[dpdk-dev] 回复: [PATCH v1 3/4] net/ixgbe: implement good checksum flag for NEON vector

[Feifei Wang]

Hi, Haiyue

> -----邮件原件-----
> 发件人: Wang, Haiyue <haiyue.wang at intel.com>
> 发送时间: 2020年11月18日 15:22
> 收件人: Feifei Wang <Feifei.Wang2 at arm.com>; jerinj at marvell.com; Ruifeng
> Wang <Ruifeng.Wang at arm.com>; Guo, Jia <jia.guo at intel.com>
> 抄送: dev at dpdk.org; nd <nd at arm.com>
> 主题: RE: [PATCH v1 3/4] net/ixgbe: implement good checksum flag for NEON
> vector
> 
> > -----Original Message-----
> > From: Feifei Wang <feifei.wang2 at arm.com>
> > Sent: Wednesday, November 18, 2020 14:29
> > To: Jerin Jacob <jerinj at marvell.com>; Ruifeng Wang
> > <ruifeng.wang at arm.com>; Guo, Jia <jia.guo at intel.com>; Wang, Haiyue
> > <haiyue.wang at intel.com>
> > Cc: dev at dpdk.org; nd at arm.com; feiwan02 <feifei.wang2 at arm.com>
> > Subject: [PATCH v1 3/4] net/ixgbe: implement good checksum flag for
> > NEON vector
> >
> > From: feiwan02 <feifei.wang2 at arm.com>
> >
> > Add CKSUM_GOOD flag to distinguish a good checksum from an unknown
> one
> > in neon vertor RX function.
> >
> > Test Results:
> > NICs: 82599(igb)
> > Dirver: ixgbe(vector)
> > Packet: IPv4_checksum = correct value && UDP_checksum = correct value
> >
> > $:./app/dpdk-testpmd -c 0x3 -w 0002:f9:00.0 -- -i
> > --port-topology=chained
> > test-pmd> set fwd rxonly
> > test-pmd> set verbose 1
> > test-pmd> start
> >
> > With this patch:
> > testpmd> port 0/queue 0: received 1 packets
> > src=00:00:00:00:00:02 - dst=00:00:00:00:00:01 - type=0x0800 -
> > length=70 - nb_segs=1
> > ol_flags: PKT_RX_L4_CKSUM_GOOD PKT_RX_IP_CKSUM_GOOD
> >
> > Without this patch:
> > testpmd> port 0/queue 0: received 1 packets
> > src=00:00:00:00:00:02 - dst=00:00:00:00:00:01 - type=0x0800 -
> > length=70 - nb_segs=1
> > ol_flags: PKT_RX_L4_CKSUM_UNKNOWN PKT_RX_IP_CKSUM_UNKNOWN
> >
> 
> How about to merge "1 & 2" and "3 & 4"? Then you will have the above test
> result. ;-)
Do you mean that combine patch 1 and patch 2 into one patch to support vlan stripping and bad checksum flag, 
Then also do the same work for patch 3 and patch 4 to support good checksum flag and enable IXGBE neon vector when DEV_RX_OFFLOAD_CHECKSUM is set?

Actually, the test results are achieved without patch 4, due to that testpmd does not check rxmode->offloads, it will call IXGBE NEON vector function directly. And this change
is for the default config of l3fwd example.

Best Regards
Feifei
> 
> > Signed-off-by: Feifei Wang <feifei.wang2 at arm.com>
> > Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>
> > ---
> > 2.17.1