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s390/hiperdispatch: Decrease steal time threshold

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Higher steal time thresholds favor low utilization scenarios, which is not
the common case for s390. Set steal time threshold to a lower value to
prioritize vertical high and medium CPUs sooner and allow high utilization
scenarios to benefit from it.

Suggested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Mete Durlu <meted@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Mete Durlu 2025-11-05 12:15:34 +01:00 committed by Heiko Carstens
parent eb3a9b405b
commit 8840cc4520
1 changed files with 1 additions and 1 deletions
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2
arch/s390/kernel/hiperdispatch.c
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@ -65,7 +65,7 @@
#define HD_DELAY_FACTOR (4)
#define HD_DELAY_INTERVAL (HZ / 4)
#define HD_STEAL_THRESHOLD 30
#define HD_STEAL_THRESHOLD 10
#define HD_STEAL_AVG_WEIGHT 16
static cpumask_t hd_vl_coremask; /* Mask containing all vertical low COREs */