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cvector: better prompt handling, add "mean vector" method (#8069)

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* remove completions file

* fix inverted vector

* add mean method

* code style

* remove inverted pca hotfix
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Xuan Son Nguyen 2024-06-25 13:59:54 +02:00 • committed by GitHub
parent 48e6b92cc3
commit 49c03c79cd
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8 changed files with 133 additions and 60 deletions
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examples/cvector-generator/mean.hpp Normal file
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#include "common.h"
#include "llama.h"
#include "ggml.h"
#include <string>
#include <vector>
#include <math.h>
namespace mean {
static void run(
const std::vector<struct ggml_tensor *> & v_input, // shape of v_input[0]: [n_embd, n_samples]
const std::vector<struct ggml_tensor *> & v_output) {
printf("%s: Running mean...\n", __func__);
for (size_t il = 0; il < v_input.size(); ++il) {
// prepare output vector
struct ggml_tensor * ctrl_out = v_output[il];
ggml_format_name(ctrl_out, "direction.%ld", il+1);
// calculate mean vector
struct ggml_tensor * t_layer = v_input[il];
GGML_ASSERT(t_layer->ne[0] == ctrl_out->ne[0]); // == n_embd
for (int ic = 0; ic < t_layer->ne[0]; ic++) {
float f = 0.0;
for (int ir = 0; ir < t_layer->ne[1]; ir++) {
f += ggml_get_f32_nd(t_layer, ic, ir, 0, 0);
}
f /= t_layer->ne[1];
ggml_set_f32_1d(ctrl_out, ic, f);
}
// normalize output vector
float norm = 0.0;
for (int i = 0; i < ggml_nelements(ctrl_out); i++) {
float f = ggml_get_f32_1d(ctrl_out, i);
norm += f*f;
}
norm = sqrt(norm);
for (int i = 0; i < ggml_nelements(ctrl_out); i++) {
float f = ggml_get_f32_1d(ctrl_out, i);
ggml_set_f32_1d(ctrl_out, i, f / norm);
}
printf("%s: Done layer %d / %d\n", __func__, (int) il+1, (int) v_input.size());
}
}
}