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 process to the isolated cpuset and all the rest of the processes to the other cpuset. Here is a simple example script that will do it: mkdir /cpuset … Read more
You cannot. taskAffinity is contained by ActivityInfo, which is member of Activity. Source code of Activity public class Activity extends ContextThemeWrapper … … { // set by the thread after the constructor and before // onCreate(Bundle savedInstanceState) is called. @UnsupportedAppUsage /*package*/ ActivityInfo mActivityInfo; } And ActivityInfo has taskAffinity. Source code of ActivityInfo /** * Information … Read more
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); int 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 … Read more
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) { int num_cores = sysconf(_SC_NPROCESSORS_ONLN); if (core_id < 0 || core_id … Read more