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proto_am.inl
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/**
* Copyright (C) Mellanox Technologies Ltd. 2001-2020. ALL RIGHTS RESERVED.
*
* See file LICENSE for terms.
*/
#ifndef UCP_PROTO_AM_INL_
#define UCP_PROTO_AM_INL_
#include "proto_am.h"
#include <ucp/core/ucp_context.h>
#include <ucp/core/ucp_request.h>
#include <ucp/core/ucp_request.inl>
#include <ucp/core/ucp_ep.inl>
#include <ucp/tag/eager.h>
#include <ucp/dt/dt.h>
#include <ucs/profile/profile.h>
#define UCP_STATUS_PENDING_SWITCH (UCS_ERR_LAST - 1)
typedef void (*ucp_req_complete_func_t)(ucp_request_t *req, ucs_status_t status);
static UCS_F_ALWAYS_INLINE ucs_status_t
ucp_do_am_bcopy_single(uct_pending_req_t *self, uint8_t am_id,
uct_pack_callback_t pack_cb)
{
ucp_request_t *req = ucs_container_of(self, ucp_request_t, send.uct);
ucp_ep_t *ep = req->send.ep;
ucp_dt_state_t state = req->send.state.dt;
ssize_t packed_len;
req->send.lane = ucp_ep_get_am_lane(ep);
packed_len = uct_ep_am_bcopy(ep->uct_eps[req->send.lane], am_id, pack_cb,
req, 0);
if (ucs_unlikely(packed_len < 0)) {
/* Reset the state to the previous one */
req->send.state.dt = state;
return (ucs_status_t)packed_len;
}
ucs_assertv((size_t)packed_len <= ucp_ep_get_max_bcopy(ep, req->send.lane),
"packed_len=%zd max_bcopy=%zu",
packed_len, ucp_ep_get_max_bcopy(ep, req->send.lane));
return UCS_OK;
}
static UCS_F_ALWAYS_INLINE
ucs_status_t ucp_do_am_bcopy_multi(uct_pending_req_t *self, uint8_t am_id_first,
uint8_t am_id_middle,
uct_pack_callback_t pack_first,
uct_pack_callback_t pack_middle,
int enable_am_bw)
{
ucp_request_t *req = ucs_container_of(self, ucp_request_t, send.uct);
ucp_ep_t *ep = req->send.ep;
ucp_dt_state_t state = req->send.state.dt;
ssize_t packed_len;
uct_ep_h uct_ep;
int pending_add_res;
req->send.lane = (!enable_am_bw || (state.offset == 0)) ? /* first part of message must be sent */
ucp_ep_get_am_lane(ep) : /* via AM lane */
ucp_send_request_get_am_bw_lane(req);
uct_ep = ep->uct_eps[req->send.lane];
for (;;) {
if (state.offset == 0) {
/* First */
packed_len = uct_ep_am_bcopy(uct_ep, am_id_first, pack_first, req, 0);
UCS_PROFILE_REQUEST_EVENT_CHECK_STATUS(req, "am_bcopy_first",
packed_len, packed_len);
} else {
ucs_assert(state.offset < req->send.length);
/* Middle or last */
packed_len = uct_ep_am_bcopy(uct_ep, am_id_middle, pack_middle, req, 0);
UCS_PROFILE_REQUEST_EVENT_CHECK_STATUS(req, "am_bcopy_middle",
packed_len, packed_len);
}
if (ucs_unlikely(packed_len < 0)) {
/* Reset the state to the previous one */
req->send.state.dt = state;
if ((packed_len == UCS_ERR_NO_RESOURCE) &&
(req->send.lane != req->send.pending_lane)) {
/* switch to new pending lane */
pending_add_res = ucp_request_pending_add(req, 0);
if (!pending_add_res) {
/* failed to switch req to pending queue, try again */
continue;
}
return (ucs_status_t)UCP_STATUS_PENDING_SWITCH;
} else {
return (ucs_status_t)packed_len;
}
} else {
ucs_assertv(/* The packed length has to be the same as maximum
* AM Bcopy for the first and middle segments */
((req->send.state.dt.offset < req->send.length) &&
(packed_len == ucp_ep_get_max_bcopy(ep, req->send.lane))) ||
/* The packed length has to be the same or less than
* maximum AM Bcopy for the last segment */
(packed_len <= ucp_ep_get_max_bcopy(ep, req->send.lane)),
"packed_len=%zd max_bcopy=%zu",
packed_len, ucp_ep_get_max_bcopy(ep, req->send.lane));
ucs_assertv(req->send.state.dt.offset <= req->send.length,
"offset=%zd length=%zu",
req->send.state.dt.offset, req->send.length);
/* If the last segment was sent, return UCS_OK,
* otherwise - UCS_INPROGRESS */
if (enable_am_bw) {
ucp_send_request_next_am_bw_lane(req);
}
return ((req->send.state.dt.offset < req->send.length) ?
UCS_INPROGRESS : UCS_OK);
}
}
}
static UCS_F_ALWAYS_INLINE
size_t ucp_dt_iov_copy_iov_uct(uct_iov_t *iov, size_t *iovcnt,
size_t max_dst_iov, ucp_dt_state_t *state,
const ucp_dt_iov_t *src_iov, size_t length_max,
ucp_md_index_t md_index, uint64_t md_flags)
{
size_t length_it = 0;
size_t iov_offset, max_src_iov, src_it, dst_it;
ucp_md_index_t memh_index;
iov_offset = state->dt.iov.iov_offset;
max_src_iov = state->dt.iov.iovcnt;
src_it = state->dt.iov.iovcnt_offset;
dst_it = 0;
state->dt.iov.iov_offset = 0;
while ((dst_it < max_dst_iov) && (src_it < max_src_iov)) {
if (src_iov[src_it].length != 0) {
iov[dst_it].buffer = UCS_PTR_BYTE_OFFSET(src_iov[src_it].buffer,
iov_offset);
iov[dst_it].length = src_iov[src_it].length - iov_offset;
if (md_flags & UCT_MD_FLAG_NEED_MEMH) {
ucs_assert(state->dt.iov.dt_reg != NULL);
memh_index = ucs_bitmap2idx(state->dt.iov.dt_reg[src_it].md_map,
md_index);
iov[dst_it].memh = state->dt.iov.dt_reg[src_it].memh[memh_index];
} else {
ucs_assert(state->dt.iov.dt_reg == NULL);
iov[dst_it].memh = UCT_MEM_HANDLE_NULL;
}
iov[dst_it].stride = 0;
iov[dst_it].count = 1;
length_it += iov[dst_it].length;
++dst_it;
if (length_it >= length_max) {
iov[dst_it - 1].length -= (length_it - length_max);
length_it = length_max;
state->dt.iov.iov_offset = iov_offset + iov[dst_it - 1].length;
break;
}
}
iov_offset = 0;
++src_it;
}
state->dt.iov.iovcnt_offset = src_it;
*iovcnt = dst_it;
return length_it;
}
static UCS_F_ALWAYS_INLINE
void ucp_dt_iov_copy_uct(ucp_context_h context, uct_iov_t *iov, size_t *iovcnt,
size_t max_dst_iov, ucp_dt_state_t *state,
const ucp_dt_iov_t *src_iov, ucp_datatype_t datatype,
size_t length_max, ucp_md_index_t md_index,
ucp_mem_desc_t *mdesc)
{
uint64_t md_flags = context->tl_mds[md_index].attr.cap.flags;
size_t length_it = 0;
ucp_md_index_t memh_index;
ucs_assert((context->tl_mds[md_index].attr.cap.flags & UCT_MD_FLAG_REG) ||
!(md_flags & UCT_MD_FLAG_NEED_MEMH));
switch (datatype & UCP_DATATYPE_CLASS_MASK) {
case UCP_DATATYPE_CONTIG:
if (md_flags & UCT_MD_FLAG_NEED_MEMH) {
if (mdesc) {
memh_index = ucs_bitmap2idx(mdesc->memh->md_map, md_index);
iov[0].memh = mdesc->memh->uct[memh_index];
} else {
memh_index = ucs_bitmap2idx(state->dt.contig.md_map, md_index);
iov[0].memh = state->dt.contig.memh[memh_index];
}
} else {
iov[0].memh = UCT_MEM_HANDLE_NULL;
}
iov[0].buffer = UCS_PTR_BYTE_OFFSET(src_iov, state->offset);
iov[0].length = length_max;
iov[0].stride = 0;
iov[0].count = 1;
*iovcnt = 1;
length_it = iov[0].length;
break;
case UCP_DATATYPE_IOV:
length_it = ucp_dt_iov_copy_iov_uct(iov, iovcnt, max_dst_iov, state,
src_iov, length_max, md_index,
md_flags);
break;
default:
ucs_error("Invalid data type");
}
state->offset += length_it;
}
static UCS_F_ALWAYS_INLINE
ucs_status_t ucp_am_zcopy_common(ucp_request_t *req, const void *hdr,
size_t hdr_size, ucp_mem_desc_t *user_hdr_desc,
size_t user_hdr_size, uct_iov_t *iov,
size_t max_iov, size_t max_length,
uint8_t am_id, ucp_dt_state_t *state)
{
ucp_ep_t *ep = req->send.ep;
ucp_md_index_t md_idx = ucp_ep_md_index(ep, req->send.lane);
size_t iovcnt = 0ul;
unsigned user_hdr_iov_cnt;
if (user_hdr_size != 0) {
ucs_assert((req->send.length == 0) || (max_length > user_hdr_size));
ucs_assert(max_iov > 1);
iov[0].buffer = user_hdr_desc + 1;
iov[0].length = user_hdr_size;
iov[0].memh = ucp_memh2uct(user_hdr_desc->memh, md_idx);
iov[0].stride = 0;
iov[0].count = 1;
user_hdr_iov_cnt = 1;
} else {
user_hdr_iov_cnt = 0;
}
ucp_dt_iov_copy_uct(ep->worker->context, iov + user_hdr_iov_cnt, &iovcnt,
max_iov - user_hdr_iov_cnt, state, req->send.buffer,
req->send.datatype, max_length - user_hdr_size,
md_idx, NULL);
return uct_ep_am_zcopy(ep->uct_eps[req->send.lane], am_id, (void*)hdr,
hdr_size, iov, iovcnt + user_hdr_iov_cnt, 0,
&req->send.state.uct_comp);
}
static UCS_F_ALWAYS_INLINE ucs_status_t
ucp_am_zcopy_single_handle_status(ucp_request_t *req,
const ucp_dt_state_t *dt_state,
ucs_status_t status,
ucp_req_complete_func_t complete_ok)
{
if (ucs_unlikely(status == UCS_ERR_NO_RESOURCE)) {
return UCS_ERR_NO_RESOURCE;
}
if (status == UCS_OK) {
complete_ok(req, UCS_OK);
} else {
/* IN_PROGRESS also goes here */
ucp_request_send_state_advance(req, dt_state,
UCP_REQUEST_SEND_PROTO_ZCOPY_AM,
status);
}
return UCS_OK;
}
static UCS_F_ALWAYS_INLINE
ucs_status_t ucp_do_am_zcopy_single(uct_pending_req_t *self, uint8_t am_id,
const void *hdr, size_t hdr_size,
ucp_mem_desc_t *user_hdr_desc,
size_t user_hdr_size,
ucp_req_complete_func_t complete)
{
ucp_request_t *req = ucs_container_of(self, ucp_request_t, send.uct);
ucp_ep_t *ep = req->send.ep;
size_t max_iov = ucp_ep_config(ep)->am.max_iov;
uct_iov_t *iov = ucs_alloca(max_iov * sizeof(uct_iov_t));
ucp_dt_state_t state = req->send.state.dt;
ucs_status_t status;
req->send.lane = ucp_ep_get_am_lane(ep);
status = ucp_am_zcopy_common(req, hdr, hdr_size, user_hdr_desc, user_hdr_size,
iov, max_iov, req->send.length + user_hdr_size,
am_id, &state);
return ucp_am_zcopy_single_handle_status(req, &state, status, complete);
}
static UCS_F_ALWAYS_INLINE
void ucp_am_zcopy_complete_last_stage(ucp_request_t *req, ucp_dt_state_t *state,
ucp_req_complete_func_t complete)
{
ucp_request_send_state_advance(req, state,
UCP_REQUEST_SEND_PROTO_ZCOPY_AM,
UCS_OK);
/* Complete a request on a last stage if all previous AM
* Zcopy operations completed successfully. If there are
* operations that are in progress on other lanes, the last
* completed operation will complete the request */
if (req->send.state.uct_comp.count == 0) {
complete(req, UCS_OK);
}
}
static UCS_F_ALWAYS_INLINE
ucs_status_t ucp_do_am_zcopy_multi(uct_pending_req_t *self, uint8_t am_id_first,
uint8_t am_id_middle,
const void *hdr_first, size_t hdr_size_first,
const void *hdr_middle, size_t hdr_size_middle,
ucp_mem_desc_t *user_hdr_desc,
size_t user_hdr_size,
ucp_req_complete_func_t complete,
int enable_am_bw)
{
ucp_request_t *req = ucs_container_of(self, ucp_request_t, send.uct);
ucp_ep_t *ep = req->send.ep;
unsigned flag_iov_mid = 0;
size_t iovcnt = 0;
ucp_dt_state_t state;
size_t max_middle;
size_t max_iov;
uct_iov_t *iov;
size_t offset;
size_t mid_len;
ucs_status_t status;
uct_ep_h uct_ep;
int pending_add_res;
if (enable_am_bw && (req->send.state.dt.offset != 0)) {
req->send.lane = ucp_send_request_get_am_bw_lane(req);
ucp_send_request_add_reg_lane(req, req->send.lane);
} else {
req->send.lane = ucp_ep_get_am_lane(ep);
}
uct_ep = ep->uct_eps[req->send.lane];
max_middle = ucp_ep_get_max_zcopy(ep, req->send.lane) - hdr_size_middle;
max_iov = ucp_ep_get_max_iov(ep, req->send.lane);
iov = ucs_alloca(max_iov * sizeof(uct_iov_t));
for (;;) {
state = req->send.state.dt;
offset = state.offset;
ucs_assert(max_iov > 0);
if (UCP_DT_IS_IOV(req->send.datatype)) {
/* This flag should guarantee middle stage usage if iovcnt exceeded */
flag_iov_mid = ((state.dt.iov.iovcnt_offset + max_iov) <
state.dt.iov.iovcnt);
} else {
ucs_assert(UCP_DT_IS_CONTIG(req->send.datatype));
}
if (offset == 0) {
/* First stage */
ucs_assert(req->send.lane == ucp_ep_get_am_lane(ep));
status = ucp_am_zcopy_common(req, hdr_first, hdr_size_first,
user_hdr_desc, user_hdr_size, iov, max_iov,
max_middle - hdr_size_first + hdr_size_middle,
am_id_first, &state);
ucs_assertv(state.offset != 0, "state must be changed on 1st stage");
ucs_assertv(state.offset < req->send.length, "state.offset=%zu",
state.offset);
UCS_PROFILE_REQUEST_EVENT_CHECK_STATUS(req, "am_zcopy_first",
iov[0].length, status);
} else {
/* Middle or last stage */
mid_len = ucs_min(max_middle, req->send.length - offset);
ucs_assert(offset + mid_len <= req->send.length);
ucp_dt_iov_copy_uct(ep->worker->context, iov, &iovcnt, max_iov, &state,
req->send.buffer, req->send.datatype, mid_len,
ucp_ep_md_index(ep, req->send.lane), NULL);
if (offset < state.offset) {
status = uct_ep_am_zcopy(uct_ep, am_id_middle, (void*)hdr_middle,
hdr_size_middle, iov, iovcnt, 0,
&req->send.state.uct_comp);
} else if (state.offset == req->send.length) {
/* Empty IOVs on last stage */
ucp_am_zcopy_complete_last_stage(req, &state, complete);
return UCS_OK;
} else {
ucs_assert(offset == state.offset);
/* Empty IOVs in the middle */
ucp_request_send_state_advance(req, &state,
UCP_REQUEST_SEND_PROTO_ZCOPY_AM,
UCS_OK);
continue;
}
UCS_PROFILE_REQUEST_EVENT_CHECK_STATUS(req, "am_zcopy_middle",
iov[0].length, status);
if (!flag_iov_mid && (offset + mid_len == req->send.length)) {
/* Last stage */
if (status == UCS_OK) {
ucp_am_zcopy_complete_last_stage(req, &state, complete);
return UCS_OK;
}
ucp_request_send_state_advance(req, &state,
UCP_REQUEST_SEND_PROTO_ZCOPY_AM,
status);
if (!UCS_STATUS_IS_ERR(status)) {
if (enable_am_bw) {
ucp_send_request_next_am_bw_lane(req);
}
return UCS_OK;
}
}
}
if (status == UCS_ERR_NO_RESOURCE) {
if (req->send.lane != req->send.pending_lane) {
/* switch to new pending lane */
pending_add_res = ucp_request_pending_add(req, 0);
if (!pending_add_res) {
/* failed to switch req to pending queue, try again */
continue;
}
return UCS_OK;
}
return UCS_ERR_NO_RESOURCE;
}
ucp_request_send_state_advance(req, &state,
UCP_REQUEST_SEND_PROTO_ZCOPY_AM,
status);
if (UCS_STATUS_IS_ERR(status)) {
if (req->send.state.uct_comp.count == 0) {
complete(req, status);
}
return UCS_OK;
} else {
if (enable_am_bw) {
ucp_send_request_next_am_bw_lane(req);
}
return UCS_INPROGRESS;
}
}
}
static UCS_F_ALWAYS_INLINE size_t
ucp_proto_get_zcopy_threshold(const ucp_request_t *req,
const ucp_ep_msg_config_t *msg_config,
size_t count, size_t max_zcopy)
{
ucp_worker_h worker;
ucp_lane_index_t lane;
ucp_rsc_index_t rsc_index;
size_t zcopy_thresh;
if (ucs_unlikely(msg_config->max_zcopy == 0)) {
return max_zcopy;
}
if (ucs_likely(UCP_DT_IS_CONTIG(req->send.datatype))) {
return ucs_min(max_zcopy, msg_config->mem_type_zcopy_thresh[req->send.mem_type]);
} else if (UCP_DT_IS_IOV(req->send.datatype)) {
if (0 == count) {
/* disable zcopy */
zcopy_thresh = max_zcopy;
} else if (!msg_config->zcopy_auto_thresh) {
/* The user defined threshold or no zcopy enabled */
zcopy_thresh = msg_config->zcopy_thresh[0];
} else if (count <= UCP_MAX_IOV) {
/* Using pre-calculated thresholds */
zcopy_thresh = msg_config->zcopy_thresh[count - 1];
} else {
/* Calculate threshold */
lane = req->send.lane;
rsc_index = ucp_ep_config(req->send.ep)->key.lanes[lane].rsc_index;
worker = req->send.ep->worker;
zcopy_thresh = ucp_ep_config_get_zcopy_auto_thresh(count,
&ucp_ep_md_attr(req->send.ep, lane)->reg_cost,
worker->context,
ucp_worker_iface_bandwidth(worker, rsc_index));
}
return ucs_min(max_zcopy, zcopy_thresh);
} else if (UCP_DT_IS_GENERIC(req->send.datatype)) {
return max_zcopy;
}
ucs_error("Unsupported datatype");
return max_zcopy;
}
static UCS_F_ALWAYS_INLINE ssize_t
ucp_proto_get_short_max(const ucp_request_t *req,
const ucp_ep_msg_config_t *msg_config)
{
return (!UCP_DT_IS_CONTIG(req->send.datatype) ||
(req->flags & UCP_REQUEST_FLAG_SYNC) ||
(!UCP_MEM_IS_HOST(req->send.mem_type))) ?
-1 : msg_config->max_short;
}
static UCS_F_ALWAYS_INLINE int
ucp_proto_is_inline(ucp_ep_h ep, const ucp_memtype_thresh_t *max_eager_short,
ssize_t length)
{
return (ucs_likely(length <= max_eager_short->memtype_off) ||
(length <= max_eager_short->memtype_on &&
ucp_memory_type_cache_is_empty(ep->worker->context)));
}
static UCS_F_ALWAYS_INLINE ucp_request_t*
ucp_proto_ssend_ack_request_alloc(ucp_worker_h worker, ucp_ep_h ep)
{
ucp_request_t *req = ucp_request_get(worker);
if (req == NULL) {
ucs_error("failed to allocate UCP request");
return NULL;
}
req->flags = 0;
req->send.ep = ep;
req->send.uct.func = ucp_proto_progress_am_single;
req->send.proto.comp_cb = ucp_request_put;
req->send.proto.status = UCS_OK;
return req;
}
static UCS_F_ALWAYS_INLINE ucs_status_t
ucp_am_bcopy_handle_status_from_pending(uct_pending_req_t *self, int multi,
int tag_sync, ucs_status_t status)
{
ucp_request_t *req = ucs_container_of(self, ucp_request_t, send.uct);
if (multi) {
if (status == UCS_INPROGRESS) {
return UCS_INPROGRESS;
}
if (ucs_unlikely(status == UCP_STATUS_PENDING_SWITCH)) {
return UCS_OK;
}
} else {
ucs_assert(status != UCS_INPROGRESS);
}
if (ucs_unlikely(status == UCS_ERR_NO_RESOURCE)) {
return UCS_ERR_NO_RESOURCE;
}
ucp_request_send_generic_dt_finish(req);
if (tag_sync) {
ucp_tag_eager_sync_completion(req, UCP_REQUEST_FLAG_LOCAL_COMPLETED,
status);
} else {
ucp_request_complete_send(req, status);
}
return UCS_OK;
}
#endif