3863 如果cmd不等于Second argument to futex syscall 且cmd不等于FUTEX_WAIT_BITSET且cmd不等于FUTEX_WAIT_REQUEUE_PI则返回:负ENOSYS 3868 当:cmd恒等于FUTEX_LOCK_PI 3869 当:cmd恒等于FUTEX_UNLOCK_PI 3870 当:cmd恒等于FUTEX_TRYLOCK_PI 3871 当:cmd恒等于FUTEX_WAIT_REQUEUE_PI 3872 当:cmd恒等于...
/* * tsk->flags are checked in the futex code to protect against * an exiting task cleaning up the robust pi futexes. */ /* 内存屏障,用于确保在它之后的操作开始执行之前,它之前的操作已经完成 */ smp_mb(); /* 一直等待,直到获得current->pi_lock自旋锁 */ raw_spin_unlock_wait(&tsk->...
PID TID CLS RTPRIO NI PRI PSR %CPU STAT WCHAN COMMAND 153 153 RR 99 - 139 6 0.0 SLsl futex_wait_que multipathd 可以看到确实是实时进程。 下面手动将这个进程加到根cgroup下: root@ubuntu-vm:/sys/fs/cgroup# cat /proc/153/cgroup 0::/system.slice/multipathd.service root@ubuntu-vm:/sys/fs...
RT-mutexes与优先级继承一起使用,以支持PI-futexes,从而使pthread_mutex_t支持优先级继承属性(PTHREAD_PRIO_INHERIT)。[有关PI-futexes的更多详细信息,请参见轻量级PI-futexes。] 这项技术是在-rt树中开发的,并针对pthread_mutex支持进行了优化。 基本原则: RT-mutexes通过优先级继承协议扩展了简单互斥锁的语义。
Correção da validação de tempo limite em muitas chamadas do sistema (futex, semtimedop, ppoll, sigtimedwait, itimer, timer_create) Adicionado suporte a eventfd EFD_SEMAPHORE [GH 452] Correções e melhorias adicionaisResultados do LTP:Número...
* an exiting task cleaning up the robust pi futexes. */ /* 内存屏障,用于确保在它之后的操作开始执行之前,它之前的操作已经完成 */ smp_mb(); /* 一直等待,直到获得current->pi_lock自旋锁 */ raw_spin_unlock_wait(&tsk->pi_lock);
[pid 16096] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) [pid 16096] futex(0x28a9068, FUTEX_WAKE_PRIVATE, 1) = 0 [pid 16096] futex(0x28a9094, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 8469, {1433198658, 459420000}, ffffffff) = -1 ETIMEDOUT (Connection timed...
futex(0x1a77734, FUTEX_WAIT_PRIVATE, 0, NULLstrace: Process 4320 detached<detached ...> root@sonicwall-virtual-machine:~/sonicos-base# strace -p 4340strace: Process 4340 attachedrestart_syscall(<... resuming interrupted poll ...>) = 0wait4(4341, 0x7ffd9ef3d0cc, WNOHANG, NULL) =...
CONFIG_FUTEX=y CONFIG_FUTEX_PI=y CONFIG_EPOLL=y CONFIG_SIGNALFD=y CONFIG_TIMERFD=y CONFIG_EVENTFD=y CONFIG_SHMEM=y CONFIG_AIO=y CONFIG_IO_URING=y CONFIG_ADVISE_SYSCALLS=y CONFIG_MEMBARRIER=y CONFIG_KALLSYMS=y # CONFIG_KALLSYMS_ALL is not set ...
// timers.waitnote can be used to wakeup this goroutine with notewakeup. timers.sleeping = true noteclear(&timers.waitnote) unlock(&timers.lock) notetsleepg(&timers.waitnote, delta) } } There are two variables which I think deserve explanation: rescheduling and sleeping. They both indicate...