diff options
| author | Mete Durlu <meted@linux.ibm.com> | 2024-08-12 13:39:37 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2024-08-29 22:56:35 +0200 |
| commit | b9271a533433dd4049723d4668418709e1927e12 (patch) | |
| tree | 4660459f8943dccb96a61b5055b6b93fe1c5a3ff /arch/s390/Kconfig | |
| parent | 1e5aa12d470b1af613fca89a3069529fa9c92cfb (diff) | |
s390/hiperdispatch: Add hiperdispatch sysctl interface
Expose hiperdispatch controls via sysctl. The user can now toggle
hiperdispatch via assigning 0 or 1 to s390.hiperdispatch attribute.
When hiperdipatch is toggled on, it tries to adjust CPU capacities,
while system is in vertical polarization to gain performance benefits
from different CPU polarizations. Disabling hiperdispatch reverts the
CPU capacities to their default (HIGH_CAPACITY) and stops the dynamic
adjustments.
Introduce a kconfig option HIPERDISPATCH_ON which allows users to
use hiperdispatch by default on vertical polarization. Using the
sysctl attribute s390.hiperdispatch would overwrite this behavior.
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/Kconfig')
| -rw-r--r-- | arch/s390/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 2ee634bab222..bc2aab60c1c8 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -521,6 +521,18 @@ config SCHED_TOPOLOGY_VERTICAL Use vertical CPU polarization by default if available. The default CPU polarization is horizontal. +config HIPERDISPATCH_ON + def_bool y + bool "Use hiperdispatch on vertical polarization by default" + depends on SCHED_TOPOLOGY + depends on PROC_SYSCTL + help + Hiperdispatch aims to improve the CPU scheduler's decision + making when using vertical polarization by adjusting CPU + capacities dynamically. Set this option to use hiperdispatch + on vertical polarization by default. This can be overwritten + by sysctl's s390.hiperdispatch attribute later on. + source "kernel/Kconfig.hz" config CERT_STORE |