From: Chris W. <whi...@gm...> - 2010-07-26 14:26:56
|
If I use the overo angstrom branch kernel, I get consistent low (good) ping response times. If I use the mainline angstrom stuff, which uses the TI PSP kernel, I get ping responses, but the times are all over the place-- sometimes quite high. Then under load, it looks like I get dropped packets. Anyone recognize this issue? Could it be interrupt related? thanks, chris |
From: J. L. <vwy...@gm...> - 2010-07-26 19:08:28
|
To me its seems the wifi is just a hit or miss as to if you get good results with it or not. But I am a beginner with all this so that could lead to some of my issues as well. But my plug in USB adapter gives me no issues. Though I have never tried the kernel your using. On Mon, Jul 26, 2010 at 7:26 AM, Chris Whittenburg <whi...@gm...> wrote: > If I use the overo angstrom branch kernel, I get consistent low (good) > ping response times. > > If I use the mainline angstrom stuff, which uses the TI PSP kernel, I > get ping responses, but the times are all over the place-- sometimes > quite high. Then under load, it looks like I get dropped packets. > > Anyone recognize this issue? Could it be interrupt related? > > thanks, > chris > > ------------------------------------------------------------------------------ > The Palm PDK Hot Apps Program offers developers who use the > Plug-In Development Kit to bring their C/C++ apps to Palm for a share > of $1 Million in cash or HP Products. Visit us here for more details: > http://ad.doubleclick.net/clk;226879339;13503038;l? > http://clk.atdmt.com/CRS/go/247765532/direct/01/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |
From: Chris W. <whi...@gm...> - 2010-07-26 20:48:25
|
Sorry, this is with the hardwired ethernet, not wifi. We looked into it a little more, and it seems when I used the PSP kernel, the interrupt line from the smsc911x is crazy, like 96 mhz signal, and during boot the kernel disables IRQ 336-- I guess from the high frequency spurious interrupts. When we use the "overo" branch kernel, the interrupt line is nice and clean, as expected. We've tried the same uboot on both, so we know it's not a uboot problem. I compared the smsc911x drivers between the two kernels, and they are consistent. The only thing I can think it might be is the pinmux setting. The mux code between the two kernels is quite different, so it's hard to do a comparison. If anyone has any insight, I would appreciate it. I think I've mentioned before I would love to use the overo branch stuff, but my app requires the ISP. Thanks, Chris vwyodapink wrote: > > To me its seems the wifi is just a hit or miss as to if you get good > results with it or not. But I am a beginner with all this so that > could lead to some of my issues as well. But my plug in USB adapter > gives me no issues. Though I have never tried the kernel your using. > > > > On Mon, Jul 26, 2010 at 7:26 AM, Chris Whittenburg > <whi...@gm...> wrote: >> If I use the overo angstrom branch kernel, I get consistent low (good) >> ping response times. >> >> If I use the mainline angstrom stuff, which uses the TI PSP kernel, I >> get ping responses, but the times are all over the place-- sometimes >> quite high. Then under load, it looks like I get dropped packets. >> >> Anyone recognize this issue? Could it be interrupt related? >> >> thanks, >> chris >> >> ------------------------------------------------------------------------------ >> The Palm PDK Hot Apps Program offers developers who use the >> Plug-In Development Kit to bring their C/C++ apps to Palm for a share >> of $1 Million in cash or HP Products. Visit us here for more details: >> http://ad.doubleclick.net/clk;226879339;13503038;l? >> http://clk.atdmt.com/CRS/go/247765532/direct/01/ >> _______________________________________________ >> gumstix-users mailing list >> gum...@li... >> https://lists.sourceforge.net/lists/listinfo/gumstix-users >> > > ------------------------------------------------------------------------------ > The Palm PDK Hot Apps Program offers developers who use the > Plug-In Development Kit to bring their C/C++ apps to Palm for a share > of $1 Million in cash or HP Products. Visit us here for more details: > http://ad.doubleclick.net/clk;226879339;13503038;l? > http://clk.atdmt.com/CRS/go/247765532/direct/01/ > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > ----- > Just a beginner trying to learn his way around. > -- View this message in context: http://old.nabble.com/Varying-ping-response-times-tp29267146p29270555.html Sent from the Gumstix mailing list archive at Nabble.com. |