affinity

How do I assign 2 MPI processes per core? For example, if I do mpirun -np 4 ./application then it should use 2 physical cores to run 4 MPI processes (2 processes per core). I am using Open MPI 1.6. I did mpirun -np 4 -nc 2 ./application but wasn't able to run it. It complains mpirun was unable to launch the specified application as it could not find an executable: Hristo Iliev orterun (the Open MPI SPMD/MPMD launcher; mpirun/mpiexec are just symlinks to it) has some support for process binding but it is not flexible enough to allow you to bind two processes per core. You can try with -bycore

Android 的一个特色就是 application A 的 activity 可以启动 application B 的 activity，尽管 A 和 B 是毫无干系的，而在用户看来，两个场景紧密联系，视觉上二者构成了一个整体。Android 就是把这种误觉定义为 Task，它既不是 class，也不是 AndroidMainifest.xml 中的一个元素。从表现上看 Task 就像是一个 stack，一个一个的 activity 是构成 stack 的元素，做着入栈 (push) 和出栈 (pop-up)这样简单重复性的劳动。 默认的规则总是满足大多数的应用场景，但是也总会有一些例外打破习以为常的惯例。Task 的默认规则同样并非牢不可破，修改的方法还是有的。借助 Intent 中的 flag 和 AndroidMainifest.xml 中 activity 元素的属性，就可以控制到 Task 里 Activity 的关联关系和行为。 在 android.content.Intent 中一共定义了20种不同的 flag，其中和 Task 紧密关联的有四种： 1.FLAG_ACTIVITY_NEW_TASK 2.FLAG_ACTIVITY_CLEAR_TOP 3.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED 4.FLAG_ACTIVITY

Is there a programmatic method to set CPU affinity for a process in c/c++ for the Linux operating system. You need to use sched_setaffinity(2) . For example, to run on CPUs 0 and 2 only: #define _GNU_SOURCE #include <sched.h> cpu_set_t mask; CPU_ZERO(&mask); CPU_SET(0, &mask); CPU_SET(2, &mask); result = sched_setaffinity(0, sizeof(mask), &mask); ( 0 for the first parameter means the current process, supply a PID if it's some other process you want to control). See also sched_getcpu(3) . Use sched_setaffinity at the process level, or pthread_attr_setaffinity_np for individual threads. In short

I'd like to specify the cpu-affinity of a particular pthread. All the references I've found so far deal with setting the cpu-affinity of a process (pid_t) not a thread (pthread_t). I tried some experiments passing pthread_t's around and as expected they fail. Am I trying to do something impossible? If not, can you send a pointer please? Thanks a million. This is a wrapper I've made to make my life easier. Its effect is that the calling thread gets "stuck" to the core with id core_id : // core_id = 0, 1, ... n-1, where n is the system's number of cores int stick_this_thread_to_core(int core_id)

调度方式： 节点选择器： nodeSelector，nodeName 节点亲和调度： nodeAffinity pod亲和调度： podAffinity ♦ kubectl get nodes --show-labels 可以查看节点存在哪些标签 一、节点选择器 ♦ nodeSelector选择的标签需要在node上存在，node才会被选中为pod创建的节点 下图中pod使用了nodeSelector选项过滤包含了gup=9527标签的node，然后pod就创建到了ks-node2上： 二、节点亲和调度 ♦ pod.spec.affinity.nodeAffinity.preferredDuringSchedulingIgnoredDuringExecution 软亲和性，尽量找满足需求的 apiVersion: v1 kind: Pod metadata: name: pod-node-preferaffinity #namespace: develop labels: app: ngx-demo rel: stable spec: containers: - image: nginx imagePullPolicy: IfNotPresent name: nginx-node-preferaffinity affinity: nodeAffinity: