Klistvud <quotati...@aliceadsl.fr> writes: > Howdie, fellow Debianites! > > I've bee all over uncle G to crack this one, but to no avail. In short: > how would you go about launching a program when the computer is idle, > and launching another program when the computer stops being idle? > Specifically, I'd like my computer to switch CPU governors from > powersave to performance and vice versa, with "cpufreq-set --governor > foobar". -- snip -- > Are there other -- preferably easier -- approaches to this? As you may > see, I'm not being picky as to how "idle" is defined: it may be no X > usage, it may be low average load, it may be no user activity, you > choose. > > Why I need this: my Pentium IV uses the p4_clockmod cpu scaling module, > which has a high latency. Using the (recommended) ondemand CPU governor > yields a very noticeable lag and leaves the CPU at low clocks even when > maximum performance is required. With the performance CPU governor, on > the other hand, the things feel real snappy again, but the fans start > to roar and heat to build up, so I'd really like it to switch to > powersave when not in use.
Do you know what your actual latency is? When you have the ondemand governor selected, you can check by 'cat /sys/devices/system/cpu/cpu0/cpufreq/ondemand/sampling_rate' to get the latency in microseconds. You can write to that any value between 'sampling_rate_min' and 'sampling_rate_max' (in the same directory). I suspect any manual selection you figure out will be slower than that. On my Athlon II computer the default latency is 80000 (80msec) which is faster than I really need, so I actually slow it down a little. If you have multiple cpus or cores then you will need to change all of them. -- Carl Johnson ca...@peak.org -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/87ocftpf72....@cjlinux.localnet
