Andriy Gapon wrote: > on 11/09/2010 21:30 Nate Lawson said the following: >>> PROCESSOR-0311 [255895] cpu_attach : acpi_cpu3: P_BLK at 0x410/6 >>> PROCESSOR-0696 [257314] cpu_cx_cst : acpi_cpu3: C2[1] not >>> available. >>> PROCESSOR-0730 [257314] cpu_cx_cst : acpi_cpu3: Got C3 - 245 >>> latency >> I think the issue is that C2 is not available for some reason and thus >> C3 can't be used either. The way to tell is to use acpidump and look for >> the CPU objects' _CST fields. >> > > The "not available" message means that transition latency is defined too high. > That is, in this case latency is greater than 100 for C2.
Just an idea. Limits of 100 and 1000 are defined for detection of C-states using P_LVLx_LAT registers. Because _CST explicitly specifies which states are available, these limitations may not apply there. I would try to comment these checks in acpi_cpu_cx_cst() and look what happen. At least I haven't found in ACPI 3.0 specification any latency limits applied to _CST. -- Alexander Motin _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
