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authorMichael Holzheu <holzheu@linux.vnet.ibm.com>2010-10-27 15:34:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-27 18:03:17 -0700
commitd57af9b2142f31a39dcfdeb30776baadfc802827 (patch)
treea89233b1e57b152c9bebf7bb516dd51920602969 /arch/ia64/include/asm/cputime.h
parent3d9e0cf1fe007b88db55d43dfdb6839e1a029ca5 (diff)
taskstats: use real microsecond granularity for CPU times
The taskstats interface uses microsecond granularity for the user and system time values. The conversion from cputime to the taskstats values uses the cputime_to_msecs primitive which effectively limits the granularity to milliseconds. Add the cputime_to_usecs primitive for architectures that have better, more precise CPU time values. Remove cputime_to_msecs primitive because there are no more users left. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Luck Tony <tony.luck@intel.com> Cc: Shailabh Nagar <nagar1234@in.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Shailabh Nagar <nagar@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/ia64/include/asm/cputime.h')
-rw-r--r--arch/ia64/include/asm/cputime.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/ia64/include/asm/cputime.h b/arch/ia64/include/asm/cputime.h
index 7fa8a8594660..6073b187528a 100644
--- a/arch/ia64/include/asm/cputime.h
+++ b/arch/ia64/include/asm/cputime.h
@@ -56,10 +56,10 @@ typedef u64 cputime64_t;
#define jiffies64_to_cputime64(__jif) ((__jif) * (NSEC_PER_SEC / HZ))
/*
- * Convert cputime <-> milliseconds
+ * Convert cputime <-> microseconds
*/
-#define cputime_to_msecs(__ct) ((__ct) / NSEC_PER_MSEC)
-#define msecs_to_cputime(__msecs) ((__msecs) * NSEC_PER_MSEC)
+#define cputime_to_usecs(__ct) ((__ct) / NSEC_PER_USEC)
+#define usecs_to_cputime(__usecs) ((__usecs) * NSEC_PER_USEC)
/*
* Convert cputime <-> seconds