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#include <mbgl/test/stub_file_source.hpp>
#include <mbgl/test/util.hpp>
#include <mbgl/map/map.hpp>
#include <mbgl/platform/default/headless_backend.hpp>
#include <mbgl/platform/default/offscreen_view.hpp>
#include <mbgl/platform/default/thread_pool.hpp>
#include <mbgl/util/io.hpp>
#include <mbgl/util/run_loop.hpp>
#include <algorithm>
#include <iostream>
#include <iterator>
#include <string>
#include <unordered_map>
#include <utility>
#include <stdlib.h>
#include <unistd.h>
using namespace mbgl;
using namespace std::literals::string_literals;
long getRSS() {
auto statm = util::read_file("/proc/self/statm");
std::vector<std::string> stats;
std::istringstream stream(statm);
std::copy(std::istream_iterator<std::string>(stream),
std::istream_iterator<std::string>(),
std::back_inserter(stats));
return std::stol(stats[1]) * getpagesize();
}
bool isUsingJemalloc() {
const char* preload = getenv("LD_PRELOAD");
if (preload) {
return std::string(preload).find("libjemalloc.so") != std::string::npos;
} else {
return false;
}
}
class MemoryTest {
public:
MemoryTest() {
fileSource.styleResponse = [&](const Resource& res) { return response("style_" + getType(res) + ".json");};
fileSource.tileResponse = [&](const Resource& res) { return response(getType(res) + ".tile"); };
fileSource.sourceResponse = [&](const Resource& res) { return response("source_" + getType(res) + ".json"); };
fileSource.glyphsResponse = [&](const Resource&) { return response("glyphs.pbf"); };
fileSource.spriteJSONResponse = [&](const Resource&) { return response("sprite.json"); };
fileSource.spriteImageResponse = [&](const Resource&) { return response("sprite.png"); };
}
util::RunLoop runLoop;
HeadlessBackend backend;
OffscreenView view{ backend.getContext(), {{ 512, 512 }} };
StubFileSource fileSource;
ThreadPool threadPool { 4 };
private:
Response response(const std::string& path) {
Response result;
auto it = cache.find(path);
if (it != cache.end()) {
result.data = it->second;
} else {
auto data = std::make_shared<std::string>(
util::read_file("test/fixtures/resources/"s + path));
cache.insert(it, std::make_pair(path, data));
result.data = data;
}
return result;
}
std::string getType(const Resource& res) {
if (res.url.find("satellite") != std::string::npos) {
return "raster";
} else {
return "vector";
}
};
std::unordered_map<std::string, std::shared_ptr<std::string>> cache;
};
TEST(Memory, Vector) {
MemoryTest test;
Map map(test.backend, { { 256, 256 } }, 2, test.fileSource, test.threadPool, MapMode::Still);
map.setZoom(16); // more map features
map.setStyleURL("mapbox://streets");
test::render(map, test.view);
}
TEST(Memory, Raster) {
MemoryTest test;
Map map(test.backend, { { 256, 256 } }, 2, test.fileSource, test.threadPool, MapMode::Still);
map.setStyleURL("mapbox://satellite");
test::render(map, test.view);
}
// This test will measure the size of a Map object
// after rendering a raster and a vector style. The
// idea is to try to keep the memory footprint within
// reasonable limits, so this test acts more like a
// safeguard.
TEST(Memory, Footprint) {
if (!isUsingJemalloc()) {
return;
}
MemoryTest test;
auto renderMap = [&](Map& map, const char* style){
map.setZoom(16);
map.setStyleURL(style);
test::render(map, test.view);
};
// Warm up buffers and cache.
for (unsigned i = 0; i < 10; ++i) {
Map map(test.backend, {{ 256, 256 }}, 2, test.fileSource, test.threadPool, MapMode::Still);
renderMap(map, "mapbox://streets");
renderMap(map, "mapbox://satellite");
};
// Process close callbacks, mostly needed by
// libuv runloop.
test.runLoop.runOnce();
std::vector<std::unique_ptr<Map>> maps;
unsigned runs = 15;
long vectorInitialRSS = getRSS();
for (unsigned i = 0; i < runs; ++i) {
auto vector = std::make_unique<Map>(test.backend, std::array<uint16_t, 2>{ { 256, 256 } },
2, test.fileSource, test.threadPool, MapMode::Still);
renderMap(*vector, "mapbox://streets");
maps.push_back(std::move(vector));
};
double vectorFootprint = (getRSS() - vectorInitialRSS) / double(runs);
long rasterInitialRSS = getRSS();
for (unsigned i = 0; i < runs; ++i) {
auto raster = std::make_unique<Map>(test.backend, std::array<uint16_t, 2>{ { 256, 256 } },
2, test.fileSource, test.threadPool, MapMode::Still);
renderMap(*raster, "mapbox://satellite");
maps.push_back(std::move(raster));
};
double rasterFootprint = (getRSS() - rasterInitialRSS) / double(runs);
ASSERT_LT(vectorFootprint, 65 * 1024 * 1024) << "\
mbgl::Map footprint over 65MB for vector styles.";
ASSERT_LT(rasterFootprint, 25 * 1024 * 1024) << "\
mbgl::Map footprint over 25MB for raster styles.";
}
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