Alexander Motin wrote: > Jeremy Chadwick wrote: >> I should note that on RELENG_7, EIST/SpeedStep didn't appear to work >> properly (cpufreq(4) driver reporting that the est piece wouldn't >> attach), which historically (for me) has resulted in ACPI throttling >> being done (which works). Based on the sysctl output below, I believe >> acpi_perf is in use, but I'm not 100% certain. The man page doesn't >> really disclose how to determine which driver is in use. >> >> The X7SBA system in question is below. Be aware I limit the lowest >> clock frequency to 1500MHz using debug.cpufreq.lowest="1500" in >> /boot/loader.conf, which is why you don't see anything lower in >> freq_levels. >> >> dev.est.0.freq_settings: 3000/35000 2667/28000 2333/22000 2000/16000 > > This is the real set of EIST supported levels. > >> dev.cpu.0.freq_levels: 3000/35000 2667/28000 2333/22000 2041/19250 > 2000/16000 1750/14000 1500/12000 > > All the rest of these are throttling. > > I would recommend you to disable it by setting: > hint.p4tcc.0.disabled=1 > hint.acpi_throttle.0.disabled=1
> dev.cpu.1.cx_supported: C1/0 C2/85 And you may also enable C2 state, as your ACPI reports it, and it should be safe now. To get maximum effect from it you may wish to reduce HZ. -- Alexander Motin _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
