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vulkan: matmul dequantization improvements (#12015)

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* faster dequant for old quants

* dont use unpack for iq4_nl

* vec2 unpack for q8
This commit is contained in:
Eve
2025-02-28 07:20:08 +00:00
committed by GitHub
parent 581650b7ca
commit fbeda9002d
5 changed files with 93 additions and 53 deletions
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6
ggml/src/ggml-vulkan/vulkan-shaders/dequant_funcs.comp
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@ -82,9 +82,9 @@ vec2 dequantize(uint ib, uint iqs, uint a_offset) {
return vec2(int(data_a[a_offset + ib].qs[iqs]), int(data_a[a_offset + ib].qs[iqs + 1]));
}
vec4 dequantize4(uint ib, uint iqs, uint a_offset) {
uint32_t v0 = data_a_packed16[a_offset + ib].qs[iqs/2];
uint32_t v1 = data_a_packed16[a_offset + ib].qs[iqs/2 + 1];
return vec4(int8_t(v0 & 0xFF), int8_t(v0 >> 8), int8_t(v1 & 0xFF), int8_t(v1 >> 8));
const i8vec2 v0 = unpack8(data_a_packed16[a_offset + ib].qs[iqs/2]);
const i8vec2 v1 = unpack8(data_a_packed16[a_offset + ib].qs[iqs/2 + 1]);
return vec4(v0.x, v0.y, v1.x, v1.y);
}
#endif

2
ggml/src/ggml-vulkan/vulkan-shaders/dequant_funcs_cm2.comp
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@ -92,7 +92,7 @@ float16_t dequantFuncQ8_0(const in decodeBufQ8_0 bl, const in uint blockCoords[2
const uint iqs = idx;
// Load 16b and select the byte for this element
int32_t qs = unpack8(int32_t(bl.block.qs[(iqs & 0x1E) >> 1]))[iqs & 1];
int32_t qs = unpack8(bl.block.qs[(iqs & 0x1E) >> 1])[iqs & 1];
float16_t ret = float16_t(qs) * d;
return ret;
}

126
ggml/src/ggml-vulkan/vulkan-shaders/mul_mm.comp
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@ -32,6 +32,13 @@
layout(local_size_x_id = 0, local_size_y = 1, local_size_z = 1) in;
layout (binding = 0) readonly buffer A {A_TYPE data_a[];};
#if defined(A_TYPE_PACKED16)
layout (binding = 0) readonly buffer A_PACKED16 {A_TYPE_PACKED16 data_a_packed16[];};
#endif
#if defined(A_TYPE_PACKED32)
layout (binding = 0) readonly buffer A_PACKED32 {A_TYPE_PACKED32 data_a_packed32[];};
#endif
layout (binding = 1) readonly buffer B {B_TYPE data_b[];};
layout (binding = 2) writeonly buffer D {D_TYPE data_d[];};
@ -243,74 +250,100 @@ void main() {
#endif
#elif defined(DATA_A_Q4_0)
const uint idx = pos_a + (loadc_a + l) * p.stride_a / LOAD_VEC_A + loadr_a;
const uint buf_idx = (loadc_a + l) * SHMEM_STRIDE + loadr_a;
const uint buf_idx = (loadc_a + l) * SHMEM_STRIDE + 4 * loadr_a;
const uint ib = idx / 16;
const uint iqs = idx & 0xF;
const uint ib = idx / 4;
const uint iqs = idx & 0x03;
const float d = float(data_a[ib].d);
const uint vui = uint(data_a[ib].qs[iqs]);
const vec2 v = (vec2(vui & 0xF, vui >> 4) - 8.0f) * d;
const float d = float(data_a_packed16[ib].d);
const uint vui = uint(data_a_packed16[ib].qs[2*iqs]) | (uint(data_a_packed16[ib].qs[2*iqs + 1]) << 16);
const vec4 v0 = (vec4(unpack8(vui & 0x0F0F0F0F)) - 8.0f) * d;
const vec4 v1 = (vec4(unpack8((vui >> 4) & 0x0F0F0F0F)) - 8.0f) * d;
buf_a[buf_idx ] = FLOAT_TYPE(v.x);
buf_a[buf_idx + 16] = FLOAT_TYPE(v.y);
buf_a[buf_idx ] = FLOAT_TYPE(v0.x);
buf_a[buf_idx + 1 ] = FLOAT_TYPE(v0.y);
buf_a[buf_idx + 2 ] = FLOAT_TYPE(v0.z);
buf_a[buf_idx + 3 ] = FLOAT_TYPE(v0.w);
buf_a[buf_idx + 16] = FLOAT_TYPE(v1.x);
buf_a[buf_idx + 17] = FLOAT_TYPE(v1.y);
buf_a[buf_idx + 18] = FLOAT_TYPE(v1.z);
buf_a[buf_idx + 19] = FLOAT_TYPE(v1.w);
#elif defined(DATA_A_Q4_1)
const uint idx = pos_a + (loadc_a + l) * p.stride_a / LOAD_VEC_A + loadr_a;
const uint buf_idx = (loadc_a + l) * SHMEM_STRIDE + loadr_a;
const uint buf_idx = (loadc_a + l) * SHMEM_STRIDE + 4 * loadr_a;
const uint ib = idx / 16;
const uint iqs = idx & 0xF;
const uint ib = idx / 4;
const uint iqs = idx & 0x03;
const float d = float(data_a[ib].d);
const float m = float(data_a[ib].m);
const uint vui = uint(data_a[ib].qs[iqs]);
const vec2 v = vec2(vui & 0xF, vui >> 4) * d + m;
const float d = float(data_a_packed16[ib].d);
const float m = float(data_a_packed16[ib].m);
const uint vui = uint(data_a_packed16[ib].qs[2*iqs]) | (uint(data_a_packed16[ib].qs[2*iqs + 1]) << 16);
const vec4 v0 = vec4(unpack8(vui & 0x0F0F0F0F)) * d + m;
const vec4 v1 = vec4(unpack8((vui >> 4) & 0x0F0F0F0F)) * d + m;
buf_a[buf_idx ] = FLOAT_TYPE(v.x);
buf_a[buf_idx + 16] = FLOAT_TYPE(v.y);
buf_a[buf_idx ] = FLOAT_TYPE(v0.x);
buf_a[buf_idx + 1 ] = FLOAT_TYPE(v0.y);
buf_a[buf_idx + 2 ] = FLOAT_TYPE(v0.z);
buf_a[buf_idx + 3 ] = FLOAT_TYPE(v0.w);
buf_a[buf_idx + 16] = FLOAT_TYPE(v1.x);
buf_a[buf_idx + 17] = FLOAT_TYPE(v1.y);
buf_a[buf_idx + 18] = FLOAT_TYPE(v1.z);
buf_a[buf_idx + 19] = FLOAT_TYPE(v1.w);
#elif defined(DATA_A_Q5_0)
const uint idx = pos_a + (loadc_a + l) * p.stride_a / LOAD_VEC_A + loadr_a;
const uint buf_idx = (loadc_a + l) * SHMEM_STRIDE + loadr_a;
const uint buf_idx = (loadc_a + l) * SHMEM_STRIDE + 2 * loadr_a;
const uint ib = idx / 16;
const uint iqs = idx & 0xF;
const uint ib = idx / 8;
const uint iqs = idx & 0x07;
const float d = float(data_a[ib].d);
const uint uint_qh = uint(data_a[ib].qh[1]) << 16 | data_a[ib].qh[0];
const ivec2 qh = ivec2(((uint_qh >> iqs) << 4) & 0x10, (uint_qh >> (iqs + 12)) & 0x10);
const uint vui = uint(data_a[ib].qs[iqs]);
const vec2 v = (vec2((vui & 0xF) | qh.x, (vui >> 4) | qh.y) - 16.0f) * d;
const float d = float(data_a_packed16[ib].d);
const uint uint_qh = uint(data_a_packed16[ib].qh[1]) << 16 | uint(data_a_packed16[ib].qh[0]);
const ivec2 qh0 = ivec2(((uint_qh >> 2*iqs) << 4) & 0x10, (uint_qh >> (2*iqs + 12)) & 0x10);
const ivec2 qh1 = ivec2(((uint_qh >> (2*iqs + 1)) << 4) & 0x10, (uint_qh >> (2*iqs + 13)) & 0x10);
const uint vui = uint(data_a_packed16[ib].qs[iqs]);
const vec4 v = (vec4((vui & 0xF) | qh0.x, ((vui >> 4) & 0xF) | qh0.y, ((vui >> 8) & 0xF) | qh1.x, (vui >> 12) | qh1.y) - 16.0f) * d;
buf_a[buf_idx ] = FLOAT_TYPE(v.x);
buf_a[buf_idx + 1 ] = FLOAT_TYPE(v.z);
buf_a[buf_idx + 16] = FLOAT_TYPE(v.y);
buf_a[buf_idx + 17] = FLOAT_TYPE(v.w);
#elif defined(DATA_A_Q5_1)
const uint idx = pos_a + (loadc_a + l) * p.stride_a / LOAD_VEC_A + loadr_a;
const uint buf_idx = (loadc_a + l) * SHMEM_STRIDE + loadr_a;
const uint buf_idx = (loadc_a + l) * SHMEM_STRIDE + 2 * loadr_a;
const uint ib = idx / 16;
const uint iqs = idx & 0xF;
const uint ib = idx / 8;
const uint iqs = idx & 0x07;
const float d = float(data_a[ib].d);
const float m = float(data_a[ib].m);
const uint uint_qh = data_a[ib].qh;
const ivec2 qh = ivec2(((uint_qh >> iqs) << 4) & 0x10, (uint_qh >> (iqs + 12)) & 0x10);
const uint vui = uint(data_a[ib].qs[iqs]);
const vec2 v = vec2((vui & 0xF) | qh.x, (vui >> 4) | qh.y) * d + m;
const float d = float(data_a_packed16[ib].d);
const float m = float(data_a_packed16[ib].m);
const uint uint_qh = data_a_packed16[ib].qh;
const ivec2 qh0 = ivec2(((uint_qh >> 2*iqs) << 4) & 0x10, (uint_qh >> (2*iqs + 12)) & 0x10);
const ivec2 qh1 = ivec2(((uint_qh >> (2*iqs + 1)) << 4) & 0x10, (uint_qh >> (2*iqs + 13)) & 0x10);
const uint vui = uint(data_a_packed16[ib].qs[iqs]);
const vec4 v = vec4((vui & 0xF) | qh0.x, ((vui >> 4) & 0xF) | qh0.y, ((vui >> 8) & 0xF) | qh1.x, (vui >> 12) | qh1.y) * d + m;
buf_a[buf_idx ] = FLOAT_TYPE(v.x);
buf_a[buf_idx + 1 ] = FLOAT_TYPE(v.z);
buf_a[buf_idx + 16] = FLOAT_TYPE(v.y);
buf_a[buf_idx + 17] = FLOAT_TYPE(v.w);
#elif defined(DATA_A_Q8_0)
const uint idx = pos_a + (loadc_a + l) * p.stride_a / LOAD_VEC_A + loadr_a;
const uint buf_idx = (loadc_a + l) * SHMEM_STRIDE + loadr_a * LOAD_VEC_A;
const uint ib = idx / 16;
const uint iqs = (idx & 0xF) * 2;
const uint ib = idx / 8;
const uint iqs = idx & 0x07;
const float d = float(data_a[ib].d);
const vec2 v = vec2(int(data_a[ib].qs[iqs]), int(data_a[ib].qs[iqs + 1])) * d;
const float d = float(data_a_packed16[ib].d);
const i8vec2 v0 = unpack8(data_a_packed16[ib].qs[2*iqs]);
const i8vec2 v1 = unpack8(data_a_packed16[ib].qs[2*iqs + 1]);
const vec4 v = vec4(v0.x, v0.y, v1.x, v1.y) * d;
buf_a[buf_idx ] = FLOAT_TYPE(v.x);
buf_a[buf_idx + 1] = FLOAT_TYPE(v.y);
buf_a[buf_idx + 2] = FLOAT_TYPE(v.z);
buf_a[buf_idx + 3] = FLOAT_TYPE(v.w);
#elif defined(DATA_A_Q2_K)
const uint idx = pos_a + (loadc_a + l) * p.stride_a / LOAD_VEC_A + loadr_a;
const uint buf_idx = (loadc_a + l) * SHMEM_STRIDE + loadr_a * LOAD_VEC_A;
@ -623,17 +656,18 @@ void main() {
buf_a[buf_idx + 1] = FLOAT_TYPE(v.y);
#elif defined(DATA_A_IQ4_NL)
const uint idx = pos_a + (loadc_a + l) * p.stride_a / LOAD_VEC_A + loadr_a;
const uint buf_idx = (loadc_a + l) * SHMEM_STRIDE + loadr_a;
const uint buf_idx = (loadc_a + l) * SHMEM_STRIDE + 2 * loadr_a;
const uint ib = idx / 16;
const uint iqs = idx & 0xF;
const uint ib = idx / 8;
const uint iqs = idx & 0x07;
const float d = float(data_a[ib].d);
const uint vui = uint(data_a[ib].qs[iqs]);
const vec2 v = vec2(kvalues_iq4nl[vui & 0xF], kvalues_iq4nl[vui >> 4]) * d;
const FLOAT_TYPE d = FLOAT_TYPE(data_a_packed16[ib].d);
const uint vui = uint(data_a_packed16[ib].qs[iqs]);
buf_a[buf_idx ] = FLOAT_TYPE(v.x);
buf_a[buf_idx + 16] = FLOAT_TYPE(v.y);
buf_a[buf_idx ] = FLOAT_TYPE(kvalues_iq4nl[vui & 0xF]) * d;
buf_a[buf_idx + 1 ] = FLOAT_TYPE(kvalues_iq4nl[bitfieldExtract(vui, 8, 4)]) * d;
buf_a[buf_idx + 16] = FLOAT_TYPE(kvalues_iq4nl[bitfieldExtract(vui, 4, 4)]) * d;
buf_a[buf_idx + 17] = FLOAT_TYPE(kvalues_iq4nl[vui >> 12]) * d;
#endif
}
[[unroll]] for (uint l = 0; l < BN; l += loadstride_b) {

2
ggml/src/ggml-vulkan/vulkan-shaders/types.comp
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@ -139,7 +139,7 @@ struct block_q8_0
struct block_q8_0_packed16
{
float16_t d;
uint16_t qs[32/2];
int16_t qs[32/2];
};
#if defined(DATA_A_Q8_0)

10
ggml/src/ggml-vulkan/vulkan-shaders/vulkan-shaders-gen.cpp
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@ -325,11 +325,17 @@ void matmul_shaders(bool fp16, bool matmul_id, bool coopmat, bool coopmat2, bool
string_to_spv(shader_name + "_f16", source_name, merge_maps(base_dict, {{"DATA_A_F16", "1"}, {"B_TYPE", "float16_t"}, {"D_TYPE", "float"}}), fp16, coopmat, coopmat2, f16acc);
for (const auto& tname : type_names) {
std::string load_vec_quant = "2";
if ((tname == "q4_0") || (tname == "q4_1"))
load_vec_quant = "8";
else if ((tname == "q5_0") || (tname == "q5_1") || (tname == "q8_0") || (tname == "iq4_nl"))
load_vec_quant = "4";
std::string data_a_key = "DATA_A_" + to_uppercase(tname);
// For unaligned, load one at a time for f32/f16, or two at a time for quants
std::string load_vec_a_unaligned = (coopmat2 || tname == "f32" || tname == "f16") ? "1" : "2";
std::string load_vec_a_unaligned = (coopmat2 || tname == "f32" || tname == "f16") ? "1" : load_vec_quant;
// For aligned matmul loads
std::string load_vec_a = (coopmat2 || tname == "f32" || tname == "f16") ? load_vec : "2";
std::string load_vec_a = (coopmat2 || tname == "f32" || tname == "f16") ? load_vec : load_vec_quant;
// don't generate f32 variants for coopmat2
if (!coopmat2) {