> I just saw some amazing improvement on this laptop (2GHz, 2G RAM, dual-core,
> >5 years old) by recompiling kernel and glibc in Debian Testing (Jessie) with
> optimizations for this CPU. Overall responsiveness is wonderfully better, 48
> KHz began working well, and stability arrived at 5.33 ms latency in Jack
> (previously 15-20ms...). The current Debian Testing made the glibc recompile
> much more straightforward than I've ever seen it, and I have written it up
> here:
>
> http://notes.ponderworthy.com/rebuild-glibc-optimized-for-your-cpu-in-debian-testing-as-a-local-package-version
>
>
> I don't usually go quite that deep into sysarcana, if any of you out there
> have improvements I'll love to have them and will make sure readers know
> where they came from if desired :-) Cheers to all!!!!!
That's rather interesting, and something that never even occurred to me!
Integrators can have lots of fun too :-) :-) I remember quite a few years ago,
I tried it last, in the Mandrake days. I was surprised then too, but it took so
much effort that I hadn't bothered since. I last investigated under Arch, but
was not able to find anything resembling a straightforward and documented
rebuild process for glibc; there is a build capability in yaourt, but it broke
on glibc, and when I tried to investigate further, to my eyes at least the
sysarcana appeared to exponentialize :-). But recently I have been dipping toes
(now progressing) in a desktop and synth-box migration to Debian Testing, and
decided to check it out again, and discovered that although the process I used
definitely is not anything Debian-SOP, it is done without munging very much,
and the results are quite lovely. It's probably fairly close to the method of
migrating a Debian vanilla package over to Ubuntu or another Debian-compatible,
with particular changes.
And I have not yet tried something I have seen recommended once:
https://packages.debian.org/sid/apt-build
which is said to build a complete repo of CPU-optimized packages. I will be
testing this once I have my synth running Debian as well as my laptop does now.
If it works, the results will be extraordinary.
--
Jonathan E. Brickman
Ponderworthy Music | [email protected] | (785)233-9977 |
http://ponderworthy.com
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