From: Nikhil Rao <nikhil.rao@intel.com>
To: jerin.jacob@caviumnetworks.com
Cc: dev@dpdk.org, Nikhil Rao <nikhil.rao@intel.com>, stable@dpdk.org
Subject: [dpdk-dev] [PATCH] eventdev: add event buffer flush in Rx adapter
Date: Sun, 3 Jun 2018 18:12:25 +0530 [thread overview]
Message-ID: <1528029745-69148-1-git-send-email-nikhil.rao@intel.com> (raw)
Add an event buffer flush when the current invocation
of the Rx adapter is completed.
This patch provides lower latency in case there is a
BATCH_SIZE of events in the event buffer.
Suggested-by: Narender Vangati <narender.vangati@intel.com>
Signed-off-by: Nikhil Rao <nikhil.rao@intel.com>
Cc: stable@dpdk.org
---
lib/librte_eventdev/rte_event_eth_rx_adapter.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/lib/librte_eventdev/rte_event_eth_rx_adapter.c b/lib/librte_eventdev/rte_event_eth_rx_adapter.c
index 53a3788..3a70058 100644
--- a/lib/librte_eventdev/rte_event_eth_rx_adapter.c
+++ b/lib/librte_eventdev/rte_event_eth_rx_adapter.c
@@ -490,7 +490,7 @@ static uint16_t gcd_u16(uint16_t a, uint16_t b)
* the hypervisor's switching layer where adjustments can be made to deal with
* it.
*/
-static inline uint32_t
+static inline void
eth_rx_poll(struct rte_event_eth_rx_adapter *rx_adapter)
{
uint32_t num_queue;
@@ -519,7 +519,7 @@ static uint16_t gcd_u16(uint16_t a, uint16_t b)
flush_event_buffer(rx_adapter);
if (BATCH_SIZE > (ETH_EVENT_BUFFER_SIZE - buf->count)) {
rx_adapter->wrr_pos = wrr_pos;
- break;
+ return;
}
stats->rx_poll_count++;
@@ -535,7 +535,7 @@ static uint16_t gcd_u16(uint16_t a, uint16_t b)
if (nb_rx > max_nb_rx) {
rx_adapter->wrr_pos =
(wrr_pos + 1) % rx_adapter->wrr_len;
- return nb_rx;
+ break;
}
}
@@ -543,20 +543,18 @@ static uint16_t gcd_u16(uint16_t a, uint16_t b)
wrr_pos = 0;
}
- return nb_rx;
+ if (buf->count >= BATCH_SIZE)
+ flush_event_buffer(rx_adapter);
}
static int
event_eth_rx_adapter_service_func(void *args)
{
struct rte_event_eth_rx_adapter *rx_adapter = args;
- struct rte_eth_event_enqueue_buffer *buf;
- buf = &rx_adapter->event_enqueue_buffer;
if (rte_spinlock_trylock(&rx_adapter->rx_lock) == 0)
return 0;
- if (eth_rx_poll(rx_adapter) == 0 && buf->count)
- flush_event_buffer(rx_adapter);
+ eth_rx_poll(rx_adapter);
rte_spinlock_unlock(&rx_adapter->rx_lock);
return 0;
}
--
1.8.3.1
next reply other threads:[~2018-06-03 12:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-03 12:42 Nikhil Rao [this message]
2018-06-11 12:16 ` Jerin Jacob
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=1528029745-69148-1-git-send-email-nikhil.rao@intel.com \
--to=nikhil.rao@intel.com \
--cc=dev@dpdk.org \
--cc=jerin.jacob@caviumnetworks.com \
--cc=stable@dpdk.org \
/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).