hf_text-generation-inference/backends/trtllm/include/backend.h

123 lines
3.2 KiB
C++

//
// Created by Morgan Funtowicz on 6/30/24.
//
#ifndef TGI_TRTLLM_BACKEND_H
#define TGI_TRTLLM_BACKEND_H
#include <cmath>
#include <filesystem>
#include <span>
#include <vector>
#include <nlohmann/json.hpp>
#include <tensorrt_llm/runtime/common.h>
#include <tensorrt_llm/executor/executor.h>
#include <tensorrt_llm/plugins/api/tllmPlugin.h>
using json = nlohmann::json;
namespace tle = tensorrt_llm::executor;
namespace huggingface::tgi::backends {
using RequestId = tle::IdType;
using TokenId = tle::TokenIdType;
/**
* Initialize all the components required by TRTLLM.
* It is required to call this function before attempting to load any engine
*/
void InitializeBackend();
/**
*
* @param config TensorRT-LLM configuration object
* @param workerPath Path to the "executorWorker" provided by TensorRT-LLM when using orchestrator mode
* @return
*/
tle::ExecutorConfig GetExecutorConfig(const json &config, const std::string &workerPath);
/**
* Get the sampling configuration from the parameters provided by TGI
* @param topK
* @param topP
* @param temperature
* @param repetition_penalty
* @param frequency_penalty
* @param seed
* @return
*/
tle::SamplingConfig GetSamplingConfig(
const uint32_t topK,
const float_t topP,
const float_t temperature,
const float_t repetition_penalty,
const float_t frequency_penalty,
const uint64_t seed
);
/**
*
*/
class TensorRtLlmBackend {
private:
const json config;
tle::Executor executor;
public:
explicit TensorRtLlmBackend(
const std::filesystem::path &engineFolder,
const std::filesystem::path &executorWorker
);
/**
* Indicate if the backend is ready to accept incoming request
* @return true if ready, false otherwise
*/
[[nodiscard]] bool IsReady() const;
/**
* Query the executor for the number of token available for pulling
* @return
*/
[[nodiscard]] size_t NumResponsesReady() const;
/**
* Submit a new generation task to the executor
* @param tokens
* @param topK
* @param topP
* @param temperature
* @param repetition_penalty
* @param frequency_penalty
* @param seed
* @return Request id related to this generation for reference
*/
[[nodiscard]] RequestId Submit(
const std::vector <TokenId> &tokens,
const uint32_t maxNewTokens,
const int32_t topK,
const float_t topP,
const float_t temperature,
const float_t repetition_penalty,
const float_t frequency_penalty,
const uint64_t seed
);
/**
*
* @param requestId The request id to poll the generation results
* @return
*/
std::vector <tle::Response> Poll(RequestId requestId);
/**
* Stop the underlying executor
*/
void Shutdown();
};
}
#endif //TGI_TRTLLM_BACKEND_H