Mathieu Desnoyers writes: > Sorry for self-reply, but I thought, in the past, of a way to make this > possible. > > It would imply the creation of a new vsyscall : vgetschedperiod > > It would read a counter that would increment each time the thread is > scheduled out (or in). It would be a per thread counter
It's very hard to do a per-thread counter in the VDSO, since threads in the same process see the same memory, by definition. You'd have to have an array of counters and have some way for each thread to know which entry to read. Also you'd have to find space for tens or hundreds of thousands of counters, since there can be that many threads in a process sometimes. Paul. -- 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/
