> From: Pavan Nikhilesh [mailto:pbhagavat...@caviumnetworks.com]
> Sent: Thursday, October 12, 2017 2:16 PM
> To: jerin.ja...@caviumnetworks.com; hemant.agra...@nxp.com; Van Haaren,
> Harry <harry.van.haa...@intel.com>
> Cc: dev@dpdk.org; Pavan Nikhilesh <pbhagavat...@caviumnetworks.com>
> Subject: [dpdk-dev] [PATCH 1/3] evendev: fix inconsistency in event queue
> config
>
> With the current scheme of event queue configuration the cfg schedule
> type macros (RTE_EVENT_QUEUE_CFG_*_ONLY) are inconsistent with the
> event schedule type (RTE_SCHED_TYPE_*) this requires unnecessary
> conversion between the fastpath and slowpath API's while scheduling
> events or configuring event queues.
>
> This patch aims to fix such inconsistency by using event schedule
> types (RTE_SCHED_TYPE_*) for event queue configuration.
True - worth cleaning up.
> This patch also fixes example/eventdev_pipeline_sw_pmd as it doesn't
> convert RTE_EVENT_QUEUE_CFG_*_ONLY to RTE_SCHED_TYPE_* which leads to
> improper events being enqueued to the eventdev.
>
> Fixes: adb5d5486c39 ("examples/eventdev_pipeline_sw_pmd: add sample app")
>
> Signed-off-by: Pavan Nikhilesh <pbhagavat...@caviumnetworks.com>
>
>
> app/test-eventdev/evt_common.h | 21 -------------
> app/test-eventdev/test_order_queue.c | 4 +--
> app/test-eventdev/test_perf_queue.c | 4 +--
> drivers/event/dpaa2/dpaa2_eventdev.c | 4 +--
> drivers/event/sw/sw_evdev.c | 28 +++++------------
> examples/eventdev_pipeline_sw_pmd/main.c | 18 +++++------
> lib/librte_eventdev/rte_eventdev.c | 20 +++++-------
> lib/librte_eventdev/rte_eventdev.h | 54 ++++++++++-------------------
> ---
> test/test/test_eventdev.c | 12 +++----
> test/test/test_eventdev_sw.c | 16 +++++-----
> 10 files changed, 60 insertions(+), 121 deletions(-)
>
> diff --git a/app/test-eventdev/evt_common.h b/app/test-eventdev/evt_common.h
> index 4102076..ee896a2 100644
> --- a/app/test-eventdev/evt_common.h
> +++ b/app/test-eventdev/evt_common.h
> @@ -92,25 +92,4 @@ evt_has_all_types_queue(uint8_t dev_id)
> true : false;
> }
>
> -static inline uint32_t
> -evt_sched_type2queue_cfg(uint8_t sched_type)
> -{
> - uint32_t ret;
> -
> - switch (sched_type) {
> - case RTE_SCHED_TYPE_ATOMIC:
> - ret = RTE_EVENT_QUEUE_CFG_ATOMIC_ONLY;
> - break;
> - case RTE_SCHED_TYPE_ORDERED:
> - ret = RTE_EVENT_QUEUE_CFG_ORDERED_ONLY;
> - break;
> - case RTE_SCHED_TYPE_PARALLEL:
> - ret = RTE_EVENT_QUEUE_CFG_PARALLEL_ONLY;
> - break;
> - default:
> - rte_panic("Invalid sched_type %d\n", sched_type);
> - }
> - return ret;
> -}
We should note here, that SCHED_TYPE are integer values:
#define RTE_SCHED_TYPE_ORDERED 0
#define RTE_SCHED_TYPE_ATOMIC 1
#define RTE_SCHED_TYPE_PARALLEL 2
While the EVENT_QUEUE_CFG_ types were bitmasks (before being removed in this
patch)
#define RTE_EVENT_QUEUE_CFG_ATOMIC_ONLY (1ULL << 0)
#define RTE_EVENT_QUEUE_CFG_ORDERED_ONLY (2ULL << 0)
#define RTE_EVENT_QUEUE_CFG_PARALLEL_ONLY (3ULL << 0)
#define RTE_EVENT_QUEUE_CFG_SINGLE_LINK (1ULL << 2)
I'm not against this change - but we must be careful that if there was any
bit-masking being used previously,
that that will subtly have broken if we change to sched types. I'm reviewing
with that in mind..
The RTE_EVENT_QUEUE_CFG_ALL_TYPES config flag now means that all SCHED_TYPEs
are valid. Previously this was contained in the bitmask.. this may lead to
issues.
See patch 2/3, where *only* the schedule_type is read, and returned. What if it
the "ALL_TYPES" flag is
set on the queue? It will be reported wrongly. Currently there is no integer
value for "ALL_TYPES",
so we cannot represent "ALL TYPES" in the return value from get_attr().
Am I explaining my reasoning clearly enough?
The patch correctly leaves QUEUE_CFG_SINGLE_LINK as a bitmask, so that bit is
ok.
> #endif /* _EVT_COMMON_*/
> diff --git a/app/test-eventdev/test_order_queue.c b/app/test-
> eventdev/test_order_queue.c
> index beadd9c..1fa4082 100644
<snip> Remaining diff was updating the QUEUE_CFG to SCHED_TYPE </snip>
