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/*
* Copyright (C) Mellanox Technologies Ltd. 2001-2017. ALL RIGHTS RESERVED.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "ompi/mca/osc/osc.h"
#include "ompi/mca/osc/base/base.h"
#include "ompi/mca/osc/base/osc_base_obj_convert.h"
#include "opal/mca/common/ucx/common_ucx.h"
#include "osc_ucx.h"
OBJ_CLASS_INSTANCE(ompi_osc_ucx_lock_t, opal_object_t, NULL, NULL);
static inline int start_shared(ompi_osc_ucx_module_t *module, int target) {
uint64_t result_value = -1;
uint64_t remote_addr = (module->state_addrs)[target] + OSC_UCX_STATE_LOCK_OFFSET;
ucp_ep_h *ep;
OSC_UCX_GET_DEFAULT_EP(ep, module, target);
int ret = OMPI_SUCCESS;
while (true) {
ret = opal_common_ucx_wpmem_fetch(module->state_mem, UCP_ATOMIC_FETCH_OP_FADD, 1,
target, &result_value, sizeof(result_value),
remote_addr, ep);
if (OMPI_SUCCESS != ret) {
return ret;
}
assert((int64_t)result_value >= 0);
if (result_value >= TARGET_LOCK_EXCLUSIVE) {
ret = opal_common_ucx_wpmem_post(module->state_mem,
UCP_ATOMIC_POST_OP_ADD, (-1), target,
sizeof(uint64_t), remote_addr, ep);
if (OMPI_SUCCESS != ret) {
return ret;
}
} else {
break;
}
opal_common_ucx_wpool_progress(mca_osc_ucx_component.wpool);
}
return ret;
}
static inline int end_shared(ompi_osc_ucx_module_t *module, int target) {
uint64_t remote_addr = (module->state_addrs)[target] + OSC_UCX_STATE_LOCK_OFFSET;
ucp_ep_h *ep;
OSC_UCX_GET_DEFAULT_EP(ep, module, target);
return opal_common_ucx_wpmem_post(module->state_mem, UCP_ATOMIC_POST_OP_ADD,
(-1), target, sizeof(uint64_t), remote_addr, ep);
}
static inline int start_exclusive(ompi_osc_ucx_module_t *module, int target) {
uint64_t result_value = -1;
uint64_t remote_addr = (module->state_addrs)[target] + OSC_UCX_STATE_LOCK_OFFSET;
ucp_ep_h *ep;
OSC_UCX_GET_DEFAULT_EP(ep, module, target);
int ret = OMPI_SUCCESS;
for (;;) {
ret = opal_common_ucx_wpmem_cmpswp(module->state_mem,
TARGET_LOCK_UNLOCKED, TARGET_LOCK_EXCLUSIVE,
target, &result_value, sizeof(result_value),
remote_addr, ep);
if (OMPI_SUCCESS != ret) {
return ret;
}
if (result_value == TARGET_LOCK_UNLOCKED) {
return OMPI_SUCCESS;
}
opal_common_ucx_wpool_progress(mca_osc_ucx_component.wpool);
}
}
static inline int end_exclusive(ompi_osc_ucx_module_t *module, int target) {
uint64_t remote_addr = (module->state_addrs)[target] + OSC_UCX_STATE_LOCK_OFFSET;
ucp_ep_h *ep;
OSC_UCX_GET_DEFAULT_EP(ep, module, target);
return opal_common_ucx_wpmem_post(module->state_mem, UCP_ATOMIC_POST_OP_ADD,
-((int64_t)TARGET_LOCK_EXCLUSIVE), target,
sizeof(uint64_t), remote_addr, ep);
}
int ompi_osc_ucx_lock(int lock_type, int target, int mpi_assert, struct ompi_win_t *win) {
ompi_osc_ucx_module_t *module = (ompi_osc_ucx_module_t *)win->w_osc_module;
ompi_osc_ucx_lock_t *lock = NULL;
ompi_osc_ucx_epoch_t original_epoch = module->epoch_type.access;
int ret = OMPI_SUCCESS;
if (module->no_locks) {
OSC_UCX_VERBOSE(1, "attempted to lock with no_locks set");
return OMPI_ERR_RMA_SYNC;
}
if (module->lock_count == 0) {
if (module->epoch_type.access != NONE_EPOCH &&
module->epoch_type.access != FENCE_EPOCH) {
return OMPI_ERR_RMA_SYNC;
}
} else {
ompi_osc_ucx_lock_t *item = NULL;
assert(module->epoch_type.access == PASSIVE_EPOCH);
opal_hash_table_get_value_uint32(&module->outstanding_locks, (uint32_t) target, (void **) &item);
if (item != NULL) {
return OMPI_ERR_RMA_SYNC;
}
}
module->epoch_type.access = PASSIVE_EPOCH;
module->lock_count++;
assert(module->lock_count <= ompi_comm_size(module->comm));
lock = OBJ_NEW(ompi_osc_ucx_lock_t);
lock->target_rank = target;
if ((mpi_assert & MPI_MODE_NOCHECK) == 0) {
lock->is_nocheck = false;
if (lock_type == MPI_LOCK_EXCLUSIVE) {
ret = start_exclusive(module, target);
lock->type = LOCK_EXCLUSIVE;
} else {
ret = start_shared(module, target);
lock->type = LOCK_SHARED;
}
} else {
lock->is_nocheck = true;
if (lock_type == MPI_LOCK_EXCLUSIVE) {
lock->type = LOCK_EXCLUSIVE;
} else {
lock->type = LOCK_SHARED;
}
}
if (ret == OMPI_SUCCESS) {
opal_hash_table_set_value_uint32(&module->outstanding_locks, (uint32_t)target, (void *)lock);
} else {
OBJ_RELEASE(lock);
module->epoch_type.access = original_epoch;
}
return ret;
}
int ompi_osc_ucx_unlock(int target, struct ompi_win_t *win) {
ompi_osc_ucx_module_t *module = (ompi_osc_ucx_module_t *)win->w_osc_module;
ompi_osc_ucx_lock_t *lock = NULL;
int ret = OMPI_SUCCESS;
if (module->epoch_type.access != PASSIVE_EPOCH) {
return OMPI_ERR_RMA_SYNC;
}
opal_hash_table_get_value_uint32(&module->outstanding_locks, (uint32_t) target, (void **) &lock);
if (lock == NULL) {
return OMPI_ERR_RMA_SYNC;
}
ret = opal_common_ucx_ctx_flush(module->ctx, OPAL_COMMON_UCX_SCOPE_WORKER, 0);
if (ret != OMPI_SUCCESS) {
return ret;
}
opal_hash_table_remove_value_uint32(&module->outstanding_locks,
(uint32_t)target);
if (lock->is_nocheck == false) {
if (lock->type == LOCK_EXCLUSIVE) {
ret = end_exclusive(module, target);
} else {
ret = end_shared(module, target);
}
}
OBJ_RELEASE(lock);
module->lock_count--;
assert(module->lock_count >= 0);
if (module->lock_count == 0) {
module->epoch_type.access = NONE_EPOCH;
}
return ret;
}
int ompi_osc_ucx_lock_all(int mpi_assert, struct ompi_win_t *win) {
ompi_osc_ucx_module_t *module = (ompi_osc_ucx_module_t*) win->w_osc_module;
int ret = OMPI_SUCCESS;
if (module->no_locks) {
OSC_UCX_VERBOSE(1, "attempted to lock with no_locks set");
return OMPI_ERR_RMA_SYNC;
}
if (module->epoch_type.access != NONE_EPOCH &&
module->epoch_type.access != FENCE_EPOCH) {
return OMPI_ERR_RMA_SYNC;
}
module->epoch_type.access = PASSIVE_ALL_EPOCH;
if (0 == (mpi_assert & MPI_MODE_NOCHECK)) {
int i, comm_size;
module->lock_all_is_nocheck = false;
comm_size = ompi_comm_size(module->comm);
for (i = 0; i < comm_size; i++) {
ret = start_shared(module, i);
if (ret != OMPI_SUCCESS) {
int j;
for (j = 0; j < i; j++) {
end_shared(module, j);
}
return ret;
}
}
} else {
module->lock_all_is_nocheck = true;
}
assert(OMPI_SUCCESS == ret);
return OMPI_SUCCESS;
}
int ompi_osc_ucx_unlock_all(struct ompi_win_t *win) {
ompi_osc_ucx_module_t *module = (ompi_osc_ucx_module_t*)win->w_osc_module;
int comm_size = ompi_comm_size(module->comm), ret = OMPI_SUCCESS;
if (module->epoch_type.access != PASSIVE_ALL_EPOCH) {
return OMPI_ERR_RMA_SYNC;
}
assert(module->lock_count == 0);
ret = opal_common_ucx_ctx_flush(module->ctx, OPAL_COMMON_UCX_SCOPE_WORKER, 0);
if (ret != OMPI_SUCCESS) {
return ret;
}
if (!module->lock_all_is_nocheck) {
int i;
for (i = 0; i < comm_size; i++) {
ret |= end_shared(module, i);
}
}
module->epoch_type.access = NONE_EPOCH;
return ret;
}
int ompi_osc_ucx_sync(struct ompi_win_t *win) {
ompi_osc_ucx_module_t *module = (ompi_osc_ucx_module_t *)win->w_osc_module;
int ret = OMPI_SUCCESS;
if (module->epoch_type.access != PASSIVE_EPOCH &&
module->epoch_type.access != PASSIVE_ALL_EPOCH) {
return OMPI_ERR_RMA_SYNC;
}
opal_atomic_mb();
ret = opal_common_ucx_wpmem_fence(module->mem);
if (ret != OMPI_SUCCESS) {
OSC_UCX_VERBOSE(1, "opal_common_ucx_mem_fence failed: %d", ret);
}
return ret;
}
int ompi_osc_ucx_flush(int target, struct ompi_win_t *win) {
ompi_osc_ucx_module_t *module = (ompi_osc_ucx_module_t*) win->w_osc_module;
int ret = OMPI_SUCCESS;
if (module->epoch_type.access != PASSIVE_EPOCH &&
module->epoch_type.access != PASSIVE_ALL_EPOCH) {
return OMPI_ERR_RMA_SYNC;
}
ret = opal_common_ucx_ctx_flush(module->ctx, OPAL_COMMON_UCX_SCOPE_EP, target);
if (ret != OMPI_SUCCESS) {
return ret;
}
return OMPI_SUCCESS;
}
int ompi_osc_ucx_flush_all(struct ompi_win_t *win) {
ompi_osc_ucx_module_t *module = (ompi_osc_ucx_module_t *)win->w_osc_module;
int ret = OMPI_SUCCESS;
if (module->epoch_type.access != PASSIVE_EPOCH &&
module->epoch_type.access != PASSIVE_ALL_EPOCH) {
return OMPI_ERR_RMA_SYNC;
}
ret = opal_common_ucx_ctx_flush(module->ctx, OPAL_COMMON_UCX_SCOPE_WORKER, 0);
if (ret != OMPI_SUCCESS) {
return ret;
}
return OMPI_SUCCESS;
}
int ompi_osc_ucx_flush_local(int target, struct ompi_win_t *win) {
/* TODO: currently euqals to ompi_osc_ucx_flush, should find a way
* to implement local completion */
return ompi_osc_ucx_flush(target, win);
}
int ompi_osc_ucx_flush_local_all(struct ompi_win_t *win) {
/* TODO: currently euqals to ompi_osc_ucx_flush_all, should find a way
* to implement local completion */
return ompi_osc_ucx_flush_all(win);
}
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