Comment 412 for bug 620074

Notebooks toshiba earlier came across to me, and I saw as on them then worked Linux. If ACPI to switch off — it was possible to listen to music (but, and it is clear, not to see how many remains fuel in batteries) and if ACPI to switch on — any sound was not, whether but it was visible that with a battery began and to understand have stolen this battery while we enjoyed music. It is possible and to accuse of it the scheduler (in our case cfq) and to search why it cannot plan simultaneously two processes — to play music and to check a battery state.
For us it has turned out that all schedulers have broken (because I have tried them all — and all non-working). The theory of probability does not deny possibility of such event. But, that, for one person all schedulers broke, and all worked for another are already influence supernatural forces. Struggle against them is useless.
So why for one all works, and for another the system hardly creeps. In what a difference. Only in computers (or is more exact in their complete set).

I can be mistaken, but can then someone will tell why on one iron all simply flies, and on other hardly creeps (without looking at that on the second both the processor faster and disks faster, and bus faster).