Chris Wilson <[email protected]> writes:

> Include a count of closed vma when reporting the per_ctx_stats of
> debugfs/i915_gem_objects.
>

The code corresponds for you to report a count of bytes of a closed vmas
and I am not sure which one do you want.

-Mika


> Whilst adjusting the context tracking, note that we can simply use our
> list of contexts in i915->contexts rather than circumlocute via
> dev->filelist and the per-file context idr.
>
> Signed-off-by: Chris Wilson <[email protected]>
> ---
>  drivers/gpu/drm/i915/i915_debugfs.c | 113 +++++++++++-----------------
>  1 file changed, 42 insertions(+), 71 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c 
> b/drivers/gpu/drm/i915/i915_debugfs.c
> index 26b7e5276b15..a05d4bbc0318 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -302,6 +302,7 @@ struct file_stats {
>       u64 total, unbound;
>       u64 global, shared;
>       u64 active, inactive;
> +     u64 closed;
>  };
>  
>  static int per_file_stats(int id, void *ptr, void *data)
> @@ -336,6 +337,9 @@ static int per_file_stats(int id, void *ptr, void *data)
>                       stats->active += vma->node.size;
>               else
>                       stats->inactive += vma->node.size;
> +
> +             if (i915_vma_is_closed(vma))
> +                     stats->closed += vma->node.size;
>       }
>  
>       return 0;
> @@ -343,7 +347,7 @@ static int per_file_stats(int id, void *ptr, void *data)
>  
>  #define print_file_stats(m, name, stats) do { \
>       if (stats.count) \
> -             seq_printf(m, "%s: %lu objects, %llu bytes (%llu active, %llu 
> inactive, %llu global, %llu shared, %llu unbound)\n", \
> +             seq_printf(m, "%s: %lu objects, %llu bytes (%llu active, %llu 
> inactive, %llu global, %llu shared, %llu unbound, %llu closed)\n", \
>                          name, \
>                          stats.count, \
>                          stats.total, \
> @@ -351,7 +355,8 @@ static int per_file_stats(int id, void *ptr, void *data)
>                          stats.inactive, \
>                          stats.global, \
>                          stats.shared, \
> -                        stats.unbound); \
> +                        stats.unbound, \
> +                        stats.closed); \
>  } while (0)
>  
>  static void print_batch_pool_stats(struct seq_file *m,
> @@ -377,44 +382,44 @@ static void print_batch_pool_stats(struct seq_file *m,
>       print_file_stats(m, "[k]batch pool", stats);
>  }
>  
> -static int per_file_ctx_stats(int idx, void *ptr, void *data)
> +static void print_context_stats(struct seq_file *m,
> +                             struct drm_i915_private *i915)
>  {
> -     struct i915_gem_context *ctx = ptr;
> -     struct intel_engine_cs *engine;
> -     enum intel_engine_id id;
> -
> -     for_each_engine(engine, ctx->i915, id) {
> -             struct intel_context *ce = to_intel_context(ctx, engine);
> +     struct file_stats kstats = {};
> +     struct i915_gem_context *ctx;
>  
> -             if (ce->state)
> -                     per_file_stats(0, ce->state->obj, data);
> -             if (ce->ring)
> -                     per_file_stats(0, ce->ring->vma->obj, data);
> -     }
> +     list_for_each_entry(ctx, &i915->contexts.list, link) {
> +             struct file_stats stats = { .file_priv = ctx->file_priv };
> +             struct intel_engine_cs *engine;
> +             enum intel_engine_id id;
>  
> -     return 0;
> -}
> +             for_each_engine(engine, i915, id) {
> +                     struct intel_context *ce = to_intel_context(ctx, 
> engine);
>  
> -static void print_context_stats(struct seq_file *m,
> -                             struct drm_i915_private *dev_priv)
> -{
> -     struct drm_device *dev = &dev_priv->drm;
> -     struct file_stats stats;
> -     struct drm_file *file;
> +                     if (ce->state)
> +                             per_file_stats(0, ce->state->obj, &kstats);
> +                     if (ce->ring)
> +                             per_file_stats(0, ce->ring->vma->obj, &kstats);
> +             }
>  
> -     memset(&stats, 0, sizeof(stats));
> +             if (!IS_ERR_OR_NULL(stats.file_priv)) {
> +                     struct drm_file *file = stats.file_priv->file;
> +                     struct task_struct *task;
>  
> -     mutex_lock(&dev->struct_mutex);
> -     if (dev_priv->kernel_context)
> -             per_file_ctx_stats(0, dev_priv->kernel_context, &stats);
> +                     spin_lock(&file->table_lock);
> +                     idr_for_each(&file->object_idr, per_file_stats, &stats);
> +                     spin_unlock(&file->table_lock);
>  
> -     list_for_each_entry(file, &dev->filelist, lhead) {
> -             struct drm_i915_file_private *fpriv = file->driver_priv;
> -             idr_for_each(&fpriv->context_idr, per_file_ctx_stats, &stats);
> +                     rcu_read_lock();
> +                     task = pid_task(ctx->pid ?: file->pid, PIDTYPE_PID);
> +                     print_file_stats(m,
> +                                      task ? task->comm : "<unknown>",
> +                                      stats);
> +                     rcu_read_unlock();
> +             }
>       }
> -     mutex_unlock(&dev->struct_mutex);
>  
> -     print_file_stats(m, "[k]contexts", stats);
> +     print_file_stats(m, "[k]contexts", kstats);
>  }
>  
>  static int i915_gem_object_info(struct seq_file *m, void *data)
> @@ -426,14 +431,9 @@ static int i915_gem_object_info(struct seq_file *m, void 
> *data)
>       u64 size, mapped_size, purgeable_size, dpy_size, huge_size;
>       struct drm_i915_gem_object *obj;
>       unsigned int page_sizes = 0;
> -     struct drm_file *file;
>       char buf[80];
>       int ret;
>  
> -     ret = mutex_lock_interruptible(&dev->struct_mutex);
> -     if (ret)
> -             return ret;
> -
>       seq_printf(m, "%u objects, %llu bytes\n",
>                  dev_priv->mm.object_count,
>                  dev_priv->mm.object_memory);
> @@ -514,43 +514,14 @@ static int i915_gem_object_info(struct seq_file *m, 
> void *data)
>                                       buf, sizeof(buf)));
>  
>       seq_putc(m, '\n');
> -     print_batch_pool_stats(m, dev_priv);
> -     mutex_unlock(&dev->struct_mutex);
>  
> -     mutex_lock(&dev->filelist_mutex);
> -     print_context_stats(m, dev_priv);
> -     list_for_each_entry_reverse(file, &dev->filelist, lhead) {
> -             struct file_stats stats;
> -             struct drm_i915_file_private *file_priv = file->driver_priv;
> -             struct i915_request *request;
> -             struct task_struct *task;
> -
> -             mutex_lock(&dev->struct_mutex);
> -
> -             memset(&stats, 0, sizeof(stats));
> -             stats.file_priv = file->driver_priv;
> -             spin_lock(&file->table_lock);
> -             idr_for_each(&file->object_idr, per_file_stats, &stats);
> -             spin_unlock(&file->table_lock);
> -             /*
> -              * Although we have a valid reference on file->pid, that does
> -              * not guarantee that the task_struct who called get_pid() is
> -              * still alive (e.g. get_pid(current) => fork() => exit()).
> -              * Therefore, we need to protect this ->comm access using RCU.
> -              */
> -             request = list_first_entry_or_null(&file_priv->mm.request_list,
> -                                                struct i915_request,
> -                                                client_link);
> -             rcu_read_lock();
> -             task = pid_task(request && request->gem_context->pid ?
> -                             request->gem_context->pid : file->pid,
> -                             PIDTYPE_PID);
> -             print_file_stats(m, task ? task->comm : "<unknown>", stats);
> -             rcu_read_unlock();
> +     ret = mutex_lock_interruptible(&dev->struct_mutex);
> +     if (ret)
> +             return ret;
>  
> -             mutex_unlock(&dev->struct_mutex);
> -     }
> -     mutex_unlock(&dev->filelist_mutex);
> +     print_batch_pool_stats(m, dev_priv);
> +     print_context_stats(m, dev_priv);
> +     mutex_unlock(&dev->struct_mutex);
>  
>       return 0;
>  }
> -- 
> 2.18.0
>
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