19externunsignedlong__per_cpu_offset[NR_CPUS];2021#defineper_cpu_offset(x) (__per_cpu_offset[x])22#endif my_cpu_offset 30 ～ 37 ,利用 raw_smp_processor_id 得到 当前运行 cpu id [0,1,2,……] ,然后使用 per_cpu_offset 得到 当前cpu 变量区域 的offset . arch_raw_cpu_ptr(ptr) 43 ...
cpu = get_cpu(); y = per_cpu_ptr(&x, cpu); (*y)++; put_cpu(); 请注意,这些操作只能用于为特定处理器保留的per cpu数据。在周围代码中不禁用抢占的情况下,this_cpu_inc()只能保证正确递增一个per cpu计数器。但是,不能保证操作this_cpu指令执行之前或之后OS不会将进程移动。通常情况下,这意味着...
首先要考虑的是:在类对象本身当中不能存储类对象本身的 shared_ptr ,否则类对象 shared_ptr 永远也不会为0了,从而这些资源永远不会释放,除非程序结束。 其次:类对象肯定是外部函数通过某种机制分配的,而且一经分配立即交给 shared_ptr 管理( 再次强调一遍:给 shared_ptr 管理的资源必须在分配时交给 shared_ptr )...
unique_ptr weak_ptr auto_ptr(被 C++11 弃用)Class shared_ptr 实现共享式拥有(shared ownership)概念。多个智能指针指向相同对象,该对象和其相关资源会在 “最后一个 reference 被销毁” 时被释放。为了在结构较复杂的情景中执行上述工作,标准库提供 weak_ptr、bad_weak_ptr 和 enable_shared_from_this 等辅助...
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As the accuracy and speed of the SLAM system also depend on the hardware, we advice you to run the system on a strong CPU. We mainly tested the system using a laptop with i7-3630QM @2.4GHz and 16 GB of RAM running Win 7 x64. So anything above that should be fine. ...
Apple is suggesting we create Ipv6 AAAA and PTR records for all our DCs. Is this the only solution and could it cause issues?AnswerThat’s not the first time Apple has had issues with .local domains and may not be your only problem (here, here, here, etc.). Moreover, it’s not ...
device.type != "cpu" else -1 streams = None if torch.cuda.is_available() and ctx.input_device == -1: # Perform CPU to GPU copies in a background stream # 新建 cuda stream streams = [_get_stream(device) for device in target_gpus] # 真正的操作 outputs = comm.scatter(input, ...
run_metadata_ptr) File "D:\anaconda\envs\tensorflow\lib\site-packages\tensorflow\python\client\session.py", line 1110, in _run feed_dict_tensor, options, run_metadata) File "D:\anaconda\envs\tensorflow\lib\site-packages\tensorflow\python\client\session.py", line 1286, in _do_run ...
The output of the following source code on your PC (bit OS and bit CPU) is( )char*ptr=NULL; cout<<sizeof(ptr)<<endl; 查看完整题目与答案 For your safety sake, we should have a check and hope you cooperate with us.的翻译是“为了您的安全起见,我们需要检查一下,希望您能配合我们。”...