diff --git a/src/allocator.cpp b/src/allocator.cpp
index 913d86ad7b88..6d5f5290e03a 100644
--- a/src/allocator.cpp
+++ b/src/allocator.cpp
@@ -508,7 +508,7 @@ VkBufferMemory* VkBlobBufferAllocator::fastMalloc(size_t size)
         if (vkdev->info.type == 1)
         {
             // integrated gpu, prefer unified memory
-            memory_type_index = vkdev->find_memory_index(memoryRequirements.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, 0);
+            memory_type_index = vkdev->find_memory_index(memoryRequirements.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, 0);
         }
         else
         {
@@ -758,7 +758,7 @@ VkBufferMemory* VkWeightBufferAllocator::fastMalloc(size_t size)
                 if (vkdev->info.type == 1)
                 {
                     // integrated gpu, prefer unified memory
-                    memory_type_index = vkdev->find_memory_index(memoryRequirements2.memoryRequirements.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, 0);
+                    memory_type_index = vkdev->find_memory_index(memoryRequirements2.memoryRequirements.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, 0);
                 }
                 else
                 {
@@ -805,7 +805,7 @@ VkBufferMemory* VkWeightBufferAllocator::fastMalloc(size_t size)
         if (vkdev->info.type == 1)
         {
             // integrated gpu, prefer unified memory
-            memory_type_index = vkdev->find_memory_index(memoryRequirements.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, 0);
+            memory_type_index = vkdev->find_memory_index(memoryRequirements.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, 0);
         }
         else
         {
@@ -929,9 +929,7 @@ VkBufferMemory* VkStagingBufferAllocator::fastMalloc(size_t size)
     // setup memory type
     if (memory_type_index == (uint32_t)-1)
     {
-        // integrated gpu, prefer unified memory
-        // discrete gpu, prefer the small pcie mappable memory, or fallback to host visible only anyway otherwise
-        memory_type_index = vkdev->find_memory_index(memoryRequirements.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, VK_MEMORY_PROPERTY_HOST_CACHED_BIT | VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
+        memory_type_index = vkdev->find_memory_index(memoryRequirements.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, VK_MEMORY_PROPERTY_HOST_CACHED_BIT, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
     }
 
     ptr->memory = allocate_memory(memoryRequirements.size);
@@ -1113,7 +1111,7 @@ VkImageMemory* VkSimpleImageAllocator::fastMalloc(int width, int height, VkForma
 {
     VkImageMemory* ptr = new VkImageMemory;
 
-    ptr->image = create_image(width, height, format, VK_IMAGE_USAGE_STORAGE_BIT);
+    ptr->image = create_image(width, height, format, VK_IMAGE_USAGE_STORAGE_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT);
 
     VkMemoryRequirements memoryRequirements;
     vkGetImageMemoryRequirements(vkdev->vkdevice(), ptr->image, &memoryRequirements);
diff --git a/src/command.cpp b/src/command.cpp
index 9261cb243565..99f1ff90e466 100644
--- a/src/command.cpp
+++ b/src/command.cpp
@@ -332,6 +332,23 @@ void VkCompute::record_write_timestamp(uint32_t query)
 }
 #endif // NCNN_BENCHMARK
 
+void VkCompute::record_queue_transfer_acquire(const VkMat& m, uint32_t src_queue_family_index)
+{
+    if (queue_family_index == src_queue_family_index)
+        return;
+
+    if (vkdev->info.support_VK_KHR_push_descriptor)
+        return queue_transfer_acquire_barrier(m.buffer(), m.buffer_offset(), m.total() * m.elemsize, src_queue_family_index);
+
+    record_type r;
+    r.type = 16;
+    r.queue_transfer_acquire_barrier.buffer = m.buffer();
+    r.queue_transfer_acquire_barrier.offset = m.buffer_offset();
+    r.queue_transfer_acquire_barrier.size = m.total() * m.elemsize;
+    r.queue_transfer_acquire_barrier.src_queue_family_index = src_queue_family_index;
+    delayed_records.push_back(r);
+}
+
 #if __ANDROID_API__ >= 26
 void VkCompute::record_import_android_hardware_buffer(const ImportAndroidHardwareBufferPipeline* pipeline, const VkImageMat& im, const VkMat& m)
 {
@@ -870,6 +887,9 @@ int VkCompute::submit_and_wait()
         case 15:
             compute_host_barrier(r.compute_host_barrier.buffer, r.compute_host_barrier.offset, r.compute_host_barrier.size);
             break;
+        case 16:
+            queue_transfer_acquire_barrier(r.queue_transfer_acquire_barrier.buffer, r.queue_transfer_acquire_barrier.offset, r.queue_transfer_acquire_barrier.size, r.queue_transfer_acquire_barrier.src_queue_family_index);
+            break;
         }
     }
 
@@ -1180,6 +1200,27 @@ void VkCompute::compute_host_barrier(VkBuffer buffer, size_t offset, size_t size
     vkCmdPipelineBarrier(command_buffer, srcStageMask, dstStageMask, 0, 0, 0, 1, &bufferBarrier, 0, 0);
 }
 
+void VkCompute::queue_transfer_acquire_barrier(VkBuffer buffer, size_t offset, size_t size, uint32_t src_queue_family_index)
+{
+//     fprintf(stderr, "cmd queue_transfer_acquire_barrier %p[+%lu] %lu   %lu -> %lu\n", buffer, offset, size, src_queue_family_index, queue_family_index);
+
+    VkBufferMemoryBarrier bufferBarrier;
+    bufferBarrier.sType = VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER;
+    bufferBarrier.pNext = 0;
+    bufferBarrier.srcAccessMask = 0;
+    bufferBarrier.dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
+    bufferBarrier.srcQueueFamilyIndex = src_queue_family_index;
+    bufferBarrier.dstQueueFamilyIndex = queue_family_index;
+    bufferBarrier.buffer = buffer;
+    bufferBarrier.offset = offset;
+    bufferBarrier.size = size;
+
+    VkPipelineStageFlags srcStageMask = VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT;
+    VkPipelineStageFlags dstStageMask = VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT;
+
+    vkCmdPipelineBarrier(command_buffer, srcStageMask, dstStageMask, 0, 0, 0, 1, &bufferBarrier, 0, 0);
+}
+
 void VkCompute::initial_image_compute_barrier(VkImage image)
 {
 //     fprintf(stderr, "cmd initial_image_compute_barrier %p %lu %lu\n", image, oldlayout, newlayout);
@@ -1275,9 +1316,13 @@ void VkTransfer::record_upload(const Mat& src, VkMat& dst, const Option& opt)
     // set weight blob as readonly
     dst.data->state = 4;
 
-    if (dst.allocator->mappable)
+    // we can skip queue transfer and staging buffer allocation
+    // only on unified memory architecture and unified compute/transfer queue
+    // which is usually the case on integrated gpu / cpu
+    if (dst.allocator->mappable && queue_family_index == vkdev->info.compute_queue_family_index)
     {
         dst.upload(src_flattened);
+
         return;
     }
 
@@ -1317,6 +1362,8 @@ int VkTransfer::submit_and_wait()
         mapped_ptr_offset += alignSize(r.size, buffer_offset_alignment);
     }
 
+    staging_vkallocator->flush(staging_data);
+
     begin_command_buffer();
 
 //     fprintf(stderr, "cmd transfer %p %lu\n", staging_data->buffer, staging_buffer_size);
@@ -1332,32 +1379,32 @@ int VkTransfer::submit_and_wait()
         staging_buffer_offset += alignSize(r.size, buffer_offset_alignment);
     }
 
-//     // finish TODO queue owner transfer release
-//     std::vector<VkBufferMemoryBarrier> bufferBarriers(transfer_count);
-//     for (int i=0; i<transfer_count; i++)
-//     {
-//         const record_type& r = delayed_records[i];
-//
-//         bufferBarriers[i].sType = VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER;
-//         bufferBarriers[i].pNext = 0;
-//         bufferBarriers[i].srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
-//         bufferBarriers[i].dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
-//         bufferBarriers[i].srcQueueFamilyIndex = queue_family_index;
-//         bufferBarriers[i].dstQueueFamilyIndex = vkdev->info.compute_queue_family_index;
-//         bufferBarriers[i].buffer = r.vkmat.buffer();
-//         bufferBarriers[i].offset = r.vkmat.buffer_offset();
-//         bufferBarriers[i].size = r.size;
-//     }
-//
-//     VkPipelineStageFlags srcStageMask = VK_PIPELINE_STAGE_TRANSFER_BIT;
-//     VkPipelineStageFlags dstStageMask = VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT;
-//
-//     vkCmdPipelineBarrier(command_buffer, srcStageMask, dstStageMask, 0, 0, 0, transfer_count, bufferBarriers.data(), 0, 0);
+    // owner transfer release
+    for (int i=0; i<transfer_count; i++)
+    {
+        const record_type& r = delayed_records[i];
+
+        queue_transfer_release_barrier(r.vkmat.buffer(), r.vkmat.buffer_offset(), r.size, vkdev->info.compute_queue_family_index);
+    }
 
     end_command_buffer();
 
     int ret = queue_submit_and_wait_fence();
 
+    // compute queue owner transfer acquire
+    {
+        VkCompute cmd(vkdev);
+
+        for (int i=0; i<transfer_count; i++)
+        {
+            const record_type& r = delayed_records[i];
+
+            cmd.record_queue_transfer_acquire(r.vkmat, queue_family_index);
+        }
+
+        cmd.submit_and_wait();
+    }
+
     // deallocate staging buffer
     staging_vkallocator->fastFree(staging_data);
     staging_data = 0;
@@ -1386,6 +1433,27 @@ void VkTransfer::copy_buffer_regions(VkBuffer src, VkBuffer dst, const std::vect
     vkCmdCopyBuffer(command_buffer, src, dst, regions.size(), regions.data());
 }
 
+void VkTransfer::queue_transfer_release_barrier(VkBuffer buffer, size_t offset, size_t size, uint32_t dst_queue_family_index)
+{
+//     fprintf(stderr, "cmd queue_transfer_release_barrier %p[+%lu] %lu   %lu -> %lu\n", buffer, offset, size, queue_family_index, dst_queue_family_index);
+
+    VkBufferMemoryBarrier bufferBarrier;
+    bufferBarrier.sType = VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER;
+    bufferBarrier.pNext = 0;
+    bufferBarrier.srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
+    bufferBarrier.dstAccessMask = 0;
+    bufferBarrier.srcQueueFamilyIndex = queue_family_index;
+    bufferBarrier.dstQueueFamilyIndex = dst_queue_family_index;
+    bufferBarrier.buffer = buffer;
+    bufferBarrier.offset = offset;
+    bufferBarrier.size = size;
+
+    VkPipelineStageFlags srcStageMask = VK_PIPELINE_STAGE_TRANSFER_BIT;
+    VkPipelineStageFlags dstStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
+
+    vkCmdPipelineBarrier(command_buffer, srcStageMask, dstStageMask, 0, 0, 0, 1, &bufferBarrier, 0, 0);
+}
+
 } // namespace ncnn
 
 #endif // NCNN_VULKAN
diff --git a/src/command.h b/src/command.h
index 49ab022e08c4..cc161cb2c27c 100644
--- a/src/command.h
+++ b/src/command.h
@@ -69,7 +69,11 @@ class VkCompute : public Command
 
     void record_pipeline(const Pipeline* pipeline, const std::vector<VkMat>& bindings, const std::vector<vk_constant_type>& constants, const VkMat& m);
 
+#if NCNN_BENCHMARK
     void record_write_timestamp(uint32_t query);
+#endif // NCNN_BENCHMARK
+
+    void record_queue_transfer_acquire(const VkMat& m, uint32_t src_queue_family_index);
 
 #if __ANDROID_API__ >= 26
     void record_import_android_hardware_buffer(const ImportAndroidHardwareBufferPipeline* pipeline, const VkImageMat& im, const VkMat& m);
@@ -134,6 +138,7 @@ class VkCompute : public Command
     void transfer_host_barrier(VkBuffer buffer, size_t offset, size_t size);
     void host_compute_barrier(VkBuffer buffer, size_t offset, size_t size);
     void compute_host_barrier(VkBuffer buffer, size_t offset, size_t size);
+    void queue_transfer_acquire_barrier(VkBuffer buffer, size_t offset, size_t size, uint32_t src_queue_family_index);
     void initial_image_compute_barrier(VkImage image);
 #if __ANDROID_API__ >= 26
     void update_import_android_hardware_buffer_bindings(VkPipelineLayout pipeline_layout, VkDescriptorUpdateTemplateKHR descriptor_update_template, const VkDescriptorImageInfo& descriptorImageInfo, const VkDescriptorBufferInfo& descriptorBufferInfo);
@@ -165,6 +170,7 @@ class VkCompute : public Command
         // 13=transfer-host barrier
         // 14=host-compute barrier
         // 15=compute-host barrier
+        // 16=queue-transfer-acquire barrier
         int type;
 
         union
@@ -187,6 +193,7 @@ class VkCompute : public Command
         struct { VkBuffer buffer; size_t offset; size_t size; } transfer_host_barrier;
         struct { VkBuffer buffer; size_t offset; size_t size; } host_compute_barrier;
         struct { VkBuffer buffer; size_t offset; size_t size; } compute_host_barrier;
+        struct { VkBuffer buffer; size_t offset; size_t size; size_t src_queue_family_index; } queue_transfer_acquire_barrier;
         };
 
         std::vector<VkBufferCopy> regions;
@@ -218,6 +225,7 @@ class VkTransfer : public Command
     // recording issue
     void copy_buffer(VkBuffer src, size_t src_offset, VkBuffer dst, size_t dst_offset, size_t size);
     void copy_buffer_regions(VkBuffer src, VkBuffer dst, const std::vector<VkBufferCopy>& regions);
+    void queue_transfer_release_barrier(VkBuffer buffer, size_t offset, size_t size, uint32_t target_queue_family_index);
 
 protected:
     size_t buffer_offset_alignment;
diff --git a/src/gpu.cpp b/src/gpu.cpp
index 12009503d453..1c5b74edb5e0 100644
--- a/src/gpu.cpp
+++ b/src/gpu.cpp
@@ -31,7 +31,7 @@
 #if __ANDROID__
 #define ENABLE_VALIDATION_LAYER 0
 #else
-#define ENABLE_VALIDATION_LAYER 1
+#define ENABLE_VALIDATION_LAYER 0
 #endif
 
 namespace ncnn {