Hey, my program wants that I've set up the kernel.core_pattern variable and I've tried setting this by many ways. There's only one answer by the system: Read-only file system. My program checks this var by this command: /sbin/sysctl -n kernel.core_pattern How can I change this to...
void __mutex_init(struct mutex *lock, const char *name, struct lock_class_key *key) { atomic_set(&lock->count, 1); spin_lock_init(&lock->wait_lock); INIT_LIST_HEAD(&lock->wait_list); mutex_clear_owner(lock); #ifdef CONFIG_MUTEX_SPIN_ON_OWNER osq_lock_init(&lock->osq); #...
/* Notify drivers */ mutex_lock(&core_lock); bus_for_each_drv(&i2c_bus_type, NULL, adap, __process_new_adapter); mutex_unlock(&core_lock);这一步是对总线上设备探测,这里的回调函数是__process_new_adapter return 0; out_list: mutex_lock(&core_lock); idr_remove(&i2c_adapter_idr, ad...
parameters of a loadable module. Loadable modules, after being loaded into the running kernel, also reveal their parameters in /sys/module/${modulename}/parameters/. Some of these parameters may be changed at runtime by the command "echo -n ${value} > /sys/module/${modulename}/parameters/...
编译内核时,将依次进入init-y、core-y、libs-y、drivers-y和 net-y所列出的目录中执行它们的Makefile,每个子目录都会生成一个built-in.o (libs-y所列目录下,有可能生成lib.a文件)。最后,head-y所表示的文件将和这些built-in.o、lib.a一起被连接成内核映象文件 vmlinux。
The Streaming Multiprocessor (SM) is the core processing unit in the GPU. The SM is optimized for a wide diversity of workloads, including general-purpose computations, deep learning, ray tracing, as well as lighting and shading. The SM is designed to simultaneously execute multiple CTAs. CTAs...
Even if it were possible to associate one element per work item, the program would likely not be able to exploit multicore parallelism. As such, the programmer must choose the workgroup size (WGS), number of workgroups (NWG), and kernel vector size (VS). Figure 5.2 shows how each of ...
We observed a large number of hits in the output and realized the common pattern among these was device drivers mapping a physical address of the IO device in the VA and then immediately unmapping it after performing some operation. A large majority of the output we got from hooking these ...
如果最后一维再小一些,输入就非常小([XBLOCK,RBLOCK=16]),有的CUDA Core就只能摸鱼了。这个时候XBLOCK就不是固定的1,而是由persistent_reduction在[1,8,32,128]里挑一个最快的当XBLOCK。 #fb(torch.empty([32,512,16], device="cuda")) @persistent_reduction( size_hints=[16384, 16], reduction_hint...
/proc/kcore – This file represents the physical memory of the system (in ELF format). Using a debugger and unstrapped kernel binary, it is possible to read and examine the current state of kernel structures. • /proc/meminfo – Reports statistics about memory usage of the system, as we...