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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2009-02-19 15:19:00 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-02-19 15:19:19 +0100 |
| commit | d5cd0343d2878b66e25e044f644563c6bf708833 (patch) | |
| tree | f5ac4a6f0fe9e37c46d718df0f365b77883184bb /arch | |
| parent | [S390] sclp: handle empty event buffers (diff) | |
| download | linux-d5cd0343d2878b66e25e044f644563c6bf708833.tar.xz linux-d5cd0343d2878b66e25e044f644563c6bf708833.zip | |
[S390] Fix timeval regression on s390
commit aa5e97ce4bbc9d5daeec16b1d15bb3f6b7b4f4d4
[PATCH] improve precision of process accounting.
Introduced a timing regression:
-bash-3.2# time ls
real 0m0.006s
user 0m1.754s
sys 0m1.094s
The problem was introduced by an error in cputime_to_timeval.
Cputime is now 1/4096 microsecond, therefore, we have to divide
the remainder with 4096 to get the microseconds.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/include/asm/cputime.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h index 521726430afa..95b0f7db3c69 100644 --- a/arch/s390/include/asm/cputime.h +++ b/arch/s390/include/asm/cputime.h @@ -145,7 +145,7 @@ cputime_to_timeval(const cputime_t cputime, struct timeval *value) value->tv_usec = rp.subreg.even / 4096; value->tv_sec = rp.subreg.odd; #else - value->tv_usec = cputime % 4096000000ULL; + value->tv_usec = (cputime % 4096000000ULL) / 4096; value->tv_sec = cputime / 4096000000ULL; #endif } |