On 22/01/2021 12:28, Chris Wilson wrote:
Since we already report the per-engine runtime via PMU (using sampling
if a direct measure is not available), and in debugfs, also trivially
include the information for each engine under sysfs as a read-only
property. We only present the total milliseconds to hide any misleading
accuracy and to purposely reduce the precision of the global
unprivileged information.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/sysfs_engines.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/sysfs_engines.c b/drivers/gpu/drm/i915/gt/sysfs_engines.c
index 967031056202..57ef5383dd4e 100644
--- a/drivers/gpu/drm/i915/gt/sysfs_engines.c
+++ b/drivers/gpu/drm/i915/gt/sysfs_engines.c
@@ -411,6 +411,19 @@ heartbeat_default(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
static struct kobj_attribute heartbeat_interval_def =
__ATTR(heartbeat_interval_ms, 0444, heartbeat_default, NULL);
+static ssize_t
+runtime_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
+{
+ struct intel_engine_cs *engine = kobj_to_engine(kobj);
+ ktime_t dummy;
+
+ return sprintf(buf, "%llu\n",
+ ktime_to_ms(intel_engine_get_busy_time(engine, &dummy)));
+}
+
+static struct kobj_attribute runtime_attr =
+__ATTR(runtime_ms, 0444, runtime_show, NULL);
+
static void kobj_engine_release(struct kobject *kobj)
{
kfree(kobj);
@@ -521,6 +534,10 @@ void intel_engines_add_sysfs(struct drm_i915_private *i915)
sysfs_create_file(kobj, &preempt_timeout_attr.attr))
goto err_engine;
+ if (intel_engine_supports_stats(engine) &&
+ sysfs_create_file(kobj, &runtime_attr.attr))
+ goto err_engine;
+
add_defaults(container_of(kobj, struct kobj_engine, base));
if (0) {
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Regards,
Tvrtko
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