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/*
* Copyright (C) 2019-2020 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "level_zero/tools/source/metrics/metric_streamer_imp.h"
#include "shared/source/helpers/debug_helpers.h"
#include "level_zero/core/source/device/device.h"
#include "level_zero/tools/source/metrics/metric_query_imp.h"
namespace L0 {
ze_result_t MetricStreamerImp::readData(uint32_t maxReportCount, size_t *pRawDataSize,
uint8_t *pRawData) {
DEBUG_BREAK_IF(rawReportSize == 0);
auto metricGroup = MetricGroup::fromHandle(hMetricGroup);
// Return required size if requested.
if (*pRawDataSize == 0) {
*pRawDataSize = getRequiredBufferSize(maxReportCount);
return ZE_RESULT_SUCCESS;
}
// User is expected to allocate space.
if (pRawData == nullptr) {
return ZE_RESULT_ERROR_INVALID_ARGUMENT;
}
// Retrieve the number of reports that fit into the buffer.
uint32_t reportCount = static_cast<uint32_t>(*pRawDataSize / rawReportSize);
// Read streamer data.
const ze_result_t result = metricGroup->readIoStream(reportCount, *pRawData);
if (result == ZE_RESULT_SUCCESS) {
*pRawDataSize = reportCount * rawReportSize;
}
return result;
}
ze_result_t MetricStreamerImp::close() {
const auto result = stopMeasurements();
if (result == ZE_RESULT_SUCCESS) {
auto device = Device::fromHandle(hDevice);
auto &metricContext = device->getMetricContext();
auto &metricsLibrary = metricContext.getMetricsLibrary();
// Clear metric streamer reference in context.
// Another metric streamer instance or query can be used.
metricContext.setMetricStreamer(nullptr);
// Close metrics library (if was used to generate streamer's marker gpu commands).
// It will allow metric query to use Linux Tbs stream exclusively
// (to activate metric sets and to read context switch reports).
metricsLibrary.release();
// Release notification event.
if (pNotificationEvent != nullptr) {
pNotificationEvent->metricStreamer = nullptr;
}
// Delete metric streamer.
delete this;
}
return result;
}
ze_result_t MetricStreamerImp::initialize(ze_device_handle_t hDevice,
zet_metric_group_handle_t hMetricGroup) {
this->hDevice = hDevice;
this->hMetricGroup = hMetricGroup;
auto metricGroup = MetricGroup::fromHandle(this->hMetricGroup);
rawReportSize = metricGroup->getRawReportSize();
return ZE_RESULT_SUCCESS;
}
ze_result_t MetricStreamerImp::startMeasurements(uint32_t ¬ifyEveryNReports,
uint32_t &samplingPeriodNs,
ze_event_handle_t hNotificationEvent) {
auto metricGroup = MetricGroup::fromHandle(hMetricGroup);
uint32_t requestedOaBufferSize = getOaBufferSize(notifyEveryNReports);
const ze_result_t result = metricGroup->openIoStream(samplingPeriodNs, requestedOaBufferSize);
// Return oa buffer size and notification event aligned to gpu capabilities.
if (result == ZE_RESULT_SUCCESS) {
oaBufferSize = requestedOaBufferSize;
notifyEveryNReports = getNotifyEveryNReports(requestedOaBufferSize);
}
// Associate notification event with metric streamer.
pNotificationEvent = Event::fromHandle(hNotificationEvent);
if (pNotificationEvent != nullptr) {
pNotificationEvent->metricStreamer = this;
}
return result;
}
ze_result_t MetricStreamerImp::stopMeasurements() {
auto metricGroup = MetricGroup::fromHandle(hMetricGroup);
const ze_result_t result = metricGroup->closeIoStream();
if (result == ZE_RESULT_SUCCESS) {
oaBufferSize = 0;
}
return result;
}
uint32_t MetricStreamerImp::getOaBufferSize(const uint32_t notifyEveryNReports) const {
// Notification is on half full buffer, hence multiplication by 2.
return notifyEveryNReports * rawReportSize * 2;
}
uint32_t MetricStreamerImp::getNotifyEveryNReports(const uint32_t oaBufferSize) const {
// Notification is on half full buffer, hence division by 2.
return rawReportSize
? oaBufferSize / (rawReportSize * 2)
: 0;
}
Event::State MetricStreamerImp::getNotificationState() {
auto metricGroup = MetricGroup::fromHandle(hMetricGroup);
bool reportsReady = metricGroup->waitForReports(0) == ZE_RESULT_SUCCESS;
return reportsReady
? Event::State::STATE_SIGNALED
: Event::State::STATE_INITIAL;
}
uint32_t MetricStreamerImp::getRequiredBufferSize(const uint32_t maxReportCount) const {
DEBUG_BREAK_IF(rawReportSize == 0);
uint32_t maxOaBufferReportCount = oaBufferSize / rawReportSize;
// Trim to OA buffer size if needed.
return maxReportCount > maxOaBufferReportCount ? oaBufferSize
: maxReportCount * rawReportSize;
}
ze_result_t MetricStreamer::open(zet_context_handle_t hContext, zet_device_handle_t hDevice, zet_metric_group_handle_t hMetricGroup,
zet_metric_streamer_desc_t &desc, ze_event_handle_t hNotificationEvent,
zet_metric_streamer_handle_t *phMetricStreamer) {
auto pDevice = Device::fromHandle(hDevice);
auto &metricContext = pDevice->getMetricContext();
*phMetricStreamer = nullptr;
// Check whether metric streamer is already open.
if (metricContext.getMetricStreamer() != nullptr) {
return ZE_RESULT_ERROR_HANDLE_OBJECT_IN_USE;
}
// metric streamer cannot be used with query simultaneously
// (oa buffer cannot be shared).
if (metricContext.getMetricsLibrary().getMetricQueryCount() > 0) {
return ZE_RESULT_ERROR_NOT_AVAILABLE;
}
// Check metric group sampling type.
auto metricGroupProperties = MetricGroup::getProperties(hMetricGroup);
if (metricGroupProperties.samplingType != ZET_METRIC_GROUP_SAMPLING_TYPE_FLAG_TIME_BASED) {
return ZE_RESULT_ERROR_INVALID_ARGUMENT;
}
// Check whether metric group is activated.
if (!metricContext.isMetricGroupActivated(hMetricGroup)) {
return ZE_RESULT_NOT_READY;
}
auto pMetricStreamer = new MetricStreamerImp();
UNRECOVERABLE_IF(pMetricStreamer == nullptr);
pMetricStreamer->initialize(hDevice, hMetricGroup);
const ze_result_t result = pMetricStreamer->startMeasurements(
desc.notifyEveryNReports, desc.samplingPeriod, hNotificationEvent);
if (result == ZE_RESULT_SUCCESS) {
metricContext.setMetricStreamer(pMetricStreamer);
} else {
delete pMetricStreamer;
pMetricStreamer = nullptr;
return ZE_RESULT_ERROR_UNKNOWN;
}
*phMetricStreamer = pMetricStreamer->toHandle();
return ZE_RESULT_SUCCESS;
}
} // namespace L0
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