Re: [PATCH] drm/i915/fdinfo: Don't show engine classes not present

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On 16/06/2022 15:19, Umesh Nerlige Ramappa wrote:
On Thu, Jun 16, 2022 at 03:00:56PM +0100, Tvrtko Ursulin wrote:
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>

Stop displaying engine classes with no engines - it is not a huge problem
if they are shown, since the values will correctly be all zeroes, but it
does count as misleading.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Fixes: 055634e4b62f ("drm/i915: Expose client engine utilisation via fdinfo")
Cc: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drm_client.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drm_client.c b/drivers/gpu/drm/i915/i915_drm_client.c
index 18d38cb59923..b09d1d386574 100644
--- a/drivers/gpu/drm/i915/i915_drm_client.c
+++ b/drivers/gpu/drm/i915/i915_drm_client.c
@@ -116,8 +116,9 @@ show_client_class(struct seq_file *m,
        total += busy_add(ctx, class);
    rcu_read_unlock();

-    seq_printf(m, "drm-engine-%s:\t%llu ns\n",
-           uabi_class_names[class], total);
+    if (capacity)
+        seq_printf(m, "drm-engine-%s:\t%llu ns\n",
+               uabi_class_names[class], total);

Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>

Thanks, pushed!

Regards,

Tvrtko



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