Measuring Network Latency In Solaris

Use the below dtrace script (SuperPing.d) to measuring Network Latency.

#!/usr/sbin/dtrace -s

#pragma D option quiet
#pragma D option switchrate=10hz

mib:::rawipOutDatagrams
/pid == $target/
{
        start = timestamp;
}

mib:::icmpInEchoReps
/start/
{
        this->delta = (timestamp - start) / 1000;
        printf("dtrace measured: %d us\n", this->delta);
        @a["\n  ICMP packet delta average (us):"] = avg(this->delta);
        @q["\n  ICMP packet delta distribution (us):"] =
            lquantize(this->delta, 0, 1000000, 100);
        start = 0;
}

Run it like the below.

./superping.d -c "ping -s 10.151.19.10"

ctr ^c - to stop

Sample output.

----10.151.19.10 PING Statistics----
62 packets transmitted, 62 packets received, 0% packet loss

dtrace measured: 410 us

     
  ICMP packet delta average (us):                              430 
     
  ICMP packet delta distribution (us):               
           value  ------------- Distribution ------------- count        
             200 |                                         0            
             300 |@@@@@@@@                                 12    
             400 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@          48    
             500 |@                                        1    
             600 |@                                        1    
             700 |                                         0    

round-trip (ms)  min/avg/max/stddev = 0.748/0.850/1.076/0.049