From 47e15c6083bac22fe7380594400e577504df86b1 Mon Sep 17 00:00:00 2001
From: Julian Orth <ju.orth@gmail.com>
Date: Tue, 30 Sep 2025 18:43:44 +0200
Subject: [PATCH] vulkan: pre-heat allocations

---
 src/gfx_apis/vulkan/allocator.rs | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/gfx_apis/vulkan/allocator.rs b/src/gfx_apis/vulkan/allocator.rs
index bff766b3..66a2a79c 100644
--- a/src/gfx_apis/vulkan/allocator.rs
+++ b/src/gfx_apis/vulkan/allocator.rs
@@ -4,7 +4,7 @@ use {
         gfx_apis::vulkan::{
             VulkanError, device::VulkanDevice, instance::API_VERSION, renderer::VulkanRenderer,
         },
-        utils::{numcell::NumCell, ptr_ext::MutPtrExt},
+        utils::{numcell::NumCell, page_size::page_size, ptr_ext::MutPtrExt},
     },
     ash::{
         Device,
@@ -304,6 +304,19 @@ impl CpuWork for AllocWork {
             self.usage,
             self.map,
         );
+        if self.usage.contains(UsageFlags::UPLOAD)
+            && let Ok(r) = &r
+            && let Some(ptr) = r.ptr
+        {
+            let page_size = page_size() as u64;
+            let mut offset = 0;
+            while offset < r.block.size() {
+                unsafe {
+                    *ptr.add(offset as usize) = 0;
+                }
+                offset += page_size;
+            }
+        }
         self.res = Some(r);
         None
     }