I only get around 400pps when using -i1

[k79e]

IDK is it normal? But when I use -i0 it got faster. Then it dropped. I don't know why but -i1 can never be faster. When I using -i0 the speed looks dynamic. (Maybe it's because I used all cpu? But with -i1 it never 100% cpu)

I used it on lan to test and found that -i1 can't even up to 1000pps!!! It looks around 300pings/s Then I changed to a value which smaller than 1 and speed become veryfast.

2019-10-05 22:28:19 Well I found that pps dropped to around 300 but fping still using 100% cpu!!!! Maybe it becomes stucks?? when I use -i0? But I when I run another instence at the same time to ping a lan ip it can faster than 1000pps

Hey didn't this tool is async ping so the sending rate should be fixed?

[Jimmy-Z]

I'm not the developer but I'm a bit curious about this to so I did some test myself

# time fping -c 1000 -t 100 -i 1 -p 1 -q 192.168.0.1
192.168.0.1 : xmt/rcv/%loss = 1000/1000/0%, min/avg/max = 0.20/0.70/2.12

real    0m1.070s
user    0m0.000s
sys     0m0.080s

So doesn't seem to be true here. 192.168.0.1 is another vm but on the same host.

# time fping -c 1000 -t 100 -i 0 -p 0 -q 192.168.0.1
192.168.0.1 : xmt/rcv/%loss = 1000/652/34%, min/avg/max = 7.26/26.0/43.0

real    0m0.106s
user    0m0.001s
sys     0m0.007s

I never knew you could -i 0 (man page says minimum 1), I'm reaching 9.4kpps AFAICT, but that 34% loss rate is something alarming, that's a pfsense gateway, maybe it's limiting echo rate.

# time fping -c 1000 -t 100 -i 0 -p 0 -q 127.0.0.1
127.0.0.1 : xmt/rcv/%loss = 1000/1000/0%, min/avg/max = 0.00/0.00/0.29

real    0m0.014s
user    0m0.000s
sys     0m0.013s

This is reaching 71kpps.

[k79e]

Mine time fping -c5000 -i1 -p1 127.0.0.1 -q 127.0.0.1 : xmt/rcv/%loss = 5000/5000/0%, min/avg/max = 0.01/0.04/0.23

real 0m9.880s user 0m0.000s sys 0m0.636s

[schweikert]

I don't understand what problem you are describing. -i1 means that fping will verify that no more than 1 ping is sent every 1 ms. That explains why you can't get more than 1000pps with that.

[Akalanka1337]

What type of packets are received ? fping -e -c 3 192.168.112.168

?