2

Model B, Raspbian, Wi-Pi vs Macbook Pro

Setup

  • Both devices are sitting right next to eachother
  • Connected to the same router.
  • traceroute is the same for both
  • Even typing on the Pi via SSH feels slow

Is there any way to get the latency down?

R.Pi

64 bytes from 4.2.2.1: icmp_req=185 ttl=54 time=489 ms
64 bytes from 4.2.2.1: icmp_req=186 ttl=54 time=718 ms
64 bytes from 4.2.2.1: icmp_req=187 ttl=54 time=536 ms
64 bytes from 4.2.2.1: icmp_req=188 ttl=54 time=563 ms
64 bytes from 4.2.2.1: icmp_req=190 ttl=54 time=409 ms
64 bytes from 4.2.2.1: icmp_req=191 ttl=54 time=429 ms
64 bytes from 4.2.2.1: icmp_req=192 ttl=54 time=453 ms
64 bytes from 4.2.2.1: icmp_req=193 ttl=54 time=476 ms
64 bytes from 4.2.2.1: icmp_req=194 ttl=54 time=183 ms
64 bytes from 4.2.2.1: icmp_req=196 ttl=54 time=344 ms

OS X

64 bytes from 4.2.2.1: icmp_seq=180 ttl=54 time=182.338 ms
64 bytes from 4.2.2.1: icmp_seq=181 ttl=54 time=181.657 ms
64 bytes from 4.2.2.1: icmp_seq=182 ttl=54 time=181.700 ms
64 bytes from 4.2.2.1: icmp_seq=183 ttl=54 time=182.498 ms
64 bytes from 4.2.2.1: icmp_seq=184 ttl=54 time=181.373 ms
64 bytes from 4.2.2.1: icmp_seq=185 ttl=54 time=187.886 ms
64 bytes from 4.2.2.1: icmp_seq=186 ttl=54 time=181.224 ms
64 bytes from 4.2.2.1: icmp_seq=187 ttl=54 time=185.362 ms
64 bytes from 4.2.2.1: icmp_seq=188 ttl=54 time=180.515 ms
3
  • bad power supply most likley reason. the Wifi doesnot have enough juice to go full power.
    – Piotr Kula
    Feb 6, 2014 at 18:39
  • @ppumkin, in hopes, I changed it to a 1A powersupply and still no luck. thanks though.
    – nitsujri
    Feb 7, 2014 at 1:03
  • Yea... I gave up with WiFi on my Pi because I had the same problem.. but your using WiPi....? NOt sure what the problem is :(
    – Piotr Kula
    Feb 7, 2014 at 9:38

1 Answer 1

0

I found one thread where a guy had trouble streaming at 720p with the WiPi. He overclocked it and he got a lot closer to 720.

It works.

pi@raspberrypi:~$ ping 4.2.2.1
PING 4.2.2.1 (4.2.2.1) 56(84) bytes of data.
64 bytes from 4.2.2.1: icmp_req=1 ttl=54 time=179 ms
64 bytes from 4.2.2.1: icmp_req=2 ttl=54 time=177 ms
64 bytes from 4.2.2.1: icmp_req=3 ttl=54 time=251 ms
64 bytes from 4.2.2.1: icmp_req=4 ttl=54 time=177 ms
64 bytes from 4.2.2.1: icmp_req=5 ttl=54 time=177 ms
64 bytes from 4.2.2.1: icmp_req=6 ttl=54 time=178 ms
64 bytes from 4.2.2.1: icmp_req=7 ttl=54 time=178 ms

My settings from here in /boot/config.txt:

arm_freq=1000
core_freq=500
sdram_freq=500
over_voltage=6
force_turbo=0

These settings are safe as long as force_turbo=0 via here, here, here.

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