cpufreq on TiBook 400 MHz
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Hi Ben
Am Sonntag, 15. Juni 2003 15:52 schrieb Benjamin Herrenschmidt:
Quoted 5 lines · Krisztian Mark Szentes
Quoted 4 lines · Segher Boessenkool
Quoted 3 lines
Quoted 2 lines · Krisztian Mark Szentes
I wonder why there is no
/proc/cpufreqon my Titanium PowerBook G4 (400 MHz).
Quoted 7 lines
Quoted 7 lines
Quoted 1 line
Because no-one filled in the right values yet.
...
Quoted 4 lines
I seem to remember the PowerBook3,2 @ 400 has a low speed of 300MHz, but I'm not fully sure about that -- better check it yourself (apple.com -> developer -> hardware -> all products or something like that, it's not too hard to find).
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says:
"On the PowerBook G4 computer, the slower clock speed is 100 MHz slower than the rated speed: 300 MHz on a 400-MHz model, 400 MHz on a 500 MHz model."Now, that's strange. I remember we measured 300Mhz for the low speed of the 500Mhz model...
Am Freitag, 23. Mai 2003 11:19 schrieben Sie:
Quoted 2 lines
I'm not sure that will work. On the other hand, I'm pretty sure the freq. switching is _NOT_ supported on this model...
finally I edited the sources (a version of 2.4.20 lying around here):
..
#define DEBUG_FREQ
..
/* Else check for TiPb 500 */
else if (machine_is_compatible("PowerBook3,2")) { /* Mark:and 400 MHz */
if (cur_freq < 350000 || cur_freq > 550000) goto out;
hi_freq = cur_freq;
low_freq = 300000;
has_freq_ctl = 1;
cpufreq_uses_pmu = 1;
recompiled and fired it up:
# cat /proc/cpuinfo cpu : 7410, altivec supported temperature : 17-21 C (uncalibrated) clock : 400MHz revision : 17.3 (pvr 800c 1103) bogomips : 797.90 machine : PowerBook3,2 motherboard : PowerBook3,2 MacRISC2 MacRISC Power Macintosh detected as : 71 (PowerBook Titanium) pmac flags : 0000000b L2 cache : 1024K unified memory : 512MB pmac-generation : NewWorld # cat /proc/sys/cpu/0/speed-min > /proc/sys/cpu/0/speed # cat /proc/cpuinfo cpu : 7410, altivec supported temperature : 17-21 C (uncalibrated) clock : 300MHz revision : 17.3 (pvr 800c 1103) bogomips : 598.42 machine : PowerBook3,2 motherboard : PowerBook3,2 MacRISC2 MacRISC Power Macintosh detected as : 71 (PowerBook Titanium) pmac flags : 0000000b L2 cache : 1024K unified memory : 512MB pmac-generation : NewWorld # dmesg | tail -3 HID1, before: a0000000 HID1, after: 80000000 Calibrating delay loop... 598.01 BogoMIPS # cat /proc/sys/cpu/0/speed-max > /proc/sys/cpu/0/speed # cat /proc/cpuinfo cpu : 7410, altivec supported temperature : 18-22 C (uncalibrated) clock : 400MHz revision : 17.3 (pvr 800c 1103) bogomips : 797.90 machine : PowerBook3,2 motherboard : PowerBook3,2 MacRISC2 MacRISC Power Macintosh detected as : 71 (PowerBook Titanium) pmac flags : 0000000b L2 cache : 1024K unified memory : 512MB pmac-generation : NewWorld # dmesg | tail -3 HID1, before: 80000000 HID1, after: a0000000 Calibrating delay loop... 797.90 BogoMIPS
BTW, the power consumption as displayed by xpmumon changes only by approx. 0,5 Watt. I also do not understand why the bogomips numbers are not exactly the same (598.01 versus 598.42).
Has it convinced you to include the Titanium 400 MHz into the future cpufreq supported models?
Thank you for your work!
Salut
Mark
Quoted 3 lines
Has it convinced you to include the Titanium 400 MHz into the future cpufreq supported models?
Your numbers look good. Send me a patch :)
Ben.