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| author | Michael Neuling <mikey@neuling.org> | 2008-02-06 01:36:12 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-06 10:41:00 -0800 |
| commit | 06b8e878a9bc9301201cffe186eba99c4185f20a (patch) | |
| tree | 857434ed559cdb001177e81283be6f0b5693a781 /include/asm-generic | |
| parent | d9afa43532adf8a31b93c4c7601fda3f423d8972 (diff) | |
| download | lwn-06b8e878a9bc9301201cffe186eba99c4185f20a.tar.gz lwn-06b8e878a9bc9301201cffe186eba99c4185f20a.zip | |
taskstats scaled time cleanup
This moves the ability to scale cputime into generic code. This allows us
to fix the issue in kernel/timer.c (noticed by Balbir) where we could only
add an unscaled value to the scaled utime/stime.
This adds a cputime_to_scaled function. As before, the POWERPC version
does the scaling based on the last SPURR/PURR ratio calculated. The
generic and s390 (only other arch to implement asm/cputime.h) versions are
both NOPs.
Also moves the SPURR and PURR snapshots closer.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: Jay Lan <jlan@engr.sgi.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/cputime.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-generic/cputime.h b/include/asm-generic/cputime.h index 09204e40d663..1c1fa422d18a 100644 --- a/include/asm-generic/cputime.h +++ b/include/asm-generic/cputime.h @@ -18,6 +18,7 @@ typedef unsigned long cputime_t; #define cputime_lt(__a, __b) ((__a) < (__b)) #define cputime_le(__a, __b) ((__a) <= (__b)) #define cputime_to_jiffies(__ct) (__ct) +#define cputime_to_scaled(__ct) (__ct) #define jiffies_to_cputime(__hz) (__hz) typedef u64 cputime64_t; |