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apm -A vs apm -C
Hi
I use OpenBSD 5.4 on my desktop and I'd like apmd to adjust the CPU speed automatically. I added these lines to /etc/rc.conf.local : Code:
$ tail -2 /etc/rc.conf.local apmd_flags="-C" # Start apmd in cool running performance adjustment mode #apmd_flags="-A" # Set apmd(8) to automatic performance adjustment mode. Code:
-A Set apmd(8) to automatic performance adjustment mode. In this mode, when CPU idle time falls below 10%, or if the AC power is connected and the battery is more than 15% charged, apm raises hw.setperf to 100. Otherwise when CPU idle time is above 30% and the system is running on battery power, apm lowers hw.setperf as much as possible to reduce power consumption. -a Display the external charger (A/C status). 0 means disconnected, 1 means connected, 2 means backup power source, and 255 means unknown. -b Display the battery status. 0 means high, 1 means low, 2 means critical, 3 means charging, 4 means absent, and 255 means unknown. -C Set apmd(8) to cool running performance adjustment mode. In this mode, when CPU idle time falls below 10%, apm raises hw.setperf as much as necessary. Otherwise when CPU idle time is above 30%, apm lowers hw.setperf as much as possible to reduce heat, noise, and power consumption. If I use the cool mode, CPU scaling works, but is not triggered fast enough making the computer sluggish Below some additionnal information : Code:
$ apm -a 255 $ apm -b 4 $ apm -bv Battery state: absent $ apm -av A/C adapter state: not known $ dmesg|grep -i athlon cpu0: AMD Athlon(tm) II X3 455 Processor, 3315.01 MHz cpu1: AMD Athlon(tm) II X3 455 Processor, 3314.68 MHz cpu2: AMD Athlon(tm) II X3 455 Processor, 3314.68 MHz $ dmesg|grep speeds cpu0: 3315 MHz: speeds: 3300 2600 2100 800 MHz $ sysctl|grep cpu kern.ccpu=1948 hw.ncpu=3 hw.cpuspeed=3300 hw.ncpufound=3 machdep.cpuvendor=AuthenticAMD machdep.cpuid=1052499 machdep.cpufeature=396098559 $ sysctl|grep volt hw.sensors.it0.volt0=0.99 VDC (VCORE_A) hw.sensors.it0.volt1=1.49 VDC (VCORE_B) hw.sensors.it0.volt2=3.34 VDC (+3.3V) hw.sensors.it0.volt3=4.97 VDC (+5V) hw.sensors.it0.volt4=12.48 VDC (+12V) hw.sensors.it0.volt5=-7.69 VDC (-12V) hw.sensors.it0.volt6=4.05 VDC (-5V) hw.sensors.it0.volt7=3.60 VDC (+5VSB) hw.sensors.it0.volt8=3.31 VDC (VBAT) $ tail /var/log/daemon apmd: battery status: absent. external power status: not known. estimated battery life 0% apmd: setting hw.setperf automatically Thanks |
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