From 07d55c418d47630f28cab5a4e837a10e8e96865f Mon Sep 17 00:00:00 2001 From: Timothy McDaniel Date: Wed, 11 Nov 2020 14:26:59 -0600 Subject: [PATCH] event/dlb2: add delayed token pop logic The code contained in this commit was inadvertently omitted when dissecting the dlb2 code base into discrete patches for upstream. Signed-off-by: Timothy McDaniel Reviewed-by: Mike Ximing Chen --- drivers/event/dlb2/dlb2.c | 314 ++++++++++++++++++----------- drivers/event/dlb2/dlb2_selftest.c | 4 +- 2 files changed, 201 insertions(+), 117 deletions(-) diff --git a/drivers/event/dlb2/dlb2.c b/drivers/event/dlb2/dlb2.c index d42e48b875..86724863f2 100644 --- a/drivers/event/dlb2/dlb2.c +++ b/drivers/event/dlb2/dlb2.c @@ -1082,6 +1082,25 @@ error_exit: return ret; } +static inline uint16_t +dlb2_event_enqueue_delayed(void *event_port, + const struct rte_event events[]); + +static inline uint16_t +dlb2_event_enqueue_burst_delayed(void *event_port, + const struct rte_event events[], + uint16_t num); + +static inline uint16_t +dlb2_event_enqueue_new_burst_delayed(void *event_port, + const struct rte_event events[], + uint16_t num); + +static inline uint16_t +dlb2_event_enqueue_forward_burst_delayed(void *event_port, + const struct rte_event events[], + uint16_t num); + static int dlb2_hw_create_ldb_port(struct dlb2_eventdev *dlb2, struct dlb2_eventdev_port *ev_port, @@ -1198,6 +1217,20 @@ dlb2_hw_create_ldb_port(struct dlb2_eventdev *dlb2, qm_port->dequeue_depth = dequeue_depth; qm_port->token_pop_thresh = dequeue_depth; + + /* The default enqueue functions do not include delayed-pop support for + * performance reasons. + */ + if (qm_port->token_pop_mode == DELAYED_POP) { + dlb2->event_dev->enqueue = dlb2_event_enqueue_delayed; + dlb2->event_dev->enqueue_burst = + dlb2_event_enqueue_burst_delayed; + dlb2->event_dev->enqueue_new_burst = + dlb2_event_enqueue_new_burst_delayed; + dlb2->event_dev->enqueue_forward_burst = + dlb2_event_enqueue_forward_burst_delayed; + } + qm_port->owed_tokens = 0; qm_port->issued_releases = 0; @@ -2427,11 +2460,6 @@ dlb2_event_build_hcws(struct dlb2_port *qm_port, case 3: case 2: case 1: - /* At least one QE will be valid, so only zero out three */ - qe[1].cmd_byte = 0; - qe[2].cmd_byte = 0; - qe[3].cmd_byte = 0; - for (i = 0; i < num; i++) { qe[i].cmd_byte = cmd_byte_map[qm_port->is_directed][ev[i].op]; @@ -2452,6 +2480,8 @@ dlb2_event_build_hcws(struct dlb2_port *qm_port, qe[i].u.event_type.sub = ev[i].sub_event_type; } break; + case 0: + break; } } @@ -2578,29 +2608,57 @@ op_check: } static inline uint16_t -dlb2_event_enqueue_burst(void *event_port, - const struct rte_event events[], - uint16_t num) +__dlb2_event_enqueue_burst(void *event_port, + const struct rte_event events[], + uint16_t num, + bool use_delayed) { struct dlb2_eventdev_port *ev_port = event_port; struct dlb2_port *qm_port = &ev_port->qm_port; struct process_local_port_data *port_data; - int i, cnt; + int i; RTE_ASSERT(ev_port->enq_configured); RTE_ASSERT(events != NULL); - cnt = 0; + i = 0; port_data = &dlb2_port[qm_port->id][PORT_TYPE(qm_port)]; - for (i = 0; i < num; i += DLB2_NUM_QES_PER_CACHE_LINE) { + while (i < num) { uint8_t sched_types[DLB2_NUM_QES_PER_CACHE_LINE]; uint8_t queue_ids[DLB2_NUM_QES_PER_CACHE_LINE]; + int pop_offs = 0; int j = 0; + memset(qm_port->qe4, + 0, + DLB2_NUM_QES_PER_CACHE_LINE * + sizeof(struct dlb2_enqueue_qe)); + for (; j < DLB2_NUM_QES_PER_CACHE_LINE && (i + j) < num; j++) { const struct rte_event *ev = &events[i + j]; + int16_t thresh = qm_port->token_pop_thresh; + + if (use_delayed && + qm_port->token_pop_mode == DELAYED_POP && + (ev->op == RTE_EVENT_OP_FORWARD || + ev->op == RTE_EVENT_OP_RELEASE) && + qm_port->issued_releases >= thresh - 1) { + /* Insert the token pop QE and break out. This + * may result in a partial HCW, but that is + * simpler than supporting arbitrary QE + * insertion. + */ + dlb2_construct_token_pop_qe(qm_port, j); + + /* Reset the releases for the next QE batch */ + qm_port->issued_releases -= thresh; + + pop_offs = 1; + j++; + break; + } if (dlb2_event_enqueue_prep(ev_port, qm_port, ev, &sched_types[j], @@ -2611,38 +2669,52 @@ dlb2_event_enqueue_burst(void *event_port, if (j == 0) break; - dlb2_event_build_hcws(qm_port, &events[i], j, + dlb2_event_build_hcws(qm_port, &events[i], j - pop_offs, sched_types, queue_ids); - if (qm_port->token_pop_mode == DELAYED_POP && j < 4 && - qm_port->issued_releases >= qm_port->token_pop_thresh - 1) { - dlb2_construct_token_pop_qe(qm_port, j); - - /* Reset the releases counter for the next QE batch */ - qm_port->issued_releases -= qm_port->token_pop_thresh; - } - dlb2_hw_do_enqueue(qm_port, i == 0, port_data); - cnt += j; + /* Don't include the token pop QE in the enqueue count */ + i += j - pop_offs; - if (j < DLB2_NUM_QES_PER_CACHE_LINE) + /* Don't interpret j < DLB2_NUM_... as out-of-credits if + * pop_offs != 0 + */ + if (j < DLB2_NUM_QES_PER_CACHE_LINE && pop_offs == 0) break; } - if (qm_port->token_pop_mode == DELAYED_POP && - qm_port->issued_releases >= qm_port->token_pop_thresh - 1) { - dlb2_consume_qe_immediate(qm_port, qm_port->owed_tokens); - qm_port->issued_releases -= qm_port->token_pop_thresh; - } - return cnt; + return i; +} + +static uint16_t +dlb2_event_enqueue_burst(void *event_port, + const struct rte_event events[], + uint16_t num) +{ + return __dlb2_event_enqueue_burst(event_port, events, num, false); +} + +static uint16_t +dlb2_event_enqueue_burst_delayed(void *event_port, + const struct rte_event events[], + uint16_t num) +{ + return __dlb2_event_enqueue_burst(event_port, events, num, true); } static inline uint16_t dlb2_event_enqueue(void *event_port, const struct rte_event events[]) { - return dlb2_event_enqueue_burst(event_port, events, 1); + return __dlb2_event_enqueue_burst(event_port, events, 1, false); +} + +static inline uint16_t +dlb2_event_enqueue_delayed(void *event_port, + const struct rte_event events[]) +{ + return __dlb2_event_enqueue_burst(event_port, events, 1, true); } static uint16_t @@ -2650,7 +2722,15 @@ dlb2_event_enqueue_new_burst(void *event_port, const struct rte_event events[], uint16_t num) { - return dlb2_event_enqueue_burst(event_port, events, num); + return __dlb2_event_enqueue_burst(event_port, events, num, false); +} + +static uint16_t +dlb2_event_enqueue_new_burst_delayed(void *event_port, + const struct rte_event events[], + uint16_t num) +{ + return __dlb2_event_enqueue_burst(event_port, events, num, true); } static uint16_t @@ -2658,7 +2738,93 @@ dlb2_event_enqueue_forward_burst(void *event_port, const struct rte_event events[], uint16_t num) { - return dlb2_event_enqueue_burst(event_port, events, num); + return __dlb2_event_enqueue_burst(event_port, events, num, false); +} + +static uint16_t +dlb2_event_enqueue_forward_burst_delayed(void *event_port, + const struct rte_event events[], + uint16_t num) +{ + return __dlb2_event_enqueue_burst(event_port, events, num, true); +} + +static void +dlb2_event_release(struct dlb2_eventdev *dlb2, + uint8_t port_id, + int n) +{ + struct process_local_port_data *port_data; + struct dlb2_eventdev_port *ev_port; + struct dlb2_port *qm_port; + int i; + + if (port_id > dlb2->num_ports) { + DLB2_LOG_ERR("Invalid port id %d in dlb2-event_release\n", + port_id); + rte_errno = -EINVAL; + return; + } + + ev_port = &dlb2->ev_ports[port_id]; + qm_port = &ev_port->qm_port; + port_data = &dlb2_port[qm_port->id][PORT_TYPE(qm_port)]; + + i = 0; + + if (qm_port->is_directed) { + i = n; + goto sw_credit_update; + } + + while (i < n) { + int pop_offs = 0; + int j = 0; + + /* Zero-out QEs */ + qm_port->qe4[0].cmd_byte = 0; + qm_port->qe4[1].cmd_byte = 0; + qm_port->qe4[2].cmd_byte = 0; + qm_port->qe4[3].cmd_byte = 0; + + for (; j < DLB2_NUM_QES_PER_CACHE_LINE && (i + j) < n; j++) { + int16_t thresh = qm_port->token_pop_thresh; + + if (qm_port->token_pop_mode == DELAYED_POP && + qm_port->issued_releases >= thresh - 1) { + /* Insert the token pop QE */ + dlb2_construct_token_pop_qe(qm_port, j); + + /* Reset the releases for the next QE batch */ + qm_port->issued_releases -= thresh; + + pop_offs = 1; + j++; + break; + } + + qm_port->qe4[j].cmd_byte = DLB2_COMP_CMD_BYTE; + qm_port->issued_releases++; + } + + dlb2_hw_do_enqueue(qm_port, i == 0, port_data); + + /* Don't include the token pop QE in the release count */ + i += j - pop_offs; + } + +sw_credit_update: + /* each release returns one credit */ + if (!ev_port->outstanding_releases) { + DLB2_LOG_ERR("%s: Outstanding releases underflowed.\n", + __func__); + return; + } + ev_port->outstanding_releases -= i; + ev_port->inflight_credits += i; + + /* Replenish s/w credits if enough releases are performed */ + dlb2_replenish_sw_credits(dlb2, ev_port); } static inline void @@ -3067,86 +3233,6 @@ dlb2_inc_cq_idx(struct dlb2_port *qm_port, int cnt) qm_port->gen_bit = (~(idx >> qm_port->gen_bit_shift)) & 0x1; } -static int -dlb2_event_release(struct dlb2_eventdev *dlb2, - uint8_t port_id, - int n) -{ - struct process_local_port_data *port_data; - struct dlb2_eventdev_port *ev_port; - struct dlb2_port *qm_port; - int i, cnt; - - if (port_id > dlb2->num_ports) { - DLB2_LOG_ERR("Invalid port id %d in dlb2-event_release\n", - port_id); - rte_errno = -EINVAL; - return rte_errno; - } - - ev_port = &dlb2->ev_ports[port_id]; - qm_port = &ev_port->qm_port; - port_data = &dlb2_port[qm_port->id][PORT_TYPE(qm_port)]; - - cnt = 0; - - if (qm_port->is_directed) { - cnt = n; - goto sw_credit_update; - } - - for (i = 0; i < n; i += DLB2_NUM_QES_PER_CACHE_LINE) { - int j; - - /* Zero-out QEs */ - qm_port->qe4[0].cmd_byte = 0; - qm_port->qe4[1].cmd_byte = 0; - qm_port->qe4[2].cmd_byte = 0; - qm_port->qe4[3].cmd_byte = 0; - - for (j = 0; j < DLB2_NUM_QES_PER_CACHE_LINE && (i + j) < n; j++) - qm_port->qe4[j].cmd_byte = DLB2_COMP_CMD_BYTE; - - qm_port->issued_releases += j; - - if (j == 0) - break; - - if (qm_port->token_pop_mode == DELAYED_POP && j < 4 && - qm_port->issued_releases >= qm_port->token_pop_thresh - 1) { - dlb2_construct_token_pop_qe(qm_port, j); - - /* Reset the releases counter for the next QE batch */ - qm_port->issued_releases -= qm_port->token_pop_thresh; - } - - dlb2_hw_do_enqueue(qm_port, i == 0, port_data); - - cnt += j; - } - - if (qm_port->token_pop_mode == DELAYED_POP && - qm_port->issued_releases >= qm_port->token_pop_thresh - 1) { - dlb2_consume_qe_immediate(qm_port, qm_port->owed_tokens); - qm_port->issued_releases -= qm_port->token_pop_thresh; - } - -sw_credit_update: - /* each release returns one credit */ - if (!ev_port->outstanding_releases) { - DLB2_LOG_ERR("Unrecoverable application error. Outstanding releases underflowed.\n"); - rte_errno = -ENOTRECOVERABLE; - return rte_errno; - } - - ev_port->outstanding_releases -= cnt; - ev_port->inflight_credits += cnt; - - /* Replenish s/w credits if enough releases are performed */ - dlb2_replenish_sw_credits(dlb2, ev_port); - return 0; -} - static inline int16_t dlb2_hw_dequeue_sparse(struct dlb2_eventdev *dlb2, struct dlb2_eventdev_port *ev_port, @@ -3367,8 +3453,7 @@ dlb2_event_dequeue_burst(void *event_port, struct rte_event *ev, uint16_t num, if (ev_port->implicit_release && ev_port->outstanding_releases > 0) { uint16_t out_rels = ev_port->outstanding_releases; - if (dlb2_event_release(dlb2, ev_port->id, out_rels)) - return 0; /* rte_errno is set */ + dlb2_event_release(dlb2, ev_port->id, out_rels); DLB2_INC_STAT(ev_port->stats.tx_implicit_rel, out_rels); } @@ -3405,8 +3490,7 @@ dlb2_event_dequeue_burst_sparse(void *event_port, struct rte_event *ev, if (ev_port->implicit_release && ev_port->outstanding_releases > 0) { uint16_t out_rels = ev_port->outstanding_releases; - if (dlb2_event_release(dlb2, ev_port->id, out_rels)) - return 0; /* rte_errno is set */ + dlb2_event_release(dlb2, ev_port->id, out_rels); DLB2_INC_STAT(ev_port->stats.tx_implicit_rel, out_rels); } diff --git a/drivers/event/dlb2/dlb2_selftest.c b/drivers/event/dlb2/dlb2_selftest.c index f43365458a..5cf66c552c 100644 --- a/drivers/event/dlb2/dlb2_selftest.c +++ b/drivers/event/dlb2/dlb2_selftest.c @@ -1320,7 +1320,7 @@ test_delayed_pop(void) } } - /* Dequeue dequeue_depth events but only release dequeue_depth - 2. + /* Dequeue dequeue_depth events but only release dequeue_depth - 1. * Delayed pop won't perform the pop and no more events will be * scheduled. */ @@ -1336,7 +1336,7 @@ test_delayed_pop(void) ev.op = RTE_EVENT_OP_RELEASE; - for (i = 0; i < port_conf.dequeue_depth - 2; i++) { + for (i = 0; i < port_conf.dequeue_depth - 1; i++) { if (rte_event_enqueue_burst(evdev, 0, &ev, 1) != 1) { printf("%d: RELEASE enqueue expected to succeed\n", __LINE__); -- 2.20.1