On 05/23/2016 10:05 AM, [email protected] wrote: > I have installed Arch Linux, with 4.6.0.3 Kernel version and performed the > same speedtest. > > Almost the same, from ~0.25Mbps to ~0.35Mbps. > > Do you have any idea why? Why would the distribution matter? > > I choose to install Arch Linux because it came by default with 4.6.x Linux > Kernel, and I didn't need to compile a custom one.
I doubt the distribution matters; I think there's probably something different/wrong with either your test or your h/w setup. What are you using to generate i/o and what are you measuring? What are your termios settings? > luni, 16 mai 2016, 01:12:36 UTC+3, Peter Hurley a scris: > > On 05/15/2016 11:35 AM, [email protected] <javascript:> wrote: >> Thank you for testing! >> >> What distribution are you using? > > The test unit was Ubuntu 14.04.4 with not-quite-vanilla mainline kernel. > > >> duminică, 15 mai 2016, 07:54:55 UTC+3, Peter Hurley a scris: >> >> On 05/14/2016 08:49 AM, [email protected] wrote: >> > That's right, I forgot about start/stop bits. >> > >> > Do 4.x kernels still have this limitation? >> >> A quick i/o test on 4.6.0-rc7 showed no difference in throughput >> between 4096-byte reads and 68-byte reads @ 1.5Mbaud in raw mode. >> >> Both averaged around 144Kchars/sec, or 96% b/w saturation, on >> a not loaded BBB. >> >> NB: the i/o test ran on a single BBB with uart4 sender >> to uart5 receiver. IOW, I would expect similar results at >> full-duplex. >> >> Regards, >> Peter Hurley >> > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/338aa8c7-be2b-406d-a53a-7ed63f209093%40googlegroups.com > > <https://groups.google.com/d/msgid/beagleboard/338aa8c7-be2b-406d-a53a-7ed63f209093%40googlegroups.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/5744CE66.20504%40hurleysoftware.com. For more options, visit https://groups.google.com/d/optout.
