| Message ID | 20230716074907.12356-1-quic_nitirawa@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | [V2] scsi: ufs: ufs-qcom: Update UFS devfreq Parameters | expand |
On Sun, Jul 16, 2023 at 01:19:07PM +0530, Nitin Rawat wrote: > To support the periodic polling mode without stop caused by CPU idle > state, enable delayed timer as default instead of deferrable timer > for qualcomm platforms. How about, "Devfreq uses the default DEVFREQ_TIMER_DEFERRABLE mode which uses the deferred timer for scheduling the devfreq load monitor function. This causes the load monitoring to be done only with non-idle CPUs and not making use of the idle CPUs. Hence, use the DEVFREQ_TIMER_DELAYED mode which uses the delayed timer thereby making use of idle CPUs as well for load monitoring." > And change UFS devfreq downdifferential threshold to 65 for less > aggressive downscaling. > This change needs to be done in a separate patch. Also please provide any benchmark if available to justify the patch. > Signed-off-by: Nitin Rawat <quic_nitirawa@quicinc.com> > Signed-off-by: Asutosh Das <quic_asutoshd@quicinc.com> Your signed-off-by should come last, as you are the one sending this patch. - Mani > --- > > Changes in v2: > - Realigned the commit text > > drivers/ufs/host/ufs-qcom.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c > index 82d02e7f3b4f..a15815c951ca 100644 > --- a/drivers/ufs/host/ufs-qcom.c > +++ b/drivers/ufs/host/ufs-qcom.c > @@ -1388,8 +1388,9 @@ static void ufs_qcom_config_scaling_param(struct ufs_hba *hba, > struct devfreq_simple_ondemand_data *d) > { > p->polling_ms = 60; > + p->timer = DEVFREQ_TIMER_DELAYED; > d->upthreshold = 70; > - d->downdifferential = 5; > + d->downdifferential = 65; > } > #else > static void ufs_qcom_config_scaling_param(struct ufs_hba *hba, > -- > 2.17.1 >
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 82d02e7f3b4f..a15815c951ca 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -1388,8 +1388,9 @@ static void ufs_qcom_config_scaling_param(struct ufs_hba *hba, struct devfreq_simple_ondemand_data *d) { p->polling_ms = 60; + p->timer = DEVFREQ_TIMER_DELAYED; d->upthreshold = 70; - d->downdifferential = 5; + d->downdifferential = 65; } #else static void ufs_qcom_config_scaling_param(struct ufs_hba *hba,