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scsi: ufs: ufs-qcom: Fix sequential read variance

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The current devfreq downdifferential threshold of 5% causes overly
aggressive frequency downscaling, leading to performance degradation
sometimes during sequential read workloads.

Update the UFS devfreq downdifferential threshold to 65.  This widens
the hysteresis window and prevents overly aggressive downscaling,
ensuring that frequency is maintained for loads above 5% and scaling
down occurs only when utilization falls below this level, while scale-up
still triggers above the 70% threshold.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Nitin Rawat <nitin.rawat@oss.qualcomm.com>
Link: https://patch.msgid.link/20260825145203.265579-3-nitin.rawat@oss.qualcomm.com
Signed-off-by: Martin K. Petersen (Oracle) <mkp@kernel.org>
This commit is contained in:
Nitin Rawat 2026-08-25 20:22:03 +05:30 committed by Martin K. Petersen (Oracle)
parent a3756f53ba
commit b2ededcb27
1 changed files with 1 additions and 1 deletions
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2
drivers/ufs/host/ufs-qcom.c
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@ -2291,7 +2291,7 @@ static void ufs_qcom_config_scaling_param(struct ufs_hba *hba,
p->polling_ms = 60;
p->timer = DEVFREQ_TIMER_DELAYED;
d->upthreshold = 70;
d->downdifferential = 5;
d->downdifferential = 65;
hba->clk_scaling.suspend_on_no_request = true;
}