On Wed, 25 Jul 2007 [EMAIL PROTECTED] wrote: >On Wed, 25 Jul 2007, V.I.Victor wrote: > >> On Wed, 25 Jul 2007 [EMAIL PROTECTED] wrote: >> >>> On Wed, 25 Jul 2007, V.I.Victor wrote: >>> >>>> On Wed, 25 Jul 2007, Garrett Cooper wrote: >>>> >>>>> V.I.Victor wrote: >>>>>> I've two 5.4 desktop boxes. Pretty much the same installation; both >>>>>> from the same CD, same apps, no monitor/keyboard, 1-user logged-on via >>>>>> ssh (command-line only w/no gui) and otherwise lightly loaded. >>>>>> >>>>>> Box_A: CPU: AMD-K7(tm) Processor (598.84-MHz 686-class CPU) >>>>>> avail memory = 121630720 (115 MB) >>>>>> ACPI disabled by blacklist. >>>>>> >>>>>> Box_B: CPU: Intel(R) Pentium(R) 4 CPU 1.80GHz (1794.19-MHz 686-class >>>>>> CPU) >>>>>> avail memory = 252186624 (240 MB) >>>>>> cpu0: <ACPI CPU> on acpi0 >>>>>> acpi_throttle0: <ACPI CPU Throttling> on cpu0 >>>>>> ... >>>> >>>>> Yes. On my virtual machine with ACPI: >>>>> >>>>> dev.cpu.0.freq: 2653 >>>>> dev.cpu.0.freq_levels: 2653/-1 2321/-1 1989/-1 1658/-1 1326/-1 994/-1 >>>>> 663/-1 >>>>> 331/-1 >>>>> >>>>> [EMAIL PROTECTED] ~]# dmesg | grep 26 >>>>> FreeBSD 7.0-CURRENT #5: Tue Jul 17 08:22:26 UTC 2007 >>>>> CPU: Intel(R) Core(TM)2 CPU 6700 @ 2.66GHz (2666.79-MHz K8-class >>>>> CPU) >>>>> Timecounter "TSC" frequency 2666794890 Hz quality 800 >>>>> >>>>> What are the following sysctls set to? >>>>> >>>>> kern.clockrate >>>>> hw.acpi.cpu.cx_lowest >>>>> dev.cpu.0.cx_lowest >>>>> dev.cpu.0.cx_usage >>>> >>>> Thanks for the reply! I don't seem to have the last 2 you've asked about. >>>> >>>> 'sysctl -a | egrep "clockrate|cpu"' reported the following: >>>> >>>> kern.clockrate: { hz = 100, tick = 10000, profhz = 1024, stathz = 128 } >>>> kern.threads.virtual_cpu: 1 >>>> kern.ccpu: 1948 >>>> kern.smp.maxcpus: 1 >>>> kern.smp.cpus: 1 >>>> hw.ncpu: 1 >>>> hw.clockrate: 1794 >>>> hw.acpi.cpu.cx_supported: C1/0 >>>> hw.acpi.cpu.cx_lowest: C1 >>>> hw.acpi.cpu.cx_usage: 100.00% >>>> machdep.cpu_idle_hlt: 1 >>>> dev.cpu.0.%desc: ACPI CPU >>>> dev.cpu.0.%driver: cpu >>>> dev.cpu.0.%location: handle=\_PR_.CPU0 >>>> dev.cpu.0.%pnpinfo: _HID=none _UID=0 >>>> dev.cpu.0.%parent: acpi0 >>>> dev.cpu.0.freq: 1796 >>>> dev.cpu.0.freq_levels: 1796/-1 1571/-1 1347/-1 1122/-1 898/-1 673/-1 >>>> 449/-1 224/-1 >>>> dev.acpi_throttle.0.%parent: cpu0 >>>> dev.cpufreq.0.%driver: cpufreq >>>> dev.cpufreq.0.%parent: cpu0 >>> >>> >>> >>> Do you have SMP enabled? >> >> No. Both boxes have pretty minimal, basic installations. >> >>> You also might be able to tune the kernel clock rate to obtain better >>> performance; I forget what the values were for sysctl, but if you search >>> around the current@ archives a bit, there was a discussion involving VMware >>> and clock tuning approximately 2-3 months ago which details this issue, and >>> possible solutions. >> >> Perhaps tuning could help. I'll check the archives. >> >> However, it just seems to me that the 1.8 GHz box ought to perform the >> simple prog (orig post) at least as fast as the 6 MHz box. > > Depends on: > 1. What you're trying to do. > 2. What your programs are optimized for. > 3. Additional factors (I/O, load, etc). > 4. Hardware attached to each machine. Some examples... > a. Comparing a SCSI disk vs a PATA disk. > b. Clockspeed applied to the RAM on one machine isn't equal to the other. > c. Motherboard manufacturers -- some manufacturers have done a shoddy job > with memory handling, BIOS manufacturing, and other critical stats in the > past. > > Try disabling ACPI on the P4 though and see what happens. I will say though, > the Willamette (1st gen P4) chips weren't Intel's finest desktop chip; some > people went far enough to complain that the Willamette series was nothing > more than overclocked Coppermines, i.e. P3's. I haven't taken a look at the > architectures and compared them, so those may be empty claims.
I was wondering about the "truth-of-clockspeed." Perhaps the 1800-MHz only applies to CPU internal cache, etc. while the external bus-clocking is down at 500-MHz or so. Sounds like a typical marketing ploy! About disabling the ACPI... Can I do it *safely* via the remote-ssh connection? Or do I need to be at the box w/ keyboard and monitor? What I've read makes it seem that the ACPI is set at boot-time. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"