Since we wake the GT up before executing a request, and go to sleep as
soon as it is retired, the GT wake time not only represents how long the
device is powered up, but also provides a summary, albeit an overestimate,
of the device runtime (i.e. the rc0 time to compare against rc6 time).
v2: s/busy/awake/
v3: software-awake-time and I915_PMU_SOFTWARE_AWAKE_TIME
Signed-off-by: Chris Wilson
Reviewed-by: Tvrtko Ursulin
Cc: Matthew Brost
---
drivers/gpu/drm/i915/gt/debugfs_gt_pm.c | 5 ++-
drivers/gpu/drm/i915/gt/intel_gt_pm.c| 49
drivers/gpu/drm/i915/gt/intel_gt_pm.h| 2 +
drivers/gpu/drm/i915/gt/intel_gt_types.h | 24
drivers/gpu/drm/i915/i915_debugfs.c | 5 ++-
drivers/gpu/drm/i915/i915_pmu.c | 6 +++
include/uapi/drm/i915_drm.h | 1 +
7 files changed, 89 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/debugfs_gt_pm.c
b/drivers/gpu/drm/i915/gt/debugfs_gt_pm.c
index 174a24553322..8975717ace06 100644
--- a/drivers/gpu/drm/i915/gt/debugfs_gt_pm.c
+++ b/drivers/gpu/drm/i915/gt/debugfs_gt_pm.c
@@ -11,6 +11,7 @@
#include "i915_drv.h"
#include "intel_gt.h"
#include "intel_gt_clock_utils.h"
+#include "intel_gt_pm.h"
#include "intel_llc.h"
#include "intel_rc6.h"
#include "intel_rps.h"
@@ -558,7 +559,9 @@ static int rps_boost_show(struct seq_file *m, void *data)
seq_printf(m, "RPS enabled? %s\n", yesno(intel_rps_is_enabled(rps)));
seq_printf(m, "RPS active? %s\n", yesno(intel_rps_is_active(rps)));
- seq_printf(m, "GPU busy? %s\n", yesno(gt->awake));
+ seq_printf(m, "GPU busy? %s, %llums\n",
+ yesno(gt->awake),
+ ktime_to_ms(intel_gt_get_awake_time(gt)));
seq_printf(m, "Boosts outstanding? %d\n",
atomic_read(>num_waiters));
seq_printf(m, "Interactive? %d\n", READ_ONCE(rps->power.interactive));
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_pm.c
b/drivers/gpu/drm/i915/gt/intel_gt_pm.c
index 274aa0dd7050..c94e8ac884eb 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_pm.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_pm.c
@@ -39,6 +39,28 @@ static void user_forcewake(struct intel_gt *gt, bool suspend)
intel_gt_pm_put(gt);
}
+static void runtime_begin(struct intel_gt *gt)
+{
+ local_irq_disable();
+ write_seqcount_begin(>stats.lock);
+ gt->stats.start = ktime_get();
+ gt->stats.active = true;
+ write_seqcount_end(>stats.lock);
+ local_irq_enable();
+}
+
+static void runtime_end(struct intel_gt *gt)
+{
+ local_irq_disable();
+ write_seqcount_begin(>stats.lock);
+ gt->stats.active = false;
+ gt->stats.total =
+ ktime_add(gt->stats.total,
+ ktime_sub(ktime_get(), gt->stats.start));
+ write_seqcount_end(>stats.lock);
+ local_irq_enable();
+}
+
static int __gt_unpark(struct intel_wakeref *wf)
{
struct intel_gt *gt = container_of(wf, typeof(*gt), wakeref);
@@ -67,6 +89,7 @@ static int __gt_unpark(struct intel_wakeref *wf)
i915_pmu_gt_unparked(i915);
intel_gt_unpark_requests(gt);
+ runtime_begin(gt);
return 0;
}
@@ -79,6 +102,7 @@ static int __gt_park(struct intel_wakeref *wf)
GT_TRACE(gt, "\n");
+ runtime_end(gt);
intel_gt_park_requests(gt);
i915_vma_parked(gt);
@@ -106,6 +130,7 @@ static const struct intel_wakeref_ops wf_ops = {
void intel_gt_pm_init_early(struct intel_gt *gt)
{
intel_wakeref_init(>wakeref, gt->uncore->rpm, _ops);
+ seqcount_mutex_init(>stats.lock, >wakeref.mutex);
}
void intel_gt_pm_init(struct intel_gt *gt)
@@ -339,6 +364,30 @@ int intel_gt_runtime_resume(struct intel_gt *gt)
return intel_uc_runtime_resume(>uc);
}
+static ktime_t __intel_gt_get_awake_time(const struct intel_gt *gt)
+{
+ ktime_t total = gt->stats.total;
+
+ if (gt->stats.active)
+ total = ktime_add(total,
+ ktime_sub(ktime_get(), gt->stats.start));
+
+ return total;
+}
+
+ktime_t intel_gt_get_awake_time(const struct intel_gt *gt)
+{
+ unsigned int seq;
+ ktime_t total;
+
+ do {
+ seq = read_seqcount_begin(>stats.lock);
+ total = __intel_gt_get_awake_time(gt);
+ } while (read_seqcount_retry(>stats.lock, seq));
+
+ return total;
+}
+
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftest_gt_pm.c"
#endif
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_pm.h
b/drivers/gpu/drm/i915/gt/intel_gt_pm.h
index 60f0e2fbe55c..63846a856e7e 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_pm.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_pm.h
@@ -58,6 +58,8 @@ int intel_gt_resume(struct intel_gt *gt);
void intel_gt_runtime_suspend(struct intel_gt *gt);
int intel_gt_runtime_resume(struct intel_gt *gt);
+ktime_t intel_gt_get_awake_time(const struct intel_gt *gt);
+
static inline bool is_mock_gt(const struct
