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* [http://www.linuxprogrammingblog.com/io-profiling IO profiling] at Linux programming blog
* [http://www.linuxprogrammingblog.com/io-profiling IO profiling] at Linux programming blog
* [https://www.linux.com/learn/tutorials/470979-who-and-what-is-on-my-network-probing-your-network-with-linux Tīkla analīze]
* [https://www.linux.com/learn/tutorials/470979-who-and-what-is-on-my-network-probing-your-network-with-linux Tīkla analīze]
** Tīkla caurplūdes testi
$ mtr -rw -c 100 <server_ip>

$ yes | pv | ssh user@example.com "cat > /dev/null"
97,3MiB 0:01:36 [1,28MiB/s][ <=> ]

$ iperf3 -s # startē serveri vienā galā
Server listening on 5201
$ iperf3 -c <server_ip> # startē klientu otrā galā
Connecting to host <server_ip>, port 5201
[ 5] local 192.168.1.123 port 51846 connected to <server_ip> port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 1.42 MBytes 11.9 Mbits/sec 0 89.1 KBytes
[ 5] 1.00-2.00 sec 1.62 MBytes 13.6 Mbits/sec 0 147 KBytes
...
[ 5] 9.00-10.00 sec 2.30 MBytes 19.3 Mbits/sec 0 595 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 14.2 MBytes 11.9 Mbits/sec 0 sender
[ 5] 0.00-10.42 sec 11.6 MBytes 9.36 Mbits/sec receiver

$ nstat -az | grep -Ei "drop|overflow|retrans"
TcpExtListenDrops 1 0.0
TcpExtTCPLostRetransmit 11837 0.0
...



* "bashtop" rīks veiktspējas analīzei
* "bashtop" rīks veiktspējas analīzei


Revision as of 08:07, 6 May 2026

Programmētāja resursi

Programmēšanas analīzes rīki

  • PMD - scans source code and looks for bugs, dead code, suboptimal code, overcomplicated expressions, duplicate code.

Linux veiktspējas analīze

$ mtr -rw -c 100  <server_ip>
     

$ yes | pv | ssh user@example.com "cat > /dev/null"
     97,3MiB 0:01:36 [1,28MiB/s][      <=> ]

$ iperf3 -s    # startē serveri vienā galā
     Server listening on 5201
$ iperf3 -c <server_ip>    # startē klientu otrā galā
     Connecting to host <server_ip>, port 5201
     [  5] local 192.168.1.123 port 51846 connected to <server_ip> port 5201
     [ ID] Interval           Transfer     Bitrate         Retr  Cwnd
     [  5]   0.00-1.00   sec  1.42 MBytes  11.9 Mbits/sec    0   89.1 KBytes       
     [  5]   1.00-2.00   sec  1.62 MBytes  13.6 Mbits/sec    0    147 KBytes       
     ...
     [  5]   9.00-10.00  sec  2.30 MBytes  19.3 Mbits/sec    0    595 KBytes       
     - - - - - - - - - - - - - - - - - - - - - - - - -
     [ ID] Interval           Transfer     Bitrate         Retr
     [  5]   0.00-10.00  sec  14.2 MBytes  11.9 Mbits/sec    0             sender
     [  5]   0.00-10.42  sec  11.6 MBytes  9.36 Mbits/sec                  receiver

$ nstat -az | grep -Ei "drop|overflow|retrans"
     TcpExtListenDrops               1                  0.0
     TcpExtTCPLostRetransmit         11837              0.0
     ...


  • "bashtop" rīks veiktspējas analīzei

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