I'm not familiar with panda, but I've used this in the kernel configuration file for another device: CONFIG_CPU_IDLE=n But watch out because it will use more power of course.
On Monday, October 1, 2012 7:59:40 AM UTC-7, Sagar Shinde wrote: > > Hi, > > We were trying to figure out the network throughput on eth0 using iperf to > send data over Ethernet. > We are using ICS 4.0.4 with kernel 3.0.8 on Pandaboard. Eth0 gives very > bad throughput in fact it almost does not work. > > One strange thing we noticed is that when we keep the display (connected > to pandaboard) busy (eg. keep moving mouse or have GIF in browser), then > the throughput suddenly improves a lot. Infact it seems that the networking > over eth0 starts working. Same was the result when I run a script in the > background which just does "ls" in a loop after every 1ms interval. > > Only conclusion, I could draw was that CPU goes idle in ICS and thus the > throughput suffers. > I searched and found out that WFI (wait for interrupt) when enabled makes > CPU goes idle until given an interrupt. > I tried to disable it by adding "nohlt" in kernel boot args, but the > throughput din't improve. > > Is there something more we can do prevent CPU from going idle? > > BR > Sagar > -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel
