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anv: add a new NO_LOCAL_MEM allocation flag

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We found a perf regression with 9027c5df4c ("anv: remove the
LOCAL_MEM allocation bit") which seems to be that we over subscribe
local memory, leading i915 to swap things in/out too much.

This change avoid putting buffers in local memory if they are not
allocated from a DEVICE_LOCAL heap.

Maybe we can revisit this later if i915 is better able to deal with
more buffers in local memory.

v2: Remove implicit_css from anv_bo when not in lmem (Ivan)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 9027c5df4c ("anv: remove the LOCAL_MEM allocation bit")
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/7188
Reviewed-by: Ivan Briano <ivan.briano@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18395>
This commit is contained in:
Lionel Landwerlin
2022-09-02 21:53:18 +03:00
committed by Marge Bot
parent f41a6504a1
commit 492761ab8d
3 changed files with 15 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
src/intel/vulkan/anv_allocator.c
View File

@@ -1463,15 +1463,19 @@ anv_device_alloc_bo(struct anv_device *device,
/* This always try to put the object in local memory. Here
* vram_non_mappable & vram_mappable actually are the same region.
*/
regions[nregions++] = device->physical->vram_non_mappable.region;
if (alloc_flags & ANV_BO_ALLOC_NO_LOCAL_MEM)
regions[nregions++] = device->physical->sys.region;
else
regions[nregions++] = device->physical->vram_non_mappable.region;
/* If the buffer is mapped on the host, add the system memory region.
* This ensures that if the buffer cannot live in mappable local memory,
* it can be spilled to system memory.
*/
uint32_t flags = 0;
if ((alloc_flags & ANV_BO_ALLOC_MAPPED) ||
(alloc_flags & ANV_BO_ALLOC_LOCAL_MEM_CPU_VISIBLE)) {
if (!(alloc_flags & ANV_BO_ALLOC_NO_LOCAL_MEM) &&
((alloc_flags & ANV_BO_ALLOC_MAPPED) ||
(alloc_flags & ANV_BO_ALLOC_LOCAL_MEM_CPU_VISIBLE))) {
regions[nregions++] = device->physical->sys.region;
if (device->physical->vram_non_mappable.size > 0)
flags |= I915_GEM_CREATE_EXT_FLAG_NEEDS_CPU_ACCESS;
@@ -1497,7 +1501,8 @@ anv_device_alloc_bo(struct anv_device *device,
.is_external = (alloc_flags & ANV_BO_ALLOC_EXTERNAL),
.has_client_visible_address =
(alloc_flags & ANV_BO_ALLOC_CLIENT_VISIBLE_ADDRESS) != 0,
.has_implicit_ccs = ccs_size > 0 || device->info->verx10 >= 125,
.has_implicit_ccs = ccs_size > 0 ||
(device->info->verx10 >= 125 && !(alloc_flags & ANV_BO_ALLOC_NO_LOCAL_MEM)),
};
if (alloc_flags & ANV_BO_ALLOC_MAPPED) {

3
src/intel/vulkan/anv_device.c
View File

@@ -3852,6 +3852,9 @@ VkResult anv_AllocateMemory(
(mem_type->propertyFlags & VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT))
alloc_flags |= ANV_BO_ALLOC_LOCAL_MEM_CPU_VISIBLE;
if (!(mem_type->propertyFlags & VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT))
alloc_flags |= ANV_BO_ALLOC_NO_LOCAL_MEM;
if (vk_flags & VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT)
alloc_flags |= ANV_BO_ALLOC_CLIENT_VISIBLE_ADDRESS;

3
src/intel/vulkan/anv_private.h
View File

@@ -1237,6 +1237,9 @@ enum anv_bo_alloc_flags {
/** This buffer is allocated from local memory and should be cpu visible */
ANV_BO_ALLOC_LOCAL_MEM_CPU_VISIBLE = (1 << 10),
/** For non device local allocations */
ANV_BO_ALLOC_NO_LOCAL_MEM = (1 << 11),
};
VkResult anv_device_alloc_bo(struct anv_device *device,