From: bugzilla@dpdk.org
To: dev@dpdk.org
Subject: [dpdk-dev] [Bug 771] [dpdk-21.08]loopback csum fwd performance drop when fwd 8k large pkts
Date: Wed, 04 Aug 2021 06:57:49 +0000 [thread overview]
Message-ID: <bug-771-3@http.bugs.dpdk.org/> (raw)
https://bugs.dpdk.org/show_bug.cgi?id=771
Bug ID: 771
Summary: [dpdk-21.08]loopback csum fwd performance drop when
fwd 8k large pkts
Product: DPDK
Version: 21.08
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: vhost/virtio
Assignee: dev@dpdk.org
Reporter: weix.ling@intel.com
Target Milestone: ---
Reproduce step:
1.Launch vhost:
./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 32-33 -n 4 --no-pci --vdev
'eth_vhost0,iface=vhost-net0,queues=1,client=1' -- -i --nb-cores=1
set fwd csum
start
2. Launch virtio:
x86_64-native-linuxapp-gcc/app/dpdk-testpmd -l 30,31 -n 4
--file-prefix=testpmd0 --no-pci
--vdev=net_virtio_user0,mac=00:11:22:33:44:10,path=./vhost-net0,queues=1,mrg_rxbuf=1,in_order=0,vectorized=1,packed_vq=1,server=1
-- -i
set fwd csum
set txpkts 2000,2000,2000,2000
start tx_first 32
show port stats all
Performance result:
commit 8f09758941bc93f80525b2b56f85dcf1bd6bd295
expected performance: 2140859pps (w/o your patch set)
commit 9af79db20f4cf75 testpmd loopback performance
perf drop to : 727921 pps (w/ your patch set)
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