On Fri, Jan 8, 2010 at 7:23 PM, Timo Jyrinki <timo.jyri...@gmail.com> wrote:
> Hi, > > Just FYI to the community list, as slowness has been one of the > biggest problems with Neo. Quite nice speedups are coming: > > > http://lists.openmoko.org/pipermail/openmoko-kernel/2010-January/010811.html > (performance testing by Gennady Kupava) > > Apparently, and unfortunately, no-one had really questioned Om Inc:s > (who mainly did the kernel work back in the days of the still mostly > used 2.6.29) choices of kernel configuration. Disabling kernel debug > features and pre-empt has resulted eg. these kind of improvements > (from IRC, #openmoko-fi): > - boot time 68.5% of original > - "apt-cache search nano" 20s -> 14.8s > - "emacs -f kill-emacs" 3.8s -> 2.2s > > These configuration changes are not yet in andy-tracking (the 2.6.29 > kernel still being used in most distros), I don't know what's the > situation in the new om-2.6.32 branch. Together with the quite recent > commit from Thomas White that doubled theoretical glamo speeds (in > practice at least 20% in general), I feel that Neo FreeRunner is not > anymore "terribly slow", but only "slow" by today's standards, which > is quite an improvement. Especially after having been used to the > "terribly slow" general behavior ;) > > Please tell if some distro happened to have those disabled already, > and if someone knew about these speedups via the options already - and > please arrange a commit to git.openmoko.org next time! Anyway, this > all goes to show that in a project with limited resources like > Openmoko, especially now that it's completely in the hands of the > community when it comes to Neo FreeRunner development, you have to > have the courage to question anything "suspicious" etc. you are > seeing, not trusting that someone has actually optimized something to > the extent assumed. > > If you want to have a quick grab of the new kernel for Debian (or any > distro that loads uImage from a file), I put my compilation of kernel > and modules to > http://users.tkk.fi/~tajyrink/moko/kernel_20100108_nodebug_nopreempt/ > > -Timo, wishing everyone a speedier new year > > ha ha, great work man! I'll try it soon! d
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