[maemo-developers] Slow operations trough ssh, connected to my N810

[From: Kalle Valo]

"ext Andrea Grandi" <a.grandi at gmail.com> writes:

> I tried turning the power management off, and these are the ping results:
>
> Nokia-N810-50-2:~# ping 192.168.0.1
> PING 192.168.0.1 (192.168.0.1): 56 data bytes
> 64 bytes from 192.168.0.1: seq=0 ttl=255 time=5.2 ms
> 64 bytes from 192.168.0.1: seq=1 ttl=255 time=4.9 ms
> 64 bytes from 192.168.0.1: seq=2 ttl=255 time=4.7 ms
> 64 bytes from 192.168.0.1: seq=3 ttl=255 time=4.7 ms
> 64 bytes from 192.168.0.1: seq=4 ttl=255 time=4.7 ms
> 64 bytes from 192.168.0.1: seq=5 ttl=255 time=4.5 ms
> 64 bytes from 192.168.0.1: seq=6 ttl=255 time=4.7 ms
> 64 bytes from 192.168.0.1: seq=7 ttl=255 time=4.7 ms
>
> --- 192.168.0.1 ping statistics ---
> 8 packets transmitted, 8 packets received, 0% packet loss
> round-trip min/avg/max = 4.5/4.7/5.2 ms

You are pinging the wrong way, you should ping from network to N810.
>From N810 to network it's always fast.

> result: the power management of N810 really SUCKS!!!

Power Save Mode adds latency significantly, and that's how it is
designed. You cannot break laws of physics, you know.

But you can always disable Power Save Mode, which again means that the
battery will ran out within ten hours even if the display is turned
off and CPU is sleeping. So (again) it's either low latency or minimum
power consumption, not both.

-- 
Kalle Valo