From: Jianbo Liu <jianbo.liu@linaro.org>
To: dev@dpdk.org, helin.zhang@intel.com,
konstantin.ananyev@intel.com, jerin.jacob@caviumnetworks.com
Cc: Jianbo Liu <jianbo.liu@linaro.org>
Subject: [dpdk-dev] [PATCH v2 2/2] net/ixgbe: calculate correct number of received packets for ARM NEON-version vPMD
Date: Sat, 4 Feb 2017 17:37:04 +0800 [thread overview]
Message-ID: <1486201024-32656-2-git-send-email-jianbo.liu@linaro.org> (raw)
In-Reply-To: <1486201024-32656-1-git-send-email-jianbo.liu@linaro.org>
vPMD will check 4 descs in one time, but the statuses are not consistent
because the memory allocated for RX descriptors is cacheable huagepage.
This patch is to calculate the number of received packets by scann DD bit
sequentially, and stops when meeting the first packet with DD bit unset.
Signed-off-by: Jianbo Liu <jianbo.liu@linaro.org>
---
drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c b/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c
index f96cc85..0b1338d 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx_vec_neon.c
@@ -196,7 +196,6 @@
struct ixgbe_rx_entry *sw_ring;
uint16_t nb_pkts_recd;
int pos;
- uint64_t var;
uint8x16_t shuf_msk = {
0xFF, 0xFF,
0xFF, 0xFF, /* skip 32 bits pkt_type */
@@ -255,6 +254,7 @@
uint64x2_t mbp1, mbp2;
uint8x16_t staterr;
uint16x8_t tmp;
+ uint32_t var = 0;
uint32_t stat;
/* B.1 load 1 mbuf point */
@@ -349,11 +349,19 @@
vst1q_u8((uint8_t *)&rx_pkts[pos]->rx_descriptor_fields1,
pkt_mb1);
+ stat &= IXGBE_VPMD_DESC_DD_MASK;
+
/* C.4 calc avaialbe number of desc */
- var = __builtin_popcount(stat & IXGBE_VPMD_DESC_DD_MASK);
- nb_pkts_recd += var;
- if (likely(var != RTE_IXGBE_DESCS_PER_LOOP))
+ if (likely(var != IXGBE_VPMD_DESC_DD_MASK)) {
+ while (stat & 0x01) {
+ ++var;
+ stat = stat >> 8;
+ }
+ nb_pkts_recd += var;
break;
+ } else {
+ nb_pkts_recd += RTE_IXGBE_DESCS_PER_LOOP;
+ }
}
/* Update our internal tail pointer */
--
1.8.3.1
next prev parent reply other threads:[~2017-02-04 9:37 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-19 6:09 [dpdk-dev] [PATCH 1/2] net/ixgbe: calculate the correct number of received packets in bulk alloc function Jianbo Liu
2016-12-19 6:09 ` [dpdk-dev] [PATCH 2/2] net/ixgbe: calculate correct number of received packets for ARM NEON-version vPMD Jianbo Liu
2016-12-21 10:08 ` Jerin Jacob
2016-12-21 11:03 ` Bruce Richardson
2016-12-22 1:18 ` Jianbo Liu
2016-12-22 1:05 ` Jianbo Liu
2017-02-01 16:19 ` [dpdk-dev] [PATCH 1/2] net/ixgbe: calculate the correct number of received packets in bulk alloc function Ananyev, Konstantin
2017-02-03 6:22 ` Jianbo Liu
2017-02-03 11:38 ` Ananyev, Konstantin
2017-02-04 3:37 ` Jianbo Liu
2017-02-04 9:37 ` [dpdk-dev] [PATCH v2 " Jianbo Liu
2017-02-04 9:37 ` Jianbo Liu [this message]
2017-02-04 13:26 ` Ananyev, Konstantin
2017-02-08 18:02 ` Ferruh Yigit
2017-02-08 18:53 ` Ananyev, Konstantin
2017-02-08 19:53 ` Ananyev, Konstantin
2017-02-09 3:49 ` Jianbo Liu
2017-02-04 16:37 ` [dpdk-dev] [PATCH v3 " Jianbo Liu
2017-02-04 16:37 ` [dpdk-dev] [PATCH v3 2/2] net/ixgbe: calculate correct number of received packets for ARM NEON-version vPMD Jianbo Liu
2017-02-04 16:39 ` [dpdk-dev] [PATCH v3 1/2] net/ixgbe: calculate the correct number of received packets in bulk alloc function Jianbo Liu
2017-02-09 4:05 ` [dpdk-dev] [PATCH v4 " Jianbo Liu
2017-02-09 4:05 ` [dpdk-dev] [PATCH v4 2/2] net/ixgbe: calculate correct number of received packets for ARM NEON-version vPMD Jianbo Liu
2017-02-09 12:43 ` Ferruh Yigit
2017-02-09 12:39 ` [dpdk-dev] [PATCH v4 1/2] net/ixgbe: calculate the correct number of received packets in bulk alloc function Ferruh Yigit
2017-02-09 12:42 ` Ferruh Yigit
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