[PATCH v2 4/4] drm/msm: Improved debugfs gem stats

Rob Clark
2021-04-01T01:25:07Z

From: Rob Clark <robdclark@chromium.org>

The last patch lost the breakdown of active vs inactive GEM objects in
$debugfs/gem. But we can add some better stats to summarize not just
active vs inactive, but also purgable/purged to make up for that.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
---
drivers/gpu/drm/msm/msm_fb.c | 3 ++-
drivers/gpu/drm/msm/msm_gem.c | 31 ++++++++++++++++++++++++-------
drivers/gpu/drm/msm/msm_gem.h | 11 ++++++++++-
3 files changed, 36 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_fb.c b/drivers/gpu/drm/msm/msm_fb.c
index d42f0665359a..91c0e493aed5 100644
--- a/drivers/gpu/drm/msm/msm_fb.c
+++ b/drivers/gpu/drm/msm/msm_fb.c
@@ -33,6 +33,7 @@ static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {
#ifdef CONFIG_DEBUG_FS
void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
{
+ struct msm_gem_stats stats = {};
int i, n = fb->format->num_planes;

seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",
@@ -42,7 +43,7 @@ void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
for (i = 0; i < n; i++) {
seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
i, fb->offsets[i], fb->pitches[i]);
- msm_gem_describe(fb->obj[i], m);
+ msm_gem_describe(fb->obj[i], m, &stats);
}
}
#endif
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 7ca30e362222..2ecf7f1cef25 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -873,7 +873,8 @@ static void describe_fence(struct dma_fence *fence, const char *type,
fence->seqno);
}

-void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
+void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m,
+ struct msm_gem_stats *stats)
{
struct msm_gem_object *msm_obj = to_msm_bo(obj);
struct dma_resv *robj = obj->resv;
@@ -885,11 +886,23 @@ void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m)

msm_gem_lock(obj);

+ stats->all.count++;
+ stats->all.size += obj->size;
+
+ if (is_active(msm_obj)) {
+ stats->active.count++;
+ stats->active.size += obj->size;
+ }
+
switch (msm_obj->madv) {
case __MSM_MADV_PURGED:
+ stats->purged.count++;
+ stats->purged.size += obj->size;
madv = " purged";
break;
case MSM_MADV_DONTNEED:
+ stats->purgable.count++;
+ stats->purgable.size += obj->size;
madv = " purgeable";
break;
case MSM_MADV_WILLNEED:
@@ -956,20 +969,24 @@ void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m)

void msm_gem_describe_objects(struct list_head *list, struct seq_file *m)
{
+ struct msm_gem_stats stats = {};
struct msm_gem_object *msm_obj;
- int count = 0;
- size_t size = 0;

seq_puts(m, " flags id ref offset kaddr size madv name\n");
list_for_each_entry(msm_obj, list, node) {
struct drm_gem_object *obj = &msm_obj->base;
seq_puts(m, " ");
- msm_gem_describe(obj, m);
- count++;
- size += obj->size;
+ msm_gem_describe(obj, m, &stats);
}

- seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
+ seq_printf(m, "Total: %4d objects, %9zu bytes\n",
+ stats.all.count, stats.all.size);
+ seq_printf(m, "Active: %4d objects, %9zu bytes\n",
+ stats.active.count, stats.active.size);
+ seq_printf(m, "Purgable: %4d objects, %9zu bytes\n",
+ stats.purgable.count, stats.purgable.size);
+ seq_printf(m, "Purged: %4d objects, %9zu bytes\n",
+ stats.purged.count, stats.purged.size);
}
#endif

diff --git a/drivers/gpu/drm/msm/msm_gem.h b/drivers/gpu/drm/msm/msm_gem.h
index e6b28edb1db9..7c7d54bad189 100644
--- a/drivers/gpu/drm/msm/msm_gem.h
+++ b/drivers/gpu/drm/msm/msm_gem.h
@@ -158,7 +158,16 @@ struct drm_gem_object *msm_gem_import(struct drm_device *dev,
__printf(2, 3)
void msm_gem_object_set_name(struct drm_gem_object *bo, const char *fmt, ...);
#ifdef CONFIG_DEBUG_FS
-void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m);
+
+struct msm_gem_stats {
+ struct {
+ unsigned count;
+ size_t size;
+ } all, active, purgable, purged;
+};
+
+void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m,
+ struct msm_gem_stats *stats);
void msm_gem_describe_objects(struct list_head *list, struct seq_file *m);
#endif

--
2.30.2