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VNC-127 Introduce TBB task arena for optimized parallel execution

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El 2025-05-08 16:59:22 +05:00
parent c89bf7b119
commit b51a09c477
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2 changed files with 11 additions and 4 deletions
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9
common/rfb/EncodeManager.cxx
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@ -44,6 +44,7 @@
#include <rfb/TightWEBPEncoder.h>
#include <rfb/TightQOIEncoder.h>
#include <execution>
#include <tbb/parallel_for.h>
using namespace rfb;
@ -210,6 +211,9 @@ EncodeManager::EncodeManager(SConnection* conn_, EncCache *encCache_) : conn(con
dynamicQualityMin = Server::dynamicQualityMin;
dynamicQualityOff = Server::dynamicQualityMax - Server::dynamicQualityMin;
}
const auto num_cores = tbb::this_task_arena::max_concurrency() / 2;
arena.initialize(num_cores);
}
EncodeManager::~EncodeManager()
@ -1237,13 +1241,14 @@ void EncodeManager::writeRects(const Region& changed, const PixelBuffer* pb,
}
scalingTime = msSince(&scalestart);
std::for_each(std::execution::par_unseq, std::begin(indices), std::end(indices), [&](size_t i)
{
arena.execute([&] {
tbb::parallel_for(static_cast<size_t>(0), subrects_size, [&](size_t i) {
encoderTypes[i] = getEncoderType(subrects[i], pb, &palettes[i], compresseds[i],
&isWebp[i], &fromCache[i],
scaledpb, scaledrects[i], ms[i]);
checkWebpFallback(start);
});
});
for (uint32_t i = 0; i < subrects_size; ++i) {
if (encoderTypes[i] == encoderFullColour) {

2
common/rfb/EncodeManager.h
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@ -32,6 +32,7 @@
#include <stdint.h>
#include <atomic>
#include <tbb/task_arena.h>
#include <sys/time.h>
namespace rfb {
@ -167,6 +168,7 @@ namespace rfb {
protected:
SConnection *conn;
tbb::task_arena arena;
std::vector<Encoder*> encoders;
std::vector<int> activeEncoders;