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configs.h
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configs.h
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// Copyright 2024 Google LLC
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Model configurations
#ifndef THIRD_PARTY_GEMMA_CPP_CONFIGS_H_
#define THIRD_PARTY_GEMMA_CPP_CONFIGS_H_
// Allow changing pre-allocated kv cache size as a compiler flag
#ifndef GEMMA_MAX_SEQLEN
#define GEMMA_MAX_SEQLEN 4096
#endif // !GEMMA_MAX_SEQLEN
// Allow changing k parameter of `SampleTopK` as a compiler flag
#ifndef GEMMA_TOPK
#define GEMMA_TOPK 1
#endif // !GEMMA_TOPK
#include <stddef.h>
#include <array>
// copybara:import_next_line:gemma_cpp
#include "compression/sfp.h"
#include "hwy/base.h" // hwy::bfloat16_t
// Allowable types for GEMMA_WEIGHT_T (can be specified at compilation time):
// float, hwy::bfloat16_t, SfpStream, NuqStream
#ifndef GEMMA_WEIGHT_T
#define GEMMA_WEIGHT_T SfpStream
#endif // !GEMMA_WEIGHT_T
namespace gcpp {
static constexpr size_t kSeqLen = GEMMA_MAX_SEQLEN;
static constexpr size_t kTopK = GEMMA_TOPK;
enum class LayerAttentionType {
kGemma,
kGriffinRecurrentBlock,
};
template <size_t kNum>
constexpr std::array<LayerAttentionType, kNum> FixedLayerConfig(
LayerAttentionType type) {
std::array<LayerAttentionType, kNum> config = {};
for (LayerAttentionType& l : config) {
l = type;
}
return config;
}
struct ConfigGemma7B {
static constexpr int kSeqLen = gcpp::kSeqLen;
static constexpr int kVocabSize = 256000;
static constexpr std::array<LayerAttentionType, 28> kLayerConfig =
FixedLayerConfig<28>(LayerAttentionType::kGemma);
static constexpr int kLayers = kLayerConfig.size();
static constexpr int kModelDim = 3072;
static constexpr int kFFHiddenDim = 16 * 3072 / 2; // = 24576
static constexpr int kHeads = 16;
static constexpr int kKVHeads = 16; // standard MHA
static constexpr int kQKVDim = 256; // query size == key size == value size
static constexpr int kTopK = gcpp::kTopK;
// SSM config.
static constexpr int kConv1dWidth = 0;
static constexpr bool kFFBiases = false;
static constexpr bool kSoftmaxAttnOutputBiases = false;
static constexpr bool kUseHalfRope = false;
static constexpr bool kUseLocalAttention = false;
static constexpr bool kInterleaveQKV = true;
static constexpr int kNumTensorScales = 0;
using WeightT = GEMMA_WEIGHT_T;
};
struct ConfigGemma2B {
static constexpr int kSeqLen = gcpp::kSeqLen;
static constexpr int kVocabSize = 256000;
static constexpr std::array<LayerAttentionType, 18> kLayerConfig =
FixedLayerConfig<18>(LayerAttentionType::kGemma);
static constexpr int kLayers = kLayerConfig.size();
static constexpr int kModelDim = 2048;
static constexpr int kFFHiddenDim = 16 * 2048 / 2; // = 16384
static constexpr int kHeads = 8;
static constexpr int kKVHeads = 1;
static constexpr int kQKVDim = 256; // query size == key size == value size
static constexpr int kTopK = gcpp::kTopK;
// SSM config.
static constexpr int kConv1dWidth = 0;
static constexpr bool kFFBiases = false;
static constexpr bool kSoftmaxAttnOutputBiases = false;
static constexpr bool kUseHalfRope = false;
static constexpr bool kUseLocalAttention = false;
static constexpr bool kInterleaveQKV = true;
static constexpr int kNumTensorScales = 0;
using WeightT = GEMMA_WEIGHT_T;
};
struct ConfigGriffin2B {
// Griffin uses local attention, so kSeqLen is actually the local attention
// window.
static constexpr int kSeqLen = 2048;
static constexpr int kVocabSize = 256000;
static constexpr std::array<LayerAttentionType, 26> kLayerConfig = {
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGemma,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGemma,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGemma,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGemma,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGemma,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGemma,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGemma,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGemma,
LayerAttentionType::kGriffinRecurrentBlock,
LayerAttentionType::kGriffinRecurrentBlock,
};
static constexpr int kLayers = kLayerConfig.size();
static constexpr int kModelDim = 2560;
static constexpr int kFFHiddenDim = 7680;
static constexpr int kHeads = 10;
static constexpr int kKVHeads = 1;
static constexpr int kQKVDim = 256; // query size == key size == value size
static constexpr int kTopK = gcpp::kTopK;
// SSM config.
static constexpr int kConv1dWidth = 4;
static constexpr bool kFFBiases = true;
static constexpr bool kSoftmaxAttnOutputBiases = true;
static constexpr bool kUseHalfRope = true;
static constexpr bool kUseLocalAttention = true;
static constexpr bool kInterleaveQKV = false;
static constexpr int kNumTensorScales = 140;
using WeightT = GEMMA_WEIGHT_T;
};
} // namespace gcpp
#endif // THIRD_PARTY_GEMMA_CPP_CONFIGS_H_