From: Pavan Nikhilesh Bhagavatula <pbhagavatula@caviumnetworks.com>
To: "Van Haaren, Harry" <harry.van.haaren@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH 1/3] evendev: fix inconsistency in event queue config
Date: Fri, 20 Oct 2017 16:00:33 +0530 [thread overview]
Message-ID: <20171020103032.GA7404@PBHAGAVATULA-LT> (raw)
In-Reply-To: <E923DB57A917B54B9182A2E928D00FA650FC91E3@IRSMSX102.ger.corp.intel.com>
On Fri, Oct 20, 2017 at 09:54:36AM +0000, Van Haaren, Harry wrote:
> > From: Pavan Nikhilesh [mailto:pbhagavatula@caviumnetworks.com]
> > Sent: Thursday, October 12, 2017 2:16 PM
> > To: jerin.jacob@caviumnetworks.com; hemant.agrawal@nxp.com; Van Haaren,
> > Harry <harry.van.haaren@intel.com>
> > Cc: dev@dpdk.org; Pavan Nikhilesh <pbhagavatula@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 <pbhagavatula@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?
>
Hey Harry,
I do understand what you mean, my initial thought was to include "ALL_TYPES" as
a schedule_type in queue config but this would just complicate things.
As these values are only used in config phase we could have a check to see if
event_queue_cfg is not "ALL_TYPES" and only then return the value of sched_type
else return a error value in case of get_attr().
I think most of the places this specific check is handled, one such missed
place would be get_attr(). If we could come to a conclusion to fix it in a
correct way I will send out a v2.
Thanks,
Pavan.
>
> 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>
next prev parent reply other threads:[~2017-10-20 10:30 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-12 13:15 Pavan Nikhilesh
2017-10-12 13:15 ` [dpdk-dev] [PATCH 2/3] eventdev: extend queue attribute get function Pavan Nikhilesh
2017-10-12 13:15 ` [dpdk-dev] [PATCH 3/3] doc: update eventdev programmers guide Pavan Nikhilesh
2017-10-20 9:54 ` [dpdk-dev] [PATCH 1/3] evendev: fix inconsistency in event queue config Van Haaren, Harry
2017-10-20 10:30 ` Pavan Nikhilesh Bhagavatula [this message]
2017-10-20 16:38 ` Van Haaren, Harry
2017-10-20 19:09 ` Pavan Nikhilesh Bhagavatula
2017-10-21 17:27 ` Jerin Jacob
2017-10-23 8:04 ` Van Haaren, Harry
2017-10-23 8:41 ` Pavan Nikhilesh Bhagavatula
2017-10-23 14:45 ` Van Haaren, Harry
2017-10-23 14:54 ` Pavan Nikhilesh Bhagavatula
2017-10-21 15:05 ` Jerin Jacob
2017-10-23 16:29 ` [dpdk-dev] [PATCH v2 " Pavan Nikhilesh
2017-10-23 16:29 ` [dpdk-dev] [PATCH v2 2/3] eventdev: extend queue attribute get function Pavan Nikhilesh
2017-10-23 16:29 ` [dpdk-dev] [PATCH v2 3/3] doc: update eventdev programmers guide Pavan Nikhilesh
2017-10-23 17:40 ` [dpdk-dev] [PATCH v3 1/3] evendev: fix inconsistency in event queue config Pavan Nikhilesh
2017-10-23 17:40 ` [dpdk-dev] [PATCH v3 2/3] eventdev: extend queue attribute get function Pavan Nikhilesh
2017-10-25 13:43 ` Van Haaren, Harry
2017-10-25 13:58 ` Pavan Nikhilesh Bhagavatula
2017-10-23 17:40 ` [dpdk-dev] [PATCH v3 3/3] doc: update eventdev programmers guide Pavan Nikhilesh
2017-10-25 13:43 ` Van Haaren, Harry
2017-10-25 13:42 ` [dpdk-dev] [PATCH v3 1/3] evendev: fix inconsistency in event queue config Van Haaren, Harry
2017-10-25 14:21 ` [dpdk-dev] [PATCH v4 " Pavan Nikhilesh
2017-10-25 14:21 ` [dpdk-dev] [PATCH v4 2/3] eventdev: extend queue attribute get function Pavan Nikhilesh
2017-10-25 14:21 ` [dpdk-dev] [PATCH v4 3/3] doc: update eventdev programmers guide Pavan Nikhilesh
2017-10-26 22:26 ` [dpdk-dev] [PATCH v4 1/3] evendev: fix inconsistency in event queue config Thomas Monjalon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20171020103032.GA7404@PBHAGAVATULA-LT \
--to=pbhagavatula@caviumnetworks.com \
--cc=dev@dpdk.org \
--cc=harry.van.haaren@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).