From 77a73403ca8eaced2590559d0f9cebd2b3649d32 Mon Sep 17 00:00:00 2001 From: Georgi Gerganov Date: Tue, 18 Apr 2023 23:54:57 +0300 Subject: [PATCH] ggml : add new Q4_2 quantization (ARM only) (#1046) * ggml : Q4_2 ARM * ggml : add ggml_is_quantized() * llama : update llama_type_name() with Q4_2 entry * ggml : speed-up q4_2 - 4 threads: ~100ms -> ~90ms - 8 threads: ~55ms -> ~50ms * ggml : optimize q4_2 using vmlaq_n_f32 + vmulq_n_f32 --- examples/quantize/quantize.cpp | 1 + ggml.c | 282 +++++++++++++++++++++++++++++++-- ggml.h | 4 +- llama.cpp | 10 +- llama.h | 1 + 5 files changed, 287 insertions(+), 11 deletions(-) diff --git a/examples/quantize/quantize.cpp b/examples/quantize/quantize.cpp index 5c9e2ad94..59cb67440 100644 --- a/examples/quantize/quantize.cpp +++ b/examples/quantize/quantize.cpp @@ -14,6 +14,7 @@ int main(int argc, char ** argv) { fprintf(stderr, "usage: %s model-f32.bin model-quant.bin type\n", argv[0]); fprintf(stderr, " type = %d - q4_0\n", LLAMA_FTYPE_MOSTLY_Q4_0); fprintf(stderr, " type = %d - q4_1\n", LLAMA_FTYPE_MOSTLY_Q4_1); + fprintf(stderr, " type = %d - q4_2\n", LLAMA_FTYPE_MOSTLY_Q4_2); return 1; } diff --git a/ggml.c b/ggml.c index 5fcb81cb8..40a9d0b2f 100644 --- a/ggml.c +++ b/ggml.c @@ -585,6 +585,13 @@ typedef struct { } block_q4_1; static_assert(sizeof(block_q4_1) == sizeof(float) * 2 + QK4_1 / 2, "wrong q4_1 block size/padding"); +#define QK4_2 16 +typedef struct { + ggml_fp16_t d; // delta + uint8_t qs[QK4_2 / 2]; // nibbles / quants +} block_q4_2; +static_assert(sizeof(block_q4_2) == sizeof(ggml_fp16_t) + QK4_2 / 2, "wrong q4_2 block size/padding"); + #define QK8_0 32 typedef struct { float d; // delta @@ -1045,6 +1052,49 @@ static void quantize_row_q4_1(const float * restrict x, void * restrict vy, int #endif } +// reference implementation for deterministic creation of model files +static void quantize_row_q4_2_reference(const float * restrict x, block_q4_2 * restrict y, int k) { + assert(k % QK4_2 == 0); + + const int nb = k / QK4_2; + + for (int i = 0; i < nb; i++) { + float amax = 0.0f; // absolute max + + for (int l = 0; l < QK4_2; l++) { + const float v = x[i*QK4_2 + l]; + amax = MAX(amax, fabsf(v)); + } + + const float d = amax / ((1 << 3) - 1); + + const float id = d ? 1.0f/d : 0.0f; + + y[i].d = GGML_FP32_TO_FP16(d); + + for (int l = 0; l < QK4_2; l += 2) { + const float v0 = x[i*QK4_2 + l + 0]*id; + const float v1 = x[i*QK4_2 + l + 1]*id; + + const uint8_t vi0 = (uint8_t)(v0 + 8.5f); + const uint8_t vi1 = (uint8_t)(v1 + 8.5f); + + assert(vi0 < 16); + assert(vi1 < 16); + + y[i].qs[l/2] = vi0 | (vi1 << 4); + } + } +} + +static void quantize_row_q4_2(const float * restrict x, void * restrict vy, int k) { + assert(k % QK4_2 == 0); + + block_q4_2 * restrict y = vy; + + quantize_row_q4_2_reference(x, y, k); +} + // reference implementation for deterministic creation of model files static void quantize_row_q8_0_reference(const float * restrict x, block_q8_0 * restrict y, int k) { assert(k % QK8_0 == 0); @@ -1064,7 +1114,7 @@ static void quantize_row_q8_0_reference(const float * restrict x, block_q8_0 * r y[i].d = d; for (int l = 0; l < QK8_0; ++l) { - const float v = x[i*QK8_0 + l]*id; + const float v = x[i*QK8_0 + l]*id; y[i].qs[l] = roundf(v); } } @@ -1420,8 +1470,39 @@ static void dequantize_row_q4_1(const void * restrict vx, float * restrict y, in #endif } +static void dequantize_row_q4_2(const void * restrict vx, float * restrict y, int k) { + assert(k % QK4_2 == 0); + const int nb = k / QK4_2; + + const block_q4_2 * restrict x = vx; + + for (int i = 0; i < nb; i++) { + const float d = GGML_FP16_TO_FP32(x[i].d); + + const uint8_t * restrict pp = x[i].qs; + + for (int l = 0; l < QK4_2; l += 2) { + const uint8_t vi = pp[l/2]; + + const int8_t vi0 = vi & 0xf; + const int8_t vi1 = vi >> 4; + + const float v0 = (vi0 - 8)*d; + const float v1 = (vi1 - 8)*d; + + y[i*QK4_2 + l + 0] = v0; + y[i*QK4_2 + l + 1] = v1; + + assert(!isnan(y[i*QK4_2 + l + 0])); + assert(!isnan(y[i*QK4_2 + l + 1])); + } + } +} + static void ggml_vec_dot_q4_1(const int n, float * restrict s, const void * restrict vx, const void * restrict vy); static void ggml_vec_dot_q4_0_q8_0(const int n, float * restrict s, const void * restrict vx, const void * restrict vy); +//static void ggml_vec_dot_q4_1_q8_0(const int n, float * restrict s, const void * restrict vx, const void * restrict vy); +static void ggml_vec_dot_q4_2_q8_0(const int n, float * restrict s, const void * restrict vx, const void * restrict vy); static const quantize_fns_t quantize_fns[GGML_TYPE_COUNT] = { [GGML_TYPE_Q4_0] = { @@ -1438,6 +1519,13 @@ static const quantize_fns_t quantize_fns[GGML_TYPE_COUNT] = { .quantize_row_q_dot = quantize_row_q4_1, .vec_dot_q = ggml_vec_dot_q4_1, }, + [GGML_TYPE_Q4_2] = { + .dequantize_row_q = dequantize_row_q4_2, + .quantize_row_q = quantize_row_q4_2, + .quantize_row_q_reference = (quantize_row_q_t) quantize_row_q4_2_reference, + .quantize_row_q_dot = quantize_row_q8_0, + .vec_dot_q = ggml_vec_dot_q4_2_q8_0, + }, // TODO: GGML_TYPE_Q8_0 }; @@ -2950,6 +3038,136 @@ static void ggml_vec_dot_q4_0_q8_0(const int n, float * restrict s, const void * *s = sumf; } +static void ggml_vec_dot_q4_2_q8_0(const int n, float * restrict s, const void * restrict vx, const void * restrict vy) { + const int nb = n / QK8_0; + + assert(n % QK8_0 == 0); + assert(nb % 2 == 0); + assert(QK8_0 == 2*QK4_2); + + const block_q4_2 * restrict x = vx; + const block_q8_0 * restrict y = vy; + + float sumf = 0.0; + +#if defined(__ARM_NEON) + float32x4_t sumv0 = vdupq_n_f32(0.0f); + float32x4_t sumv1 = vdupq_n_f32(0.0f); + + for (int i = 0; i < nb; i += 2) { + const block_q4_2 * restrict x0_0 = &x[2*(i + 0) + 0]; + const block_q4_2 * restrict x0_1 = &x[2*(i + 0) + 1]; + const block_q4_2 * restrict x1_0 = &x[2*(i + 1) + 0]; + const block_q4_2 * restrict x1_1 = &x[2*(i + 1) + 1]; + const block_q8_0 * restrict y0 = &y[i + 0]; + const block_q8_0 * restrict y1 = &y[i + 1]; + + const uint8x16_t m4b = vdupq_n_u8(0xf); + const int8x16_t s8b = vdupq_n_s8(0x8); + + const uint8x16_t v0_0 = vcombine_u8(vld1_u8(x0_0->qs), vld1_u8(x0_1->qs)); + const uint8x16_t v0_1 = vcombine_u8(vld1_u8(x1_0->qs), vld1_u8(x1_1->qs)); + + // 4-bit -> 8-bit + const int8x16_t v0_0l = vreinterpretq_s8_u8(vandq_u8 (v0_0, m4b)); + const int8x16_t v0_0h = vreinterpretq_s8_u8(vshrq_n_u8(v0_0, 4)); + const int8x16_t v0_1l = vreinterpretq_s8_u8(vandq_u8 (v0_1, m4b)); + const int8x16_t v0_1h = vreinterpretq_s8_u8(vshrq_n_u8(v0_1, 4)); + + // sub 8 + const int8x16_t v0_0ls = vsubq_s8(v0_0l, s8b); + const int8x16_t v0_0hs = vsubq_s8(v0_0h, s8b); + const int8x16_t v0_1ls = vsubq_s8(v0_1l, s8b); + const int8x16_t v0_1hs = vsubq_s8(v0_1h, s8b); + + // interleave + const int8x16_t v0_0lz = vzip1q_s8(v0_0ls, v0_0hs); + const int8x16_t v0_0hz = vzip2q_s8(v0_0ls, v0_0hs); + const int8x16_t v0_1lz = vzip1q_s8(v0_1ls, v0_1hs); + const int8x16_t v0_1hz = vzip2q_s8(v0_1ls, v0_1hs); + + // load y + const int8x16_t v1_0l = vld1q_s8(y0->qs); + const int8x16_t v1_0h = vld1q_s8(y0->qs + 16); + const int8x16_t v1_1l = vld1q_s8(y1->qs); + const int8x16_t v1_1h = vld1q_s8(y1->qs + 16); + +#if defined(__ARM_FEATURE_DOTPROD) + sumv0 = vmlaq_n_f32(sumv0, vaddq_f32( + vmulq_n_f32(vcvtq_f32_s32(vdotq_s32(vdupq_n_s32(0), v0_0lz, v1_0l)), GGML_FP16_TO_FP32(x0_0->d)), + vmulq_n_f32(vcvtq_f32_s32(vdotq_s32(vdupq_n_s32(0), v0_0hz, v1_0h)), GGML_FP16_TO_FP32(x0_1->d))), y0->d); + + sumv1 = vmlaq_n_f32(sumv1, vaddq_f32( + vmulq_n_f32(vcvtq_f32_s32(vdotq_s32(vdupq_n_s32(0), v0_1lz, v1_1l)), GGML_FP16_TO_FP32(x1_0->d)), + vmulq_n_f32(vcvtq_f32_s32(vdotq_s32(vdupq_n_s32(0), v0_1hz, v1_1h)), GGML_FP16_TO_FP32(x1_1->d))), y1->d); +#else + const int16x8_t pl0l = vmull_s8(vget_low_s8 (v0_0lz), vget_low_s8 (v1_0l)); + const int16x8_t pl0h = vmull_s8(vget_high_s8(v0_0lz), vget_high_s8(v1_0l)); + const int16x8_t ph0l = vmull_s8(vget_low_s8 (v0_0hz), vget_low_s8 (v1_0h)); + const int16x8_t ph0h = vmull_s8(vget_high_s8(v0_0hz), vget_high_s8(v1_0h)); + + const int16x8_t pl1l = vmull_s8(vget_low_s8 (v0_1lz), vget_low_s8 (v1_1l)); + const int16x8_t pl1h = vmull_s8(vget_high_s8(v0_1lz), vget_high_s8(v1_1l)); + const int16x8_t ph1l = vmull_s8(vget_low_s8 (v0_1hz), vget_low_s8 (v1_1h)); + const int16x8_t ph1h = vmull_s8(vget_high_s8(v0_1hz), vget_high_s8(v1_1h)); + + const int32x4_t pl0 = vaddq_s32(vpaddlq_s16(pl0l), vpaddlq_s16(pl0h)); + const int32x4_t ph0 = vaddq_s32(vpaddlq_s16(ph0l), vpaddlq_s16(ph0h)); + const int32x4_t pl1 = vaddq_s32(vpaddlq_s16(pl1l), vpaddlq_s16(pl1h)); + const int32x4_t ph1 = vaddq_s32(vpaddlq_s16(ph1l), vpaddlq_s16(ph1h)); + + sumv0 = vmlaq_n_f32(sumv0, vaddq_f32( + vmulq_n_f32(vcvtq_f32_s32(pl0), GGML_FP16_TO_FP32(x0_0->d)), + vmulq_n_f32(vcvtq_f32_s32(ph0), GGML_FP16_TO_FP32(x0_1->d))), y0->d); + + sumv1 = vmlaq_n_f32(sumv1, vaddq_f32( + vmulq_n_f32(vcvtq_f32_s32(pl1), GGML_FP16_TO_FP32(x1_0->d)), + vmulq_n_f32(vcvtq_f32_s32(ph1), GGML_FP16_TO_FP32(x1_1->d))), y1->d); +#endif + } + + sumf = vaddvq_f32(sumv0) + vaddvq_f32(sumv1); +#else + // scalar + for (int i = 0; i < nb; i++) { + const uint8_t * restrict x0 = x[2*i + 0].qs; + const uint8_t * restrict x1 = x[2*i + 1].qs; + const int8_t * restrict y0 = y[i].qs; + + const float d0 = GGML_FP16_TO_FP32(x[2*i + 0].d); + const float d1 = GGML_FP16_TO_FP32(x[2*i + 1].d); + + int sumi_0 = 0; + int sumi_1 = 0; + + for (int j = 0; j < QK8_0/4; j++) { + const uint8_t v0 = x0[j]; + const uint8_t v1 = x1[j]; + + const int i0_0 = (int8_t) (v0 & 0xf) - 8; + const int i1_0 = (int8_t) (v0 >> 4) - 8; + + const int i0_1 = (int8_t) (v1 & 0xf) - 8; + const int i1_1 = (int8_t) (v1 >> 4) - 8; + + const int i2_0 = y0[2*j + 0]; + const int i3_0 = y0[2*j + 1]; + + const int i2_1 = y0[2*(j + QK8_0/4) + 0]; + const int i3_1 = y0[2*(j + QK8_0/4) + 1]; + + sumi_0 += i0_0*i2_0 + i1_0*i3_0; + sumi_1 += i0_1*i2_1 + i1_1*i3_1; + } + + sumf += (d0 * y[i].d) * sumi_0; + sumf += (d1 * y[i].d) * sumi_1; + } +#endif + + *s = sumf; +} + // compute GGML_VEC_DOT_UNROLL dot products at once // xs - x row stride in bytes inline static void ggml_vec_dot_f16_unroll(const int n, const int xs, float * restrict s, void * restrict xv, ggml_fp16_t * restrict y) { @@ -3196,24 +3414,26 @@ static const int GGML_BLCK_SIZE[GGML_TYPE_COUNT] = { [GGML_TYPE_F16] = 1, [GGML_TYPE_Q4_0] = QK4_0, [GGML_TYPE_Q4_1] = QK4_1, + [GGML_TYPE_Q4_2] = QK4_2, [GGML_TYPE_Q8_0] = QK8_0, [GGML_TYPE_I8] = 1, [GGML_TYPE_I16] = 1, [GGML_TYPE_I32] = 1, }; -static_assert(GGML_TYPE_COUNT == 8, "GGML_BLCK_SIZE is outdated"); +static_assert(GGML_TYPE_COUNT == 9, "GGML_BLCK_SIZE is outdated"); static const size_t GGML_TYPE_SIZE[GGML_TYPE_COUNT] = { [GGML_TYPE_F32] = sizeof(float), [GGML_TYPE_F16] = sizeof(ggml_fp16_t), [GGML_TYPE_Q4_0] = sizeof(block_q4_0), [GGML_TYPE_Q4_1] = sizeof(block_q4_1), + [GGML_TYPE_Q4_2] = sizeof(block_q4_2), [GGML_TYPE_Q8_0] = sizeof(block_q8_0), [GGML_TYPE_I8] = sizeof(int8_t), [GGML_TYPE_I16] = sizeof(int16_t), [GGML_TYPE_I32] = sizeof(int32_t), }; -static_assert(GGML_TYPE_COUNT == 8, "GGML_TYPE_SIZE is outdated"); +static_assert(GGML_TYPE_COUNT == 9, "GGML_TYPE_SIZE is outdated"); static const char * GGML_TYPE_NAME[GGML_TYPE_COUNT] = { @@ -3221,12 +3441,26 @@ static const char * GGML_TYPE_NAME[GGML_TYPE_COUNT] = { [GGML_TYPE_F16] = "f16", [GGML_TYPE_Q4_0] = "q4_0", [GGML_TYPE_Q4_1] = "q4_1", + [GGML_TYPE_Q4_2] = "q4_2", [GGML_TYPE_Q8_0] = "q8_0", [GGML_TYPE_I8] = "i8", [GGML_TYPE_I16] = "i16", [GGML_TYPE_I32] = "i32", }; -static_assert(GGML_TYPE_COUNT == 8, "GGML_TYPE_NAME is outdated"); +static_assert(GGML_TYPE_COUNT == 9, "GGML_TYPE_NAME is outdated"); + +static bool GGML_IS_QUANTIZED[GGML_TYPE_COUNT] = { + [GGML_TYPE_F32] = false, + [GGML_TYPE_F16] = false, + [GGML_TYPE_Q4_0] = true, + [GGML_TYPE_Q4_1] = true, + [GGML_TYPE_Q4_2] = true, + [GGML_TYPE_Q8_0] = true, + [GGML_TYPE_I8] = false, + [GGML_TYPE_I16] = false, + [GGML_TYPE_I32] = false, +}; +static_assert(GGML_TYPE_COUNT == 9, "GGML_IS_QUANTIZED is outdated"); static const char * GGML_OP_LABEL[GGML_OP_COUNT] = { "NONE", @@ -3488,6 +3722,10 @@ static inline bool ggml_can_mul_mat(const struct ggml_tensor * t0, const struct (t0->ne[3] == t1->ne[3]); } +static inline bool ggml_is_quantized(enum ggml_type type) { + return GGML_IS_QUANTIZED[type]; +} + static inline bool ggml_is_transposed(const struct ggml_tensor * tensor) { return tensor->nb[0] > tensor->nb[1]; } @@ -5609,7 +5847,7 @@ static void ggml_compute_forward_dup_f16( } } } - } else if (dst->type == GGML_TYPE_Q4_0 || dst->type == GGML_TYPE_Q4_1) { + } else if (ggml_is_quantized(dst->type)) { quantize_row_q_t const quantize_row_q = quantize_fns[dst->type].quantize_row_q; size_t id = 0; uint8_t * dst_ptr = (uint8_t *) dst->data; @@ -5821,7 +6059,7 @@ static void ggml_compute_forward_dup_f32( } } } - } else if (dst->type == GGML_TYPE_Q4_0 || dst->type == GGML_TYPE_Q4_1) { + } else if (ggml_is_quantized(dst->type)) { quantize_row_q_t const quantize_row_q = quantize_fns[dst->type].quantize_row_q; size_t id = 0; uint8_t * dst_ptr = (uint8_t *) dst->data; @@ -6184,7 +6422,7 @@ static void ggml_compute_forward_add_q_f32( GGML_ASSERT(nb1 <= nb2); GGML_ASSERT(nb2 <= nb3); - GGML_ASSERT(src0->type == GGML_TYPE_Q4_0 || src0->type == GGML_TYPE_Q4_1); + GGML_ASSERT(ggml_is_quantized(src0->type)); GGML_ASSERT(dst->type == src0->type); GGML_ASSERT(src1->type == GGML_TYPE_F32); @@ -6254,6 +6492,7 @@ static void ggml_compute_forward_add( } break; case GGML_TYPE_Q4_0: case GGML_TYPE_Q4_1: + case GGML_TYPE_Q4_2: { ggml_compute_forward_add_q_f32(params, src0, src1, dst); } break; @@ -7732,6 +7971,7 @@ static void ggml_compute_forward_mul_mat( switch (src0->type) { case GGML_TYPE_Q4_0: case GGML_TYPE_Q4_1: + case GGML_TYPE_Q4_2: case GGML_TYPE_Q8_0: { ggml_compute_forward_mul_mat_q_f32(params, src0, src1, dst); @@ -7987,6 +8227,7 @@ static void ggml_compute_forward_get_rows( switch (src0->type) { case GGML_TYPE_Q4_0: case GGML_TYPE_Q4_1: + case GGML_TYPE_Q4_2: case GGML_TYPE_Q8_0: { ggml_compute_forward_get_rows_q(params, src0, src1, dst); @@ -10398,7 +10639,7 @@ void ggml_graph_compute(struct ggml_context * ctx, struct ggml_cgraph * cgraph) node->n_tasks = 1; size_t cur = 0; - if (node->type == GGML_TYPE_Q4_0 || node->type == GGML_TYPE_Q4_1) { + if (ggml_is_quantized(node->type)) { cur = GGML_TYPE_SIZE[GGML_TYPE_F32] * node->ne[0]; } @@ -10410,7 +10651,7 @@ void ggml_graph_compute(struct ggml_context * ctx, struct ggml_cgraph * cgraph) size_t cur = 0; - if (node->src0->type == GGML_TYPE_Q4_0 || node->src0->type == GGML_TYPE_Q4_1) { + if (ggml_is_quantized(node->src0->type)) { cur = GGML_TYPE_SIZE[GGML_TYPE_F32] * node->src0->ne[0] * n_threads; } @@ -11702,6 +11943,29 @@ size_t ggml_quantize_q4_1(const float * src, void * dst, int n, int k, int64_t * return (n/QK4_1*sizeof(block_q4_1)); } +size_t ggml_quantize_q4_2(const float * src, void * dst, int n, int k, int64_t * hist) { + assert(k % QK4_2 == 0); + const int nb = k / QK4_2; + + for (int j = 0; j < n; j += k) { + block_q4_2 * restrict y = (block_q4_2 *)dst + j/QK4_2; + + quantize_row_q4_2_reference(src + j, y, k); + + for (int i = 0; i < nb; i++) { + for (int l = 0; l < QK4_2; l += 2) { + const uint8_t vi0 = y[i].qs[l/2] & 0xF; + const uint8_t vi1 = y[i].qs[l/2] >> 4; + + hist[vi0]++; + hist[vi1]++; + } + } + } + + return (n/QK4_2*sizeof(block_q4_2)); +} + //////////////////////////////////////////////////////////////////////////////// int ggml_cpu_has_avx(void) { diff --git a/ggml.h b/ggml.h index 59de0cb12..603be8453 100644 --- a/ggml.h +++ b/ggml.h @@ -204,7 +204,8 @@ enum ggml_type { GGML_TYPE_F16 = 1, GGML_TYPE_Q4_0 = 2, GGML_TYPE_Q4_1 = 3, - GGML_TYPE_Q8_0 = 4, + GGML_TYPE_Q4_2 = 4, + GGML_TYPE_Q8_0 = 5, GGML_TYPE_I8, GGML_TYPE_I16, GGML_TYPE_I32, @@ -806,6 +807,7 @@ enum ggml_opt_result ggml_opt( size_t ggml_quantize_q4_0(const float * src, void * dst, int n, int k, int64_t * hist); size_t ggml_quantize_q4_1(const float * src, void * dst, int n, int k, int64_t * hist); +size_t ggml_quantize_q4_2(const float * src, void * dst, int n, int k, int64_t * hist); // // system info diff --git a/llama.cpp b/llama.cpp index db71c03bd..f14324fcd 100644 --- a/llama.cpp +++ b/llama.cpp @@ -478,6 +478,7 @@ struct llama_file_loader { case GGML_TYPE_F16: case GGML_TYPE_Q4_0: case GGML_TYPE_Q4_1: + case GGML_TYPE_Q4_2: break; default: { throw format("unrecognized tensor type %u\n", shard.type); @@ -550,6 +551,7 @@ struct llama_file_saver { case GGML_TYPE_F16: case GGML_TYPE_Q4_0: case GGML_TYPE_Q4_1: + case GGML_TYPE_Q4_2: break; default: LLAMA_ASSERT(false); } @@ -838,6 +840,7 @@ static const char *llama_ftype_name(enum llama_ftype ftype) { case LLAMA_FTYPE_MOSTLY_Q4_1: return "mostly Q4_1"; case LLAMA_FTYPE_MOSTLY_Q4_1_SOME_F16: return "mostly Q4_1, some F16"; + case LLAMA_FTYPE_MOSTLY_Q4_2: return "mostly Q4_2"; default: return "unknown, may not work"; } } @@ -1571,6 +1574,7 @@ static void llama_model_quantize_internal(const std::string & fname_inp, const s switch (ftype) { case LLAMA_FTYPE_MOSTLY_Q4_0: quantized_type = GGML_TYPE_Q4_0; break; case LLAMA_FTYPE_MOSTLY_Q4_1: quantized_type = GGML_TYPE_Q4_1; break; + case LLAMA_FTYPE_MOSTLY_Q4_2: quantized_type = GGML_TYPE_Q4_2; break; default: throw format("invalid output file type %d\n", ftype); }; @@ -1644,6 +1648,10 @@ static void llama_model_quantize_internal(const std::string & fname_inp, const s { new_size = ggml_quantize_q4_1(f32_data, new_data, nelements, (int) tensor.ne.at(0), hist_cur.data()); } break; + case GGML_TYPE_Q4_2: + { + new_size = ggml_quantize_q4_2(f32_data, new_data, nelements, (int) tensor.ne.at(0), hist_cur.data()); + } break; default: LLAMA_ASSERT(false); } @@ -1955,7 +1963,7 @@ int llama_apply_lora_from_file_internal(struct llama_context * ctx, const char * base_t = dest_t; } - if (base_t->type == GGML_TYPE_Q4_0 || base_t->type == GGML_TYPE_Q4_1) { + if (base_t->type == GGML_TYPE_Q4_0 || base_t->type == GGML_TYPE_Q4_1 || base_t->type == GGML_TYPE_Q4_2) { if (!warned) { fprintf(stderr, "%s: warning: using a lora adapter with a quantized model may result in poor quality, " "use a f16 or f32 base model with --lora-base\n", __func__); diff --git a/llama.h b/llama.h index c35193a8a..208b03d18 100644 --- a/llama.h +++ b/llama.h @@ -72,6 +72,7 @@ extern "C" { LLAMA_FTYPE_MOSTLY_Q4_0 = 2, // except 1d tensors LLAMA_FTYPE_MOSTLY_Q4_1 = 3, // except 1d tensors LLAMA_FTYPE_MOSTLY_Q4_1_SOME_F16 = 4, // tok_embeddings.weight and output.weight are F16 + LLAMA_FTYPE_MOSTLY_Q4_2 = 5, // except 1d tensors }; LLAMA_API struct llama_context_params llama_context_default_params();