This patch gets minor improvement on glmark2 (160->162). Seems there's no way for user to change this value, do we? Or there's work pending to expose it to sysfs? Regards, Qiang On Thu, Jan 28, 2021 at 3:40 AM Christian Hewitt <christianshewitt@xxxxxxxxx> wrote: > > This patch adapts the panfrost pre-defined thresholds change [0] to the > lima driver to improve real-world performance. The upthreshold value has > been set to ramp GPU frequency to max freq faster (compared to panfrost) > to compensate for the lower overall performance of utgard devices. > > [0] https://patchwork.kernel.org/project/dri-devel/patch/20210121170445.19761-1-lukasz.luba@xxxxxxx/ > > Signed-off-by: Christian Hewitt <christianshewitt@xxxxxxxxx> > --- > Change since v1: increased upthreshold from 20 to 30, with a soft > dependency on Lukasz delayed timer patch [0] > > [0] https://lore.kernel.org/lkml/20210127105121.20345-1-lukasz.luba@xxxxxxx/ > > drivers/gpu/drm/lima/lima_devfreq.c | 10 +++++++++- > drivers/gpu/drm/lima/lima_devfreq.h | 2 ++ > 2 files changed, 11 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/lima/lima_devfreq.c b/drivers/gpu/drm/lima/lima_devfreq.c > index 5686ad4aaf7c..c9854315a0b5 100644 > --- a/drivers/gpu/drm/lima/lima_devfreq.c > +++ b/drivers/gpu/drm/lima/lima_devfreq.c > @@ -163,8 +163,16 @@ int lima_devfreq_init(struct lima_device *ldev) > lima_devfreq_profile.initial_freq = cur_freq; > dev_pm_opp_put(opp); > > + /* > + * Setup default thresholds for the simple_ondemand governor. > + * The values are chosen based on experiments. > + */ > + ldevfreq->gov_data.upthreshold = 30; > + ldevfreq->gov_data.downdifferential = 5; > + > devfreq = devm_devfreq_add_device(dev, &lima_devfreq_profile, > - DEVFREQ_GOV_SIMPLE_ONDEMAND, NULL); > + DEVFREQ_GOV_SIMPLE_ONDEMAND, > + &ldevfreq->gov_data); > if (IS_ERR(devfreq)) { > dev_err(dev, "Couldn't initialize GPU devfreq\n"); > ret = PTR_ERR(devfreq); > diff --git a/drivers/gpu/drm/lima/lima_devfreq.h b/drivers/gpu/drm/lima/lima_devfreq.h > index 2d9b3008ce77..b0c7c736e81a 100644 > --- a/drivers/gpu/drm/lima/lima_devfreq.h > +++ b/drivers/gpu/drm/lima/lima_devfreq.h > @@ -4,6 +4,7 @@ > #ifndef __LIMA_DEVFREQ_H__ > #define __LIMA_DEVFREQ_H__ > > +#include <linux/devfreq.h> > #include <linux/spinlock.h> > #include <linux/ktime.h> > > @@ -18,6 +19,7 @@ struct lima_devfreq { > struct opp_table *clkname_opp_table; > struct opp_table *regulators_opp_table; > struct thermal_cooling_device *cooling; > + struct devfreq_simple_ondemand_data gov_data; > > ktime_t busy_time; > ktime_t idle_time; > -- > 2.17.1 > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
