int main(int argc, char** argv) { uint32_t vcoreid = vcore_id(); int retval = 0; mcs_barrier_init(&b, max_vcores()); /* begin: stuff userspace needs to do before switching to multi-mode */ vcore_lib_init(); #if 0 /* tell the kernel where and how we want to receive notifications */ struct notif_method *nm; for (int i = 0; i < MAX_NR_NOTIF; i++) { nm = &__procdata.notif_methods[i]; nm->flags |= NOTIF_WANTED | NOTIF_MSG | NOTIF_IPI; nm->vcoreid = i % 2; // vcore0 or 1, keepin' it fresh. } #endif /* Need to save this somewhere that you can find it again when restarting * core0 */ core0_tls = get_tls_desc(0); /* Need to save our floating point state somewhere (like in the * user_thread_tcb so it can be restarted too */ /* end: stuff userspace needs to do before switching to multi-mode */ /* get into multi mode */ retval = vcore_request(1); if (retval) printf("F****d!\n"); printf("Proc %d requesting another vcore\n", getpid()); begin = read_tsc(); retval = vcore_request(1); if (retval) printf("F****d!\n"); while (!core1_up) cpu_relax; end = read_tsc(); printf("Took %llu usec (%llu nsec) to receive 1 core (cold).\n", udiff(begin, end), ndiff(begin, end)); printf("[T]:002:%llu:%llu:1:C.\n", udiff(begin, end), ndiff(begin, end)); core1_up = FALSE; udelay(2000000); printf("Proc %d requesting the vcore again\n", getpid()); begin = read_tsc(); retval = vcore_request(1); if (retval) printf("F****d!\n"); while (!core1_up) cpu_relax(); end = read_tsc(); printf("Took %llu usec (%llu nsec) to receive 1 core (warm).\n", udiff(begin, end), ndiff(begin, end)); printf("[T]:002:%llu:%llu:1:W.\n", udiff(begin, end), ndiff(begin, end)); return 0; }
int main(int argc, char** argv) { /* don't forget to enable notifs on vcore0. if you don't, the kernel will * restart your _S with notifs disabled, which is a path to confusion. */ struct preempt_data *vcpd = &__procdata.vcore_preempt_data[0]; vcpd->notif_enabled = TRUE; mcs_barrier_init(&b, max_vcores()); vcore_request(max_vcores()); printf("not enough vcores, going to try it manually\n"); sys_resource_req(RES_CORES, max_vcores(), 1, REQ_SOFT); printf("We're screwed!\n"); /* should never make it here */ return -1; }
/* to trick uthread_create() */ int main(int argc, char** argv) { uint32_t vcoreid; int retval; /* Initialize our barrier. */ mcs_barrier_init(&b, max_vcores()); /* vcore_context test */ assert(!in_vcore_context()); /* prep indirect ev_q. Note we grab a big one */ indirect_q = get_eventq(EV_MBOX_UCQ); indirect_q->ev_flags = EVENT_IPI; indirect_q->ev_vcore = 1; /* IPI core 1 */ indirect_q->ev_handler = 0; printf("Registering %08p for event type %d\n", indirect_q, EV_FREE_APPLE_PIE); register_kevent_q(indirect_q, EV_FREE_APPLE_PIE); /* handle events: just want to print out what we get. This is just a * quick set of handlers, not a registration for a kevent. */ for (int i = 0; i < MAX_NR_EVENT; i++) register_ev_handler(i, handle_generic, 0); /* Want to use the default ev_ev (which we just overwrote) */ register_ev_handler(EV_EVENT, handle_ev_ev, 0); /* vcore_lib_init() done in vcore_request() now. */ /* Set up event reception. For example, this will allow us to receive an * event and IPI for USER_IPIs on vcore 0. Check event.c for more stuff. * Note you don't have to register for USER_IPIs to receive ones you send * yourself with sys_self_notify(). */ enable_kevent(EV_USER_IPI, 0, EVENT_IPI | EVENT_VCORE_PRIVATE); /* Receive pending preemption events. (though there's no PP handler) */ struct event_queue *ev_q = get_eventq_vcpd(0, EVENT_VCORE_PRIVATE); ev_q->ev_flags = EVENT_IPI | EVENT_VCORE_APPRO; register_kevent_q(ev_q, EV_PREEMPT_PENDING); /* We also receive preemption events, it is set up in uthread.c */ /* Inits a thread for us, though we won't use it. Just a hack to get into * _M mode. Note this requests one vcore for us */ struct uthread dummy = {0}; uthread_2ls_init(&dummy, &ghetto_sched_ops); uthread_mcp_init(); /* Reset the blockon to be the spinner... This is really shitty. Any * blocking calls after we become an MCP and before this will fail. This is * just mhello showing its warts due to trying to work outside uthread.c */ ros_syscall_blockon = __ros_syscall_spinon; if ((vcoreid = vcore_id())) { printf("Should never see me! (from vcore %d)\n", vcoreid); } else { // core 0 temp = 0xdeadbeef; printf("Hello from vcore %d with temp addr = %p and temp = %p\n", vcoreid, &temp, temp); printf("Multi-Goodbye, world, from PID: %d!\n", sys_getpid()); printf("Requesting %d vcores\n", max_vcores() - 1); retval = vcore_request(max_vcores() - 1); /* since we already have 1 */ //retval = vcore_request(5); printf("This is vcore0, right after vcore_request, retval=%d\n", retval); /* vcore_context test */ assert(!in_vcore_context()); } //#if 0 /* test notifying my vcore2 */ udelay(5000000); printf("Vcore 0 self-notifying vcore 2 with notif 4!\n"); struct event_msg msg; msg.ev_type = 4; sys_self_notify(2, 4, &msg, TRUE); udelay(5000000); printf("Vcore 0 notifying itself with notif 6!\n"); msg.ev_type = 6; sys_notify(sys_getpid(), 6, &msg); udelay(1000000); //#endif /* test loop for restarting a uthread_ctx */ if (vcoreid == 0) { int ctr = 0; while(1) { printf("Vcore %d Spinning (%d), temp = %08x!\n", vcoreid, ctr++, temp); udelay(5000000); //exit(0); } } printf("Vcore %d Done!\n", vcoreid); //mcs_barrier_wait(&b,vcore_id()); printf("All Cores Done!\n", vcoreid); while(1); // manually kill from the monitor /* since everyone should cleanup their uthreads, even if they don't plan on * calling their code or want uthreads in the first place. <3 */ uthread_cleanup(&dummy); return 0; }
int main(int argc, char** argv) { uint32_t vcoreid; int retval; mcs_barrier_init(&b, max_vcores()); /* vcore_context test */ assert(!in_vcore_context()); /* prep indirect ev_q. Note we grab a big one */ indirect_q = get_big_event_q(); indirect_q->ev_flags = EVENT_IPI; indirect_q->ev_vcore = 1; /* IPI core 1 */ indirect_q->ev_handler = 0; printf("Registering %08p for event type %d\n", indirect_q, EV_FREE_APPLE_PIE); register_kevent_q(indirect_q, EV_FREE_APPLE_PIE); /* handle events: just want to print out what we get. This is just a * quick set of handlers, not a registration for a kevent. */ for (int i = 0; i < MAX_NR_EVENT; i++) ev_handlers[i] = handle_generic; /* Want to use the default ev_ev (which we just overwrote) */ ev_handlers[EV_EVENT] = handle_ev_ev; /* vcore_init() done in vcore_request() now. */ /* Set up event reception. For example, this will allow us to receive an * event and IPI for USER_IPIs on vcore 0. Check event.c for more stuff. * Note you don't have to register for USER_IPIs to receive ones you send * yourself with sys_self_notify(). */ enable_kevent(EV_USER_IPI, 0, EVENT_IPI); /* Receive pending preemption events. Can also get a MSG if you want. */ struct event_queue *ev_q = get_event_q(); ev_q->ev_flags = EVENT_IPI | EVENT_NOMSG | EVENT_VCORE_APPRO; register_kevent_q(ev_q, EV_PREEMPT_PENDING); /* Makes a thread for us, though we won't use it. Just a hack to get into * _M mode. Note this requests one vcore for us */ uthread_create(dummy, 0); if ((vcoreid = vcore_id())) { printf("Should never see me! (from vcore %d)\n", vcoreid); } else { // core 0 temp = 0xdeadbeef; printf("Hello from vcore %d with temp addr = %p and temp = %p\n", vcoreid, &temp, temp); printf("Multi-Goodbye, world, from PID: %d!\n", sys_getpid()); //retval = sys_resource_req(RES_CORES, 2, 0); printf("Requesting %d vcores\n", max_vcores() - 1); retval = vcore_request(max_vcores() - 1); /* since we already have 1 */ //retval = vcore_request(5); printf("This is vcore0, right after vcore_request, retval=%d\n", retval); /* vcore_context test */ assert(!in_vcore_context()); } /* test notifying my vcore2 */ udelay(5000000); printf("Vcore 0 self-notifying vcore 2 with notif 4!\n"); struct event_msg msg; msg.ev_type = 4; sys_self_notify(2, 4, &msg); udelay(5000000); printf("Vcore 0 notifying itself with notif 3!\n"); msg.ev_type = 3; sys_notify(sys_getpid(), 3, &msg); udelay(1000000); /* test loop for restarting a notif_tf */ if (vcoreid == 0) { int ctr = 0; while(1) { printf("Vcore %d Spinning (%d), temp = %08x!\n", vcoreid, ctr++, temp); udelay(5000000); //exit(0); } } printf("Vcore %d Done!\n", vcoreid); //mcs_barrier_wait(&b,vcore_id()); printf("All Cores Done!\n", vcoreid); while(1); // manually kill from the monitor return 0; }