ qemu-system-aarch64 -cpu cortex-a53 -smp 4 -nographic \
-machine virt,virtualization=on,gic-version=3 \
-net none -chardev stdio,id=con,mux=on -serial chardev:con \
-mon chardev=con,mode=readline -kernel ./nuttx
Signed-off-by: hujun5 <hujun5@xiaomi.com>
wd_timer handler will change current task, so need process
scheduler before wd timer handler, Ensure that the current
task is not updated before the RR process
Signed-off-by: zhangyuan29 <zhangyuan29@xiaomi.com>
nxsem_tickwait correctly sleeps more than 1 tick. But nxsem_tickwait_uninterruptible
may wake up to a signal (with -EINTR), in which case the tick + 1 must also
be taken into account. Otherwise the nxsem_tickwait_uninterruptible may
wake up 1 tick too early.
Also fix the nxsem_tickwait to return with -ETIMEDOUT if called with delay 0.
This is similar to e.g. posix sem_timedwait.
Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
1. extract dump from assert main flow
2. use OSINIT_PANIC for fatal error.
3. fix the method to judge kernel thread.
Signed-off-by: xuxingliang <xuxingliang@xiaomi.com>
1.nxsem_post wake up nxsched_smp_call;
2.stack smp_call_data_s may return;
3.nxsched_smp_call_handler access call_data->lock is not safety;
so adjust the unlock order
Signed-off-by: dulibo1 <dulibo1@xiaomi.com>
1. mainly for long time within critical_section
2. move out memcpy buffer from enter_critical_section()
3. let mq_send() return fail when mq buffer full in ISR
Signed-off-by: ligd <liguiding1@xiaomi.com>
LD: nuttx.elf
ld: /home/ligd/platform/mainline/nuttx/staging/libsched.a(mq_sndinternal.o): in function `wd_start_realtime':
/home/ligd/platform/mainline/nuttx/include/nuttx/wdog.h:274: undefined reference to `clock_realtime2absticks'
/home/ligd/platform/mainline/nuttx/include/nuttx/wdog.h:274:(.text+0xad): relocation truncated to fit: R_X86_64_PLT32 against undefined symbol `clock_realtime2absticks'
ld: /home/ligd/platform/mainline/nuttx/staging/libsched.a(mq_rcvinternal.o): in function `wd_start_realtime':
/home/ligd/platform/mainline/nuttx/include/nuttx/wdog.h:274: undefined reference to `clock_realtime2absticks'
/home/ligd/platform/mainline/nuttx/include/nuttx/wdog.h:274:(.text+0xad): relocation truncated to fit: R_X86_64_PLT32 against undefined symbol `clock_realtime2absticks'
make[1]: *** [Makefile:128: nuttx.elf] Error 1
make: *** [tools/Unix.mk:551: nuttx.elf] Error 2
Signed-off-by: ligd <liguiding1@xiaomi.com>
The feature depends on ARCH_USE_SEPARATED_SECTION
the different memory area has different access speed and cache
capability, so the arch can custom allocate them based on
section names to achieve performance optimization
test:
sim:elf
sim:sotest
Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
reason:
Currently, if we need to schedule a task to another CPU, we have to completely halt the other CPU,
manipulate the scheduling linked list, and then resume the operation of that CPU. This process is both time-consuming and unnecessary.
During this process, both the current CPU and the target CPU are inevitably subjected to busyloop.
The improved strategy is to simply send a cross-core interrupt to the target CPU.
The current CPU continues to run while the target CPU responds to the interrupt, eliminating the certainty of a busyloop occurring.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
Signed-off-by: dulibo1 <dulibo1@xiaomi.com>
1.call_data->refcount is not remote_cpus;
2.nxsched_smp_call_add enqueue the call_data;
3.maybe nxsched_smp_call_handler is just doing;
4.dequeue the call_data but call_data->refcount is not corret;
5.unpredictability case will occur;
reason:
1In the scenario of active waiting, context switching is inevitable, and we can eliminate redundant judgments.
code size
before
hujun5@hujun5-OptiPlex-7070:~/downloads1/vela_sim/nuttx$ size nuttx
text data bss dec hex filename
262848 49985 63893 376726 5bf96 nuttx
after
hujun5@hujun5-OptiPlex-7070:~/downloads1/vela_sim/nuttx$ size nuttx
text data bss dec hex filename
263324 49985 63893 377202 5c172 nuttx
reduce code size by -476
Configuring NuttX and compile:
$ ./tools/configure.sh -l qemu-armv8a:nsh_smp
$ make
Running with qemu
$ qemu-system-aarch64 -cpu cortex-a53 -smp 4 -nographic \
-machine virt,virtualization=on,gic-version=3 \
-net none -chardev stdio,id=con,mux=on -serial chardev:con \
-mon chardev=con,mode=readline -kernel ./nuttx
Signed-off-by: hujun5 <hujun5@xiaomi.com>
This commit simplified thread ID dispatching logic by integrating it into the `nxsig_dispatch` function.
Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
