https://bugs.dpdk.org/show_bug.cgi?id=699
Bug ID: 699
Summary: [dpdk-21.05]
pvp_virtio_user_multi_queues_port_restart: virtio-user
can't recieve packets when use packed ring and ring
size is 255
Product: DPDK
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: vhost/virtio
Assignee: dev@dpdk.org
Reporter: weix.l...@intel.com
Target Milestone: ---
Environment
DPDK version:
21.05-rc2:47a0c2e11712fc5286d6a197d549817ae8f8f50e
Other software versions: N/A
OS: Ubuntu 20.04.1 LTS/Linux 5.11.6-051106-generic
Compiler: gcc version 9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04)
Hardware platform: Intel(R) Xeon(R) Platinum 8280M CPU @ 2.70GHz
NIC hardware: Intel Corporation Ethernet Controller XL710 for 40GbE QSFP+ (rev
01)
NIC driver & firmware: i40e-5.11.6-051106-generic/8.30 0x8000a4ae 1.2926.0
Test Setup
Steps to reproduce
List the steps to reproduce the issue.
#1.Build DPDK
CC=gcc meson -Denable_kmods=True -Dlibdir=lib --default-library=static
x86_64-native-linuxapp-gcc
ninja -C x86_64-native-linuxapp-gcc
#2.Bind NIC port to DPDK
dpdk-devbind.py --force --bind=vfio-pci 0000:af:00.0
#3.Start vhost-user testpmd
x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 30,31,32 -n 4
--file-prefix=vhost_73033_20210508140517 -a 0000:af:00.0 --vdev
'net_vhost0,iface=vhost-net,queues=2,client=0' -- -i --nb-cores=2 --rxq=2
--txq=2 --rss-ip
set fwd mac
start
#4.Start virtio-user testpmd with packed ring path
x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 33,34,35 -n 4
--file-prefix=virtio --no-pci --vdev
net_virtio_user0,mac=00:01:02:03:04:05,path=./vhost-net,queues=2,packed_vq=1,mrg_rxbuf=0,in_order=0,queue_size=255
-- -i --tx-offloads=0x0 --enable-hw-vlan-strip --rss-ip --nb-cores=2 --rxq=2
--txq=2 --txd=255 --rxd=255
set fwd mac
start
#5.Use TREX to send pakcets to DUT port
cd /opt/trex/v2.84/;./t-rex-64 -i --cfg /etc/trex_cfg_fvl40g.yaml -c 16
cd /opt/trex/v2.84/;./trex-console
start -f stl/bench.py -t size=64,vm=cached --port 0 -m 100%
#6.Execute command to get throught from vhost-user testpmd
testpmd> show port stats all
Show the output from the previous commands.
testpmd> show port stats all
######################## NIC statistics for port 0 ########################
RX-packets: 1399768133 RX-missed: 273026869 RX-bytes: 89948812572
RX-errors: 0
RX-nombuf: 0
TX-packets: 1175 TX-errors: 0 TX-bytes: 70500 Throughput
(since last show)
Rx-pps: 39303277 Rx-bps: 18865575800
Tx-pps: 0 Tx-bps: 0
############################################################################
######################## NIC statistics for port 1 ########################
RX-packets: 1175 RX-missed: 0 RX-bytes: 70500
RX-errors: 0
RX-nombuf: 0
TX-packets: 2292 TX-errors: 0 TX-bytes: 137520 Throughput
(since last show)
Rx-pps: 0 Rx-bps: 0
Tx-pps: 0 Tx-bps: 0
############################################################################
Expected Result
Explain what is the expected result in text or as an example output:
testpmd> show port stats all
######################## NIC statistics for port 0 ########################
RX-packets: 26942470 RX-missed: 98913124 RX-bytes: 5625465796
RX-errors: 0
RX-nombuf: 0
TX-packets: 26941001 TX-errors: 0 TX-bytes: 1616459356
Throughput (since last show)
Rx-pps: 9136506 Rx-bps: 15263702536
Tx-pps: 9136475 Tx-bps: 4385501336
############################################################################
######################## NIC statistics for port 1 ########################
RX-packets: 26941662 RX-missed: 0 RX-bytes: 1616499720
RX-errors: 0
RX-nombuf: 0
TX-packets: 26941792 TX-errors: 0 TX-bytes: 1616507520
Throughput (since last show)
Rx-pps: 9136255 Rx-bps: 4385402816
Tx-pps: 9136295 Tx-bps: 4385421736
############################################################################
Regression
Is this issue a regression: (Y/N) Y
Version the regression was introduced: Specify git id if known.
commit d18db8049c7c52fe91058c125c7a59c8c2f9cb42 (HEAD)
Author: Balazs Nemeth <bnem...@redhat.com>
Date: Wed Apr 28 10:17:31 2021 +0800
vhost: read last used index once
Instead of calculating the address of a packed descriptor based on the
vq->desc_packed and vq->last_used_idx every time, store that base
address in desc_base. On arm, this saves 176 bytes in code size of
function in which vhost_flush_enqueue_batch_packed gets inlined.
Signed-off-by: Balazs Nemeth <bnem...@redhat.com>
Reviewed-by: Maxime Coquelin <maxime.coque...@redhat.com>
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