diff --git a/webrender/src/profiler.rs b/webrender/src/profiler.rs
index e28d70ccde..da3f6902f9 100644
--- a/webrender/src/profiler.rs
+++ b/webrender/src/profiler.rs
@@ -82,6 +82,10 @@ pub trait ProfilerHooks : Send + Sync {
     /// be a C string (null terminated).
     fn end_marker(&self, label: &CStr);
 
+    /// Called to mark an event happening. The label must
+    /// be a C string (null terminated).
+    fn event_marker(&self, label: &CStr);
+
     /// Called with a duration to indicate a text marker that just ended. Text
     /// markers allow different types of entries to be recorded on the same row
     /// in the timeline, by adding labels to the entry.
@@ -123,6 +127,15 @@ pub fn add_text_marker(label: &CStr, text: &str, duration: Duration) {
     }
 }
 
+/// Records a marker of the given duration that just ended.
+pub fn add_event_marker(label: &CStr) {
+    unsafe {
+        if let Some(ref hooks) = PROFILER_HOOKS {
+            hooks.event_marker(label);
+        }
+    }
+}
+
 /// Returns true if the current thread is being profiled.
 pub fn thread_is_being_profiled() -> bool {
     unsafe {
diff --git a/webrender/src/renderer.rs b/webrender/src/renderer.rs
index dc017c0d1c..1f40e5218f 100644
--- a/webrender/src/renderer.rs
+++ b/webrender/src/renderer.rs
@@ -78,7 +78,7 @@ use crate::picture::{RecordedDirtyRegion, tile_cache_sizes, ResolvedSurfaceTextu
 use crate::prim_store::DeferredResolve;
 use crate::profiler::{BackendProfileCounters, FrameProfileCounters, TimeProfileCounter,
                GpuProfileTag, RendererProfileCounters, RendererProfileTimers};
-use crate::profiler::{Profiler, ChangeIndicator, ProfileStyle};
+use crate::profiler::{Profiler, ChangeIndicator, ProfileStyle, add_event_marker};
 use crate::device::query::{GpuProfiler, GpuDebugMethod};
 use rayon::{ThreadPool, ThreadPoolBuilder};
 use crate::record::ApiRecordingReceiver;
@@ -96,6 +96,7 @@ use crate::render_target::{RenderTarget, TextureCacheRenderTarget, RenderTargetL
 use crate::render_target::{RenderTargetKind, BlitJob, BlitJobSource};
 use crate::render_task_graph::RenderPassKind;
 use crate::util::drain_filter;
+use crate::c_str;
 
 use std;
 use std::cmp;
@@ -3581,6 +3582,12 @@ impl Renderer {
         upload_time.profile(|| {
             for update_list in pending_texture_updates.drain(..) {
                 for allocation in update_list.allocations {
+                    match allocation.kind {
+                        TextureCacheAllocationKind::Alloc(_) => add_event_marker(c_str!("TextureCacheAlloc")),
+                        TextureCacheAllocationKind::Realloc(_) => add_event_marker(c_str!("TextureCacheRealloc")),
+                        TextureCacheAllocationKind::Reset(_) => add_event_marker(c_str!("TextureCacheReset")),
+                        TextureCacheAllocationKind::Free => add_event_marker(c_str!("TextureCacheFree")),
+                    };
                     let old = match allocation.kind {
                         TextureCacheAllocationKind::Alloc(ref info) |
                         TextureCacheAllocationKind::Realloc(ref info) |
diff --git a/webrender/src/util.rs b/webrender/src/util.rs
index 97fa01258b..cefbfc1080 100644
--- a/webrender/src/util.rs
+++ b/webrender/src/util.rs
@@ -1178,3 +1178,13 @@ pub fn round_up_to_multiple(val: usize, mul: NonZeroUsize) -> usize {
     }
 }
 
+
+#[macro_export]
+macro_rules! c_str {
+    ($lit:expr) => {
+        unsafe {
+            std::ffi::CStr::from_ptr(concat!($lit, "\0").as_ptr()
+                                     as *const std::os::raw::c_char)
+        }
+    }
+}