Hello gentlemen, it seems CPU_SUSP_HLT does nothing for SMP kernels.
i386/i386/machdep.c: #ifdef SMP static int cpu_idle_hlt = 0; #else static int cpu_idle_hlt = 1; #endif It's noted that when enabled it will result in about 4.2% loss in performance while doing buildworld. I haven't checked with that, but I tested single-threaded applications to suffer for about 2%, what shouldn't be a big difference. Beyond power consumption, suspend on HLT may solve some overheating issues common for multiprocessor systems. At least, it does so in my case. I suggest to remove #ifdef SMP, and place a warning into NOTES. Let people decide. --- Regards, Rhett ________________________________________________________________________ Want to chat instantly with your online friends? Get the FREE Yahoo! Messenger http://uk.messenger.yahoo.com/ _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "[EMAIL PROTECTED]"
