int odp_cpumask_default_worker(odp_cpumask_t *mask, int num)
{
odp_cpumask_t overlap;
int cpu, i;
/*
* If no user supplied number or it's too large, then attempt
* to use all CPUs
*/
cpu = odp_cpumask_count(&odp_global_data.worker_cpus);
if (0 == num || cpu < num)
num = cpu;
/* build the mask, allocating down from highest numbered CPU */
odp_cpumask_zero(mask);
for (cpu = 0, i = CPU_SETSIZE - 1; i >= 0 && cpu < num; --i) {
if (odp_cpumask_isset(&odp_global_data.worker_cpus, i)) {
odp_cpumask_set(mask, i);
cpu++;
}
}
odp_cpumask_and(&overlap, mask, &odp_global_data.control_cpus);
if (odp_cpumask_count(&overlap))
ODP_DBG("\n\tWorker CPUs overlap with control CPUs...\n"
"\tthis will likely have a performance impact on the worker threads.\n");
return cpu;
}
int odp_cpumask_next(const odp_cpumask_t *mask, int cpu)
{
for (cpu += 1; cpu < CPU_SETSIZE; cpu++)
if (odp_cpumask_isset(mask, cpu))
return cpu;
return -1;
}
int odp_cpumask_last(const odp_cpumask_t *mask)
{
int cpu;
for (cpu = CPU_SETSIZE - 1; cpu >= 0; cpu--)
if (odp_cpumask_isset(mask, cpu))
return cpu;
return -1;
}
int odp_cpumask_first(const odp_cpumask_t *mask)
{
int cpu;
for (cpu = 0; cpu < CPU_SETSIZE; cpu++)
if (odp_cpumask_isset(mask, cpu))
return cpu;
return -1;
}
int odp_cpumask_default_control(odp_cpumask_t *mask, int num)
{
odp_cpumask_t overlap;
int cpu, i;
/*
* If no user supplied number then default to one control CPU.
*/
if (0 == num) {
num = 1;
} else {
/*
* If user supplied number is too large, then attempt
* to use all installed control CPUs
*/
cpu = odp_cpumask_count(&odp_global_data.control_cpus);
if (cpu < num)
num = cpu;
}
/* build the mask, allocating upwards from lowest numbered CPU */
odp_cpumask_zero(mask);
for (cpu = 0, i = 0; i < CPU_SETSIZE && cpu < num; i++) {
if (odp_cpumask_isset(&odp_global_data.control_cpus, i)) {
odp_cpumask_set(mask, i);
cpu++;
}
}
odp_cpumask_and(&overlap, mask, &odp_global_data.worker_cpus);
if (odp_cpumask_count(&overlap))
ODP_DBG("\n\tControl CPUs overlap with worker CPUs...\n"
"\tthis will likely have a performance impact on the worker threads.\n");
return cpu;
}
