From 0bfa01e4662155867effc80204aa2c05e422011f Mon Sep 17 00:00:00 2001
From: Christoph Pillmayer <christoph.pillmayer@arm.com>
Date: Thu, 7 Aug 2025 11:26:12 +0000
Subject: [PATCH] panvk/perfetto: Drop zero duration events

Reviewed-by: Lars-Ivar Hesselberg Simonsen <lars-ivar.simonsen@arm.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36609>
---
 src/panfrost/vulkan/panvk_utrace_perfetto.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/panfrost/vulkan/panvk_utrace_perfetto.cc b/src/panfrost/vulkan/panvk_utrace_perfetto.cc
index a4456db4d36..f71a36bf79a 100644
--- a/src/panfrost/vulkan/panvk_utrace_perfetto.cc
+++ b/src/panfrost/vulkan/panvk_utrace_perfetto.cc
@@ -215,6 +215,13 @@ panvk_utrace_perfetto_end_event(
       return;
    }
 
+   uint64_t duration = ts_ns - ev->begin_ns;
+   /* Drop unwritten and zero duration events.
+    * If the timestamp wraps around, end can be before start. Also drop those. */
+   if (duration == 0 || ts_ns == 0 || ts_ns < ev->begin_ns) {
+      return;
+   }
+
    PanVKRenderpassDataSource::Trace(
       [=](PanVKRenderpassDataSource::TraceContext ctx) {
          struct panvk_utrace_perfetto *utp = &dev->utrace.utp;