[Intel-gfx] [CI 8/8] drm/i915: Expose client engine utilisation via fdinfo
Rob Clark
robdclark at gmail.com
Wed Apr 6 18:15:49 UTC 2022
On Tue, Apr 5, 2022 at 1:09 AM Tvrtko Ursulin
<tvrtko.ursulin at linux.intel.com> wrote:
>
>
> On 04/04/2022 16:36, Daniel Vetter wrote:
> > On Mon, Apr 04, 2022 at 10:23:53AM +0100, Tvrtko Ursulin wrote:
> >>
> >> + Dave and Daniel
> >>
> >> Guys, are you okay with merging this via drm-intel-gt-next? It is one new
> >> file at Documentation/gpu/drm-usage-stats.rst only which is outside i915. It
> >> has acks from Christian and Rob.
> >
> > Acked-by: Daniel Vetter <daniel.vetter at ffwll.ch>
>
> Thanks, pushed now.
>
> Rob - you can proceed with your driver at your leisure. I will re-send
> the rebased gputop to igt-dev shortly and copy you.
Thx, I was planning to respin, but trying to figure out where the
drm-usage-stats.rst patch ended up (since I can't add to a file that
isn't there
BR,
-R
> Regards,
>
> Tvrtko
>
> >>
> >> Daniel, series is also fully reviewed and IGT reviewed and ready. Rob also
> >> demonstrated the approach works for msm when using the vendor agnosstic
> >> gputop tool I sketched out (see
> >> 20220225202614.225197-3-robdclark at gmail.com).
> >>
> >> My plan is to merge the i915 support with the common spec and intel_gpu_top
> >> on the IGT side. Then follow-up with vendor agnostic gputop and later yet
> >> potentially re-visit the AMD side by re-sending the patch which tweaks the
> >> fdinfo format there and adds support for relative engine utilisation as
> >> provided by amdgpu.
> >>
> >> Regards,
> >>
> >> Tvrtko
> >>
> >> On 04/04/2022 10:12, Tvrtko Ursulin wrote:
> >>>
> >>> On 01/04/2022 15:22, Tvrtko Ursulin wrote:
> >>>> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> >>>>
> >>>> Similar to AMD commit
> >>>> 874442541133 ("drm/amdgpu: Add show_fdinfo() interface"), using the
> >>>> infrastructure added in previous patches, we add basic client info
> >>>> and GPU engine utilisation for i915.
> >>>>
> >>>> Example of the output:
> >>>>
> >>>> pos: 0
> >>>> flags: 0100002
> >>>> mnt_id: 21
> >>>> drm-driver: i915
> >>>> drm-pdev: 0000:00:02.0
> >>>> drm-client-id: 7
> >>>> drm-engine-render: 9288864723 ns
> >>>> drm-engine-copy: 2035071108 ns
> >>>> drm-engine-video: 0 ns
> >>>> drm-engine-video-enhance: 0 ns
> >>>>
> >>>> v2:
> >>>> * Update for removal of name and pid.
> >>>>
> >>>> v3:
> >>>> * Use drm_driver.name.
> >>>>
> >>>> v4:
> >>>> * Added drm-engine-capacity- tag.
> >>>> * Fix typo. (Umesh)
> >>>>
> >>>> v5:
> >>>> * Don't output engine data before Gen8.
> >>>>
> >>>> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> >>>> Cc: David M Nieto <David.Nieto at amd.com>
> >>>> Cc: Christian König <christian.koenig at amd.com>
> >>>> Cc: Daniel Vetter <daniel at ffwll.ch>
> >>>> Cc: Chris Healy <cphealy at gmail.com>
> >>>> Acked-by: Christian König <christian.koenig at amd.com>
> >>>> Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa at intel.com>
> >>>
> >>> Forgot to apply an earlier:
> >>>
> >>> Acked-by: Rob Clark <robdclark at gmail.com>
> >>>
> >>> Regards,
> >>>
> >>> Tvrtko
> >>>
> >>>> ---
> >>>> Documentation/gpu/drm-usage-stats.rst | 6 ++
> >>>> Documentation/gpu/i915.rst | 28 +++++++++
> >>>> drivers/gpu/drm/i915/i915_driver.c | 3 +
> >>>> drivers/gpu/drm/i915/i915_drm_client.c | 84 ++++++++++++++++++++++++++
> >>>> drivers/gpu/drm/i915/i915_drm_client.h | 4 ++
> >>>> 5 files changed, 125 insertions(+)
> >>>>
> >>>> diff --git a/Documentation/gpu/drm-usage-stats.rst
> >>>> b/Documentation/gpu/drm-usage-stats.rst
> >>>> index b8cc28f4da6f..6c9f166a8d6f 100644
> >>>> --- a/Documentation/gpu/drm-usage-stats.rst
> >>>> +++ b/Documentation/gpu/drm-usage-stats.rst
> >>>> @@ -104,3 +104,9 @@ object belong to this client, in the respective
> >>>> memory region.
> >>>> Default unit shall be bytes with optional unit specifiers of 'KiB'
> >>>> or 'MiB'
> >>>> indicating kibi- or mebi-bytes.
> >>>> +
> >>>> +===============================
> >>>> +Driver specific implementations
> >>>> +===============================
> >>>> +
> >>>> +:ref:`i915-usage-stats`
> >>>> diff --git a/Documentation/gpu/i915.rst b/Documentation/gpu/i915.rst
> >>>> index 0f08693d05cd..54060cd6c419 100644
> >>>> --- a/Documentation/gpu/i915.rst
> >>>> +++ b/Documentation/gpu/i915.rst
> >>>> @@ -697,3 +697,31 @@ The style guide for ``i915_reg.h``.
> >>>> .. kernel-doc:: drivers/gpu/drm/i915/i915_reg.h
> >>>> :doc: The i915 register macro definition style guide
> >>>> +
> >>>> +.. _i915-usage-stats:
> >>>> +
> >>>> +i915 DRM client usage stats implementation
> >>>> +==========================================
> >>>> +
> >>>> +The drm/i915 driver implements the DRM client usage stats
> >>>> specification as
> >>>> +documented in :ref:`drm-client-usage-stats`.
> >>>> +
> >>>> +Example of the output showing the implemented key value pairs and
> >>>> entirety of
> >>>> +the currently possible format options:
> >>>> +
> >>>> +::
> >>>> +
> >>>> + pos: 0
> >>>> + flags: 0100002
> >>>> + mnt_id: 21
> >>>> + drm-driver: i915
> >>>> + drm-pdev: 0000:00:02.0
> >>>> + drm-client-id: 7
> >>>> + drm-engine-render: 9288864723 ns
> >>>> + drm-engine-copy: 2035071108 ns
> >>>> + drm-engine-video: 0 ns
> >>>> + drm-engine-capacity-video: 2
> >>>> + drm-engine-video-enhance: 0 ns
> >>>> +
> >>>> +Possible `drm-engine-` key names are: `render`, `copy`, `video` and
> >>>> +`video-enhance`.
> >>>> diff --git a/drivers/gpu/drm/i915/i915_driver.c
> >>>> b/drivers/gpu/drm/i915/i915_driver.c
> >>>> index b2df273e6d7b..3ffb617d75c9 100644
> >>>> --- a/drivers/gpu/drm/i915/i915_driver.c
> >>>> +++ b/drivers/gpu/drm/i915/i915_driver.c
> >>>> @@ -1745,6 +1745,9 @@ static const struct file_operations
> >>>> i915_driver_fops = {
> >>>> .read = drm_read,
> >>>> .compat_ioctl = i915_ioc32_compat_ioctl,
> >>>> .llseek = noop_llseek,
> >>>> +#ifdef CONFIG_PROC_FS
> >>>> + .show_fdinfo = i915_drm_client_fdinfo,
> >>>> +#endif
> >>>> };
> >>>> static int
> >>>> diff --git a/drivers/gpu/drm/i915/i915_drm_client.c
> >>>> b/drivers/gpu/drm/i915/i915_drm_client.c
> >>>> index 91a8559bebf7..e539f6b23060 100644
> >>>> --- a/drivers/gpu/drm/i915/i915_drm_client.c
> >>>> +++ b/drivers/gpu/drm/i915/i915_drm_client.c
> >>>> @@ -7,7 +7,13 @@
> >>>> #include <linux/slab.h>
> >>>> #include <linux/types.h>
> >>>> +#include <uapi/drm/i915_drm.h>
> >>>> +
> >>>> +#include <drm/drm_print.h>
> >>>> +
> >>>> +#include "gem/i915_gem_context.h"
> >>>> #include "i915_drm_client.h"
> >>>> +#include "i915_file_private.h"
> >>>> #include "i915_gem.h"
> >>>> #include "i915_utils.h"
> >>>> @@ -68,3 +74,81 @@ void i915_drm_clients_fini(struct
> >>>> i915_drm_clients *clients)
> >>>> GEM_BUG_ON(!xa_empty(&clients->xarray));
> >>>> xa_destroy(&clients->xarray);
> >>>> }
> >>>> +
> >>>> +#ifdef CONFIG_PROC_FS
> >>>> +static const char * const uabi_class_names[] = {
> >>>> + [I915_ENGINE_CLASS_RENDER] = "render",
> >>>> + [I915_ENGINE_CLASS_COPY] = "copy",
> >>>> + [I915_ENGINE_CLASS_VIDEO] = "video",
> >>>> + [I915_ENGINE_CLASS_VIDEO_ENHANCE] = "video-enhance",
> >>>> +};
> >>>> +
> >>>> +static u64 busy_add(struct i915_gem_context *ctx, unsigned int class)
> >>>> +{
> >>>> + struct i915_gem_engines_iter it;
> >>>> + struct intel_context *ce;
> >>>> + u64 total = 0;
> >>>> +
> >>>> + for_each_gem_engine(ce, rcu_dereference(ctx->engines), it) {
> >>>> + if (ce->engine->uabi_class != class)
> >>>> + continue;
> >>>> +
> >>>> + total += intel_context_get_total_runtime_ns(ce);
> >>>> + }
> >>>> +
> >>>> + return total;
> >>>> +}
> >>>> +
> >>>> +static void
> >>>> +show_client_class(struct seq_file *m,
> >>>> + struct i915_drm_client *client,
> >>>> + unsigned int class)
> >>>> +{
> >>>> + const struct list_head *list = &client->ctx_list;
> >>>> + u64 total = atomic64_read(&client->past_runtime[class]);
> >>>> + const unsigned int capacity =
> >>>> + client->clients->i915->engine_uabi_class_count[class];
> >>>> + struct i915_gem_context *ctx;
> >>>> +
> >>>> + rcu_read_lock();
> >>>> + list_for_each_entry_rcu(ctx, list, client_link)
> >>>> + total += busy_add(ctx, class);
> >>>> + rcu_read_unlock();
> >>>> +
> >>>> + seq_printf(m, "drm-engine-%s:\t%llu ns\n",
> >>>> + uabi_class_names[class], total);
> >>>> +
> >>>> + if (capacity > 1)
> >>>> + seq_printf(m, "drm-engine-capacity-%s:\t%u\n",
> >>>> + uabi_class_names[class],
> >>>> + capacity);
> >>>> +}
> >>>> +
> >>>> +void i915_drm_client_fdinfo(struct seq_file *m, struct file *f)
> >>>> +{
> >>>> + struct drm_file *file = f->private_data;
> >>>> + struct drm_i915_file_private *file_priv = file->driver_priv;
> >>>> + struct drm_i915_private *i915 = file_priv->dev_priv;
> >>>> + struct i915_drm_client *client = file_priv->client;
> >>>> + struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
> >>>> + unsigned int i;
> >>>> +
> >>>> + /*
> >>>> + *
> >>>> ******************************************************************
> >>>> + * For text output format description please see
> >>>> drm-usage-stats.rst!
> >>>> + *
> >>>> ******************************************************************
> >>>> + */
> >>>> +
> >>>> + seq_printf(m, "drm-driver:\t%s\n", i915->drm.driver->name);
> >>>> + seq_printf(m, "drm-pdev:\t%04x:%02x:%02x.%d\n",
> >>>> + pci_domain_nr(pdev->bus), pdev->bus->number,
> >>>> + PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
> >>>> + seq_printf(m, "drm-client-id:\t%u\n", client->id);
> >>>> +
> >>>> + if (GRAPHICS_VER(i915) < 8)
> >>>> + return;
> >>>> +
> >>>> + for (i = 0; i < ARRAY_SIZE(uabi_class_names); i++)
> >>>> + show_client_class(m, client, i);
> >>>> +}
> >>>> +#endif
> >>>> diff --git a/drivers/gpu/drm/i915/i915_drm_client.h
> >>>> b/drivers/gpu/drm/i915/i915_drm_client.h
> >>>> index 191368386ace..5f5b02b01ba0 100644
> >>>> --- a/drivers/gpu/drm/i915/i915_drm_client.h
> >>>> +++ b/drivers/gpu/drm/i915/i915_drm_client.h
> >>>> @@ -59,6 +59,10 @@ static inline void i915_drm_client_put(struct
> >>>> i915_drm_client *client)
> >>>> struct i915_drm_client *i915_drm_client_add(struct
> >>>> i915_drm_clients *clients);
> >>>> +#ifdef CONFIG_PROC_FS
> >>>> +void i915_drm_client_fdinfo(struct seq_file *m, struct file *f);
> >>>> +#endif
> >>>> +
> >>>> void i915_drm_clients_fini(struct i915_drm_clients *clients);
> >>>> #endif /* !__I915_DRM_CLIENT_H__ */
> >
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