Date: Mon, 31 Aug 2009 00:40:15 +0900 (JST) From: Junichi Satoh <junichi@junichi.org> To: freebsd-hackers@freebsd.org Subject: Frequency and core voltage adjustment for AMD CPUs. Message-ID: <20090831.004015.74756379.junichi@junichi.org>
next in thread | raw e-mail | index | archive | help
Hello, I did functionality expansion of cpufreq driver for AMD CPUs, "powernow.c" and "hwpstate.c". It can change frequency and core voltage from default in each P-states by definition of device.hints. Patch file against cpufreq driver: http://configure.sh/FreeBSD/cpufreq.html http://configure.sh/FreeBSD/cpufreq-j.html (Japanese) At least, it works well with my FreeBSD box, HP ProLiant ML115 G5. But, I don't know whether it works with other hardwares. Can anyone test this patch? Any comments and suggestions are welcome. - How to change frequency or core voltage. Define difference value from default in /boot/device.hints as follows. hint.{drivername}.0.adjfreq=XXX CPU frequency(MHz) of difference from default in all P-states. hint.{drivername}.0.adjfreqN=XXX CPU frequency(MHz) of difference from default in P-state N. hint.{drivername}.0.adjvcore=XXX CPU core voltage(mV) of difference from default in all P-states. hint.{drivername}.0.adjvcoreN=XXX CPU core voltage(mV) of difference from default in P-state N. *{drivername} is "powernow" or "hwpstate". Frequency and core voltage can be defined by an arbitrary value, but it is adjusted automatically by the nearest value that CPU allows. For example, the driver sets +100MHz if you define "adjfreq=110" when frequency step that specified by CPU is 100MHz. - Example 1 OS : FreeBSD 8.0-BETA2 H/W: HP ProLiant ML115 G5 CPU: Athlon 1640B (2.7GHz) /boot/device.hints: ======================================================================== hint.powernow.0.adjvcore="-200" -> Core voltage is set to -200mV from default in all P-states. hint.powernow.0.adjfreq="-100" -> Frequency is set to -100MHz from default in all P-states. hint.powernow.0.adjfreq0="0 -> Frequency is set to default in P-state0. ======================================================================== dmesg: ======================================================================== Copyright (c) 1992-2009 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD is a registered trademark of The FreeBSD Foundation. FreeBSD 8.0-BETA2 #56: Sun Aug 23 10:34:37 JST 2009 junichi@shiga.pn.junichi.org:/usr/src/sys/amd64/compile/SHIGA WARNING: WITNESS option enabled, expect reduced performance. Timecounter "i8254" frequency 1193182 Hz quality 0 CPU: AMD Athlon(tm) Processor 1640B (2700.02-MHz K8-class CPU) Origin = "AuthenticAMD" Id = 0x70ff2 Stepping = 2 Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2> Features2=0x2001<SSE3,CX16> AMD Features=0xea500800<SYSCALL,NX,MMX+,FFXSR,RDTSCP,LM,3DNow!+,3DNow!> AMD Features2=0x11d<LAHF,SVM,ExtAPIC,CR8,Prefetch> real memory = 2147483648 (2048 MB) avail memory = 4105457664 (3915 MB) ACPI APIC Table: <HP ProLiant> ioapic0 <Version 1.1> irqs 0-23 on motherboard kbd1 at kbdmux0 acpi0: <HP ProLiant> on motherboard acpi0: [ITHREAD] acpi0: Power Button (fixed) acpi0: reservation of fec00000, 1000 (3) failed acpi0: reservation of fee00000, 1000 (3) failed Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000 acpi_timer0: <24-bit timer at 3.579545MHz> port 0x2008-0x200b on acpi0 acpi_hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0 Timecounter "HPET" frequency 25000000 Hz quality 900 .... cpu0: <ACPI CPU> on acpi0 powernow0: <PowerNow! K8> on cpu0 powernow0: P-state0: 2700MHz->2700MHz, 1350mV->1150mV powernow0: P-state1: 2600MHz->2500MHz, 1325mV->1125mV powernow0: P-state2: 2400MHz->2300MHz, 1275mV->1075mV powernow0: P-state3: 2200MHz->2100MHz, 1225mV->1025mV powernow0: P-state4: 2000MHz->1900MHz, 1175mV->975mV powernow0: P-state5: 1800MHz->1700MHz, 1125mV->925mV powernow0: P-state6: 1000MHz->900MHz, 1100mV->900mV ... ======================================================================== Result of "sysctl dev.cpu.0.freq_levels": ======================================================================== dev.cpu.0.freq_levels: 2700/50000 2500/46381 2300/39643 2100/33545 1900/28057 1700/23148 900/12249 ======================================================================== - Example 2 OS: FreeBSD 8.0-BETA3 H/W: HP ProLiant ML115 G5 CPU: Phenom 9850 Black Edition (2.5GHz) /boot/device.hints: ======================================================================== hint.hwpstate.0.adjfreq0="200" -> Frequency is set to +200MHz(over clock) from default in P-state0. hint.hwpstate.0.adjfreq1="-350" -> Frequency is set to -350MHz from default in P-state1. hint.hwpstate.0.adjvcore1="-175" -> Core voltage is set to -175mV from default in P-state1. ======================================================================== dmesg: ======================================================================== Copyright (c) 1992-2009 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD is a registered trademark of The FreeBSD Foundation. FreeBSD 8.0-BETA3 #0: Mon Aug 24 23:29:36 JST 2009 junichi@shiga.pn.junichi.org:/usr/src/sys/amd64/compile/SHIGA WARNING: WITNESS option enabled, expect reduced performance. Timecounter "i8254" frequency 1193182 Hz quality 0 CPU: AMD Phenom(tm) 9850 Quad-Core Processor (2500.02-MHz K8-class CPU) Origin = "AuthenticAMD" Id = 0x100f23 Stepping = 3 Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT> Features2=0x802009<SSE3,MON,CX16,POPCNT> AMD Features=0xee500800<SYSCALL,NX,MMX+,FFXSR,Page1GB,RDTSCP,LM,3DNow!+,3DNow!> AMD Features2=0x7ff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,IBS> TSC: P-state invariant real memory = 5100273664 (4864 MB) avail memory = 4105482240 (3915 MB) ACPI APIC Table: <HP ProLiant> FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs FreeBSD/SMP: 1 package(s) x 4 core(s) cpu0 (BSP): APIC ID: 0 cpu1 (AP): APIC ID: 1 cpu2 (AP): APIC ID: 2 cpu3 (AP): APIC ID: 3 ioapic0 <Version 1.1> irqs 0-23 on motherboard kbd1 at kbdmux0 acpi0: <HP ProLiant> on motherboard acpi0: [ITHREAD] acpi0: Power Button (fixed) acpi0: reservation of fec00000, 1000 (3) failed acpi0: reservation of fee00000, 1000 (3) failed Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000 acpi_timer0: <24-bit timer at 3.579545MHz> port 0x2008-0x200b on acpi0 acpi_hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0 Timecounter "HPET" frequency 25000000 Hz quality 900 ... cpu0: <ACPI CPU> on acpi0 hwpstate0: P-state0: 2500MHz->2700MHz, 1300mV->1300mV hwpstate0: P-state1: 1250MHz->900MHz, 1050mV->875mV hwpstate0: <Cool`n'Quiet 2.0> on cpu0 cpu1: <ACPI CPU> on acpi0 cpu2: <ACPI CPU> on acpi0 cpu3: <ACPI CPU> on acpi0 ... ======================================================================== Result of "sysctl dev.cpu.0.freq_levels": ======================================================================== dev.cpu.0.freq_levels: 2700/30940 900/1848 ======================================================================== --- Junichi Satoh <junichi@junichi.org>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20090831.004015.74756379.junichi>