Re: [PATCH v2] drm/lima: add governor data with pre-defined thresholds
Applied to drm-misc-next. Regards, Qiang On Tue, Feb 2, 2021 at 9:04 AM Qiang Yu wrote: > > OK, I see. Patch is also: > Reviewed-by: Qiang Yu > > Regards, > Qiang > > On Mon, Feb 1, 2021 at 5:59 PM Lukasz Luba wrote: > > > > > > > > On 1/30/21 1:57 PM, Qiang Yu wrote: > > > This patch gets minor improvement on glmark2 (160->162). > > > > It has bigger impact when the load is changing and the frequency > > is stuck to min w/o this patch. > > > > > > > > Seems there's no way for user to change this value, do we? > > > Or there's work pending to expose it to sysfs? > > > > True there is no user sysfs. I've proposed a patch to export these via > > sysfs. Chanwoo is going to work on it. When it will land mainline, it's > > probably a few months. So for now, the fix makes sense. > > > > Regards, > > Lukasz > > ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
Re: [PATCH v2] drm/lima: add governor data with pre-defined thresholds
On 1/30/21 1:57 PM, Qiang Yu wrote: This patch gets minor improvement on glmark2 (160->162). It has bigger impact when the load is changing and the frequency is stuck to min w/o this patch. Seems there's no way for user to change this value, do we? Or there's work pending to expose it to sysfs? True there is no user sysfs. I've proposed a patch to export these via sysfs. Chanwoo is going to work on it. When it will land mainline, it's probably a few months. So for now, the fix makes sense. Regards, Lukasz ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
Re: [PATCH v2] drm/lima: add governor data with pre-defined thresholds
OK, I see. Patch is also: Reviewed-by: Qiang Yu Regards, Qiang On Mon, Feb 1, 2021 at 5:59 PM Lukasz Luba wrote: > > > > On 1/30/21 1:57 PM, Qiang Yu wrote: > > This patch gets minor improvement on glmark2 (160->162). > > It has bigger impact when the load is changing and the frequency > is stuck to min w/o this patch. > > > > > Seems there's no way for user to change this value, do we? > > Or there's work pending to expose it to sysfs? > > True there is no user sysfs. I've proposed a patch to export these via > sysfs. Chanwoo is going to work on it. When it will land mainline, it's > probably a few months. So for now, the fix makes sense. > > Regards, > Lukasz > ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
Re: [PATCH v2] drm/lima: add governor data with pre-defined thresholds
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
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.l...@arm.com/
>
> Signed-off-by: Christian Hewitt
> ---
> 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.l...@arm.com/
>
> 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, _devfreq_profile,
> - DEVFREQ_GOV_SIMPLE_ONDEMAND, NULL);
> + DEVFREQ_GOV_SIMPLE_ONDEMAND,
> + >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
> #include
> #include
>
> @@ -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
>
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Re: [PATCH v2] drm/lima: add governor data with pre-defined thresholds
On 1/27/21 7:40 PM, Christian Hewitt 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.l...@arm.com/
Signed-off-by: Christian Hewitt
---
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.l...@arm.com/
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, _devfreq_profile,
- DEVFREQ_GOV_SIMPLE_ONDEMAND, NULL);
+ DEVFREQ_GOV_SIMPLE_ONDEMAND,
+ >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
#include
#include
@@ -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;
It looks good.
Reviewed-by: Lukasz Luba
Regards,
Lukasz
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[PATCH v2] drm/lima: add governor data with pre-defined thresholds
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.l...@arm.com/
Signed-off-by: Christian Hewitt
---
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.l...@arm.com/
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, _devfreq_profile,
- DEVFREQ_GOV_SIMPLE_ONDEMAND, NULL);
+ DEVFREQ_GOV_SIMPLE_ONDEMAND,
+ >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
#include
#include
@@ -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
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