#define DSW_PMD_NAME RTE_STR(event_dsw)
-/* Code changes are required to allow more ports. */
#define DSW_MAX_PORTS (64)
#define DSW_MAX_PORT_DEQUEUE_DEPTH (128)
#define DSW_MAX_PORT_ENQUEUE_DEPTH (128)
#define DSW_MAX_EVENTS (16384)
-/* Code changes are required to allow more flows than 32k. */
-#define DSW_MAX_FLOWS_BITS (15)
+/* Multiple 24-bit flow ids will map to the same DSW-level flow. The
+ * number of DSW flows should be high enough make it unlikely that
+ * flow ids of several large flows hash to the same DSW-level flow.
+ * Such collisions will limit parallism and thus the number of cores
+ * that may be utilized. However, configuring a large number of DSW
+ * flows might potentially, depending on traffic and actual
+ * application flow id value range, result in each such DSW-level flow
+ * being very small. The effect of migrating such flows will be small,
+ * in terms amount of processing load redistributed. This will in turn
+ * reduce the load balancing speed, since flow migration rate has an
+ * upper limit. Code changes are required to allow > 32k DSW-level
+ * flows.
+ */
+#define DSW_MAX_FLOWS_BITS (13)
#define DSW_MAX_FLOWS (1<<(DSW_MAX_FLOWS_BITS))
#define DSW_MAX_FLOWS_MASK (DSW_MAX_FLOWS-1)
#define DSW_MIGRATION_INTERVAL (1000)
#define DSW_MIN_SOURCE_LOAD_FOR_MIGRATION (DSW_LOAD_FROM_PERCENT(70))
#define DSW_MAX_TARGET_LOAD_FOR_MIGRATION (DSW_LOAD_FROM_PERCENT(95))
+#define DSW_REBALANCE_THRESHOLD (DSW_LOAD_FROM_PERCENT(3))
#define DSW_MAX_EVENTS_RECORDED (128)
+#define DSW_MAX_FLOWS_PER_MIGRATION (8)
+
/* Only one outstanding migration per port is allowed */
-#define DSW_MAX_PAUSED_FLOWS (DSW_MAX_PORTS)
+#define DSW_MAX_PAUSED_FLOWS (DSW_MAX_PORTS*DSW_MAX_FLOWS_PER_MIGRATION)
/* Enough room for paus request/confirm and unpaus request/confirm for
* all possible senders.
uint64_t total_busy_cycles;
/* For the ctl interface and flow migration mechanism. */
- uint64_t next_migration;
+ uint64_t next_emigration;
uint64_t migration_interval;
enum dsw_migration_state migration_state;
- uint64_t migration_start;
- uint64_t migrations;
- uint64_t migration_latency;
+ uint64_t emigration_start;
+ uint64_t emigrations;
+ uint64_t emigration_latency;
- uint8_t migration_target_port_id;
- struct dsw_queue_flow migration_target_qf;
+ uint8_t emigration_target_port_ids[DSW_MAX_FLOWS_PER_MIGRATION];
+ struct dsw_queue_flow
+ emigration_target_qfs[DSW_MAX_FLOWS_PER_MIGRATION];
+ uint8_t emigration_targets_len;
uint8_t cfm_cnt;
+ uint64_t immigrations;
+
uint16_t paused_flows_len;
struct dsw_queue_flow paused_flows[DSW_MAX_PAUSED_FLOWS];
uint16_t seen_events_idx;
struct dsw_queue_flow seen_events[DSW_MAX_EVENTS_RECORDED];
+ uint64_t enqueue_calls;
uint64_t new_enqueued;
uint64_t forward_enqueued;
uint64_t release_enqueued;
uint64_t queue_enqueued[DSW_MAX_QUEUES];
+ uint64_t dequeue_calls;
uint64_t dequeued;
uint64_t queue_dequeued[DSW_MAX_QUEUES];
/* Estimate of current port load. */
rte_atomic16_t load __rte_cache_aligned;
+ /* Estimate of flows currently migrating to this port. */
+ rte_atomic32_t immigration_load __rte_cache_aligned;
} __rte_cache_aligned;
struct dsw_queue {
#define DSW_CTL_UNPAUS_REQ (1)
#define DSW_CTL_CFM (2)
-/* sizeof(struct dsw_ctl_msg) must be equal or less than
- * sizeof(void *), to fit on the control ring.
- */
struct dsw_ctl_msg {
- uint8_t type:2;
- uint8_t originating_port_id:6;
- uint8_t queue_id;
- uint16_t flow_hash;
-} __rte_packed;
+ uint8_t type;
+ uint8_t originating_port_id;
+ uint8_t qfs_len;
+ struct dsw_queue_flow qfs[DSW_MAX_FLOWS_PER_MIGRATION];
+} __rte_aligned(4);
uint16_t dsw_event_enqueue(void *port, const struct rte_event *event);
uint16_t dsw_event_enqueue_burst(void *port,