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From: David Marchand <>
Subject: [dpdk-stable] [PATCH v3 1/4] event/dlb2: remove references to deferred scheduling
Date: Fri, 21 May 2021 11:11:34 +0200
Message-ID: <> (raw)
In-Reply-To: <>

From: Timothy McDaniel <>

Deferred scheduling is a DLB v1.0 feature, and is not valid for
DLB v2.0 or v2.5.

Fixes: bc62748bd7d4 ("event/dlb2: add private data structures and constants")
Fixes: a2e4f1f5e79f ("event/dlb2: add dequeue and its burst variants")

Signed-off-by: Timothy McDaniel <>
 doc/guides/eventdevs/dlb2.rst  | 21 ---------------------
 drivers/event/dlb2/dlb2_priv.h |  3 ---
 2 files changed, 24 deletions(-)

diff --git a/doc/guides/eventdevs/dlb2.rst b/doc/guides/eventdevs/dlb2.rst
index 31de6bc470..c60c454d6b 100644
--- a/doc/guides/eventdevs/dlb2.rst
+++ b/doc/guides/eventdevs/dlb2.rst
@@ -293,27 +293,6 @@ The PMD does not support the following configuration sequences:
 This sequence is not supported because the event device must be reconfigured
 before its ports or queues can be.
-Deferred Scheduling
-The DLB PMD's default behavior for managing a CQ is to "pop" the CQ once per
-dequeued event before returning from rte_event_dequeue_burst(). This frees the
-corresponding entries in the CQ, which enables the DLB to schedule more events
-to it.
-To support applications seeking finer-grained scheduling control -- for example
-deferring scheduling to get the best possible priority scheduling and
-load-balancing -- the PMD supports a deferred scheduling mode. In this mode,
-the CQ entry is not popped until the *subsequent* rte_event_dequeue_burst()
-call. This mode only applies to load-balanced event ports with dequeue depth of
-To enable deferred scheduling, use the defer_sched vdev argument like so:
-    .. code-block:: console
-       --vdev=dlb2_event,defer_sched=on
 Atomic Inflights Allocation
diff --git a/drivers/event/dlb2/dlb2_priv.h b/drivers/event/dlb2/dlb2_priv.h
index 3140764a59..b1225af37e 100644
--- a/drivers/event/dlb2/dlb2_priv.h
+++ b/drivers/event/dlb2/dlb2_priv.h
@@ -32,7 +32,6 @@
 #define DLB2_MAX_NUM_EVENTS "max_num_events"
 #define DLB2_NUM_DIR_CREDITS "num_dir_credits"
 #define DEV_ID_ARG "dev_id"
-#define DLB2_DEFER_SCHED_ARG "defer_sched"
 #define DLB2_QID_DEPTH_THRESH_ARG "qid_depth_thresh"
 #define DLB2_COS_ARG "cos"
 #define DLB2_POLL_INTERVAL_ARG "poll_interval"
@@ -585,7 +584,6 @@ struct dlb2_eventdev {
 	uint16_t num_dir_ports; /* total num of dir ports requested */
 	bool umwait_allowed;
 	bool global_dequeue_wait; /* Not using per dequeue wait if true */
-	bool defer_sched;
 	enum dlb2_cq_poll_modes poll_mode;
 	int poll_interval;
 	int sw_credit_quanta;
@@ -620,7 +618,6 @@ struct dlb2_devargs {
 	int max_num_events;
 	int num_dir_credits_override;
 	int dev_id;
-	int defer_sched;
 	struct dlb2_qid_depth_thresholds qid_depth_thresholds;
 	enum dlb2_cos cos_id;
 	int poll_interval;

       reply	other threads:[~2021-05-21  9:12 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <>
2021-05-21  9:11 ` David Marchand [this message]
2021-05-21  9:11 ` [dpdk-stable] [PATCH v3 2/4] doc: fix runtime options in DLB2 guide David Marchand

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