Hi Ceara, > -----Original Message----- > From: Take Ceara [mailto:dumitru.ceara at gmail.com] > Sent: Tuesday, July 19, 2016 10:59 PM > To: Xing, Beilei <beilei.xing at intel.com> > Cc: Zhang, Helin <helin.zhang at intel.com>; Wu, Jingjing > <jingjing.wu at intel.com>; dev at dpdk.org > Subject: Re: [dpdk-dev] [dpdk-users] RSS Hash not working for XL710/X710 > NICs for some RX mbuf sizes > > Hi Beilei, > > I changed the way I run testmpd to: > > testpmd -c 0x331 -w 0000:82:00.0 -w 0000:83:00.0 -- --mbuf-size 1152 --rss-ip > - > -rxq=2 --txpkts 1024 -i > > As far as I understand this will allocate mbufs with the same size I was using > in my test (--mbuf-size seems to include the mbuf headroom therefore 1152 > = 1024 + 128 headroom). > > testpmd> start tx_first > io packet forwarding - CRC stripping disabled - packets/burst=32 > nb forwarding cores=1 - nb forwarding ports=2 > RX queues=2 - RX desc=128 - RX free threshold=32 > RX threshold registers: pthresh=8 hthresh=8 wthresh=0 > TX queues=1 - TX desc=512 - TX free threshold=32 > TX threshold registers: pthresh=32 hthresh=0 wthresh=0 > TX RS bit threshold=32 - TXQ flags=0xf01 > testpmd> show port stats all > > ######################## NIC statistics for port 0 > ######################## > RX-packets: 18817613 RX-missed: 5 RX-bytes: 19269115888 > RX-errors: 0 > RX-nombuf: 0 > TX-packets: 18818064 TX-errors: 0 TX-bytes: 19269567464 > > ########################################################## > ################## > > ######################## NIC statistics for port 1 > ######################## > RX-packets: 18818392 RX-missed: 5 RX-bytes: 19269903360 > RX-errors: 0 > RX-nombuf: 0 > TX-packets: 18817979 TX-errors: 0 TX-bytes: 19269479424 > > ########################################################## > ################## > > Ttraffic is sent/received. However, I couldn't find any way to verify that the > incoming mbufs actually have the mbuf->hash.rss field set except for starting > test-pmd with gdb and setting a breakpoint in the io fwd engine. After doing > that I noticed that none of the incoming packets has the PKT_RX_RSS_HASH > flag set in ol_flags... I guess for some reason test-pmd doesn't actually > configure RSS in this case but I fail to see where. >
Actually there's a way to check mbuf->hash.rss, you need set forward mode to "rxonly", and set verbose to 1. I run testpmd with the configuration you used, and found i40e RSS works well. With the following steps, you can see RSS hash value and receive queue, and PKT_RX_RSS_HASH is set too. I think you can use the same way to check what you want. ./testpmd -c fffff -n 4 -- -i --coremask=0xffffe --rxq=16 --txq=16 --mbuf-size 1152 --rss-ip --txpkts 1024 testpmd> set verbose 1 testpmd> set fwd rxonly testpmd> start testpmd> port 0/queue 1: received 1 packets src=00:00:01:00:0F:00 - dst=68:05:CA:32:03:4C - type=0x0800 - length=1020 - nb - Receive queue=0x1 PKT_RX_RSS_HASH port 0/queue 0: received 1 packets src=00:00:01:00:0F:00 - dst=68:05:CA:32:03:4C - type=0x0800 - length=1020 - nb_segs=1 - RSS hash=0x4e949f23 - RSS queue=0x0Unknown packet type - Receive queue=0x0 PKT_RX_RSS_HASH port 0/queue 8: received 1 packets src=00:00:01:00:0F:00 - dst=68:05:CA:32:03:4C - type=0x0800 - length=1020 - nb_segs=1 - RSS hash=0xa3c78b2b - RSS queue=0x8Unknown packet type - Receive queue=0x8 PKT_RX_RSS_HASH port 0/queue 5: received 1 packets src=00:00:01:00:0F:00 - dst=68:05:CA:32:03:4C - type=0x0800 - length=1020 - nb_segs=1 - RSS hash=0xe29b3d36 - RSS queue=0x5Unknown packet type - Receive queue=0x5 PKT_RX_RSS_HASH /Beilei > Thanks, > Dumitru >
