drm/i915/gt: Show the culmative runtime as part of the engine info

Since we always enable the busy-stats, the culmulative runtime should be
accurate, and might be useful for diagnosing issues with the engine.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200619191053.9654-1-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index c62b3cb..7bf2f76 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -1510,6 +1510,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,
        struct i915_request *rq;
        intel_wakeref_t wakeref;
        unsigned long flags;
+       ktime_t dummy;
 
        if (header) {
                va_list ap;
@@ -1527,6 +1528,10 @@ void intel_engine_dump(struct intel_engine_cs *engine,
                   yesno(!llist_empty(&engine->barrier_tasks)));
        drm_printf(m, "\tLatency: %luus\n",
                   ewma__engine_latency_read(&engine->latency));
+       if (intel_engine_supports_stats(engine))
+               drm_printf(m, "\tRuntime: %llums\n",
+                          ktime_to_ms(intel_engine_get_busy_time(engine,
+                                                                 &dummy)));
        drm_printf(m, "\tForcewake: %x domains, %d active\n",
                   engine->fw_domain, atomic_read(&engine->fw_active));