On Wed, 2 Nov 2016 18:28:08 +0200, Konstantin Belousov wrote: > On Wed, Nov 02, 2016 at 09:18:15AM -0700, Jason Harmening wrote: > > I think you are probably right. Hacking out the Intel-specific > > additions to C-state parsing in acpi_cpu_cx_cst() from r282678 (thus > > going back to sti;hlt instead of monitor+mwait at C1) fixed the problem > > for me. But r282678 also had the effect of enabling C2 and C3 on my > > system, because ACPI only presents MWAIT entries for those states and > > not p_lvlx.
> You can do the same with "debug.acpi.disabled=mwait" loader tunable > without hacking the code. And set sysctl hw.acpi.cpu.cx_lowest to C1 to > enforce use of hlt instruction even when mwait states were requested. But hw.acpi.cpu.cx_lowest=C1 disables C2 & C3 etc, and Jason wanted those - but without using mwait - if I've read him right? cheers, Ian _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
