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Message-Id: <20230712114605.519432-14-tvrtko.ursulin@linux.intel.com>
Date: Wed, 12 Jul 2023 12:46:01 +0100
From: Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>
To: Intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Cc: cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
Tejun Heo <tj@...nel.org>,
Johannes Weiner <hannes@...xchg.org>,
Zefan Li <lizefan.x@...edance.com>,
Dave Airlie <airlied@...hat.com>,
Daniel Vetter <daniel.vetter@...ll.ch>,
Rob Clark <robdclark@...omium.org>,
Stéphane Marchesin <marcheu@...omium.org>,
"T . J . Mercier" <tjmercier@...gle.com>, Kenny.Ho@....com,
Christian König <christian.koenig@....com>,
Brian Welty <brian.welty@...el.com>,
Tvrtko Ursulin <tvrtko.ursulin@...el.com>
Subject: [PATCH 13/17] drm/i915: Wire up with drm controller GPU time query
From: Tvrtko Ursulin <tvrtko.ursulin@...el.com>
Implement the drm_cgroup_ops->active_time_us callback.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@...el.com>
---
drivers/gpu/drm/i915/i915_driver.c | 8 ++
drivers/gpu/drm/i915/i915_drm_client.c | 116 ++++++++++++++++++-------
drivers/gpu/drm/i915/i915_drm_client.h | 2 +
3 files changed, 94 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
index 294b022de22b..62a544d17659 100644
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -1791,6 +1791,12 @@ static const struct drm_ioctl_desc i915_ioctls[] = {
DRM_IOCTL_DEF_DRV(I915_GEM_VM_DESTROY, i915_gem_vm_destroy_ioctl, DRM_RENDER_ALLOW),
};
+#ifdef CONFIG_CGROUP_DRM
+static const struct drm_cgroup_ops i915_drm_cgroup_ops = {
+ .active_time_us = i915_drm_cgroup_get_active_time_us,
+};
+#endif
+
/*
* Interface history:
*
@@ -1820,6 +1826,8 @@ static const struct drm_driver i915_drm_driver = {
.postclose = i915_driver_postclose,
.show_fdinfo = PTR_IF(IS_ENABLED(CONFIG_PROC_FS), i915_drm_client_fdinfo),
+ .cg_ops = PTR_IF(IS_ENABLED(CONFIG_CGROUP_DRM), &i915_drm_cgroup_ops),
+
.gem_prime_import = i915_gem_prime_import,
.dumb_create = i915_gem_dumb_create,
diff --git a/drivers/gpu/drm/i915/i915_drm_client.c b/drivers/gpu/drm/i915/i915_drm_client.c
index 9e7a6075ee25..c3298beb094a 100644
--- a/drivers/gpu/drm/i915/i915_drm_client.c
+++ b/drivers/gpu/drm/i915/i915_drm_client.c
@@ -44,6 +44,86 @@ void __i915_drm_client_free(struct kref *kref)
kfree(client);
}
+#if defined(CONFIG_PROC_FS) || defined(CONFIG_CGROUP_DRM)
+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",
+ [I915_ENGINE_CLASS_COMPUTE] = "compute",
+};
+
+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 u64 get_class_active_ns(struct i915_drm_client *client,
+ struct drm_i915_private *i915,
+ unsigned int class,
+ unsigned int *capacity)
+{
+ struct i915_gem_context *ctx;
+ u64 total;
+
+ *capacity = i915->engine_uabi_class_count[class];
+ if (!*capacity)
+ return 0;
+
+ total = atomic64_read(&client->past_runtime[class]);
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(ctx, &client->ctx_list, client_link)
+ total += busy_add(ctx, class);
+ rcu_read_unlock();
+
+ return total;
+}
+
+static bool supports_stats(struct drm_i915_private *i915)
+{
+ return GRAPHICS_VER(i915) >= 8;
+}
+#endif
+
+#if defined(CONFIG_CGROUP_DRM)
+u64 i915_drm_cgroup_get_active_time_us(struct drm_file *file)
+{
+ struct drm_i915_file_private *fpriv = file->driver_priv;
+ struct i915_drm_client *client = fpriv->client;
+ struct drm_i915_private *i915 = fpriv->i915;
+ unsigned int i;
+ u64 busy = 0;
+
+ if (!supports_stats(i915))
+ return 0;
+
+ for (i = 0; i < ARRAY_SIZE(uabi_class_names); i++) {
+ unsigned int capacity;
+ u64 b;
+
+ b = get_class_active_ns(client, i915, i, &capacity);
+ if (capacity) {
+ b = DIV_ROUND_UP_ULL(b, capacity * 1000);
+ busy += b;
+ }
+ }
+
+ return busy;
+}
+#endif
+
#ifdef CONFIG_PROC_FS
static void
obj_meminfo(struct drm_i915_gem_object *obj,
@@ -128,44 +208,16 @@ static void show_meminfo(struct drm_printer *p, struct drm_file *file)
mr->name);
}
-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",
- [I915_ENGINE_CLASS_COMPUTE] = "compute",
-};
-
-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 drm_printer *p,
struct drm_i915_private *i915,
struct i915_drm_client *client,
unsigned int class)
{
- const unsigned int capacity = i915->engine_uabi_class_count[class];
- u64 total = atomic64_read(&client->past_runtime[class]);
- struct i915_gem_context *ctx;
+ unsigned int capacity;
+ u64 total;
- rcu_read_lock();
- list_for_each_entry_rcu(ctx, &client->ctx_list, client_link)
- total += busy_add(ctx, class);
- rcu_read_unlock();
+ total = get_class_active_ns(client, i915, class, &capacity);
if (capacity)
drm_printf(p, "drm-engine-%s:\t%llu ns\n",
@@ -191,7 +243,7 @@ void i915_drm_client_fdinfo(struct drm_printer *p, struct drm_file *file)
show_meminfo(p, file);
- if (GRAPHICS_VER(i915) < 8)
+ if (!supports_stats(i915))
return;
for (i = 0; i < ARRAY_SIZE(uabi_class_names); i++)
diff --git a/drivers/gpu/drm/i915/i915_drm_client.h b/drivers/gpu/drm/i915/i915_drm_client.h
index 69cedfcd3d69..e0b143890e69 100644
--- a/drivers/gpu/drm/i915/i915_drm_client.h
+++ b/drivers/gpu/drm/i915/i915_drm_client.h
@@ -90,4 +90,6 @@ i915_drm_client_add_context_objects(struct i915_drm_client *client,
}
#endif
+u64 i915_drm_cgroup_get_active_time_us(struct drm_file *file);
+
#endif /* !__I915_DRM_CLIENT_H__ */
--
2.39.2
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