• Frederic Weisbecker's avatar
    cputime: Librarize per nsecs resolution cputime definitions · 39613766
    Frederic Weisbecker authored
    The full dynticks cputime accounting that we'll soon introduce
    will rely on sched_clock(). And its clock can have a per
    nanosecond granularity.
    To prepare for this, we need to have a cputime_t implementation
    that has this precision.
    ia64 virtual cputime accounting already uses that granularity
    so all we need is to librarize its implementation in the asm
    generic headers.
    Also librarize the default per jiffy granularity cputime_t
    as well so that we can easily pick either implementation
    depending on the cputime accounting config we choose.
    Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Li Zhong <zhong@linux.vnet.ibm.com>
    Cc: Namhyung Kim <namhyung.kim@lge.com>
    Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
    Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Tony Luck <tony.luck@intel.com>
    Cc: Fenghua Yu <fenghua.yu@intel.com>
cputime.h 164 Bytes