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/*
* SPDX-FileCopyrightText: Copyright 2022-2024 Arm Limited and/or its affiliates <open-source-office@arm.com>
* 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
*
* 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.
*/
/*****************************************************************************
* Includes
*****************************************************************************/
#include "inference_runner.hpp"
#include <cstdlib>
#include <ethosu_log.h>
#include <ethosu_profiler.hpp>
#if defined(ETHOSU)
#include <ethosu_driver.h>
#include <pmu_ethosu.h>
#endif
/*****************************************************************************
* JobContext
*****************************************************************************/
struct JobContext {
JobContext(Message *msg) : rsp(msg), profiler_context({}) {}
Message *rsp;
struct ethosu_profiler_context profiler_context;
};
/*****************************************************************************
* InferenceRunner
*****************************************************************************/
InferenceRunner::InferenceRunner(uint8_t *tensorArena,
size_t arenaSize,
MessageHandler::InferenceQueue &_inferenceQueue,
MessageHandler::ResponseQueue &_responseQueue) :
inferenceQueue(_inferenceQueue),
responseQueue(_responseQueue), inference(tensorArena, arenaSize) {
BaseType_t ret = xTaskCreate(inferenceTask, "inferenceTask", 8 * 1024, this, 4, &taskHandle);
if (ret != pdPASS) {
LOG_ERR("Failed to create inference task");
abort();
}
}
InferenceRunner::~InferenceRunner() {
vTaskDelete(taskHandle);
}
void InferenceRunner::inferenceTask(void *param) {
auto _this = static_cast<InferenceRunner *>(param);
LOG_DEBUG("Starting inference task");
while (true) {
Message *message;
auto ret = _this->inferenceQueue.receive(message);
if (ret) {
abort();
}
auto &rpmsg = message->rpmsg;
switch (rpmsg.header.type) {
case EthosU::ETHOSU_RPMSG_INFERENCE_REQ: {
_this->handleInferenceRequest(message->src, rpmsg.header.msg_id, rpmsg.inf_req);
break;
}
default: {
LOG_WARN("Unsupported message for inference runner. type=%lu", rpmsg.header.type);
}
}
delete message;
}
}
void InferenceRunner::handleInferenceRequest(const uint32_t src,
const uint64_t msgId,
const EthosU::ethosu_rpmsg_inference_req &request) {
auto jobContext = new JobContext(
new Message(src, EthosU::ETHOSU_RPMSG_INFERENCE_RSP, msgId, sizeof(EthosU::ethosu_rpmsg_inference_rsp)));
auto &response = jobContext->rsp->rpmsg.inf_rsp;
// Setup PMU configuration
response.pmu_cycle_counter_enable = request.pmu_cycle_counter_enable;
for (int i = 0; i < ETHOSU_RPMSG_PMU_MAX; i++) {
response.pmu_event_config[i] = request.pmu_event_config[i];
}
// Run inference
auto job = makeInferenceJob(request, *jobContext);
auto failed = inference.runJob(job);
ethosu_profiler_report(&jobContext->profiler_context);
// Send response rpmsg
response.ofm_count = job.output.size();
response.status = failed ? EthosU::ETHOSU_RPMSG_STATUS_ERROR : EthosU::ETHOSU_RPMSG_STATUS_OK;
for (size_t i = 0; i < job.output.size(); ++i) {
response.ofm_size[i] = job.output[i].size;
}
responseQueue.send(jobContext->rsp);
delete jobContext;
}
InferenceProcess::InferenceJob InferenceRunner::makeInferenceJob(const EthosU::ethosu_rpmsg_inference_req &request,
JobContext &jobContext) {
InferenceProcess::InferenceJob job;
job.networkModel =
InferenceProcess::DataPtr(reinterpret_cast<void *>(request.network.buffer.ptr), request.network.buffer.size);
for (uint32_t i = 0; i < request.ifm_count; ++i) {
job.input.push_back(
InferenceProcess::DataPtr(reinterpret_cast<void *>(request.ifm[i].ptr), request.ifm[i].size));
}
for (uint32_t i = 0; i < request.ofm_count; ++i) {
job.output.push_back(
InferenceProcess::DataPtr(reinterpret_cast<void *>(request.ofm[i].ptr), request.ofm[i].size));
}
job.externalContext = &jobContext;
return job;
}
#if defined(ETHOSU)
extern "C" {
void ethosu_inference_begin(ethosu_driver *drv, void *userArg) {
LOG_DEBUG("");
auto context = static_cast<JobContext *>(userArg);
auto &response = context->rsp->rpmsg.inf_rsp;
// Calculate maximum number of events
const int numEvents = std::min(static_cast<int>(ETHOSU_PMU_Get_NumEventCounters()), ETHOSU_RPMSG_PMU_MAX);
// Enable PMU
ETHOSU_PMU_Enable(drv);
// Configure and enable events
for (int i = 0; i < numEvents; i++) {
ETHOSU_PMU_Set_EVTYPER(drv, i, static_cast<ethosu_pmu_event_type>(response.pmu_event_config[i]));
ETHOSU_PMU_CNTR_Enable(drv, 1u << i);
}
// Enable cycle counter
if (response.pmu_cycle_counter_enable) {
ETHOSU_PMU_PMCCNTR_CFG_Set_Stop_Event(drv, ETHOSU_PMU_NPU_IDLE);
ETHOSU_PMU_PMCCNTR_CFG_Set_Start_Event(drv, ETHOSU_PMU_NPU_ACTIVE);
ETHOSU_PMU_CNTR_Enable(drv, ETHOSU_PMU_CCNT_Msk);
ETHOSU_PMU_CYCCNT_Reset(drv);
}
// Reset all counters
ETHOSU_PMU_EVCNTR_ALL_Reset(drv);
ethosu_profiler_start(&context->profiler_context);
}
void ethosu_inference_end(ethosu_driver *drv, void *userArg) {
LOG_DEBUG("");
auto context = static_cast<JobContext *>(userArg);
auto &response = context->rsp->rpmsg.inf_rsp;
ethosu_profiler_end(&context->profiler_context);
// Get cycle counter
if (response.pmu_cycle_counter_enable) {
uint64_t cycleCount = ETHOSU_PMU_Get_CCNTR(drv);
response.pmu_cycle_counter_count += cycleCount;
ethosu_profiler_add_to_pmu_cycles(&context->profiler_context, cycleCount);
}
// Calculate maximum number of events
const int numEvents = std::min(static_cast<int>(ETHOSU_PMU_Get_NumEventCounters()), ETHOSU_RPMSG_PMU_MAX);
// Get event counters
int i;
for (i = 0; i < numEvents; i++) {
uint32_t eventValue = ETHOSU_PMU_Get_EVCNTR(drv, i);
response.pmu_event_count[i] += eventValue;
ethosu_profiler_add_to_pmu_event(&context->profiler_context, i, eventValue);
}
for (; i < ETHOSU_RPMSG_PMU_MAX; i++) {
response.pmu_event_config[i] = 0;
response.pmu_event_count[i] = 0;
}
// Disable PMU
ETHOSU_PMU_Disable(drv);
}
}
#endif
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