mask_opt was disabled on AMD GCN for head sizes <= 256, but it is
beneficial there in high-context prefill: on fully-visible causal
blocks it skips the per-block mask load+add, and it skips fully-masked
blocks entirely. The attention op on GCN is compute-bound on the
softmax path (no matrix cores), so this cuts real work.
Verified lossless (perplexity bit-identical with it on vs off) and a
measured prefill win on Qwen3.5-35B-A3B (head_dim 256) on an RX 580:
pp2048 unchanged at short context, +8% @ 16k, +12% @ 32k, growing with
depth. Enable for GCN when HSK/HSV >= 256; the existing large-mask
conditions keep it off for decode.
Assisted-by: Claude
Pinned async host uploads can record into compute_ctx before graph
compute, so the perf logger's opening timestamp must append after them
instead of asserting the context is expired. Without this, profiling
(GGML_VK_PERF_LOGGER) crashes whenever host-register pinning is on.
Assisted-by: Claude
VK_EXT_external_memory_host import fails on RADV for file-backed mmap pages,
so register_host_buffer no-op'd and every MoE-expert upload paid a slow
single-threaded pageable memcpy into the staging buffer each eval (~3 GB/s
effective on the 35B, ~25% of PCIe bandwidth).
When the import fails, fall back to a one-time copy of the region into a
host-visible Vulkan buffer registered in device->pinned_memory under the
mmap's address range. The existing pinned fast path then DMAs straight from
that buffer each eval at full PCIe bandwidth - no per-eval CPU memcpy and no
blocking sync. Costs one-time host-visible memory equal to the CPU-resident
weight region.
Assisted-by: opencode
The generic concat shader reads a transposed source (nb[1]==type_size) with an
uncoalesced stride, which is catastrophically slow on discrete GPUs (~5.6ms for
a 16MB concat on the RX 580 vs ~130us of memory bandwidth), a ~9% prefill
hotspot on Qwen3.5-4B (delta-net state concat).
Add a fast path for concat along dim 0 where one source is stored transposed and
the other source + dst are contiguous along dim 0: copy the contiguous source
with copy.comp and transpose the other source into the matching dst sub-region
with the existing tiled copy_transpose shader (shared-memory 32x32 transpose,
coalesced read+write). Reuses pipeline_cpy_* / pipeline_cpy_transpose_* with
custom push constants + doffset, no new shader. Falls back to the generic path
otherwise (gated on type/shape/contiguity + 16-bit doffset bound).
Assisted-by: opencode
Export register_host_buffer/unregister via the backend reg so the existing
GGML_CUDA_REGISTER_HOST path in llama-model-loader pins mmap'd expert
weights on Vulkan. Imports host pages through VK_EXT_external_memory_host
into device->pinned_memory, letting the existing pinned fast path in
ggml_vk_buffer_write_2d_async DMA straight from system RAM instead of
bouncing through the staging buffer + blocking host memcpy.
A single Vulkan buffer cannot cover a multi-GB mmap (capped at
device->max_buffer_size), so the region is imported in page-aligned
chunks; a bound check makes tensors straddling a chunk boundary fall back
to staging instead of reading out of bounds. Opt-in via
GGML_CUDA_REGISTER_HOST=1 or GGML_VK_REGISTER_HOST=1, no-op otherwise.
Assisted-by: opencode
* Refactor vk_queue to use per-instance mutexes and unique handles
* integrates VK_KHR_internally_synchronized_queues, abstracting the queue submission into a polymorphic interface that completely bypasses host-side mutex locking when driver-side synchronization is supported
* fix compilation error
* fix duplicate pNext chain for VkPhysicalDeviceInternallySynchronizedQueuesFeaturesKHR
* add fallback defines for VK_KHR_internally_synchronized_queues
* add null checks for queues in vk_device_struct destructor
* use unique_ptr for outer queues to enforce exclusive ownership and optimize lifetime
* use static constexpr for eInternallySynchronizedKHR
* add lock guard to ggml_vk_create_aliased_queue for thread safety
* initialize sync_query_features.internallySynchronizedQueues to VK_FALSE
* reuse sync_query_features for internallySynchronizedQueues and simplify chaining
* refactor internallySynchronizedQueues detection
* fix internallySynchronizedQueues query guard
* use eInternallySynchronizedKHR constant
* fix self-referential alias for eInternallySynchronizedKHR
* use macro for eInternallySynchronizedKHR fallback
* fix internallySynchronizedQueues query timing in ggml-vulkan.cpp to prevent device creation mismatch
* reset sync_query_features.pNext before reusing in device creation chain, also removed the redundant second probe call
* refactor internally synchronized queues detection to use chained feature query and avoid redundant API calls
* Update ggml/src/ggml-vulkan/ggml-vulkan.cpp
Co-authored-by: Jeff Bolz <jbolz@nvidia.com>
* Update ggml/src/ggml-vulkan/ggml-vulkan.cpp
Co-authored-by: Jeff Bolz <jbolz@nvidia.com>
* Update ggml/src/ggml-vulkan/ggml-vulkan.cpp
Co-authored-by: Jeff Bolz <jbolz@nvidia.com>
* Update ggml/src/ggml-vulkan/ggml-vulkan.cpp
Co-authored-by: Jeff Bolz <jbolz@nvidia.com>
* Update ggml/src/ggml-vulkan/ggml-vulkan.cpp
Co-authored-by: Jeff Bolz <jbolz@nvidia.com>
* Update ggml/src/ggml-vulkan/ggml-vulkan.cpp
Co-authored-by: Jeff Bolz <jbolz@nvidia.com>
* rename sync_enable_features to internally_synchronized_queues_features
* queue_flags is still computed before has_internally_synchronized_queues is set
* fix trailing whitespace
* replace eInternallySynchronizedKHR macro with static constexpr
* preserve source queue semantics in single-queue aliased transfer queue
* vulkan: fix cmd_pool access via pointer for compute_queue unique_ptr
* vulkan: lock queue during debug label emission when not internally synchronized
---------
Co-authored-by: Jeff Bolz <jbolz@nvidia.com>
* vulkan: Support Q2_0
The backend perf tests for mat-vec-mul weren't very good at first (worse than
q2_k), doubling the rows per workgroup made a big difference.
* reorder
* resolve merge conflict, adjust err threshold for f16->q2_0 set_rows
* vulkan/cpu: Support f16 as SET_ROWS src.
This adds full support for f16 SET_ROWS (equivalent to f32) to vulkan and CPU
backends, and adds more backend tests.
* Set DenormPreserve 16 when supported, to try to fix failures on Intel
* tune error threshold
* update metal supports_op
This uses the new VK_EXT_shader_ocp_microscaling_types extension to do fp4 type
promotions, and also uses the float8 extension to do ue4m3 promotions for
nvfp4. It's reasonable to assume that an implementation that supports fp4 will
also support fp8, so we don't need to handle all possible combinations of
support.
* [Vulkan] Fixes llama-cli breaking over longer promts sizes
The llama-cli was breaking for longer promts sizes for q4_0 quantized networks. Causing due to insufficient shared memory.
* Removed the un-used Adreno device
* Updated matmul for small pipeline.
* vulkan : check src0 type in GGML_OP_SET_ROWS to avoid failures due to unimplemented f16 support
* chore : get rid of else
---------
Co-authored-by: Stanisław Szymczyk <sszymczy@gmail.com>
* vulkan: roll bk loop in matmul for asahi linux
* vulkan: fix inline comment
* vulkan: revert BK-loop unroll change
* vulkan: edit spirv directly for asahi roll bk loop
* vulkan: remove trailing whitespace at the end of comments
* vulkan: add INTEL_PRE_XE2 arch enum and enable coopmat1 on Intel Xe-LPG Plus (1/3, Xe1-ARLH)
Co-authored-by: Xia, Jie <jie.xia@intel.com>
Co-authored-by: Liu, Russell <russell.liu@intel.com>
* Address comments of bf16 and trailing whitespace
* Rename INTEL_PRE_XE2 to INTEL_XE1 and remove driver workaround
* Add Windows driver check
---------
Co-authored-by: Xia, Jie <jie.xia@intel.com>
Co-authored-by: Liu, Russell <russell.liu@intel.com>
* vulkan: make SQR/SQRT/SIN/COS/CLAMP/LEAKY_RELU use unary.comp
* vulkan: make NORM support noncontig
* add noncontiguous row test cases for norm/l2_norm, handle this in the CPU backend and l2_norm.comp
* fix supports_op for cuda and webgpu
* vulkan: add GGML_OP_COL2IM_1D, follow-up to the CPU op
* vulkan: col2im_1d bounded gather loop instead of full-K scan with modulo
* vulkan: col2im_1d address review from @jeffbolznv
* vulkan: col2im_1d return nullptr for unsupported types, address review from @0cc4m
* vulkan: support non-contig unary/glu ops
Change unary/glu ops to pass in all strides and use fastdiv for the index
calculation. Put all unary ops in one file, similar to glu, to share the
code. codex went ahead and added expm1 without me asking, but I had to
make it do a real precision analysis rather than just making stuff up.
unary.comp initially couldn't use generic_unary_head because there wasn't
space for xielu's additional constants. Fixing this required packing the
fastdiv 'L' values.
* attempt to workaround compiler bug
* resolve conflict from #23991
* use expm1
* Make ggml_gated_delta_net take only the initial recurrent state (D, 1, n_seqs) and passes the snapshot count K as an op parameter instead of inferring it from state->ne[1].
Remove the padding hack and copy all emitted snapshots into the recurrent cache with a single strided ggml_cpy
* Make GDN changes in all backends. Address review comments.
* Fix CI build errors
* vulkan: add support for valve fp16 dot2 extension
* use macro for dot2 path choice
* properly check for the feature
* add dot_product abstraction to reduce preprocessor branching
This allows vec4 loads of the B elements. Also increase BK to 64 when this is
enabled. Neither of these alone is consistently faster, but together these give
a nice speedup.
In ggml-vulkan.cpp, we need to make sure the B matrix alignment and stride are
multiples of 4.
* vulkan: add fwht support for Intel with shmem reduction
* don't use N as workgroup size
* disable subgroup shuffle on MoltenVK AMD
* disable fwht shader on Intel Windows due to driver bug
* vulkan: don't hold the device mutex while compiling pipelines
We need to hold a lock while we traverse all pipelines and lazily initialize
them, but we don't need to hold it while the pipeline is being compiled. And
it doesn't need to be the same lock as the device mutex. We call load_shaders
each time a pipeline is needed, so we only need to compile that one pipeline
(and, for example, don't want to end up compiling a pipeline that another
thread should be compiling).
* remove 'needed'
Q2_K/Q3_K/Q6_K do much better when using MMVQ on Intel BMG even
though they're only 2-byte aligned, and Q3_K still wins on
NVIDIA as well.
mesa isn't all that great at coalescing back-to-back loads from
alternating arrays, so we force it instead. Further, we can do
subtraction directly on a full int32_t rather than an i8vec4
with bit twiddling because the high bit is always free to start.
On Intel BMG on mesa, the switch to MMVQ provides an immediate
~57% perf increase in tg128 for unsloth/Qwen3.5-9B-GGUF:Q3_K and
~78% perf increase in tg128 for unsloth/Qwen3.5-9B-GGUF:Q6_K.
The futher switch to block loads leads to a ~24% perf increase in
tg128 for unsloth/Qwen3.5-9B-GGUF:Q3_K and a ~48% perf increase in
tg128 for unsloth/Qwen3.5-9B-GGUF:Q6_K.
Finally, Xe2 wins on MMVQ even for small k, so we take the NVIDIA
override for K quants on Xe2 as well.
* vulkan: add flash attention bf16 kv support
* vulkan: bf16 FA coopmat1 support
* vulkan: bf16 FA coopmat2 support
* fix FA bf16 f32 fallback
* fix FA bf16 coopmat1 shader
* fix FA bf16 coopmat2 shader
* code cleanup
* cleanup comment change
* address feedback
* add O_TYPE for cm2 FA
* use O_TYPE for gqaStore function
* reduce BFLOAT16 ifdefs
Lumpiasty
