Il giorno martedì 13/08/2019 19:06:33 +0200 Ralf Mardorf <ralf.mardorf@xxxxxxxxxxxxx> ha scritto: > you need to do your own research or wait that somebody else does chime in. As I suspected... ;) > However, here are my guesses, no hard facts: > > On Tue, 2019-08-13 at 17:11 +0200, al3xu5 / dotcommon wrote: > > Can you tell me why they shoud be removed now, please? > > https://www.rncbc.org/drupal/comment/6553#comment-6553 Thank you. Also I have read at: https://www.rncbc.org/drupal/comment/6561#comment-6561 ...and now thinga are clear enough. > Regarding timer usage there are anyway a lot of myths and no clear source of > information. RTC vs HPET (HR timer) vs TSC. While TSC should be the best > source, some information claims that TSC could suffer from pitfalls that > render it useless. I know it is a mess... I should have the cpu governor set to performance (no idle): me@arrakis:~$ cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor performance performance performance performance and timers: me@arrakis:~$ ls -l /dev/rtc0 crw-rw---- 1 root audio 253, 0 ago 13 18:15 /dev/rtc0 me@arrakis:~$ ls -l /dev/hpet crw-rw---- 1 root audio 10, 228 ago 13 18:15 /dev/hpet That should be ok I think. > I set up Qtractor to use the default timer as the MIDI queue timer, so it > should be TSC. MIDI is independent from audio, but I suspect it's better, if > audio and MIDI are using the same timer. Not using MIDI... I am using a audio workstation to record (so I need low latencies with possibly no xruns), plus a playback audio server for my hifi system, with a an external USB2 DAC (here I need a clear audio signal with a "precise" clock timing...) > IIRC the keyboard driver was added, since some people experienced the > keyboard being unresponsive, but I might be mistaken. Ah, yes this seems a good explaination... > > Also, consider now I am using rtirq-init version 20150216-2... There is a > > newer (better) version I should use with a sysv-init (NO systemd) machine? > > I don't know. In the paste some versions of rtirq didn't fit to some kernel > versions. There were mismatches with the names in the RTIRQ_NAME_LIST, when > using a brand-new kernel with some of that time current rtirq scripts years > back, when the rtirq scripts were written for previous kernel releases of > that time. Thanks again. I have found this new release: https://www.rncbc.org/drupal/node/1979 I have manually extracted and installed the sysv-init script on my system (4.6.0-0.bpo.1-rt-amd64) and it seems to work fine. Finally I have simply set: RTIRQ_NAME_LIST="rtc0 usb1" and priorities are as expected. Thank you a lot. Regards -- al3xu5 Say NO to copyright, patents, trademarks and any industrial design restrictions. ________________________________________________________________________________ Public GPG/PGP key block ID: 4096 bit RSA key 69C5977BF94CFE23 Fingerprint: 59C6 9DC7 CD4B CF2F A190 E3DE 69C5 977B F94C FE23
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