affinity

I'm developing an application in c++. One of the components of the application uses Matlab (via the Matlab engine) for data processing. At the same time, a data acquisition system is streaming data to disk. Occasionally, during periods of intensive Matlab processing, the acquisition system crashes. By setting the processor affinity of Matlab to a subset of available processors, this problem is resolved. However, as the application is launched a few times daily, and on multiple machines, manually setting the affinity each time is inconvenient. The trick of setting processor affinity via the

Possible Duplicate: how to set CPU affinity of a particular pthread? Is there a way in Linux to disable one core for all processes except one process? I would like to have one core reserved only and only for my process. Expected behavior is as follows: Processes which will be spawned after my process, should not see this core and use the others. When my process is spawned, all processes which are utilizing this core, should be switched to other cores. Yes, there is. You want to create two cpusets, one with your isolated CPU and the other with all the rest of the CPUs. Assign your special

Activity有四种加载模式：standard(默认)， singleTop， singleTask和 singleInstance。以下逐一举例说明他们的区别： standard：Activity的默认加载方法，即使某个Activity在 Task栈中已经存在，另一个activity通过Intent跳转到该activity，同样会新创建一个实例压入栈中。例如：现在栈的情况为：A B C D，在D这个Activity中通过Intent跳转到D，那么现在的栈情况为： A B C D D 。此时如果栈顶的D通过Intent跳转到B，则栈情况为：A B C D D B。此时如果依次按返回键，D D C B A将会依次弹出栈而显示在界面上。 singleTop：如果某个Activity的Launch mode设置成singleTop，那么当该Activity位于栈顶的时候，再通过Intent跳转到本身这个Activity，则将不会创建一个新的实例压入栈中。例如：现在栈的情况为：A B C D。D的Launch mode设置成了singleTop，那么在D中启动Intent跳转到D，那么将不会新创建一个D的实例压入栈中，此时栈的情况依然为：A B C D。但是如果此时B的模式也是singleTop，D跳转到B，那么则会新建一个B的实例压入栈中，因为此时B不是位于栈顶，此时栈的情况就变成了

I'm trying to set the CPU affinity of threads on Linux. I'd like to know which one of the following approaches is recommended: Get thread id using pthread_self() Set CPU affinity using pthread_setaffinity_np(....) by passing the thread id as an argument Get thread id using the gettid() call Set CPU affinity using sched_setaffinity(....) by passing the thread id in the place of the process id P.S: After setting the CPU affinity, I intend to increase the scheduling priority of the thread. They are not the same . Here are some bits I collected from TLPI (I couldn't find a large-enough block that

I am trying to: Run 16 copies concurrently with processor pinning (2 copies per core) Run 8 copies concurrently with processor pinning (2 copies per core) and flipping processor core to the furthest core after certain function say function 1 finishes. The problem I am facing is how to select the farthest processor. Some friends suggested to use sched_getaffinity and sched_setaffinity but I count not find any good examples. To use sched_setaffinity to make the current process run on core 7 you do this: cpu_set_t my_set; /* Define your cpu_set bit mask. */ CPU_ZERO(&my_set); /* Initialize it all