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cputime: Optimize jiffies_to_cputime(1)
For powerpc with CONFIG_VIRT_CPU_ACCOUNTING jiffies_to_cputime(1) is not compile time constant and run time calculations are quite expensive. To optimize we use precomputed value. For all other architectures is is preprocessor definition. Signed-off-by: Stanislaw Gruszka <[email protected]> Acked-by: Peter Zijlstra <[email protected]> Acked-by: Thomas Gleixner <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
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Stanislaw Gruszka
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Ingo Molnar
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Aug 3, 2009
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