| Message ID | 20211111154808.2024808-4-vladimir.zapolskiy@linaro.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | cpufreq: qcom-hw: a few fixes in qcom cpufreq driver | expand |
On Thu, Nov 11, 2021 at 05:48:08PM +0200, Vladimir Zapolskiy wrote: > 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 <vladimir.zapolskiy@linaro.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index 5d55217caa8b..3967191836fb 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -400,6 +400,11 @@ 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; }
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 <vladimir.zapolskiy@linaro.org> --- drivers/cpufreq/qcom-cpufreq-hw.c | 5 +++++ 1 file changed, 5 insertions(+)