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| author | Mete Durlu <meted@linux.ibm.com> | 2024-08-12 13:39:33 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2024-08-29 22:56:35 +0200 |
| commit | 26ceef523d5442a8bc88e334c3e84cdbd9e3fb92 (patch) | |
| tree | 9f46208cd12eb617899646c3e8aa79577f47c2a3 /arch/s390/include/asm/processor.h | |
| parent | 7e627f819302b8c22098b0575c35a3349c4e306f (diff) | |
| download | lwn-26ceef523d5442a8bc88e334c3e84cdbd9e3fb92.tar.gz lwn-26ceef523d5442a8bc88e334c3e84cdbd9e3fb92.zip | |
s390/smp: Add cpu capacities
Linux scheduler allows architectures to assign capacity values to
individual CPUs. This hints scheduler the performance difference between
CPUs and allows more efficient task distribution them. Implement
helper methods to set and get CPU capacities for s390. This is
particularly helpful in vertical polarization configurations of LPARs.
On vertical polarization an LPARs CPUs can get different polarization
values depending on the CEC configuration. CPUs with different
polarization values can perform different from each other, using CPU
capacities this can be reflected to linux scheduler.
Acked-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Mete Durlu <meted@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/processor.h')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 5ecd442535b9..9a5236acc0a8 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -44,6 +44,7 @@ struct pcpu { unsigned long ec_mask; /* bit mask for ec_xxx functions */ unsigned long ec_clk; /* sigp timestamp for ec_xxx */ unsigned long flags; /* per CPU flags */ + unsigned long capacity; /* cpu capacity for scheduler */ signed char state; /* physical cpu state */ signed char polarization; /* physical polarization */ u16 address; /* physical cpu address */ |