On Sunday, May 01, 2011 12:20:28 am Jeremy Chadwick wrote: > Anyone know if machdep.cpu_idle_hlt still exists? Taken from acpi(4) on > RELENG_8: > > hw.acpi.cpu.cx_lowest > Lowest Cx state to use for idling the CPU. A scheduling algo- > rithm will select states between C1 and this setting as system > load dictates. To enable ACPI CPU idling control, > machdep.cpu_idle_hlt must be set to 1. > > $ sysctl -d machdep.cpu_idle_hlt > sysctl: unknown oid 'machdep.cpu_idle_hlt' > > I'm taking a stab in the dark here, but it looks like the variable no > longer exists because it's been replaced with, effectively, the > framework that drives machdep.idle and machdep.idle_available > (specifically the mwait_hlt and hlt methods). Doing "grep -r > cpu_idle_hlt /usr/src" turns up nothing other than the cpu_idle_hlt() > functions that live within machdep.c per architecture, and those (based > on the code) correlate with what's shown in machdep.idle_available. > > If I'm correct, I believe that means we can safely remove the last line > of text in the acpi(4) man page? > > There's also a mention of this variable in a file called > src/tools/tools/sysdoc/tunables.mdoc, but I'm not sure what that is.
Hmm, it appears that it is indeed deprecated. -- John Baldwin _______________________________________________ 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"
