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From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Gavin Hu <gavin.hu@arm.com>, dev@dpdk.org
Cc: nd@arm.com, david.marchand@redhat.com, thomas@monjalon.net,
	jerinj@marvell.com, xiaolong.ye@intel.com,
	Honnappa.Nagarahalli@arm.com, ruifeng.wang@arm.com,
	phil.yang@arm.com, joyce.kong@arm.com, steve.capper@arm.com,
	Raslan Darawsheh <rasland@mellanox.com>
Subject: Re: [dpdk-dev] [PATCH v2 2/2] net/i40e: restrict pointer aliasing for NEON vPMD
Date: Mon, 20 Apr 2020 15:51:08 +0100
Message-ID: <4c9c92c7-8551-eb58-7708-a7caf8332f4a@intel.com> (raw)
In-Reply-To: <20200413155640.53581-3-gavin.hu@arm.com>

On 4/13/2020 4:56 PM, Gavin Hu wrote:
> restrict pointer aliasing to optimize the code generated.
> 
> The patch showed ~3% performnace uplift on Arm N1SDP platform, and no
> degradation on ThunderX2. The tet case is RFC2544 zero-loss L2
> forwarding running testpmd.
> 
> [1] https://gcc.gnu.org/onlinedocs/gcc-4.8.5/gcc/Restricted-Pointers.html
> 
> Signed-off-by: Gavin Hu <gavin.hu@arm.com>
> Reviewed-by: Steve Capper <steve.capper@arm.com>

Hi Gavin,

Raslan supported following build error [1], this is blocking the next-net, can
you please check the error, and send a fix for it?

[1]
/download/dpdk/drivers/net/i40e/i40e_rxtx_vec_neon.c:175:65: error: expected
';', ',' or ')' before 'rx_pkts'
desc_to_ptype_v(uint64x2_t descs[4], struct rte_mbuf **restrict rx_pkts,
^
/download/dpdk/drivers/net/i40e/i40e_rxtx_vec_neon.c:197:51: error: expected
';', ',' or ')' before 'rxq'
_recv_raw_pkts_vec(struct i40e_rx_queue *restrict rxq, struct rte_mbuf
^
/download/dpdk/drivers/net/i40e/i40e_rxtx_vec_neon.c:435:35: error: expected
';', ',' or ')' before 'rx_queue'
i40e_recv_pkts_vec(void *restrict rx_queue, struct rte_mbuf **restrict rx_pkts,
^
/download/dpdk/drivers/net/i40e/i40e_rxtx_vec_neon.c: In function
'i40e_recv_scattered_pkts_vec':
/download/dpdk/drivers/net/i40e/i40e_rxtx_vec_neon.c:456:2: error: implicit
declaration of function '_recv_raw_pkts_vec' [-Werror=implicit-function-declaration]
uint16_t nb_bufs = _recv_raw_pkts_vec(rxq, rx_pkts, nb_pkts,
^
/download/dpdk/drivers/net/i40e/i40e_rxtx_vec_neon.c:456:2: error: nested extern
declaration of '_recv_raw_pkts_vec' [-Werror=nested-externs]
/download/dpdk/drivers/net/i40e/i40e_rxtx_vec_neon.c: At top level:
/download/dpdk/drivers/net/i40e/i40e_rxtx_vec_neon.c:507:42: error: expected
';', ',' or ')' before 'tx_queue'
i40e_xmit_fixed_burst_vec(void *restrict tx_queue,


gcc version 4.8.5 20150623 (Red Hat 4.8.5-28) (GCC)
seen this with T=arm64-bluefield-linuxapp-gcc and T=arm64-armv8a-linux-gcc
using make


  reply	other threads:[~2020-04-20 14:51 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-06  5:04 [dpdk-dev] [PATCH v1 0/3] i40e vPMD optimization on aarch64 Gavin Hu
2020-03-06  5:04 ` [dpdk-dev] [PATCH v1 1/3] net/i40e: relax barrier in the Tx fastpath of vPMD Gavin Hu
2020-03-06  9:11   ` Jerin Jacob
2020-03-06  5:04 ` [dpdk-dev] [PATCH v1 2/3] net/i40e: restrict pointer aliasing for neon vec Gavin Hu
2020-03-06  5:04 ` [dpdk-dev] [PATCH v1 3/3] net/i40e: auto-vectorization to speed up Tx free Gavin Hu
2020-03-06  7:44   ` Jerin Jacob
2020-03-06  9:06     ` Thomas Monjalon
2020-03-07 15:03     ` Gavin Hu
2020-03-09  7:35       ` Jerin Jacob
2020-03-09  9:23         ` Gavin Hu
2020-04-13 15:56 ` [dpdk-dev] [PATCH v2 0/2] i40e NEON vPMD optimization on aarch64 Gavin Hu
2020-04-13 15:56 ` [dpdk-dev] [PATCH v2 1/2] net/i40e: relax barrier in Tx fastpath for NEON vPMD Gavin Hu
2020-04-13 15:56 ` [dpdk-dev] [PATCH v2 2/2] net/i40e: restrict pointer aliasing " Gavin Hu
2020-04-20 14:51   ` Ferruh Yigit [this message]
2020-04-21  9:51     ` Gavin Hu
2020-04-13 16:40 ` [dpdk-dev] [PATCH v3 0/2] i40e NEON vPMD optimization on aarch64 Gavin Hu
2020-04-15  6:50   ` Ye Xiaolong
2020-04-13 16:40 ` [dpdk-dev] [PATCH v3 1/2] net/i40e: relax barrier in Tx fastpath for NEON vPMD Gavin Hu
2020-04-13 16:40 ` [dpdk-dev] [PATCH v3 2/2] net/i40e: restrict pointer aliasing " Gavin Hu

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