tpool_create
g_tpool = tpool_create(1, sysconf(_SC_NPROCESSORS_ONLN),
extern tpool_t *tpool_create(uint_t min_threads, uint_t max_threads,
extern tpool_t *tpool_create();
tcdp->tcd_poolp = tpool_create(1, maxworkers, 20,
t = tpool_create(1, 2 * sysconf(_SC_NPROCESSORS_ONLN),