Docs update

chenjiandongx · Dec 4, 2021 · c67dc06 · c67dc06
1 parent 60a790d
commit c67dc06
Showing 1 changed file with 36 additions and 4 deletions.
diff --git a/README.md b/README.md
@@ -28,17 28,17 @@ On macOS, the [lsof](https://ss64.com/osx/lsof.html) command is invoked, which r
 
 **Debian/Ubuntu**
 ```shell
-sudo apt-get install libpcap-dev
 $ sudo apt-get install libpcap-dev
 ```
 
 **CentOS/Fedora**
 ```shell
-sudo yum install libpcap libpcap-devel
 $ sudo yum install libpcap libpcap-devel
 ```
 
 **MacOS**
 ```shell
-brew install libpcap
 $ brew install libpcap
 ```
 
 **Windows**
@@ -48,7 48,7 @@ Windows need to have [npcap](https://nmap.org/npcap/) installed for capturing pa
 After that, install sniffer by `go get` command.
 
 ```shell
-go get -u github.com/chenjiandongx/sniffer
 $ go get -u github.com/chenjiandongx/sniffer
 ```
 
 ## Usages
@@ -90,6 90,38 @@ Flags:
 | <kbd>s</kbd> | switch next view mode |
 | <kbd>q</kbd> / <kbd>Ctrl</kbd> <kbd>C</kbd> | quit |
 
 ## Performance
 
 [iperf](https://github.com/esnet/iperf) is a tool for active measurements of the maximum achievable bandwidth on IP networks. Next we use this tool to forge massive packets on the `lo` device.
 
 ```shell
 $ iperf -s -p 5001
 $ iperf -c localhost --parallel 40 -i 1 -t 2000
 ```
 
 ***sniffer vs bandwhich vs nethogs***
 
 As you can see, CPU overheads `bandwhich > sniffer > nethogs`, memory overheads `sniffer > nethogs > bandwhich`.
 ```shell
  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME COMMAND
  128405 root 20 0 210168 5184 3596 S 31.0 0.3 1:21.69 bandwhich
  128596 root 20 0 1449872 21912 8512 S 20.7 1.1 0:28.54 sniffer
  128415 root 20 0 18936 7464 6900 S 5.7 0.4 0:11.56 nethogs
 ```
 
 See what stats they show, sniffer and bandwhich output are very approximate(~ 2.5GB/s). netlogs can only handles packets 1.122GB/s. May this be the reason for its low CPU consumption?
 
 ```shell
 # sniffer
 Total </ Connections: 80 Up: 2.5GBps Down: 0.0GBps />
 
 # bandwhich
 Total Up / Down: 2.5GiBps / 964Bps
 
 # nethogs
 TOTAL 1.122 0.000 GB/sec
 ```
 
 ## View Mode
 
 ***Bytes Mode:*** display traffic stats in bytes by the Table widget.