On Tue, May 04, 2004 at 09:39:48PM -0500, Erik Meitner wrote: > I have an HP nx9005(model DK993A with an AMD XP-M 2400+) installed with > Debian/testing and kernel 2.6.4. I am trying to track down a performance > problem. > When powered by AC the system performance is excellent. When powered by > battery, the system is so sluggish that I prefer to just not use it. It > is like it was running at 200 MHz. > This occurs with frequency scaling turned OFF and the CPU running at > 1788MHz. Is this the result of on-chip powersaving systems of the CPU, > such as the delay time for the chip to go from low-power mode to full > power? Is there any way of tweaking this behavior? > > Note the differences in the results of the bogomips benchmark below. > Since /proc/cpuinfo shows the same value, AFAIK there is no frequency change using cpufreq. Check /proc/acpi/processor/CPU0/throttling though. You can throttle the cpu using acpi which doesn't cause /etc/cpuinfo to show a different frequency. Could be that you have a frequency handling daemon that uses acpi instead of cpufreq to throttle you laptop? > Thanks, > Erik > > > > Relvant lines from kernel messages: > > CPU#0: Initializing > PID hash table entries: 4096 (order 12: 32768 bytes) > Detected 1788.655 MHz processor. > CPU#0: Calibrating delay loop... 3538.94 BogoMIPS > CPU#0: After generic identify, caps: 0383f9ff c1cbf9ff 00000000 00000000 > CPU#0: After vendor identify, caps: 0383f9ff c1cbf9ff 00000000 00000000 > CPU#0: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line) > CPU#0: L2 Cache: 512K (64 bytes/line) > CPU#0: After all inits, caps: 0383f9ff c1cbf9ff 00000000 00000020 > CPU#0: Intel machine check architecture supported. > CPU#0: Intel machine check reporting enabled. > CPU: AMD mobile AMD Athlon(tm) XP2400+ stepping 00 > CPU#0: Enabling fast FPU save and restore... done. > CPU#0: Enabling unmasked SIMD FPU exception support... done. > CPU#0: Checking 'hlt' instruction... OK. > CPU#0: Machine check exception polling timer started. > powernow: PowerNOW! Technology present. Can scale: frequency and voltage. > powernow: Found PSB header at c00f15c0 > powernow: Table version: 0x12 > powernow: Flags: 0x0 (Mobile voltage regulator) > powernow: Settling Time: 100 microseconds. > powernow: Has 14 PST tables. (Only dumping ones relevant to this CPU). > powernow: PST:12 (@c00f16ac) > powernow: cpuid: 0x781 fsb: 133 maxFID: 0x15 startvid: 0xb > powernow: FID: 0x12 (4.0x [532MHz]) VID: 0x13 (1.200V) > powernow: FID: 0x4 (5.0x [665MHz]) VID: 0x13 (1.200V) > powernow: FID: 0x6 (6.0x [798MHz]) VID: 0x13 (1.200V) > powernow: FID: 0x8 (7.0x [931MHz]) VID: 0x13 (1.200V) > powernow: FID: 0xe (10.0x [1330MHz]) VID: 0xe (1.300V) > powernow: FID: 0x15 (13.5x [1795MHz]) VID: 0xb (1.450V) > > powernow: Minimum > speed 532 MHz. Maximum speed 1795 MHz. > > (Note, I have a patch applied to my kernel to set the cpuid to 0x781 so > that the powernow scaling driver works. The original cpuid is 0x7a0) Just interested, where did you find the right cpuid to use? I have an AMD XP-M 1500+ and powernow shows the scaling table (FID is ok) but it doesn't show the voltage scaling options properly (VID don't change it uses 1.3V for all frequencies). > > > On AC power: > ============ > ============ > > nx9:~# bogomips > Calibrating delay loop.. ok - 1760.00 BogoMips > > /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq: > 1795500 > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq: > 532000 > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies: > 532000 665000 798000 931000 1330000 1795500: > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors: > powersave userspace performance > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver: > powernow-k7 > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor: > performance > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: > 1795500 > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq: > 532000 > > /proc/cpuinfo: > processor : 0 > vendor_id : AuthenticAMD > cpu family : 6 > model : 10 > model name : mobile AMD Athlon(tm) XP2400+ > stepping : 0 > cpu MHz : 1788.828 > cache size : 512 KB > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 1 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca > cmov pat pse36 mmx fxsr sse syscall mp mmxext 3dnowext 3dnow > bogomips : 3538.94 > > > nx9:/proc/acpi/processor/CPU0# more * > :::::::::::::: > info > :::::::::::::: > processor id: 0 > acpi id: 0 > bus mastering control: yes > power management: yes > throttling control: no > limit interface: no > :::::::::::::: > limit > :::::::::::::: > <not supported> > :::::::::::::: > power > :::::::::::::: > active state: C2 > default state: C1 > bus master activity: 00000000 > states: > C1: promotion[C2] demotion[--] latency[000] > usage[00029760] > *C2: promotion[--] demotion[C1] latency[100] > usage[00418342] > C3: <not supported> > :::::::::::::: > throttling > :::::::::::::: > <not supported> > > > > On battery power: > ================ > ================ > > nx9:~# bogomips > Calibrating delay loop.. ok - 612.00 BogoMips > > /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq: > 1795500 > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq: > 532000 > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies: > 532000 665000 798000 931000 1330000 1795500 > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors: > powersave userspace performance > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver: > powernow-k7 > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor: > performance > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: > 1795500 > :::::::::::::: > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq: > 532000 > > cat /proc/cpuinfo: > processor : 0 > vendor_id : AuthenticAMD > cpu family : 6 > model : 10 > model name : mobile AMD Athlon(tm) XP2400+ > stepping : 0 > cpu MHz : 1788.828 > cache size : 512 KB > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 1 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca > cmov pat pse36 mmx fxsr sse syscall mp mmxext 3dnowext 3dnow > bogomips : 3538.94 > > > nx9:/proc/acpi/processor/CPU0# more * > :::::::::::::: > info > :::::::::::::: > processor id: 0 > acpi id: 0 > bus mastering control: yes > power management: yes > throttling control: no > limit interface: no > :::::::::::::: > limit > :::::::::::::: > <not supported> > :::::::::::::: > power > :::::::::::::: > active state: C2 > default state: C1 > bus master activity: 00000000 > states: > C1: promotion[C2] demotion[--] latency[000] > usage[00028280] > *C2: promotion[--] demotion[C1] latency[100] > usage[00379537] > C3: <not supported> > :::::::::::::: > throttling > :::::::::::::: > <not supported> > > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > > > +++++++++++++++++++++++++++++++++++++++++++ > This Mail Was Scanned By Mail-seCure System > at the Tel-Aviv University CC. > -- Kernelnewbies: Help each other learn about the Linux kernel. 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