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vulkan: warptiles currently assume warp sizes <= 64, clamp to work around larger warps (#27726)

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This commit is contained in:
Ruben Ortlam
2026-08-26 19:02:06 +03:00
committed by GitHub
parent bf94216469
commit 5e6a37cb11
1 changed files with 37 additions and 31 deletions
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ggml/src/ggml-vulkan/ggml-vulkan.cpp
+37 -31
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@@ -4171,10 +4171,16 @@ static void ggml_vk_load_shaders(vk_device& device, vk_pipeline requested) {
const uint32_t subgroup_size_16 = std::max(device->subgroup_size, 16u);
const uint32_t subgroup_size_32 = std::max(device->subgroup_size, 32u);
// clamp WARP for l_/m_ warptiles so WM <= BM (breaks on subgroupSize > 64)
const uint32_t mm_warp_8 = std::min(subgroup_size_8, 64u);
const uint32_t mm_warp_16 = std::min(subgroup_size_16, 64u);
const uint32_t mul_mat_subgroup_size = (device->vendor_id == VK_VENDOR_ID_INTEL && device->subgroup_size_control) ? device->subgroup_min_size : device->subgroup_size;
const uint32_t mul_mat_subgroup_size_8 = std::max(mul_mat_subgroup_size, 8u);
const uint32_t mul_mat_subgroup_size_16 = std::max(mul_mat_subgroup_size, 16u);
const uint32_t mul_mat_subgroup_size_32 = std::max(mul_mat_subgroup_size, 32u);
const uint32_t mul_mat_mm_warp_8 = std::min(mul_mat_subgroup_size_8, 64u);
const uint32_t mul_mat_mm_warp_16 = std::min(mul_mat_subgroup_size_16, 64u);
const bool subgroup_min_size_16 = (!device->subgroup_size_control && device->subgroup_size >= 16) ||
(device->subgroup_size_control && device->subgroup_max_size >= 16);
@@ -4255,39 +4261,39 @@ static void ggml_vk_load_shaders(vk_device& device, vk_pipeline requested) {
const uint32_t s_warptile_wm = device->subgroup_size == 8 ? 8 : 32;
l_warptile = { 128, 128, 128, 16, subgroup_size_8 * 2, 64, 2, tm_l, tn_l, tk_l, subgroup_size_8 };
m_warptile = { 128, 64, 64, 16, subgroup_size_8, 32, 2, tm_m, tn_m, tk_m, subgroup_size_8 };
s_warptile = { subgroup_size_32, 32, 32, 16, s_warptile_wm, 32, 2, tm_s, tn_s, tk_s, subgroup_size_8 };
l_warptile = { 128, 128, 128, 16, mm_warp_8 * 2, 64, 2, tm_l, tn_l, tk_l, mm_warp_8 };
m_warptile = { 128, 64, 64, 16, mm_warp_8, 32, 2, tm_m, tn_m, tk_m, mm_warp_8 };
s_warptile = { subgroup_size_32, 32, 32, 16, s_warptile_wm, 32, 2, tm_s, tn_s, tk_s, subgroup_size_8 };
l_warptile_mmq = { 128, 128, 128, 32, subgroup_size_8 * 2, 64, 2, tm_l, tn_l, tk_l, subgroup_size_8 };
m_warptile_mmq = { 128, 64, 64, 32, subgroup_size_8, 32, 2, tm_m, tn_m, tk_m, subgroup_size_8 };
s_warptile_mmq = { subgroup_size_32, 32, 32, 32, s_warptile_wm, 32, 2, tm_s, tn_s, tk_s, subgroup_size_8 };
l_warptile_mmq = { 128, 128, 128, 32, mm_warp_8 * 2, 64, 2, tm_l, tn_l, tk_l, mm_warp_8 };
m_warptile_mmq = { 128, 64, 64, 32, mm_warp_8, 32, 2, tm_m, tn_m, tk_m, mm_warp_8 };
s_warptile_mmq = { subgroup_size_32, 32, 32, 32, s_warptile_wm, 32, 2, tm_s, tn_s, tk_s, subgroup_size_8 };
// Integer MMQ has a smaller shared memory profile, but heavier register use
l_warptile_mmq_int = { 128, 128, 128, 32, subgroup_size_8 * 2, 64, 2, 4, 4, 1, subgroup_size_8 };
m_warptile_mmq_int = { 128, 64, 64, 32, subgroup_size_8, 32, 2, 2, 2, 1, subgroup_size_8 };
s_warptile_mmq_int = { subgroup_size_32, 32, 32, 32, s_warptile_wm, 32, 2, 2, 1, 1, subgroup_size_8 };
l_warptile_mmq_int = { 128, 128, 128, 32, mm_warp_8 * 2, 64, 2, 4, 4, 1, mm_warp_8 };
m_warptile_mmq_int = { 128, 64, 64, 32, mm_warp_8, 32, 2, 2, 2, 1, mm_warp_8 };
s_warptile_mmq_int = { subgroup_size_32, 32, 32, 32, s_warptile_wm, 32, 2, 2, 1, 1, subgroup_size_8 };
// K-quants use even more registers, mitigate by setting WMITER to 1
l_warptile_mmq_int_k = { 128, 128, 128, 32, subgroup_size_8 * 2, 64, 1, 4, 4, 1, subgroup_size_8 };
m_warptile_mmq_int_k = { 128, 64, 64, 32, subgroup_size_8, 32, 1, 2, 2, 1, subgroup_size_8 };
s_warptile_mmq_int_k = { subgroup_size_32, 32, 32, 32, s_warptile_wm, 32, 1, 2, 1, 1, subgroup_size_8 };
l_warptile_mmq_int_k = { 128, 128, 128, 32, mm_warp_8 * 2, 64, 1, 4, 4, 1, mm_warp_8 };
m_warptile_mmq_int_k = { 128, 64, 64, 32, mm_warp_8, 32, 1, 2, 2, 1, mm_warp_8 };
s_warptile_mmq_int_k = { subgroup_size_32, 32, 32, 32, s_warptile_wm, 32, 1, 2, 1, 1, subgroup_size_8 };
l_warptile_id = { 128, 128, 128, 16, mul_mat_subgroup_size_16 * 2, 64, 2, tm_l, tn_l, tk_l, mul_mat_subgroup_size_16 };
m_warptile_id = { 128, 64, 64, 16, mul_mat_subgroup_size_16, 32, 2, tm_m, tn_m, tk_m, mul_mat_subgroup_size_16 };
s_warptile_id = { mul_mat_subgroup_size_16, 32, 32, 16, s_warptile_wm, 32, 2, tm_s, tn_s, tk_s, mul_mat_subgroup_size_16 };
l_warptile_id = { 128, 128, 128, 16, mul_mat_mm_warp_16 * 2, 64, 2, tm_l, tn_l, tk_l, mul_mat_mm_warp_16 };
m_warptile_id = { 128, 64, 64, 16, mul_mat_mm_warp_16, 32, 2, tm_m, tn_m, tk_m, mul_mat_mm_warp_16 };
s_warptile_id = { mul_mat_subgroup_size_16, 32, 32, 16, s_warptile_wm, 32, 2, tm_s, tn_s, tk_s, mul_mat_subgroup_size_16 };
l_warptile_mmqid = { 128, 128, 128, 32, mul_mat_subgroup_size_8 * 2, 64, 2, tm_l, tn_l, tk_l, mul_mat_subgroup_size_8 };
m_warptile_mmqid = { 128, 64, 64, 32, mul_mat_subgroup_size_8, 32, 2, tm_m, tn_m, tk_m, mul_mat_subgroup_size_8 };
s_warptile_mmqid = { mul_mat_subgroup_size_32, 32, 32, 32, s_warptile_wm, 32, 2, tm_s, tn_s, tk_s, mul_mat_subgroup_size_8 };
l_warptile_mmqid = { 128, 128, 128, 32, mul_mat_mm_warp_8 * 2, 64, 2, tm_l, tn_l, tk_l, mul_mat_mm_warp_8 };
m_warptile_mmqid = { 128, 64, 64, 32, mul_mat_mm_warp_8, 32, 2, tm_m, tn_m, tk_m, mul_mat_mm_warp_8 };
s_warptile_mmqid = { mul_mat_subgroup_size_32, 32, 32, 32, s_warptile_wm, 32, 2, tm_s, tn_s, tk_s, mul_mat_subgroup_size_8 };
l_warptile_mmqid_int = { 128, 128, 128, 32, mul_mat_subgroup_size_8 * 2, 64, 2, 4, 4, 1, mul_mat_subgroup_size_8 };
m_warptile_mmqid_int = { 128, 64, 64, 32, mul_mat_subgroup_size_8, 32, 2, 2, 2, 1, mul_mat_subgroup_size_8 };
s_warptile_mmqid_int = { mul_mat_subgroup_size_32, 32, 32, 32, s_warptile_wm, 32, 2, 2, 1, 1, mul_mat_subgroup_size_8 };
l_warptile_mmqid_int = { 128, 128, 128, 32, mul_mat_mm_warp_8 * 2, 64, 2, 4, 4, 1, mul_mat_mm_warp_8 };
m_warptile_mmqid_int = { 128, 64, 64, 32, mul_mat_mm_warp_8, 32, 2, 2, 2, 1, mul_mat_mm_warp_8 };
s_warptile_mmqid_int = { mul_mat_subgroup_size_32, 32, 32, 32, s_warptile_wm, 32, 2, 2, 1, 1, mul_mat_subgroup_size_8 };
l_warptile_mmqid_int_k = { 128, 128, 128, 32, mul_mat_subgroup_size_16 * 2, 64, 1, 4, 4, 1, mul_mat_subgroup_size_16 };
m_warptile_mmqid_int_k = { 128, 64, 64, 32, mul_mat_subgroup_size_16, 32, 1, 2, 2, 1, mul_mat_subgroup_size_16 };
s_warptile_mmqid_int_k = { mul_mat_subgroup_size_32, 32, 32, 32, s_warptile_wm, 32, 1, 2, 1, 1, mul_mat_subgroup_size_16 };
l_warptile_mmqid_int_k = { 128, 128, 128, 32, mul_mat_mm_warp_16 * 2, 64, 1, 4, 4, 1, mul_mat_mm_warp_16 };
m_warptile_mmqid_int_k = { 128, 64, 64, 32, mul_mat_mm_warp_16, 32, 1, 2, 2, 1, mul_mat_mm_warp_16 };
s_warptile_mmqid_int_k = { mul_mat_subgroup_size_32, 32, 32, 32, s_warptile_wm, 32, 1, 2, 1, 1, mul_mat_subgroup_size_16 };
// chip specific tuning
if ((device->architecture == AMD_GCN) && (device->driver_id != vk::DriverId::eAmdProprietary)) {
@@ -4295,13 +4301,13 @@ static void ggml_vk_load_shaders(vk_device& device, vk_pipeline requested) {
m_warptile_mmqid = m_warptile_mmqid_int = { 256, 64, 64, 32, 16, 16, 2, 2, 2, 1, 16 };
} else if (device->vendor_id == VK_VENDOR_ID_AMD && device->coopmat_support && device->driver_id != vk::DriverId::eAmdProprietary) {
// This is intentionally using tx_m values, slight performance increase
l_warptile = { 256, 128, 128, 16, subgroup_size_8, 64, 2, tm_m, tn_m, tk_m, subgroup_size_8 };
l_warptile_mmq = l_warptile_mmq_int = { 256, 128, 128, 32, subgroup_size_8, 64, 2, tm_m, tn_m, tk_m, subgroup_size_8 };
l_warptile_mmq_int_k = { 256, 128, 128, 32, subgroup_size_16, 64, 1, 4, 2, 1, subgroup_size_16 };
l_warptile = { 256, 128, 128, 16, mm_warp_8, 64, 2, tm_m, tn_m, tk_m, mm_warp_8 };
l_warptile_mmq = l_warptile_mmq_int = { 256, 128, 128, 32, mm_warp_8, 64, 2, tm_m, tn_m, tk_m, mm_warp_8 };
l_warptile_mmq_int_k = { 256, 128, 128, 32, mm_warp_16, 64, 1, 4, 2, 1, mm_warp_16 };
} else if (device->vendor_id == VK_VENDOR_ID_INTEL && device->coopmat_support) {
// Xe2/Xe3 with coopmat enabled - warptile performance tuning
l_warptile = { 512, 128, 128, 16, subgroup_size_8, 32, 2, tm_m, tn_m, tk_m, subgroup_size_8 };
l_warptile_mmq = { 512, 128, 128, 32, subgroup_size_8, 32, 2, tm_m, tn_m, tk_m, subgroup_size_8 };
l_warptile = { 512, 128, 128, 16, mm_warp_8, 32, 2, tm_m, tn_m, tk_m, mm_warp_8 };
l_warptile_mmq = { 512, 128, 128, 32, mm_warp_8, 32, 2, tm_m, tn_m, tk_m, mm_warp_8 };
}
l_mmq_wg_denoms = l_wg_denoms = {128, 128, 1 };
@@ -5174,8 +5180,8 @@ static void ggml_vk_load_shaders(vk_device& device, vk_pipeline requested) {
const uint32_t s_warptile_wm = device->subgroup_size == 8 ? 8 : 32;
// use scalar tile sizes
l_warptile = { 128, 128, 128, 16, subgroup_size_8 * 2, 64, 2, 4, 4, 1, subgroup_size_8 };
m_warptile = { 128, 64, 64, 16, subgroup_size_8, 32, 2, 4, 2, 1, subgroup_size_8 };
l_warptile = { 128, 128, 128, 16, mm_warp_8 * 2, 64, 2, 4, 4, 1, mm_warp_8 };
m_warptile = { 128, 64, 64, 16, mm_warp_8, 32, 2, 4, 2, 1, mm_warp_8 };
s_warptile = { subgroup_size_32, 32, 32, 16, s_warptile_wm, 32, 2, 2, 2, 1, subgroup_size_8 };
l_wg_denoms = {128, 128, 1 };