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drm/i915: Deminish contribution of wait-boosting from clients

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With boosting for missed pageflips, we have a much stronger indication
of when we need to (temporarily) boost GPU frequency to ensure smooth
delivery of frames. So now only allow each client to perform one RPS boost
in each period of GPU activity due to stalling on results.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Deepak S <deepak.s@linux.intel.com>
Reviewed-by: Deepak S <deepak.s@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson
2015-04-07 16:20:32 +01:00
committed by Daniel Vetter
parent 6ad790c0f5
commit 1854d5ca0d
5 changed files with 70 additions and 34 deletions
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39
drivers/gpu/drm/i915/i915_debugfs.c
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@@ -2239,6 +2239,44 @@ static int i915_ppgtt_info(struct seq_file *m, void *data)
return 0;
}
static int i915_rps_boost_info(struct seq_file *m, void *data)
{
struct drm_info_node *node = m->private;
struct drm_device *dev = node->minor->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_file *file;
int ret;
ret = mutex_lock_interruptible(&dev->struct_mutex);
if (ret)
return ret;
ret = mutex_lock_interruptible(&dev_priv->rps.hw_lock);
if (ret)
goto unlock;
list_for_each_entry_reverse(file, &dev->filelist, lhead) {
struct drm_i915_file_private *file_priv = file->driver_priv;
struct task_struct *task;
rcu_read_lock();
task = pid_task(file->pid, PIDTYPE_PID);
seq_printf(m, "%s [%d]: %d boosts%s\n",
task ? task->comm : "<unknown>",
task ? task->pid : -1,
file_priv->rps_boosts,
list_empty(&file_priv->rps_boost) ? "" : ", active");
rcu_read_unlock();
}
seq_printf(m, "Kernel boosts: %d\n", dev_priv->rps.boosts);
mutex_unlock(&dev_priv->rps.hw_lock);
unlock:
mutex_unlock(&dev->struct_mutex);
return ret;
}
static int i915_llc(struct seq_file *m, void *data)
{
struct drm_info_node *node = m->private;
@@ -4704,6 +4742,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
{"i915_ddb_info", i915_ddb_info, 0},
{"i915_sseu_status", i915_sseu_status, 0},
{"i915_drrs_status", i915_drrs_status, 0},
{"i915_rps_boost_info", i915_rps_boost_info, 0},
};
#define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)