Hi, We catched this problem in a solaris power related characterization report. In an idle system, all the logical CPUs are ~99% in deep C-state while the package can't enter deep C-state. Theoretically, if all the logical CPUs in a package can enter deep C-state, the package should be able to enter deep C-state as well.
The cases here: 1) If we disabled USB2.0 in the BIOS, the problem is gone. 2) Remove EHCI driver and reboot, the problem is gone. 3) If we plugged a USB stick onto the box, without any read/write operations, the package C-state is throttled as well, this is not expected. If we boot the system with other OS, we didn't see any of these problems. So these are more likely the software problem. Any helps will be greatly appreciated. Thanks, -Aubrey _______________________________________________ driver-discuss mailing list driver-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/driver-discuss
