extern/whisper.cpp
1
0
Fork 1
mirror of https://github.com/ggerganov/whisper.cpp.git synced 2025-02-04 12:29:28 +01:00
Code Issues Packages Projects Releases Wiki Activity

ggml : fix quants nans when all the group weights are very close to zero (llama/7313)

Browse Source
This commit is contained in:
slaren 2024-05-18 02:39:54 +02:00 committed by Georgi Gerganov
parent ec52f900e4
commit 2bc6483299
1 changed files with 18 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
ggml-quants.c
View File

@ -14,6 +14,12 @@
#include <stdlib.h> // for qsort
#include <stdio.h> // for GGML_ASSERT
#define GROUP_MAX_EPS 1e-15f
#define GROUP_MAX_EPS_IQ3_XXS 1e-8f
#define GROUP_MAX_EPS_IQ2_S 1e-8f
#define GROUP_MAX_EPS_IQ1_M 1e-7f
#define GROUP_MAX_EPS_IQ1_S 1e-12f
#if defined(_MSC_VER)
// disable "possible loss of data" to avoid warnings for hundreds of casts
// we should just be careful :)
@ -1109,7 +1115,7 @@ static float make_qx_quants(int n, int nmax, const float * restrict x, int8_t *
float ax = fabsf(x[i]);
if (ax > amax) { amax = ax; max = x[i]; }
}
if (amax < 1e-30f) { // all zero
if (amax < GROUP_MAX_EPS) { // all zero
for (int i = 0; i < n; ++i) {
L[i] = 0;
}
@ -1177,7 +1183,7 @@ static float make_q3_quants(int n, int nmax, const float * restrict x, int8_t *
float ax = fabsf(x[i]);
if (ax > amax) { amax = ax; max = x[i]; }
}
if (!amax) { // all zero
if (amax < GROUP_MAX_EPS) { // all zero
for (int i = 0; i < n; ++i) { L[i] = 0; }
return 0.f;
}
@ -1646,7 +1652,7 @@ static float make_qp_quants(int n, int nmax, const float * restrict x, uint8_t *
break;
}
}
return sumlx / suml2;
return sumlx/suml2;
}
static void quantize_row_q2_K_impl(const float * restrict x, block_q2_K * restrict y, int k, const float * restrict quant_weights) {
@ -2653,7 +2659,7 @@ void quantize_row_q6_K_reference(const float * restrict x, block_q6_K * restrict
}
if (!max_abs_scale) {
if (max_abs_scale < GROUP_MAX_EPS) {
memset(&y[i], 0, sizeof(block_q6_K));
y[i].d = GGML_FP32_TO_FP16(0.f);
x += QK_K;
@ -2805,7 +2811,7 @@ static void quantize_row_q6_K_impl(const float * restrict x, block_q6_K * restri
}
if (!max_abs_scale) {
if (max_abs_scale < GROUP_MAX_EPS) {
memset(&y[i], 0, sizeof(block_q6_K));
y[i].d = GGML_FP32_TO_FP16(0.f);
x += QK_K;
@ -12599,7 +12605,7 @@ static void quantize_row_iq2_xxs_impl(const float * restrict x, void * restrict
}
float max = xval[0];
for (int i = 1; i < 32; ++i) max = MAX(max, xval[i]);
if (!max) {
if (max < GROUP_MAX_EPS) {
scales[ib] = 0;
memset(L, 0, 32);
continue;
@ -12775,7 +12781,7 @@ static void quantize_row_iq2_xs_impl(const float * restrict x, void * restrict v
}
float max = xval[0];
for (int i = 1; i < 16; ++i) max = MAX(max, xval[i]);
if (!max) {
if (max < GROUP_MAX_EPS) {
scales[ib] = 0;
memset(L, 0, 16);
continue;
@ -13216,7 +13222,7 @@ static void quantize_row_iq3_xxs_impl(int grid_size, const float * restrict x, v
}
float max = xval[0];
for (int i = 1; i < 32; ++i) max = MAX(max, xval[i]);
if (!max) {
if (max < GROUP_MAX_EPS_IQ3_XXS) {
scales[ib] = 0;
memset(L, 0, 32);
continue;
@ -13756,7 +13762,7 @@ static void quantize_row_iq1_s_impl(const float * restrict x, void * restrict vy
for (int i = 0; i < block_size; ++i) weight[i] = qw[i] * sqrtf(sigma2 + xb[i]*xb[i]);
float max = fabsf(xb[0]);
for (int i = 1; i < block_size; ++i) max = MAX(max, fabsf(xb[i]));
if (!max) {
if (max < GROUP_MAX_EPS_IQ1_S) {
scales[ib] = 0;
memset(L, 1, block_size);
continue;
@ -13944,7 +13950,7 @@ static void quantize_row_iq1_m_impl(const float * restrict x, void * restrict vy
}
float max = fabsf(xb[0]);
for (int i = 1; i < block_size; ++i) max = MAX(max, fabsf(xb[i]));
if (!max) {
if (max < GROUP_MAX_EPS_IQ1_M) {
scales[ib] = 0;
memset(L, 1, block_size);
continue;
@ -14208,7 +14214,7 @@ static void quantize_row_iq4_nl_impl(const int super_block_size, const int block
amax = ax; max = xb[j];
}
}
if (!amax) {
if (amax < GROUP_MAX_EPS) {
scales[ib] = 0;
continue;
}
@ -14429,7 +14435,7 @@ static void quantize_row_iq2_s_impl(const float * restrict x, void * restrict vy
}
float max = xval[0];
for (int i = 1; i < 16; ++i) max = MAX(max, xval[i]);
if (!max) {
if (max < GROUP_MAX_EPS_IQ2_S) {
scales[ib] = 0;
continue;
}