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发包工具 TRex stateless 使用笔记

https://github.com/cisco-system-traffic-generator/trex-core

Linux 运行优化

for file in `find /sys/devices/system/cpu/ -name scaling_governor`; do echo performance > $file; done

echo never > /sys/kernel/mm/transparent_hugepage/defrag

echo never > /sys/kernel/mm/transparent_hugepage/enabled

echo 0 > /sys/kernel/mm/transparent_hugepage/khugepaged/defrag

sysctl -w vm.swappiness=0

sysctl -w vm.zone_reclaim_mode=0

systemctl stop irqbalance

trex 初始化

trex 需安装Python2/3, 如使用busybox等自定义文件系统需配置python路径:

export PATH=/sdd/python-2.7.15/bin:$PATH

cd /sdd/trex-v2.53

发包示例:

./t-rex-64 –cfg mlx5-02.yaml -m 10 -d 60 -f cap2/imix_64_fast.yaml

./t-rex-64 –cfg mlx5-02.yaml -m 10 -d 60 -f ipv6.yaml –ipv6 –no-ofed-check

配置单口发包, 修改mlx5-02.yaml interfaces :

### Config file generated by dpdk_setup_ports.py ###

– version: 2

interfaces: [’07:00.0′, “dummy”]

port_info:

– dest_mac: e8:68:19:c7:94:f2

src_mac: 50:6b:4b:d3:cf:74

platform:

master_thread_id: 0

latency_thread_id: 8

dual_if:

– socket: 0

threads: [1,2,3,4,5,6,7,9,10,11,12,13,14,15]

tw:

buckets: 1024

levels: 3

bucket_time_usec: 20.0

配置双口发包, 添加接口bus-info到配置文件:

### Config file generated by dpdk_setup_ports.py ###

– version: 2

interfaces: [’07:00.0′, ’07:00.1′]

port_info:

– dest_mac: e8:68:19:c7:94:f2

src_mac: 50:6b:4b:d3:cf:74

– dest_mac: e8:68:19:c7:94:f2

src_mac: 50:6b:4b:d3:cf:75

注:

Mellanox CX-5 网卡Trex 2.53默认只能在CentOS7.4系统运行. 可通过修改 dpdk_setup_ports.py 屏蔽相关的检查代码即可.

trex startup

启动TRex服务端进入 stateless 模式, 可配置-c指定CPU.

./t-rex-64 –cfg mlx5-02.yaml –ipv6 –no-ofed-check -i

启动TRex客户端

./trex-console -s 127.0.0.1

help(帮助命令，显示所支持的命令，如：发包命令start，停止发包stop，图形化显示命令tui)

cmd -h (对于每条命令，加上-h或—help可以显示具体的帮助信息)

start

启动TX任务

trex>start -h

usage: start [-h] [-p PORTS [PORTS …] | -a] [–total] [–force] -f FILE

[-d TIME] [-t T1=VAL[,T2=VAL …]] [-m MULT] [-n]

[–pin | –core_mask CORE_MASK [CORE_MASK …]] [–sync]

Start selected traffic on specified ports on TRex

optional arguments:

-h, –help show this help message and exit

-p PORTS [PORTS …], –port PORTS [PORTS …]

A list of ports on which to apply the command

-a Set this flag to apply the command on all available

ports

–total traffic will be divided between all ports specified

–force Set if you want to stop active ports before appyling

command.

-f FILE File path to use

-d TIME Set duration time for job.

-t T1=VAL[,T2=VAL …]

Sets tunables for a profile. Example: ‘-t

fsize=100,pg_id=7′

-m MULT, –multiplier MULT

Multiplier should be passed in the following format:

[number][| bps | kbps | mbps | gbps | pps |

kpps | mpps | % ]. no suffix will provide an absoulute

factor and percentage will provide a percentage of the

line rate. examples ‘-m 10’, ‘-m 10kbps’, ‘-m

10kbpsl1′, ‘-m 10mpps’, ‘-m 23% ‘ ‘-m 23%’ : is 23% L1

bandwidth ‘-m 23mbps’: is 23mbps in L2 bandwidth

(including FCS+4) ‘-m 23mbpsl1’: is 23mbps in L1

bandwidth

-n, –dry Dry run – no traffic will be injected

–pin Pin cores to interfaces – cores will be divided

between interfaces (performance boot for symetric

profiles)

–core_mask CORE_MASK [CORE_MASK …]

Core mask – only cores responding to the bit mask will

be active

–sync Run the traffic with syncronized time at adjacent

ports. Need to ensure effective ipg is at least 1000

usec.

示例:

start -f stl/bench.py -t size=64,vm=cached —p 0 -m 100%

IPv6 SYN-FLOOD

start -m 100% -p 0 –force -f stl/syn_attack.py

IPv6 UDP

start -m 100% -p 0 –force -f stl/imix_ipv6.py

IPv6 SYN-FLOOD

start -m 100% -p 0 –force -f stl/syn_ipv6.py

stop

停止TX任务

stop -a

tui 查看实时动态统计

实时全局统计 & 端口统计

tui

quit

stats 查看当前统计

trex>stats -h

usage: stats [-h] [–port PORTS [PORTS …] | -a]

[-g | -p | –ps | -s | -l | –lh | -c | -m | -x | –xz]

Show various statistics

optional arguments:

-h, –help show this help message and exit

–port PORTS [PORTS …]

A list of ports on which to apply the command

-a Set this flag to apply the command on all available

ports

-g Fetch only global statistics

-p Fetch only port statistics

–ps Fetch only port status data

-s Fetch only streams stats

-l Fetch only latency stats

–lh Fetch only latency histogram

-c Fetch only CPU utilization stats

-m Fetch only MBUF utilization stats

-x Fetch xstats of port, excluding lines with zero values

–xz, –zx Fetch xstats of port, including lines with zero values

示例

获取端口统计

stats –ps

获取端口状态

stats -p

获取全局统计

stats -g

参考

TRex upcoming Stateful scalable TCP support

TRex Stateless GUI v3.2

How TRex is used by Mellanox

Trex Blog

Trex

Comparing TRex Advanced Stateful performance to Linux NGINX

TRex Community

TRex Stateless support

TRex Stateless Python API

Mellanox support