static ucs_status_t ucp_tag_eager_contig_short(uct_pending_req_t *self)
{
ucp_request_t *req = ucs_container_of(self, ucp_request_t, send.uct);
ucp_ep_t *ep = req->send.ep;
ucs_status_t status;
req->send.lane = ucp_ep_get_am_lane(ep);
status = uct_ep_am_short(ep->uct_eps[req->send.lane], UCP_AM_ID_EAGER_ONLY,
req->send.tag.tag, req->send.buffer, req->send.length);
if (status != UCS_OK) {
return status;
}
ucp_request_complete_send(req, UCS_OK);
return UCS_OK;
}
ucs_status_t ucp_tag_send(ucp_ep_h ep, const void *buffer, size_t length,
ucp_tag_t tag)
{
ucp_worker_h worker = ep->worker;
ucs_status_t status;
retry:
if (ucs_likely(length < ep->config.max_short_tag)) {
UCS_STATIC_ASSERT(sizeof(ucp_tag_t) == sizeof(uint64_t));
status = uct_ep_am_short(ep->uct_ep, UCP_AM_ID_EAGER_ONLY, tag,
buffer, length);
if (status == UCS_ERR_NO_RESOURCE) {
ucp_worker_progress(worker);
goto retry;
}
return status;
}
ucs_fatal("unsupported");
}
int main(int argc, char **argv)
{
/* MPI is initially used to swap the endpoint and interface addresses so each
* process has knowledge of the others. */
int partner;
int size, rank;
uct_device_addr_t *own_dev, *peer_dev;
uct_iface_addr_t *own_iface, *peer_iface;
uct_ep_addr_t *own_ep, *peer_ep;
ucs_status_t status; /* status codes for UCS */
uct_ep_h ep; /* Remote endpoint */
ucs_async_context_t async; /* Async event context manages times and fd notifications */
uint8_t id = 0;
void *arg;
const char *tl_name = NULL;
const char *dev_name = NULL;
struct iface_info if_info;
int exit_fail = 1;
optind = 1;
if (3 == argc) {
dev_name = argv[1];
tl_name = argv[2];
} else {
printf("Usage: %s (<dev-name> <tl-name>)\n", argv[0]);
fflush(stdout);
return 1;
}
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &size);
if (size < 2) {
fprintf(stderr, "Failed to create enough mpi processes\n");
goto out;
}
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
if (0 == rank) {
partner = 1;
} else if (1 == rank) {
partner = 0;
} else {
/* just wait for other processes in MPI_Finalize */
exit_fail = 0;
goto out;
}
/* Initialize context */
status = ucs_async_context_init(&async, UCS_ASYNC_MODE_THREAD);
CHKERR_JUMP(UCS_OK != status, "init async context", out);
/* Create a worker object */
status = uct_worker_create(&async, UCS_THREAD_MODE_SINGLE, &if_info.worker);
CHKERR_JUMP(UCS_OK != status, "create worker", out_cleanup_async);
/* Search for the desired transport */
status = dev_tl_lookup(dev_name, tl_name, &if_info);
CHKERR_JUMP(UCS_OK != status, "find supported device and transport", out_destroy_worker);
/* Expect that addr len is the same on both peers */
own_dev = (uct_device_addr_t*)calloc(2, if_info.attr.device_addr_len);
CHKERR_JUMP(NULL == own_dev, "allocate memory for dev addrs", out_destroy_iface);
peer_dev = (uct_device_addr_t*)((char*)own_dev + if_info.attr.device_addr_len);
own_iface = (uct_iface_addr_t*)calloc(2, if_info.attr.iface_addr_len);
CHKERR_JUMP(NULL == own_iface, "allocate memory for if addrs", out_free_dev_addrs);
peer_iface = (uct_iface_addr_t*)((char*)own_iface + if_info.attr.iface_addr_len);
/* Get device address */
status = uct_iface_get_device_address(if_info.iface, own_dev);
CHKERR_JUMP(UCS_OK != status, "get device address", out_free_if_addrs);
MPI_Sendrecv(own_dev, if_info.attr.device_addr_len, MPI_BYTE, partner, 0,
peer_dev, if_info.attr.device_addr_len, MPI_BYTE, partner,0,
MPI_COMM_WORLD, MPI_STATUS_IGNORE);
status = uct_iface_is_reachable(if_info.iface, peer_dev, NULL);
CHKERR_JUMP(0 == status, "reach the peer", out_free_if_addrs);
/* Get interface address */
if (if_info.attr.cap.flags & UCT_IFACE_FLAG_CONNECT_TO_IFACE) {
status = uct_iface_get_address(if_info.iface, own_iface);
CHKERR_JUMP(UCS_OK != status, "get interface address", out_free_if_addrs);
MPI_Sendrecv(own_iface, if_info.attr.iface_addr_len, MPI_BYTE, partner, 0,
peer_iface, if_info.attr.iface_addr_len, MPI_BYTE, partner,0,
MPI_COMM_WORLD, MPI_STATUS_IGNORE);
}
/* Again, expect that ep addr len is the same on both peers */
own_ep = (uct_ep_addr_t*)calloc(2, if_info.attr.ep_addr_len);
CHKERR_JUMP(NULL == own_ep, "allocate memory for ep addrs", out_free_if_addrs);
peer_ep = (uct_ep_addr_t*)((char*)own_ep + if_info.attr.ep_addr_len);
if (if_info.attr.cap.flags & UCT_IFACE_FLAG_CONNECT_TO_EP) {
/* Create new endpoint */
status = uct_ep_create(if_info.iface, &ep);
CHKERR_JUMP(UCS_OK != status, "create endpoint", out_free_ep_addrs);
/* Get endpoint address */
status = uct_ep_get_address(ep, own_ep);
CHKERR_JUMP(UCS_OK != status, "get endpoint address", out_free_ep);
}
MPI_Sendrecv(own_ep, if_info.attr.ep_addr_len, MPI_BYTE, partner, 0,
peer_ep, if_info.attr.ep_addr_len, MPI_BYTE, partner, 0,
MPI_COMM_WORLD, MPI_STATUS_IGNORE);
if (if_info.attr.cap.flags & UCT_IFACE_FLAG_CONNECT_TO_EP) {
/* Connect endpoint to a remote endpoint */
status = uct_ep_connect_to_ep(ep, peer_dev, peer_ep);
MPI_Barrier(MPI_COMM_WORLD);
} else if (if_info.attr.cap.flags & UCT_IFACE_FLAG_CONNECT_TO_IFACE) {
/* Create an endpoint which is connected to a remote interface */
status = uct_ep_create_connected(if_info.iface, peer_dev, peer_iface, &ep);
} else {
status = UCS_ERR_UNSUPPORTED;
}
CHKERR_JUMP(UCS_OK != status, "connect endpoint", out_free_ep);
/*Set active message handler */
status = uct_iface_set_am_handler(if_info.iface, id, hello_world, arg, UCT_AM_CB_FLAG_SYNC);
CHKERR_JUMP(UCS_OK != status, "set callback", out_free_ep);
if (0 == rank) {
uint64_t header;
char payload[8];
unsigned length = sizeof(payload);
/* Send active message to remote endpoint */
status = uct_ep_am_short(ep, id, header, payload, length);
CHKERR_JUMP(UCS_OK != status, "send active msg", out_free_ep);
} else if (1 == rank) {
while (holder) {
/* Explicitly progress any outstanding active message requests */
uct_worker_progress(if_info.worker);
}
}
/* Everything is fine, we need to call MPI_Finalize rather than MPI_Abort */
exit_fail = 0;
out_free_ep:
uct_ep_destroy(ep);
out_free_ep_addrs:
free(own_ep);
out_free_if_addrs:
free(own_iface);
out_free_dev_addrs:
free(own_dev);
out_destroy_iface:
uct_iface_close(if_info.iface);
uct_md_close(if_info.pd);
out_destroy_worker:
uct_worker_destroy(if_info.worker);
out_cleanup_async:
ucs_async_context_cleanup(&async);
out:
(0 == exit_fail) ? MPI_Finalize() : MPI_Abort(MPI_COMM_WORLD, 1);
return exit_fail;
}
int main(int argc, char **argv)
{
/* MPI is initially used to swap the endpoint and interface addresses so each
* process has knowledge of the others. */
MPI_Status mpi_status;
int partner;
int size;
struct sockaddr *ep_addr; /* Endpoint address */
struct sockaddr *iface_addr; /* Interface address */
ucs_status_t status; /* status codes for UCS */
ucs_thread_mode_t thread_mode = UCS_THREAD_MODE_SINGLE; /* Specifies thread sharing mode of an object */
uct_ep_h ep; /* Remote endpoint */
void *arg;
MPI_Init(NULL, NULL);
MPI_Comm_size(MPI_COMM_WORLD, &size);
if (size < 2) {
fprintf(stderr, "Failed to create enough mpi processes.\n");fflush(stderr);
return 1;
}
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
if (0 == rank) {
partner = 1;
} else if (1 == rank) {
partner = 0;
} else {
MPI_Finalize();
return 0;
}
/* Initialize context */
status = ucs_async_context_init(&async, UCS_ASYNC_MODE_THREAD);
if (UCS_OK != status) {
fprintf(stderr, "Failed to init async context.\n");fflush(stderr);
goto out;
}
/* Create a worker object */
status = uct_worker_create(&async, thread_mode, &worker);
if (UCS_OK != status) {
fprintf(stderr, "Failed to create worker.\n");fflush(stderr);
goto out_cleanup_async;
}
/* The device and tranport names are determined by latency */
status = dev_tl_lookup();
if (UCS_OK != status) {
fprintf(stderr, "Failed to find supported device and transport\n");fflush(stderr);
goto out_destroy_worker;
}
iface_addr = calloc(1, iface_attr.iface_addr_len);
ep_addr = calloc(1, iface_attr.ep_addr_len);
if ((NULL == iface_addr) || (NULL == ep_addr)) {
goto out_destroy_iface;
}
/* Get interface address */
status = uct_iface_get_address(iface, iface_addr);
if (UCS_OK != status) {
fprintf(stderr, "Failed to get interface address.\n");fflush(stderr);
goto out_free;
}
if (iface_attr.cap.flags & UCT_IFACE_FLAG_CONNECT_TO_EP) {
/* Create new endpoint */
status = uct_ep_create(iface, &ep);
if (UCS_OK != status) {
fprintf(stderr, "Failed to create endpoint.\n");fflush(stderr);
goto out_free;
}
/* Get endpoint address */
status = uct_ep_get_address(ep, ep_addr);
if (UCS_OK != status) {
fprintf(stderr, "Failed to get endpoint address.\n");fflush(stderr);
goto out_free_ep;
}
}
/* Communicate interface and endpoint addresses to corresponding process */
MPI_Send(iface_addr, iface_attr.iface_addr_len, MPI_BYTE, partner, 0, MPI_COMM_WORLD);
MPI_Recv(iface_addr, iface_attr.iface_addr_len, MPI_BYTE, partner, 0, MPI_COMM_WORLD, &mpi_status);
MPI_Send(ep_addr, iface_attr.ep_addr_len, MPI_BYTE, partner, 0, MPI_COMM_WORLD);
MPI_Recv(ep_addr, iface_attr.ep_addr_len, MPI_BYTE, partner, 0, MPI_COMM_WORLD, &mpi_status);
if (iface_attr.cap.flags & UCT_IFACE_FLAG_CONNECT_TO_EP) {
/* Connect endpoint to a remote endpoint */
status = uct_ep_connect_to_ep(ep, ep_addr);
} else if (iface_attr.cap.flags & UCT_IFACE_FLAG_CONNECT_TO_IFACE) {
/* Create an endpoint which is connected to a remote interface */
status = uct_ep_create_connected(iface, iface_addr, &ep);
} else status = UCS_ERR_UNSUPPORTED;
if (UCS_OK != status) {
fprintf(stderr, "Failed to connect endpoint\n");fflush(stderr);
goto out_free_ep;
}
uint8_t id = 0; /* Tag for active message */
/*Set active message handler */
status = uct_iface_set_am_handler(iface, id, hello_world, arg);
if (UCS_OK != status) {
fprintf(stderr, "Failed to set callback.\n");fflush(stderr);
goto out_free_ep;
}
if (0 == rank) {
uint64_t header;
char payload[8];
unsigned length = sizeof(payload);
/* Send active message to remote endpoint */
status = uct_ep_am_short(ep, id, header, payload, length);
} else if (1 == rank) {
while (holder) {
/* Explicitly progress any outstanding active message requests */
uct_worker_progress(worker);
}
}
out_free_ep:
uct_ep_destroy(ep);
out_free:
free(iface_addr);
free(ep_addr);
out_destroy_iface:
uct_iface_close(iface);
uct_pd_close(pd);
out_destroy_worker:
uct_worker_destroy(worker);
out_cleanup_async:
ucs_async_context_cleanup(&async);
out:
MPI_Finalize();
return 0;
}