cpufreq: qcom-hw: Set CPU affinity of dcvsh interrupts

In runtime CPU cluster specific dcvsh interrupts may be handled on unrelated CPU cores, it leads to an issue of too excessive number of received and handled interrupts, but this is not observed, if CPU affinity of the interrupt handler is set in accordance to CPU clusters. The change reduces a number of received interrupts in about 10-100 times. Signed-off-by: Vladimir Zapolskiy <[email protected]> Reviewed-by: Matthias Kaehlcke <[email protected]> Signed-off-by: Viresh Kumar <[email protected]>
steev · Nov 25, 2021 · 3ed6dfb · 3ed6dfb
1 parent e0e27c3
commit 3ed6dfb
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -392,6 +392,11 @@ static int qcom_cpufreq_hw_lmh_init(struct cpufreq_policy *policy, int index)
 		return 0;
 	}
 
+	ret = irq_set_affinity_hint(data->throttle_irq, policy->cpus);
+	if (ret)
+		dev_err(&pdev->dev, "Failed to set CPU affinity of %s[%d]\n",
+			data->irq_name, data->throttle_irq);
+
 	return 0;
 }