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Merge pull request #21636 from TolyaTalamanov:at/gapi_modeling_tool_drop_frames

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[G-API] Pipeline modeling tool - support frame dropping for source

* Implement drop frames functionality for dummy src

* Reconsider frame dropping

* Fix comments
This commit is contained in:
Anatoliy Talamanov 2022-03-15 18:27:39 +03:00 committed by GitHub
parent 54733eba6f
commit e5f2a8ebf2
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 120 additions and 44 deletions
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20
modules/gapi/samples/pipeline_modeling_tool.cpp
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@ -224,6 +224,7 @@ int main(int argc, char* argv[]) {
" if set to 0. If it's specified will be"
" applied for every pipeline. }"
"{ app_mode | realtime | Application mode (realtime/benchmark). }"
"{ drop_frames | false | Drop frames if they come earlier than pipeline is completed. }"
"{ exec_list | | A comma-separated list of pipelines that"
" will be executed. Spaces around commas"
" are prohibited. }";
@ -238,10 +239,11 @@ int main(int argc, char* argv[]) {
const auto load_config = cmd.get<std::string>("load_config");
const auto cached_dir = cmd.get<std::string>("cache_dir");
const auto log_file = cmd.get<std::string>("log_file");
const auto pl_mode = strToPLMode(cmd.get<std::string>("pl_mode"));
const auto cmd_pl_mode = strToPLMode(cmd.get<std::string>("pl_mode"));
const auto qc = cmd.get<int>("qc");
const auto app_mode = strToAppMode(cmd.get<std::string>("app_mode"));
const auto exec_str = cmd.get<std::string>("exec_list");
const auto drop_frames = cmd.get<bool>("drop_frames");
cv::FileStorage fs;
if (cfg.empty()) {
@ -306,7 +308,8 @@ int main(int argc, char* argv[]) {
if (app_mode == AppMode::BENCHMARK) {
latency = 0.0;
}
builder.setSource(src_name, latency, output);
auto src = std::make_shared<DummySource>(latency, output, drop_frames);
builder.setSource(src_name, src);
}
const auto& nodes_fn = check_and_get_fn(pl_fn, "nodes", name);
@ -352,9 +355,18 @@ int main(int argc, char* argv[]) {
builder.addEdge(edge);
}
auto cfg_pl_mode = readOpt<std::string>(pl_fn["mode"]);
// NB: Pipeline mode from config takes priority over cmd.
auto mode = readOpt<std::string>(pl_fn["mode"]);
builder.setMode(mode.has_value() ? strToPLMode(mode.value()) : pl_mode);
auto pl_mode = cfg_pl_mode.has_value()
? strToPLMode(cfg_pl_mode.value()) : cmd_pl_mode;
// NB: Using drop_frames with streaming pipelines will follow to
// incorrect performance results.
if (drop_frames && pl_mode == PLMode::STREAMING) {
throw std::logic_error(
"--drop_frames option is supported only for pipelines in \"regular\" mode");
}
builder.setMode(pl_mode);
// NB: Queue capacity from config takes priority over cmd.
auto config_qc = readOpt<int>(pl_fn["queue_capacity"]);

75
modules/gapi/samples/pipeline_modeling_tool/dummy_source.hpp
View File

@ -14,21 +14,23 @@ class DummySource final: public cv::gapi::wip::IStreamSource {
public:
using Ptr = std::shared_ptr<DummySource>;
DummySource(const double latency,
const OutputDescr& output);
const OutputDescr& output,
const bool drop_frames);
bool pull(cv::gapi::wip::Data& data) override;
cv::GMetaArg descr_of() const override;
private:
double m_latency;
cv::Mat m_mat;
using TimePoint =
std::chrono::time_point<std::chrono::high_resolution_clock>;
cv::optional<TimePoint> m_prev_pull_tp;
bool m_drop_frames;
double m_next_tick_ts = -1;
int64_t m_curr_seq_id = 0;
};
DummySource::DummySource(const double latency,
const OutputDescr& output)
: m_latency(latency) {
const OutputDescr& output,
const bool drop_frames)
: m_latency(latency), m_drop_frames(drop_frames) {
utils::createNDMat(m_mat, output.dims, output.precision);
utils::generateRandom(m_mat);
}
@ -36,23 +38,60 @@ DummySource::DummySource(const double latency,
bool DummySource::pull(cv::gapi::wip::Data& data) {
using namespace std::chrono;
using namespace cv::gapi::streaming;
// NB: In case it's the first pull.
if (!m_prev_pull_tp) {
m_prev_pull_tp = cv::util::make_optional(high_resolution_clock::now());
// NB: Wait m_latency before return the first frame.
if (m_next_tick_ts == -1) {
m_next_tick_ts = utils::timestamp<milliseconds>() + m_latency;
}
int64_t curr_ts = utils::timestamp<milliseconds>();
if (curr_ts < m_next_tick_ts) {
/*
* curr_ts
* |
* ------|----*-----|------->
* ^
* m_next_tick_ts
*
*
* NB: New frame will be produced at the m_next_tick_ts point.
*/
utils::sleep(m_next_tick_ts - curr_ts);
} else {
/*
* curr_ts
* +1 +2 |
* |----------|----------|----------|----*-----|------->
* ^ ^
* m_next_tick_ts ------------->
*
*
* NB: Shift m_next_tick_ts to the nearest tick before curr_ts and
* update current seq_id correspondingly.
*
* if drop_frames is enabled, wait for the next tick, otherwise
* return last writen frame (+2 at the picture above) immediately.
*/
int64_t num_frames =
static_cast<int64_t>((curr_ts - m_next_tick_ts) / m_latency);
m_curr_seq_id += num_frames;
m_next_tick_ts += num_frames * m_latency;
if (m_drop_frames) {
m_next_tick_ts += m_latency;
++m_curr_seq_id;
utils::sleep(m_next_tick_ts - curr_ts);
}
}
// NB: Just increase reference counter not to release mat memory
// after assigning it to the data.
cv::Mat mat = m_mat;
auto end = high_resolution_clock::now();
auto elapsed =
duration_cast<duration<double, std::milli>>(end - *m_prev_pull_tp).count();
auto delta = m_latency - elapsed;
if (delta > 0) {
utils::sleep(delta);
}
data.meta[meta_tag::timestamp] = int64_t{utils::timestamp<milliseconds>()};
data.meta[meta_tag::timestamp] = utils::timestamp<milliseconds>();
data.meta[meta_tag::seq_id] = m_curr_seq_id++;
data = mat;
m_prev_pull_tp = cv::util::make_optional(high_resolution_clock::now());
m_next_tick_ts += m_latency;
return true;
}

10
modules/gapi/samples/pipeline_modeling_tool/pipeline_builder.hpp
View File

@ -185,8 +185,7 @@ public:
void addInfer(const std::string& name, const InferParams& params);
void setSource(const std::string& name,
double latency,
const OutputDescr& output);
std::shared_ptr<DummySource> src);
void addEdge(const Edge& edge);
void setMode(PLMode mode);
@ -316,10 +315,9 @@ void PipelineBuilder::addEdge(const Edge& edge) {
}
void PipelineBuilder::setSource(const std::string& name,
double latency,
const OutputDescr& output) {
GAPI_Assert(!m_state->src);
m_state->src = std::make_shared<DummySource>(latency, output);
std::shared_ptr<DummySource> src) {
GAPI_Assert(!m_state->src && "Only single source pipelines are supported!");
m_state->src = src;
addCall(name, SourceCall{});
}

29
modules/gapi/samples/pipeline_modeling_tool/test_pipeline_modeling_tool.py
View File

@ -907,7 +907,7 @@ def test_error_invalid_pl_mode():
cfg_file = """\"%YAML:1.0
work_time: 1000
Pipelines:
PL1:
PL1:
source:
name: 'Src'
latency: 20
@ -929,3 +929,30 @@ PL1:
out = get_output(exec_str)
assert out.startswith('Unsupported AppMode: unknown\n'
'Please chose between: realtime and benchmark')
def test_error_drop_frames_with_streaming():
cfg_file = """\"%YAML:1.0
work_time: 1000
Pipelines:
PL1:
source:
name: 'Src'
latency: 20
output:
dims: [1,2,3,4]
precision: 'U8'
nodes:
- name: 'Node0'
type: 'Dummy'
time: 0.2
output:
dims: [1,2,3,4]
precision: 'U8'
edges:
- from: 'Src'
to: 'Node0'\" """
exec_str = '{} --cfg={} --pl_mode=streaming --drop_frames'.format(pipeline_modeling_tool, cfg_file)
out = get_output(exec_str)
assert out.startswith('--drop_frames option is supported only for pipelines in "regular" mode')