Hi, I've been using the ondemand governor on athlon64 winchesters for a few weeks. I've just noticed that in 2.6.12 the frequency is not increasing under load, it remains at the lowest frequency. This seems to be down to something in 2.6.12-rc6, but I've seen at least one report since then that ondemand works fine. Anybody else seeing this problem ?
Testcase: boot (my bootscripts set the governor to ondemand), set the governor to ondemand, performance, powersave and untar a nice big bzip2'd tarball (gcc-3.4.1) from an nfs mount. All using the config from 2.6.11.9 and defaults for new options. kernel 2.6.11.9 2.6.12-rc5 2.6.12-rc6 2.6.12 ondemand 20.8 sec 21.3 sec 33.9 sec 34.1 sec performance 21.3 sec 22.0 sec 22.6 sec 20.1 sec powersave 32.4 sec 33.1 sec 33.6 sec 33.9 sec I don't have confidence that the numbers are more repeatable than +/- 2 seconds on this, they just illustrate that ondemand used to give a similar time to performance, but now doesn't. Other intermediate and later tests have been omitted for clarity, but 2.6.12.2 does show the same problem. Since 2.6.12-rc6, 'ondemand' appears to be still accepted (the echo to scaling_governor returns 0, and the displayed frequency drops back if I try going from performance to ondemand). When ondemand appears to work properly, /proc/cpuinfo shows the speed jumping to 2 GHz, then falling back to 1.8 after the untar ends, then back to 1.0 GHz. In the problem cases, the speed remains at 1GHz. As far as I can see, nothing untoward shows in the logs. Any suggestions, please ? Ken -- das eine Mal als Tragödie, das andere Mal als Farce - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
